SPSBOU
by EMWIN-Denver Regional
WWUS85 KBOU 290150
SPSBOU
Special Weather Statement
National Weather Service Denver CO
750 PM MDT Mon Aug 28 2023
COZ036-039-040-290215-
Boulder And Jefferson Counties Below 6000 Feet/West Broomfield County
CO-
North Douglas County Below 6000 Feet/Denver/West Adams and Arapahoe
Counties/East Broomfield County CO-
Jefferson and West Douglas Counties Above 6000 Feet/Gilpin/Clear
Creek/Northeast Park Counties Below 9000 Feet CO-
750 PM MDT Mon Aug 28 2023
...A strong thunderstorm will impact portions of northwestern Douglas
and central Jefferson Counties through 815 PM MDT...
At 749 PM MDT, Doppler radar was tracking a strong thunderstorm 6
miles east of Conifer, or 20 miles southwest of Denver, moving
southeast at 20 mph.
HAZARD...Winds in excess of 40 mph and half inch hail.
SOURCE...Radar indicated.
IMPACT...Gusty winds could knock down tree limbs and blow around
unsecured objects. Minor damage to outdoor objects is
possible.
Locations impacted include...
Western Highlands Ranch, southwestern Littleton, Roxborough Park,
Chatfield Reservoir, Louviers, Sprucewood, South Platte, and Sedalia.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
If outdoors, consider seeking shelter inside a building.
&&
LAT...LON 3931 10522 3953 10529 3958 10507 3948 10497
3938 10497
TIME...MOT...LOC 0149Z 334DEG 18KT 3950 10519
MAX HAIL SIZE...0.50 IN
MAX WIND GUST...40 MPH
$$
HEAVENER
8 months, 2 weeks
SPSBOU
by EMWIN-Denver Regional
WWUS85 KBOU 290112
SPSBOU
Special Weather Statement
National Weather Service Denver CO
712 PM MDT Mon Aug 28 2023
COZ039-043-290200-
Central and South Weld County CO-
Boulder And Jefferson Counties Below 6000 Feet/West Broomfield County
CO-
712 PM MDT Mon Aug 28 2023
...A strong thunderstorm will impact portions of southwestern Weld
and northeastern Boulder Counties through 800 PM MDT...
At 712 PM MDT, Doppler radar was tracking a strong thunderstorm near
Berthoud, or 19 miles southwest of Greeley, moving southeast at 30
mph.
HAZARD...Winds in excess of 40 mph and half inch hail.
SOURCE...Radar indicated.
IMPACT...Gusty winds could knock down tree limbs and blow around
unsecured objects. Minor damage to outdoor objects is
possible.
Locations impacted include...
Longmont, Erie, Firestone, Johnstown, Frederick, Fort Lupton,
Berthoud, Lochbuie, Dacono, Mead, Platteville, and Hudson.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
If outdoors, consider seeking shelter inside a building.
&&
LAT...LON 4003 10458 4000 10496 4004 10496 4004 10498
4003 10497 4002 10500 4001 10499 4000 10506
4025 10520 4026 10518 4026 10506 4034 10505
4035 10502 4035 10500
TIME...MOT...LOC 0112Z 324DEG 24KT 4025 10505
MAX HAIL SIZE...0.50 IN
MAX WIND GUST...40 MPH
$$
HEAVENER
8 months, 2 weeks
SPSBOU
by EMWIN-Denver Regional
WWUS85 KBOU 290059
SPSBOU
Special Weather Statement
National Weather Service Denver CO
659 PM MDT Mon Aug 28 2023
COZ036-039>041-045-290145-
Elbert/Central and East Douglas Counties Above 6000 Feet CO-
Boulder And Jefferson Counties Below 6000 Feet/West Broomfield County
CO-Central and East Adams and Arapahoe Counties CO-
North Douglas County Below 6000 Feet/Denver/West Adams and Arapahoe
Counties/East Broomfield County CO-
Jefferson and West Douglas Counties Above 6000 Feet/Gilpin/Clear
Creek/Northeast Park Counties Below 9000 Feet CO-
659 PM MDT Mon Aug 28 2023
...Strong outflow winds will impact portions of northeastern
Douglas, northwestern Elbert, western Arapahoe, Broomfield, Denver,
northern Jefferson and southwestern Adams Counties through 745 PM
MDT...
At 657 PM MDT, Doppler radar was tracking strong outflow winds along
a line extending from 3 miles north of Thornton to Aurora to 5 miles
southeast of Watkins to 4 miles south of Strasburg, or along a line
extending from 34 miles south of Greeley to 10 miles east of Denver
to 57 miles north of Colorado Springs to 43 miles northwest of Limon.
Movement was southwest at 35 mph.
HAZARD...Wind gusts of 50 to 55 mph.
SOURCE...Radar indicated.
IMPACT...Gusty winds could knock down tree limbs and blow around
unsecured objects.
Locations impacted include...
Denver, Aurora, Lakewood, Thornton, Arvada, Westminster, Centennial,
Broomfield, Highlands Ranch, northern Castle Rock, southwestern
Commerce City, Parker, Littleton, Northglenn, Englewood, Wheat Ridge,
Golden, Greenwood Village, Evergreen, and Federal Heights.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Prepare for sudden gusty winds. Secure loose objects and move to a
safe shelter inside a building or vehicle.
If outdoors, consider seeking shelter inside a building.
&&
LAT...LON 3940 10499 3949 10521 3973 10540 4000 10502
3978 10468 3971 10449 3970 10417 3956 10434
3956 10447 3954 10447 3954 10445 3953 10444
3954 10442 3951 10441 3934 10462
TIME...MOT...LOC 0057Z 050DEG 32KT 3996 10498 3974 10475 3968 10456
3967 10433
MAX HAIL SIZE...0.00 IN
MAX WIND GUST...55 MPH
$$
HEAVENER
8 months, 2 weeks
SPSBOU
by EMWIN-Denver Regional
WWUS85 KBOU 282234
SPSBOU
Special Weather Statement
National Weather Service Denver CO
434 PM MDT Mon Aug 28 2023
COZ035-038-282300-
Larimer and Boulder Counties Between 6000 and 9000 Feet CO-
Larimer County Below 6000 Feet/Northwest Weld County CO-
434 PM MDT Mon Aug 28 2023
...Strong thunderstorms will impact portions of northwestern Weld and
northeastern Larimer Counties through 500 PM MDT...
At 433 PM MDT, Doppler radar was tracking strong thunderstorms along
a line extending from 7 miles southwest of Hillsdale to 10 miles
southeast of South Greeley to 4 miles north of Rockport to 8 miles
west of Natural Fort, or along a line extending from 11 miles east of
Cheyenne to 68 miles northwest of Fort Morgan to 37 miles north of
Greeley to 26 miles north of Fort Collins. Movement was southeast at
30 mph.
HAZARD...Wind gusts up to 50 mph.
SOURCE...Radar indicated.
IMPACT...Gusty winds could knock down tree limbs and blow around
unsecured objects.
Locations impacted include...
Carr, Rockport, Hereford, and Natural Fort.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
If outdoors, consider seeking shelter inside a building.
&&
LAT...LON 4098 10428 4096 10428 4080 10451 4075 10474
4072 10511 4100 10522 4100 10430
TIME...MOT...LOC 2233Z 335DEG 26KT 4113 10458 4102 10464 4096 10482
4094 10509
MAX HAIL SIZE...0.00 IN
MAX WIND GUST...50 MPH
$$
HEAVENER
8 months, 3 weeks
SPSBOU
by EMWIN-Denver Regional
WWUS85 KBOU 282108
SPSBOU
Special Weather Statement
National Weather Service Denver CO
308 PM MDT Mon Aug 28 2023
COZ033-035-282145-
Larimer and Boulder Counties Between 6000 and 9000 Feet CO-
South and East Jackson/Larimer/North and Northeast Grand/Northwest
Boulder Counties Above 9000 Feet CO-
308 PM MDT Mon Aug 28 2023
...A strong thunderstorm will impact portions of south central
Larimer County through 345 PM MDT...
At 308 PM MDT, Doppler radar was tracking a strong thunderstorm 4
miles west of Glen Haven, or 26 miles west of Fort Collins, moving
southeast at 20 mph.
HAZARD...Winds in excess of 40 mph and half inch hail.
SOURCE...Radar indicated.
IMPACT...Gusty winds could knock down tree limbs and blow around
unsecured objects. Minor damage to outdoor objects is
possible.
Locations impacted include...
Estes Park, Glen Haven, and Drake.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
If outdoors, consider seeking shelter inside a building.
Torrential rainfall is also occurring with this storm and may lead to
localized flooding. Do not drive your vehicle through flooded
roadways.
This storm may intensify, so be certain to monitor local radio
stations and available television stations for additional information
and possible warnings from the National Weather Service.
&&
LAT...LON 4044 10564 4053 10556 4042 10530 4031 10544
4038 10557
TIME...MOT...LOC 2108Z 304DEG 17KT 4045 10554
MAX HAIL SIZE...0.50 IN
MAX WIND GUST...40 MPH
$$
HEAVENER
8 months, 3 weeks
FLSBOU
by EMWIN-Denver Regional
WGUS85 KBOU 282041
FLSBOU
Flood Advisory
National Weather Service Denver CO
241 PM MDT Mon Aug 28 2023
COC013-282345-
/O.NEW.KBOU.FA.Y.0161.230828T2041Z-230828T2345Z/
/00000.N.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Boulder CO-
241 PM MDT Mon Aug 28 2023
...FLOOD ADVISORY IN EFFECT UNTIL 545 PM MDT THIS AFTERNOON...
* WHAT...Small stream flooding caused by excessive rainfall is
expected.
* WHERE...A portion of northeast Colorado, including the following
county, Boulder.
* WHEN...Until 545 PM MDT.
* IMPACTS...Minor flooding in low-lying and poor drainage areas.
* ADDITIONAL DETAILS...
- At 241 PM MDT, Doppler radar indicated heavy rain due to
thunderstorms. This will cause small stream flooding. Between
0.7 and 1 inch of rain has fallen.
- Additional rainfall amounts of 0.3 to 0.6 inches are
expected over the area. This additional rain will result in
minor flooding.
- Some locations that will experience flooding include...
Raymond, Allenspark, Meeker Park and Riverside.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
&&
LAT...LON 4026 10549 4026 10545 4023 10538 4016 10539
4015 10547 4016 10555 4024 10555 4026 10554
$$
HEAVENER
8 months, 3 weeks
SPSBOU
by EMWIN-Denver Regional
WWUS85 KBOU 282022
SPSBOU
Special Weather Statement
National Weather Service Denver CO
222 PM MDT Mon Aug 28 2023
COZ035-039-282100-
Boulder And Jefferson Counties Below 6000 Feet/West Broomfield County
CO-Larimer and Boulder Counties Between 6000 and 9000 Feet CO-
222 PM MDT Mon Aug 28 2023
...A strong thunderstorm will impact portions of northeastern Boulder
County through 300 PM MDT...
At 222 PM MDT, Doppler radar was tracking a strong thunderstorm over
Allenspark, or 33 miles southwest of Fort Collins, moving southeast
at 10 mph.
HAZARD...Winds in excess of 40 mph and half inch hail.
SOURCE...Radar indicated.
IMPACT...Gusty winds could knock down tree limbs and blow around
unsecured objects. Minor damage to outdoor objects is
possible.
Locations impacted include...
Jamestown, Raymond, Allenspark, Gold Hill, Sunshine, Summerville,
Peaceful Valley, and Wallstreet.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
If outdoors, consider seeking shelter inside a building.
Torrential rainfall is also occurring with this storm and may lead to
localized flooding. Do not drive your vehicle through flooded
roadways.
This storm may intensify, so be certain to monitor local radio
stations and available television stations for additional information
and possible warnings from the National Weather Service.
&&
LAT...LON 4018 10520 4001 10543 4007 10547 4008 10547
4014 10551 4015 10550 4016 10550 4018 10549
4018 10551 4017 10553 4019 10554 4021 10556
4025 10547
TIME...MOT...LOC 2022Z 311DEG 8KT 4019 10548
MAX HAIL SIZE...0.50 IN
MAX WIND GUST...40 MPH
$$
HEAVENER
8 months, 3 weeks
SPSBOU
by EMWIN-Denver Regional
WWUS85 KBOU 272218
SPSBOU
Special Weather Statement
National Weather Service Denver CO
418 PM MDT Sun Aug 27 2023
COZ033-035-272300-
Larimer and Boulder Counties Between 6000 and 9000 Feet CO-
South and East Jackson/Larimer/North and Northeast Grand/Northwest
Boulder Counties Above 9000 Feet CO-
418 PM MDT Sun Aug 27 2023
...A strong thunderstorm will impact portions of northwestern Larimer
County through 500 PM MDT...
At 417 PM MDT, Doppler radar was tracking a strong thunderstorm 8
miles north of Four Corners, or 26 miles southwest of Laramie, moving
southeast at 25 mph.
HAZARD...Wind gusts up to 50 mph, nickel size hail and brief heavy
rain.
SOURCE...Radar indicated.
IMPACT...Gusty winds could knock down tree limbs and blow around
unsecured objects. Minor damage to outdoor objects is
possible.
Locations impacted include...
Four Corners.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
If outdoors, consider seeking shelter inside a building.
Frequent cloud to ground lightning is occurring with this storm.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.
This storm may intensify, so be certain to monitor local radio
stations and available television stations for additional information
and possible warnings from the National Weather Service.
&&
LAT...LON 4100 10574 4082 10557 4081 10591 4099 10600
4100 10576
TIME...MOT...LOC 2217Z 321DEG 21KT 4099 10586
MAX HAIL SIZE...0.88 IN
MAX WIND GUST...50 MPH
$$
COOPER
8 months, 3 weeks
SPSBOU
by EMWIN-Denver Regional
WWUS85 KBOU 272133
SPSBOU
Special Weather Statement
National Weather Service Denver CO
333 PM MDT Sun Aug 27 2023
COZ038-039-043-272215-
Central and South Weld County CO-
Boulder And Jefferson Counties Below 6000 Feet/West Broomfield County
CO-Larimer County Below 6000 Feet/Northwest Weld County CO-
333 PM MDT Sun Aug 27 2023
...Strong thunderstorms will impact portions of west central Weld,
southeastern Larimer and northeastern Boulder Counties through 415 PM
MDT...
At 330 PM MDT, Doppler radar was tracking strong thunderstorms along
a line extending from 4 miles southwest of Timnath to near Cedar
Cove, or along a line extending from 5 miles south of Fort Collins to
49 miles north of Denver. Movement was southeast at 20 mph.
HAZARD...Winds in excess of 35 mph, hail up to nickel, locally heavy
rainfall and minor street flooding.
SOURCE...Radar indicated.
IMPACT...Gusty winds could knock down tree limbs and blow around
unsecured objects. Minor damage to outdoor objects is
possible.
Locations impacted include...
South Fort Collins, Loveland, Windsor, Johnstown, Berthoud, Mead,
Lyons, Timnath, Carter Lake, and Masonville.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
If outdoors, consider seeking shelter inside a building.
Heavy rainfall is also occurring with these storms and may lead to
localized flooding. Do not drive your vehicle through flooded
roadways.
&&
LAT...LON 4054 10493 4022 10488 4021 10528 4030 10529
4031 10527 4030 10525 4038 10525 4040 10524
4039 10523 4041 10523 4042 10524 4045 10524
4044 10523 4047 10524
TIME...MOT...LOC 2130Z 321DEG 21KT 4048 10503 4040 10527
MAX HAIL SIZE...0.88 IN
MAX WIND GUST...30 MPH
$$
COOPER
8 months, 3 weeks
SPSBOU
by EMWIN-Denver Regional
WWUS85 KBOU 272046
SPSBOU
Special Weather Statement
National Weather Service Denver CO
246 PM MDT Sun Aug 27 2023
COZ035-038-272130-
Larimer and Boulder Counties Between 6000 and 9000 Feet CO-
Larimer County Below 6000 Feet/Northwest Weld County CO-
246 PM MDT Sun Aug 27 2023
...Strong thunderstorms will impact portions of southeastern Larimer
County through 330 PM MDT...
At 243 PM MDT, Doppler radar was tracking strong thunderstorms along
a line extending from Buckhorn Mountain to 4 miles west of
Wellington, or along a line extending from 63 miles north of Denver
to 8 miles north of Fort Collins. Movement was south at 20 mph.
HAZARD...Winds in excess of 30 mph and nickel size hail.
SOURCE...Radar indicated.
IMPACT...Gusty winds could knock down tree limbs and blow around
unsecured objects. Minor damage to outdoor objects is
possible.
Locations impacted include...
Fort Collins, northern Loveland, Timnath, Stove Prairie, Masonville,
Teds Place, Bellvue, Cedar Cove, Buckhorn Mountain, and Drake. The
eastern portion of the Cameron Peak burn scar north of Drake and
Masonville will also be impacted by these storms.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
If outdoors, consider seeking shelter inside a building.
Locally heavy rainfall is also occurring with these storms and may
lead to localized flooding, especially in the Cameron Peak burn
scar. Do not drive your vehicle through flooded roadways.
These storms may intensify, so be certain to monitor local radio
stations and available television stations for additional information
and possible warnings from the National Weather Service.
&&
LAT...LON 4071 10504 4049 10498 4039 10534 4061 10539
TIME...MOT...LOC 2043Z 343DEG 16KT 4060 10532 4068 10508
MAX HAIL SIZE...0.75 IN
MAX WIND GUST...30 MPH
$$
COOPER
8 months, 3 weeks