SPSBOU
by EMWIN-Denver Regional
WWUS85 KBOU 282321
SPSBOU
Special Weather Statement
National Weather Service Denver CO
521 PM MDT Mon Aug 28 2023
COZ038-042-043-290000-
Central and South Weld County CO-Northeast Weld County CO-
Larimer County Below 6000 Feet/Northwest Weld County CO-
521 PM MDT Mon Aug 28 2023
...A strong thunderstorm will impact portions of central Weld County
through 600 PM MDT...
At 520 PM MDT, Doppler radar was tracking a strong thunderstorm 7
miles northwest of Briggsdale, or 26 miles northeast of Greeley,
moving southeast at 30 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...
Briggsdale.
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.
Torrential rainfall is also occurring with this storm and may lead to
localized flooding. Do not drive your vehicle through flooded
roadways.
&&
LAT...LON 4083 10436 4053 10412 4052 10415 4048 10415
4039 10442 4075 10457
TIME...MOT...LOC 2320Z 335DEG 25KT 4072 10442
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, 2 weeks
SPSBOU
by EMWIN-Denver Regional
WWUS85 KBOU 282219
SPSBOU
Special Weather Statement
National Weather Service Denver CO
419 PM MDT Mon Aug 28 2023
COZ038-282245-
Larimer County Below 6000 Feet/Northwest Weld County CO-
419 PM MDT Mon Aug 28 2023
...A strong thunderstorm will impact portions of east central Larimer
County through 445 PM MDT...
At 419 PM MDT, Doppler radar was tracking a strong thunderstorm near
Fort Collins, moving southeast at 20 mph.
HAZARD...Wind gusts up to 50 mph and penny 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, northeastern Loveland, Windsor, and Timnath.
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.
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.
&&
LAT...LON 4056 10494 4047 10494 4043 10509 4064 10517
4068 10507
TIME...MOT...LOC 2219Z 328DEG 16KT 4060 10509
MAX HAIL SIZE...0.75 IN
MAX WIND GUST...50 MPH
$$
HEAVENER
8 months, 2 weeks
FFWBOU
by EMWIN-Denver Regional
WGUS55 KBOU 282135
FFWBOU
COC069-290030-
/O.NEW.KBOU.FF.W.0077.230828T2135Z-230829T0030Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Denver CO
335 PM MDT Mon Aug 28 2023
The National Weather Service in Denver has issued a
* Flash Flood Warning for...
South Central Larimer County in north central Colorado...
* Until 630 PM MDT.
* At 335 PM MDT, Doppler radar indicated thunderstorms producing
heavy rain across the warned area. Between 1 and 1.2 inches of
rain have fallen. The expected rainfall rate is 1.25 to 1.5 inches
in 1 hour. Additional rainfall amounts of 0.5 to 1 inch are
possible in the warned area. Flash flooding is ongoing or expected
to begin shortly.
HAZARD...Flash flooding caused by thunderstorms.
SOURCE...Radar.
IMPACT...Flash flooding of small creeks and streams, gulches,
roads, and poor drainage and low-lying areas.
* Some locations that will experience flash flooding include...
Estes Park and Glen Haven.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Move to higher ground now. Act quickly to protect your life.
&&
LAT...LON 4048 10556 4044 10559 4040 10556 4038 10549
4039 10542 4043 10540 4046 10545
FLASH FLOOD...RADAR INDICATED
EXPECTED RAINFALL RATE...1.25-1.5 INCHES IN 1 HOUR
$$
HEAVENER
8 months, 2 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
$$
HEAVENER
8 months, 2 weeks
SPSBOU
by EMWIN-Denver Regional
WWUS85 KBOU 282022
SPSBOU
Special Weather Statement
National Weather Service Denver CO
222 PM MDT Mon Aug 28 2023
COZ035-039-282100-
Boulder And Jefferson Counties Below 6000 Feet/West Broomfield County
CO-Larimer and Boulder Counties Between 6000 and 9000 Feet CO-
222 PM MDT Mon Aug 28 2023
...A strong thunderstorm will impact portions of northeastern Boulder
County through 300 PM MDT...
At 222 PM MDT, Doppler radar was tracking a strong thunderstorm over
Allenspark, or 33 miles southwest of Fort Collins, moving southeast
at 10 mph.
HAZARD...Winds in excess of 40 mph and half inch hail.
SOURCE...Radar indicated.
IMPACT...Gusty winds could knock down tree limbs and blow around
unsecured objects. Minor damage to outdoor objects is
possible.
Locations impacted include...
Jamestown, Raymond, Allenspark, Gold Hill, Sunshine, Summerville,
Peaceful Valley, and Wallstreet.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
If outdoors, consider seeking shelter inside a building.
Torrential rainfall is also occurring with this storm and may lead to
localized flooding. Do not drive your vehicle through flooded
roadways.
This storm may intensify, so be certain to monitor local radio
stations and available television stations for additional information
and possible warnings from the National Weather Service.
&&
LAT...LON 4018 10520 4001 10543 4007 10547 4008 10547
4014 10551 4015 10550 4016 10550 4018 10549
4018 10551 4017 10553 4019 10554 4021 10556
4025 10547
TIME...MOT...LOC 2022Z 311DEG 8KT 4019 10548
MAX HAIL SIZE...0.50 IN
MAX WIND GUST...40 MPH
$$
HEAVENER
8 months, 2 weeks
FLSBOU
by EMWIN-Denver Regional
WGUS85 KBOU 282017
FLSBOU
Flood Advisory
National Weather Service Denver CO
217 PM MDT Mon Aug 28 2023
COC069-282315-
/O.NEW.KBOU.FA.Y.0160.230828T2017Z-230828T2315Z/
/00000.N.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Larimer CO-
217 PM MDT Mon Aug 28 2023
...FLOOD ADVISORY IN EFFECT UNTIL 515 PM MDT THIS AFTERNOON...
* WHAT...Small stream flooding caused by excessive rainfall is
expected.
* WHERE...A portion of north central Colorado, including the
following county, Larimer.
* WHEN...Until 515 PM MDT.
* IMPACTS...Minor flooding in low-lying and poor drainage areas.
* ADDITIONAL DETAILS...
- At 217 PM MDT, Doppler radar indicated heavy rain due to
thunderstorms. This will cause small stream flooding. Between
0.5 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...
mainly rural areas of Northwestern Larimer County
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
&&
LAT...LON 4065 10551 4065 10545 4069 10544 4071 10550
4071 10553 4071 10557 4069 10558 4068 10555
4067 10554 4067 10551 4067 10550
$$
HEAVENER
8 months, 2 weeks
FLSBOU
by EMWIN-Denver Regional
WGUS85 KBOU 281921
FLSBOU
Flood Advisory
National Weather Service Denver CO
121 PM MDT Mon Aug 28 2023
COC069-282230-
/O.NEW.KBOU.FA.Y.0159.230828T1921Z-230828T2230Z/
/00000.N.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Larimer CO-
121 PM MDT Mon Aug 28 2023
...FLOOD ADVISORY IN EFFECT UNTIL 430 PM MDT THIS AFTERNOON...
* WHAT...Small stream flooding caused by excessive rainfall is
expected.
* WHERE...A portion of the Cameron Peak burned area, north of Glen
Haven.
* WHEN...Until 430 PM MDT.
* IMPACTS...Minor flooding in low-lying and poor drainage areas.
* ADDITIONAL DETAILS...
- At 121 PM MDT, Doppler radar indicated heavy rain due to
thunderstorms. This will cause small stream flooding.
- Miller Fork is the most likely place to experience minor
flooding.
- Some locations that will experience flooding include...
mainly rural areas of Central Larimer County
- This includes the following additional locations...
Crystal Mountain, The Retreat and Storm Mountain.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
Heavy Rainfall will cause minor flooding of creeks and streams,
roads and roadside culverts in the affected part of the Cameron Peak
burn area. The heavy rains could also trigger rock slides or debris
flows.
&&
LAT...LON 4054 10545 4048 10548 4045 10541 4047 10533
4051 10531 4054 10540
$$
HEAVENER
8 months, 2 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