August 2022 - hpo-ims - Udfcd-Lists.Org

by f2p2＠udfcd.org

Time: 833 AM Wed August 31, 2022 Forecaster: Justin Brooks ------------------------- Heavy Precipitation Outlook Flash Flood Prediction Program ------------------------- HOT WITH A CHANCE FOR HIGH-BASED AFTERNOON/EVE RAIN SHOWERS/ISOLATED THUNDERSTORMS - High-pressure still dominates over the region today leading to another hot day as high temperatures reach the low 90's this afternoon. A weak disturbance will move through today bringing a slight chance for a few high-based rain showers/isolated thunderstorms. Some of these showers/thunderstorms already present over NE portions of the state, and should stay east of the District through the rest of the morning. - Additional storms will likely initiate between 1-3pm this afternoon as the disturbance moves into the region. Typical storm movements will be from NW to SE between 10-15mph helping limit point rainfall amounts, however, a gust front could initiate additional, stationary storms which could potentially increase chances for moderate to brief heavy rainfall today. Storm chances will continue through 8pm before skies start to clear through the rest of the evening. - Mild and dry conditions are expected through the overnight as lows drop into the upper 50's to low 60's across the plains with low to mid 50's along the foothills. STORM RAINFALL POTENTIAL AND DURATION: Typical rain showers/isolated thunderstorms will produce a trace to 0.1" in 10-30 minutes. A moderate rain showers/isolated thunderstorm could produce 0.1-0.3" in 10-30 minutes. WORST CASE SCENARIO: An anchored rain shower/thunderstorm, or training of thunderstorm cells has the potential to produce 0.3-1.2" in 45-75 minutes. A LOOK AHEAD: High-pressure holds through the rest of the week leading to mostly hot and dry conditions into the weekend. A very slight chance Thursday for another round of high-based shower activity, mainly along the foothills and Palmer Divide at this time. Friday remain hot and dry with highs in the 90's. Similar conditions both Saturday and Sunday with highs in the 90's along with continued dry conditions. LOCATION PRIME TIME 30-Minute Rainfall and % Probability Message Potential Plains Â Â Â Adams 200 PM TO 800 PM Trace (30%) to 0.1" (20%) to 0.3" (10%) NONE Arapahoe 200 PM TO 800 PM Trace (30%) to 0.1" (20%) to 0.3" (10%) NONE Boulder 200 PM TO 800 PM Trace (30%) to 0.1" (20%) to 0.3" (10%) NONE Broomfield 200 PM TO 800 PM Trace (30%) to 0.1" (20%) to 0.3" (10%) NONE Denver 200 PM TO 800 PM Trace (30%) to 0.1" (20%) to 0.3" (10%) NONE Douglas 200 PM TO 800 PM Trace (30%) to 0.1" (20%) to 0.3" (10%) NONE Jefferson 200 PM TO 800 PM Trace (30%) to 0.1" (20%) to 0.3" (10%) NONE Foothills above 6500ft Â Â Â Boulder 200 PM TO 800 PM Trace (40%) to 0.1" (20%) to 0.3" (10%) NONE Douglas 200 PM TO 800 PM Trace (40%) to 0.1" (20%) to 0.3" (10%) NONE Jefferson 200 PM TO 800 PM Trace (40%) to 0.1" (20%) to 0.3" (10%) NONE MONITOR NATIONAL WEATHER SERVICE FOR SEVERE WEATHER STATEMENTS. MHFD Flood Prediction Center: 303-458-0789 Â Â Â F2P2 Website [http://udfcd.org/Flash+Flood+Prediction+Program]

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Flash Flood Prediction Program

by f2p2＠udfcd.org

Time: 811 AM Tue August 30, 2022 Forecaster: Justin Brooks ------------------------- Heavy Precipitation Outlook Flash Flood Prediction Program ------------------------- WARM TODAY WITH MOSLTY DRY CONDITIONS LIKELY THROUGHOUT THE DAY - High-pressure will start to build over the region today leading to mostly sunny skies, with mild and mostly dry conditions throughout the day today. - High temperatures will be slightly above average in the upper 80's to low 90's on the plains with low to mid 80's along the foothills. Clouds will likely increase over the higher terrain this afternoon with a very slight chance for a few scattered rain showers/isolated thunderstorms along the Continental and Palmer Divide, however most areas in and around the District will remain dry. Best chance for any shower activity will be from 1-6pm with skies clearing into the evening. - Mild conditions are expected to continue this evening with overnight lows dropping into the upper 50's to low 60's on the plains with low to mid 50's along the foothills. STORM RAINFALL POTENTIAL AND DURATION: Typical high terrain rain showers will produce a TR-0.1" in 10-30 minutes. a moderate rain showers/isolated thunderstorm could produce 0.1-0.3" in 10-30 minutes. WORST CASE SCENARIO: A stronger storm is able to develop along the higher terrain and has the potential to produce 0.3-0.8" in 45-60 minutes. A LOOK AHEAD: A slight uptick in mid to upper-level moisture, combined with a weak disturbance tomorrow will bring a slightly better chance for scattered rain showers/thunderstorms tomorrow, however, most will likely be high-based which will bring minimal rainfall chances across the District. Conditions dry out Thursday with highs continuing in the 90's. Another slight chance for scattered high-based storms Friday afternoon and early evening, however the heavy rainfall threat will remain minimal at this time. LOCATION PRIME TIME 30-Minute Rainfall and % Probability Message Potential Plains Â Â Â Adams 200 PM TO 600 PM Trace (5%) to 0.1" (0%) NONE Arapahoe 200 PM TO 600 PM Trace (5%) to 0.1" (0%) NONE Boulder 200 PM TO 600 PM Trace (10%) to 0.1" (5%) NONE Broomfield 200 PM TO 600 PM Trace (5%) to 0.1" (0%) NONE Denver 200 PM TO 600 PM Trace (5%) to 0.1" (0%) NONE Douglas 200 PM TO 600 PM Trace (10%) to 0.1" (5%) NONE Jefferson 200 PM TO 600 PM Trace (10%) to 0.1" (5%) NONE Foothills above 6500ft Â Â Â Boulder 100 PM TO 500 PM Trace (15%) to 0.1" (10%) to 0.3" (5%) NONE Douglas 100 PM TO 500 PM Trace (15%) to 0.1" (10%) to 0.3" (5%) NONE Jefferson 100 PM TO 500 PM Trace (15%) to 0.1" (10%) to 0.3" (5%) NONE MONITOR NATIONAL WEATHER SERVICE FOR SEVERE WEATHER STATEMENTS. MHFD Flood Prediction Center: 303-458-0789 Â Â Â F2P2 Website [http://udfcd.org/Flash+Flood+Prediction+Program]

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Flash Flood Prediction Program

by f2p2＠udfcd.org

Time: 826 AM Mon August 29, 2022 Forecaster: Brad Simmons ------------------------- Heavy Precipitation Outlook Flash Flood Prediction Program ------------------------- WARM AND DRY WITH PLENTY OF SUNSHINE - A weak cold front has moved through this morning and will lower temperatures a few degrees today with afternoon highs reaching the mid to upper 80's over the plains with a few areas possibly touching 90 briefly. Foothills will remain in the 70's and lower 80's for highs. - There will be a few fair weather cumulus clouds that develop this afternoon but no shower or thunderstorm activity will develop due to a warm layer of air aloft capping cloud growth. Sunny skies this morning will become mostly sunny to partly cloudy this afternoon. - Winds will be light, varying from N/NW to E/NE in the 5-15mph range. STORM RAINFALL POTENTIAL AND DURATION: No precipitation expected today or tonight. A LOOK AHEAD: We will tack on a few degrees for highs on Tuesday with readings in the upper 80's to lower 90's over the plains with more comfortable 70's and 80's in the Front Range foothills. Dry conditions are expected to persist over the lower elevations with possibly a very isolated afternoon thunderstorm over the mountains and higher foothills. MONITOR NATIONAL WEATHER SERVICE FOR SEVERE WEATHER STATEMENTS. MHFD Flood Prediction Center: 303-458-0789 Â Â Â F2P2 Website [http://udfcd.org/Flash+Flood+Prediction+Program]

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Flash Flood Prediction Program

by f2p2＠udfcd.org

Time: 848 AM Sun August 28, 2022 Forecaster: Brad Simmons ------------------------- Heavy Precipitation Outlook Flash Flood Prediction Program ------------------------- ISOLATED/HIGH-BASED AFTERNOON THUNDERSTORMS - Temperatures will continue to run above seasonal averages for the date with afternoon highs topping out in the upper 80's to lower 90's over the plains with 70's and 80's in the Front Range foothills. Normal high for Denver today is 86 degrees. Surface moisture is lacking but there is enough mid and high level moisture to result in a build-up of clouds this afternoon and isolated thunderstorm activity. - Isolated thunderstorms will develop over the higher terrain between 1-2pm and then spread out onto the plains after 2pm with chances through about sunset. After sunset dry conditions will develop and continue through the remainder of the evening and overnight period. - Showers and weak thunderstorms will be high-based producing minimal rainfall and gusty winds. Winds may gust up to 30-40mph or more briefly in and near active storms. Typical storms will produce mainly just some sprinkles but a few areas will likely pick up measurable rain. There is no threat for heavy rainfall. Storms will move from W to E at around 15mph. STORM RAINFALL POTENTIAL AND DURATION: Rain showers and weak thunderstorms will produce a trace to 0.2" of rain. A LOOK AHEAD: Temperatures will continue to run in the upper 80's to lower 90's for highs over the plains on Monday with dry conditions over the District. LOCATION PRIME TIME 30-Minute Rainfall and % Probability Message Potential Plains Â Â Â Adams 200 PM TO 700 PM Trace (40%) to 0.1" (20%) to 0.2" (5%) NONE Arapahoe 200 PM TO 700 PM Trace (40%) to 0.1" (20%) to 0.2" (5%) NONE Boulder 200 PM TO 700 PM Trace (50%) to 0.1" (25%) to 0.2" (5%) NONE Broomfield 200 PM TO 700 PM Trace (40%) to 0.1" (20%) to 0.2" (5%) NONE Denver 200 PM TO 700 PM Trace (40%) to 0.1" (20%) to 0.2" (5%) NONE Douglas 200 PM TO 700 PM Trace (50%) to 0.1" (25%) to 0.2" (5%) NONE Jefferson 200 PM TO 700 PM Trace (50%) to 0.1" (25%) to 0.2" (5%) NONE Foothills above 6500ft Â Â Â Boulder 100 PM TO 700 PM Trace (60%) to 0.1" (30%) to 0.2" (10%) NONE Douglas 100 PM TO 700 PM Trace (60%) to 0.1" (30%) to 0.2" (10%) NONE Jefferson 100 PM TO 700 PM Trace (60%) to 0.1" (30%) to 0.2" (10%) NONE MONITOR NATIONAL WEATHER SERVICE FOR SEVERE WEATHER STATEMENTS. MHFD Flood Prediction Center: 303-458-0789 Â Â Â F2P2 Website [http://udfcd.org/Flash+Flood+Prediction+Program]

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Flash Flood Prediction Program

by f2p2＠udfcd.org

Time: 853 AM Sat August 27, 2022 Forecaster: Brad Simmons ------------------------- Heavy Precipitation Outlook Flash Flood Prediction Program ------------------------- GENERALLY DRY WITH SLIGHTLY ABOVE NORMAL TEMPERATURES - Conditions will be generally dry District wide today with temperatures running slightly above seasonal averages. Highs this afternoon will top out in the upper 80's to lower 90's over the plains with 70's and 80's in the Front Range foothills. Normal high for Denver today is 86 degrees. - Sunny skies this morning will give way to partly cloudy skies this afternoon as clouds build over the mountains and push eastward over the I-25 corridor. No meaningful precipitation is expected but there could be a few isolated sprinkles over the foothills and adjacent plains but most areas will be completely dry today. - Surface winds will vary from SW to NW in the 5-15mph range with occasional higher gusts. STORM RAINFALL POTENTIAL AND DURATION: No meaningful precipitation expected, mainly just a trace in areas that experience a light rain shower or sprinkle. A LOOK AHEAD: Temperatures will continue in the upper 80's to lower 90's for highs over the plains on Sunday. There will be a build up of clouds during the afternoon and an isolated rain shower or weak thunderstorm cannot be ruled out, favoring the foothills and Palmer Divide. Ay storms that do manage to develop will produce minimal moisture. MONITOR NATIONAL WEATHER SERVICE FOR SEVERE WEATHER STATEMENTS. MHFD Flood Prediction Center: 303-458-0789 Â Â Â F2P2 Website [http://udfcd.org/Flash+Flood+Prediction+Program]

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Flash Flood Prediction Program

by f2p2＠udfcd.org

Time: 947 AM Fri August 26, 2022 Forecaster: Brad Simmons ------------------------- Heavy Precipitation Outlook Flash Flood Prediction Program ------------------------- SEASONAL TEMPERATURES WITH WIDELY SCATTERED AFTERNOON THUNDERSTORMS - Trough of low pressure overhead will sag southward during the day and result in widely scattered afternoon thunderstorms over the District. Temperatures will warm into the mid and upper 80's over the plains with 70's in the Front Range foothills. Normal high for Denver today is 86 degrees. - Showers and weak to moderate thunderstorms will develop over the foothills by early afternoon then spread out onto the plains between 1-3pm. Generally one round of showers/thunderstorms is expected over the plains with conditions drying out between 6-8pm. Thunderstorms will likely be more numerous W of I-25 and S of I-70. Storm motions will be from W to E at around 15mph. - Thunderstorms are expected to be weak to moderate in intensity producing mainly light to brief moderate rain. A stronger storm cannot be completely ruled out and will have the potential for brief heavy rainfall. After sunset conditions will dry out and remain dry for the remainder of the evening and overnight period. STORM RAINFALL POTENTIAL AND DURATION: Rain showers and weak thunderstorms will produce a trace to 0.2" of rain. A moderate thunderstorm will have the potential to produce rainfall rates of 0.2-0.5" in 10-30 minutes. WORST CASE SCENARIO: A slow moving strong thunderstorm is able to develop with the potential to produce rainfall amounts of 0.4-0.9" in 10-30 minutes. A LOOK AHEAD: Drier air will move into the District on Saturday and result in generally dry conditions over the plains with a few isolated storms possible over the foothills and Palmer Divide. Temperatures will tack on a degree or two with highs over the plains in the upper 80's to around 90 degrees. LOCATION PRIME TIME 30-Minute Rainfall and % Probability Message Potential Plains Â Â Â Adams 200 PM TO 700 PM Trace (70%) to 0.2" (40%) to 0.5" (10%) LOW Arapahoe 200 PM TO 700 PM Trace (80%) to 0.2" (50%) to 0.5" (15%) LOW Boulder 200 PM TO 700 PM Trace (75%) to 0.2" (50%) to 0.5" (10%) LOW Broomfield 200 PM TO 700 PM Trace (75%) to 0.2" (50%) to 0.5" (10%) LOW Denver 200 PM TO 700 PM Trace (75%) to 0.2" (50%) to 0.5" (10%) LOW Douglas 200 PM TO 700 PM Trace (85%) to 0.2" (50%) to 0.5" (15%) LOW Jefferson 200 PM TO 700 PM Trace (75%) to 0.2" (50%) to 0.5" (10%) LOW Foothills above 6500ft Â Â Â Boulder 100 PM TO 700 PM Trace (90%) to 0.2" (60%) to 0.5" (20%) LOW Douglas 100 PM TO 700 PM Trace (90%) to 0.2" (60%) to 0.5" (20%) LOW Jefferson 100 PM TO 700 PM Trace (90%) to 0.2" (60%) to 0.5" (20%) LOW MONITOR NATIONAL WEATHER SERVICE FOR SEVERE WEATHER STATEMENTS. MHFD Flood Prediction Center: 303-458-0789 Â Â Â F2P2 Website [http://udfcd.org/Flash+Flood+Prediction+Program]

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Flash Flood Prediction Program

by f2p2＠udfcd.org

Time: 937 AM Thu August 25, 2022 Forecaster: Justin Brooks ------------------------- Heavy Precipitation Outlook Flash Flood Prediction Program ------------------------- MOSTLY SUNNY WITH A CHANCE FOR AFTERNOON SHOWERS/THUNDERSTORMS - Warm conditions continue as an upper-level disturbance over the Pacific Northwest transports a plume of moisture into the region, supporting increased thunderstorm activity today with highs reaching the upper 80âs to low 90âs this afternoon. - Initial storm development will occur along the higher terrain towards the west between noon and 2pm. These storms will likely move into the District between 1-3pm with the best chance for storm activity through 9pm. Current dew points in the mid 40's to around 50 should mix out during the morning into the low to mid 40's effectively limiting the amount of available, however, models suggest an uptick in surface moisture this afternoon resulting in a LOW chance for Message 1 issuance this afternoon. - Storm motions will generally be from the NNW to ESE between 10-15mph helping limit point rainfall amounts, however, additional storm development along outflow boundaries has the potential to produce slower moving, if not stationary storms at times. Storms today will also likely be very pulse like with generally a trace to 0.2" of rainfall, however a LOW threat today will see a storm produce a quick 0.5" in 10-15 minutes. Isolated higher amounts cannot be completely ruled out at this time if stronger storms are able to develop, although the threat will remain minimal today. STORM RAINFALL POTENTIAL AND DURATION: Typical rain showers/isolated thunderstorms will produce a trace to 0.2" of rainfall in 10-30 minutes. A moderate to strong rain showers/isolated thunderstorm could produce 0.2-0.5" in 10-30 minutes. WORST CASE SCENARIO: A slow-moving or anchored rain shower/isolated thunderstorm will have the potential to produce 0.5-1.5" in 45-75 minutes. A LOOK AHEAD: With the weekend on the horizon, the District will once again be in the cross hairs for an active weather pattern with storms chances likely Friday, Saturday and Sunday. Tomorrow will likely be the most active day with a good chance for afternoon and evening storm activity with at least a moderate chance for heavy rainfall at this time. Storm chances taper off slightly both Saturday and Sunday, although a LOW threat will likely remain for moderate to heavy afternoon rain showers/thunderstorms. LOCATION PRIME TIME 30-Minute Rainfall and % Probability Message Potential Plains Â Â Â Adams 200 PM TO 900 PM Trace (60%) to 0.2" (30%) to 0.5" (10%) LOW Arapahoe 200 PM TO 900 PM Trace (60%) to 0.2" (30%) to 0.5" (10%) LOW Boulder 200 PM TO 900 PM Trace (60%) to 0.2" (30%) to 0.5" (10%) LOW Broomfield 200 PM TO 900 PM Trace (60%) to 0.2" (30%) to 0.5" (10%) LOW Denver 200 PM TO 900 PM Trace (60%) to 0.2" (30%) to 0.5" (10%) LOW Douglas 200 PM TO 900 PM Trace (60%) to 0.2" (30%) to 0.5" (10%) LOW Jefferson 200 PM TO 900 PM Trace (60%) to 0.2" (30%) to 0.5" (10%) LOW Foothills above 6500ft Â Â Â Boulder 200 PM TO 900 PM Trace (70%) to 0.2" (40%) to 0.5" (15%) LOW Douglas 200 PM TO 900 PM Trace (70%) to 0.2" (40%) to 0.5" (15%) LOW Jefferson 200 PM TO 900 PM Trace (70%) to 0.2" (40%) to 0.5" (15%) LOW MONITOR NATIONAL WEATHER SERVICE FOR SEVERE WEATHER STATEMENTS. MHFD Flood Prediction Center: 303-458-0789 Â Â Â F2P2 Website [http://udfcd.org/Flash+Flood+Prediction+Program]

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Flash Flood Prediction Program

by f2p2＠udfcd.org

Time: 920 AM Wed August 24, 2022 Forecaster: Laura Smith ------------------------- Heavy Precipitation Outlook Flash Flood Prediction Program ------------------------- MOSTLY SUNNY WITH A MINIMAL CHANCE FOR ISOLATED SHOWERS AND THUNDERSTORMS - Northwesterly upper-level flow aloft will continue today, creating warm conditions with highs in the mid to upper 80's, dew points in the low to mid 40's, by this afternoon. Water vapor satellite reveals a dry airmass settled across the District today, limiting chances for shower and thunderstorm activity. - Like yesterday, storm motions will be slow; between 5-10mph from the NW to SE. PW values are expected to range from 0.6-0.7 inches with shower and thunderstorm activity mostly limited to complex terrain. However, a small chance remains for a few rain showers/isolated thunderstorms across the District between 1PM-7PM. - Overnight, skies will gradually clear with mild conditions expected. Lows will drop into the upper 50's to low 60's. STORM RAINFALL POTENTIAL AND DURATION: Rain showers today will produce a trace to 0.3 inches of rainfall in 10 to 30 minutes. WORST CASE SCENARIO: A slow-moving or anchored rain shower/thunderstorm will have the potential to produce 0.3-0.6 inches in 10 to 30 minutes. A LOOK AHEAD: On Thursday, an upper-level disturbance over the Pacific Northwest will transport a plume of moisture into the region, supporting increased thunderstorm activity. High temperatures will reach the upper 80s to around 90 degrees. On Friday, scattered showers and thunderstorms are likely during the afternoon and evening hours as temperatures reach the upper 80s. Saturday will be similar with highs in the upper 80s and a chance for isolated to widely scattered thunderstorms. LOCATION PRIME TIME 30-Minute Rainfall and % Probability Message Potential Plains Â Â Â Adams 100 PM TO 700 PM Trace (30%) to 0.2" (20%) to 0.3" (10%) NONE Arapahoe 100 PM TO 700 PM Trace (30%) to 0.2" (20%) to 0.3" (10%) NONE Boulder 100 PM TO 700 PM Trace (30%) to 0.2" (20%) to 0.3" (10%) NONE Broomfield 100 PM TO 700 PM Trace (30%) to 0.2" (20%) to 0.3" (10%) NONE Denver 100 PM TO 700 PM Trace (30%) to 0.2" (20%) to 0.3" (10%) NONE Douglas 100 PM TO 700 PM Trace (30%) to 0.2" (20%) to 0.3" (10%) NONE Jefferson 100 PM TO 700 PM Trace (30%) to 0.2" (20%) to 0.3" (10%) NONE Foothills above 6500ft Â Â Â Boulder 1200 PM TO 800 PM Trace (30%) to 0.2" (20%) to 0.4" (10%) NONE Douglas 1200 PM TO 800 PM Trace (30%) to 0.2" (20%) to 0.4" (10%) NONE Jefferson 1200 PM TO 800 PM Trace (30%) to 0.2" (20%) to 0.4" (10%) NONE MONITOR NATIONAL WEATHER SERVICE FOR SEVERE WEATHER STATEMENTS. MHFD Flood Prediction Center: 303-458-0789 Â Â Â F2P2 Website [http://udfcd.org/Flash+Flood+Prediction+Program]

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Flash Flood Prediction Program

by f2p2＠udfcd.org

Time: 927 AM Tue August 23, 2022 Forecaster: Laura Smith ------------------------- Heavy Precipitation Outlook Flash Flood Prediction Program ------------------------- MOSTLY SUNNY WITH A SLIGHT CHANCE FOR ISOLATED SHOWERS AND THUNDERSTORMS - Northwesterly upper-level flow aloft will continue today, creating warm conditions with highs in the mid to upper 80's, dew points in the mid to upper 40's, by this afternoon. A dryer airmass is moving over the District today, limiting chances for shower and thunderstorm activity. - PW values are expected to range from 0.5 to 0.7 inches, with most shower and thunderstorm activity expected across complex terrain. However, a small chance remains for a few rain showers/isolated thunderstorms across the District between 1PM-7PM. Like yesterday, storm motions will be slow, between 5-10mph from the NW to SE. - Overnight, skies will gradually clear with mild conditions expected. Lows will drop into the upper 50's to low 60's. STORM RAINFALL POTENTIAL AND DURATION: Rain showers today will produce a trace to 0.5 inches of rainfall in 10 to 30 minutes. WORST CASE SCENARIO: A slow-moving or anchored rain shower/thunderstorm will have the potential to produce 0.5-0.8 inches in 10 to 30 minutes. A LOOK AHEAD: High pressure ridging over the intermountain west will create warm conditions across the Front Range Urban Corridor throughout the week. Tomorrow will be similar to conditions today with highs in the mid 80s to around 90 degrees and a slight chance for isolated thunderstorm activity. By the end of the week, an upper-level disturbance over the Pacific Northwest will transport a plume of moisture into the region, supporting increased thunderstorm activity. On Thursday and Friday, scattered showers and thunderstorms are likely as temperatures reach the mid 80s. LOCATION PRIME TIME 30-Minute Rainfall and % Probability Message Potential Plains Â Â Â Adams 100 PM TO 700 PM Trace (30%) to 0.2" (20%) to 0.5" (10%) LOW Arapahoe 100 PM TO 700 PM Trace (30%) to 0.2" (20%) to 0.5" (10%) LOW Boulder 100 PM TO 700 PM Trace (30%) to 0.2" (20%) to 0.5" (10%) LOW Broomfield 100 PM TO 700 PM Trace (30%) to 0.2" (20%) to 0.5" (10%) LOW Denver 100 PM TO 700 PM Trace (30%) to 0.2" (20%) to 0.5" (10%) LOW Douglas 100 PM TO 700 PM Trace (30%) to 0.2" (20%) to 0.5" (10%) LOW Jefferson 100 PM TO 700 PM Trace (30%) to 0.2" (20%) to 0.5" (10%) LOW Foothills above 6500ft Â Â Â Boulder 100 PM TO 700 PM Trace (50%) to 0.2" (25%) to 0.5" (10%) LOW Douglas 100 PM TO 700 PM Trace (50%) to 0.2" (25%) to 0.5" (10%) LOW Jefferson 100 PM TO 700 PM Trace (50%) to 0.2" (25%) to 0.5" (10%) LOW MONITOR NATIONAL WEATHER SERVICE FOR SEVERE WEATHER STATEMENTS. MHFD Flood Prediction Center: 303-458-0789 Â Â Â F2P2 Website [http://udfcd.org/Flash+Flood+Prediction+Program]

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Flash Flood Prediction Program

by f2p2＠udfcd.org

Time: 734 PM Mon August 22, 2022 Forecaster: Brad Simmons ------------------------- Internal Message Status Flash Flood Prediction Program ------------------------- MESSAGE 1'S WILL BE ALLOWED TO EXPIRE - Message 1's issued for Adams, Arapahoe, Denver, Douglas and Jefferson Counties will be allowed to expire at 8:30 PM as the threat for heavy rainfall has ended for the day. - Conditions over the District are dry at this time and no meaningful precipitation is expected to develop for the remainder of the evening and overnight period. - Generally dry conditions are expected on Tuesday for most areas over the plains with isolated storms possible over the foothills and Palmer Divide. STORM RAINFALL POTENTIAL AND DURATION: No meaningful precipitation is expected, TR-0.1". COUNTY MESSAGE VALID TIMES PRIME TIME Jefferson County 1 100 PM TO 830 PM 200 PM TO 730 PM Douglas County 1 100 PM TO 830 PM 200 PM TO 730 PM Adams County 1 100 PM TO 830 PM 200 PM TO 730 PM Denver County 1 100 PM TO 830 PM 200 PM TO 730 PM DIA 1 100 PM TO 830 PM 200 PM TO 730 PM Arapahoe County 1 100 PM TO 830 PM 200 PM TO 730 PM the City of Aurora 1 100 PM TO 830 PM 200 PM TO 730 PM Arvada 1 100 PM TO 830 PM 200 PM TO 730 PM Wheat Ridge 1 100 PM TO 830 PM 200 PM TO 730 PM Lakewood 1 100 PM TO 830 PM 200 PM TO 730 PM MONITOR NATIONAL WEATHER SERVICE FOR SEVERE WEATHER STATEMENTS. MHFD Flood Prediction Center: 303-458-0789 Â Â Â F2P2 Website [http://udfcd.org/Flash+Flood+Prediction+Program]

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