Alert archive / Colorado / Severe Thunderstorm Warnings in 2024
Severe Thunderstorm Warning 282, NWS Denver/Boulder, CO
NWS Denver/Boulder, CO issued this severe thunderstorm warning at Aug 23, 2024, 5:54 PM MDT for Logan County, Washington County, Colorado. It was in force for 51 min. No storm report in the archive falls inside the area while it was in force.
The area
The counties it named.
The facts
- Issued
- Aug 23, 2024, 5:54 PM MDT (23:54 UTC)
- Expired
- Aug 23, 2024, 6:45 PM MDT
- In force
- 51 min
- Issued by
- NWS Denver/Boulder, CO
- Area
- Storm-based polygon
- Tornado
- Possible
- Hail
- 1.0 in
- Wind
- 60.0 mph
Counties Logan County, CO, Washington County, CO
The radar
The Denver radar (KFTG), 134 km from the middle of the area, began a volume at 23:54 UTC, the scan nearest the moment this went out.
Open the radar archive at this moment
The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.
The nearest sounding before it
N. Platte/Lee Bi, NE (KLBF), launched 12:00Z, 11.9 hours before the alert went out and 232 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.
- Mixed-layer CAPE
- 11 J/kg
- Mixed-layer CIN
- -269 J/kg
- Mixed-layer LCL
- 957 m above ground
- 0-6 km bulk shear
- 15 kt
- 0-1 km storm-relative helicity
- 7 m²/s²
- 0-3 km storm-relative helicity
- 43 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
What forecasters said that day
The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Denver/Boulder, CO wrote its last area forecast discussion before this severe thunderstorm warning went out at Aug 23, 5:37 PM MDT, 17 minutes earlier.
Area forecast discussion, Aug 23, 5:37 PM MDT, 17 minutes before
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</html>Hazardous weather outlook, Aug 23, 10:02 AM MDT, 7 hours 52 minutes before
Hazardous Weather Outlook National Weather Service Denver/Boulder CO 1002 AM MDT Fri Aug 23 2024 COZ030>051-241615- Jackson County Below 9000 Feet- West Jackson and West Grand Counties Above 9000 Feet- Grand and Summit Counties Below 9000 Feet- South and East Jackson/Larimer/North and Northeast Grand/ Northwest Boulder Counties Above 9000 Feet- South and Southeast Grand/West Central and Southwest Boulder/ Gilpin/Clear Creek/Summit/North and West Park Counties Above 9000 Feet-Larimer and Boulder Counties Between 6000 and 9000 Feet- Jefferson and West Douglas Counties Above 6000 Feet/Gilpin/Clear Creek/Northeast Park Counties Below 9000 Feet- Central and Southeast Park County- Larimer County Below 6000 Feet/Northwest Weld County- Boulder And Jefferson Counties Below 6000 Feet/West Broomfield County- North Douglas County Below 6000 Feet/Denver/West Adams and Arapahoe Counties/East Broomfield County- Elbert/Central and East Douglas Counties Above 6000 Feet- Northeast Weld County-Central and South Weld County-Morgan County- Central and East Adams and Arapahoe Counties- North and Northeast Elbert County Below 6000 Feet/North Lincoln County- Southeast Elbert County Below 6000 Feet/South Lincoln County- Logan County-Washington County-Sedgwick County-Phillips County- 1002 AM MDT Fri Aug 23 2024 This hazardous weather outlook is for northeast and north central Colorado. .DAY ONE...Today and Tonight There will be isolated thunderstorms that develop this afternoon. These storms will produce gusty winds up to 40 mph and one or two of these storms may produce severe wind gusts up to 60 mph over the far northeast plains. There is a limited chance that these storms produce flash flooding in the recent burn areas. .DAYS TWO THROUGH SEVEN...Saturday through Thursday Scattered afternoon and evening thunderstorms can be expected this weekend. The stronger storms will have potential to produce brief heavy rain and lightning, while almost all will produce gusty outflow winds and in some cases gusts to around 50 mph. There will be just a limited threat of flash flooding at most on the burn scars, as storms will be moving faster. Elevated fire weather conditions may develop across the foothills and adjacent plains this weekend due to breezy conditions. While there will be a chance of storms heading into the early and mid part of next week, overall coverage and intensity of the storms should be on the decline. .SPOTTER INFORMATION STATEMENT... Spotter activation will not be needed today or tonight.
In the hours before
Special weather statement, Aug 23, 3:35 PM MDT, 2 hours 19 minutes before
Special Weather Statement
National Weather Service Denver CO
335 PM MDT Fri Aug 23 2024
COZ040-043-045-232215-
Central and South Weld 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-
335 PM MDT Fri Aug 23 2024
...STRONG THUNDERSTORMS WILL IMPACT CENTRAL ARAPAHOE AND CENTRAL
ADAMS COUNTIES THROUGH 415 PM MDT...
At 334 PM MDT, Doppler radar was tracking strong thunderstorms
capable of producing a landspout tornado along a line extending from
4 miles southwest of Prospect Valley to 10 miles southeast of
Arapahoe Park, or along a line extending from 32 miles southeast of
Greeley to 25 miles southeast of Denver. Movement was east at 25 mph.
HAZARD...Landspouts and wind gusts of 50 to 55 mph.
SOURCE...Radar indicated.
IMPACT...Landspout tornadoes can damage mobile homes, roofs,
vehicles, and trees. Outdoor objects may be tossed about.
Gusty winds could knock down tree limbs and blow around
unsecured objects.
Locations impacted include...
Eastern Aurora, Bennett, Strasburg, Leader, Byers, and Manila
Village.
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.
If a tornado is spotted seek shelter inside a sturdy building.
&&
LAT...LON 4000 10415 4000 10403 3957 10410 3956 10447
3959 10450 3966 10450 3965 10452 3959 10453
3958 10454 3958 10455 3963 10458 4003 10451
4003 10415
TIME...MOT...LOC 2134Z 263DEG 22KT 4001 10446 3957 10452
LANDSPOUT...POSSIBLE
MAX HAIL SIZE...0.00 IN
MAX WIND GUST...55 MPH
RPKSpecial weather statement, Aug 23, 4:04 PM MDT, 1 hour 50 minutes before
Special Weather Statement
National Weather Service Denver CO
404 PM MDT Fri Aug 23 2024
COZ043-044-232230-
Central and South Weld County CO-Morgan County CO-
404 PM MDT Fri Aug 23 2024
...A STRONG THUNDERSTORM WILL IMPACT SOUTH CENTRAL WELD AND
SOUTHWESTERN MORGAN COUNTIES THROUGH 430 PM MDT...
At 403 PM MDT, Doppler radar was tracking a strong thunderstorm
capable of producing a landspout tornado 9 miles east of Roggen, or
23 miles west of Fort Morgan, moving northeast at 20 mph.
HAZARD...Landspouts and wind gusts of 50 to 55 mph.
SOURCE...Radar indicated.
IMPACT...Landspout tornadoes can damage mobile homes, roofs,
vehicles, and trees. Outdoor objects may be tossed about.
Gusty winds could knock down tree limbs and blow around
unsecured objects.
Locations impacted include...
Wiggins.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
If outdoors, consider seeking shelter inside a building.
If a tornado is spotted seek shelter inside a sturdy building.
&&
LAT...LON 4004 10423 4024 10429 4030 10405 4010 10399
TIME...MOT...LOC 2203Z 237DEG 19KT 4012 10421
LANDSPOUT...POSSIBLE
MAX HAIL SIZE...0.00 IN
MAX WIND GUST...55 MPH
RPKLocal storm report, Aug 23, 4:06 PM MDT, 1 hour 48 minutes before
Preliminary Local Storm Report...Summary
National Weather Service Denver CO
406 PM MDT Fri Aug 23 2024
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0335 PM Tornado 8 NE Strasburg 39.83N 104.21W
08/23/2024 Adams CO Public
Brief tornado. Location approximate.
0320 PM Tornado 5 SSE Bennett 39.69N 104.40W
08/23/2024 Arapahoe CO Public
Brief tornado, location approximate.
&&Special weather statement, Aug 23, 4:17 PM MDT, 1 hour 37 minutes before
Special Weather Statement
National Weather Service Denver CO
417 PM MDT Fri Aug 23 2024
COZ038-042-232245-
Northeast Weld County CO-
Larimer County Below 6000 Feet/Northwest Weld County CO-
417 PM MDT Fri Aug 23 2024
...A STRONG THUNDERSTORM WILL IMPACT NORTHEASTERN WELD COUNTY THROUGH
445 PM MDT...
At 416 PM MDT, Doppler radar was tracking a strong thunderstorm near
Grover, or 37 miles southwest of Kimball, moving northeast at 20 mph.
HAZARD...Wind gusts of 50 to 55 mph and penny size hail.
SOURCE...Radar indicated.
IMPACT...Gusty winds could knock down tree limbs and blow around
unsecured objects. Minor hail damage to vegetation is
possible.
Locations impacted include...
Grover, Pawnee Buttes, and Keota.
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 4075 10382 4067 10425 4093 10437 4100 10425
4100 10398
TIME...MOT...LOC 2216Z 233DEG 17KT 4085 10416
MAX HAIL SIZE...0.75 IN
MAX WIND GUST...55 MPH
RPKSpecial weather statement, Aug 23, 4:45 PM MDT, 1 hour 9 minutes before
Special Weather Statement
National Weather Service Denver CO
445 PM MDT Fri Aug 23 2024
COZ044-045-049-232315-
Washington County CO-Morgan County CO-
Central and East Adams and Arapahoe Counties CO-
445 PM MDT Fri Aug 23 2024
...STRONG THUNDERSTORMS WILL IMPACT MORGAN...WEST CENTRAL WASHINGTON
AND NORTHEASTERN ADAMS COUNTIES THROUGH 515 PM MDT...
At 445 PM MDT, Doppler radar was tracking strong thunderstorms
capable of producing a landspout tornado along a line extending from
8 miles southwest of New Raymer to 4 miles south of Shamrock, or
along a line extending from 23 miles northwest of Fort Morgan to 38
miles north of Limon. Movement was east at 20 mph.
HAZARD...Landspouts, wind gusts of 50 to 55 mph, and penny size
hail.
SOURCE...Radar indicated.
IMPACT...Landspout tornadoes can damage mobile homes, roofs,
vehicles, and trees. Outdoor objects may be tossed about.
Gusty winds could knock down tree limbs and blow around
unsecured objects.
Locations impacted include...
Fort Morgan, Brush, Wiggins, Log Lane Village, Gary, Shamrock,
Antelope Springs, Weldona, Twelve-Mile Corner, Jackson Reservoir,
Adena School, Adena, Goodrich, and Woodrow.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
If outdoors, consider seeking shelter inside a building.
If a tornado is spotted seek shelter inside a sturdy building.
&&
LAT...LON 3982 10348 3980 10397 4052 10414 4052 10364
TIME...MOT...LOC 2245Z 252DEG 17KT 4056 10398 3982 10384
LANDSPOUT...POSSIBLE
MAX HAIL SIZE...0.75 IN
MAX WIND GUST...55 MPH
RPKSpecial weather statement, Aug 23, 4:51 PM MDT, 1 hour 3 minutes before
Special Weather Statement
National Weather Service Denver CO
451 PM MDT Fri Aug 23 2024
COZ042-232315-
Northeast Weld County CO-
451 PM MDT Fri Aug 23 2024
...STRONG THUNDERSTORMS WILL IMPACT NORTHEASTERN WELD COUNTY THROUGH
515 PM MDT...
At 451 PM MDT, Doppler radar was tracking strong thunderstorms
capable of producing a landspout tornado along a line extending from
6 miles southwest of New Raymer to 8 miles east of Pawnee Buttes, or
along a line extending from 21 miles north of Fort Morgan to 31 miles
south of Kimball. Movement was northeast at 20 mph.
HAZARD...Landspouts, wind gusts of 50 to 55 mph, and penny size
hail.
SOURCE...Radar indicated.
IMPACT...Landspout tornadoes can damage mobile homes, roofs,
vehicles, and trees. Outdoor objects may be tossed about.
Gusty winds could knock down tree limbs and blow around
unsecured objects.
Locations impacted include...
Stoneham and New Raymer.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
If outdoors, consider seeking shelter inside a building.
If a tornado is spotted seek shelter inside a sturdy building.
&&
LAT...LON 4084 10362 4053 10361 4053 10397 4081 10396
TIME...MOT...LOC 2251Z 245DEG 19KT 4055 10392 4080 10381
LANDSPOUT...POSSIBLE
MAX HAIL SIZE...0.75 IN
MAX WIND GUST...55 MPH
RPKThe office that day
Everything else NWS Denver/Boulder, CO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 22, 8:29 PM MDT | Severe Thunderstorm Warning | BOU | Logan, Phillips, Washington | 22 min |
| Aug 22, 9:09 PM MDT | Areal Flood Advisory | BOU | Logan, Phillips, Washington | 3 hr |
| Aug 23, 1:23 PM MDT | Areal Flood Advisory | BOU | Larimer | 2 hr |
| Aug 23, 2:27 PM MDT | Special Weather Statement | BOU | Broomfield | 33 min |
| Aug 23, 2:57 PM MDT | Special Weather Statement | BOU | Denver | 33 min |
| Aug 23, 3:08 PM MDT | Special Weather Statement | BOU | Washington | 37 min |
| Aug 23, 3:35 PM MDT | Special Weather Statement | BOU | Adams, Arapahoe | 40 min |
| Aug 23, 4:04 PM MDT | Special Weather Statement | BOU | Morgan | 26 min |
| Aug 23, 4:17 PM MDT | Special Weather Statement | BOU | Weld | 28 min |
| Aug 23, 4:37 PM MDT | Severe Thunderstorm Warning | BOU | Weld | 38 min |
| Aug 23, 4:45 PM MDT | Special Weather Statement | BOU | Morgan | 30 min |
| Aug 23, 4:51 PM MDT | Special Weather Statement | BOU | Morgan | 24 min |
| Aug 23, 4:56 PM MDT | Severe Thunderstorm Warning | BOU | Weld | 34 min |
| Aug 23, 5:18 PM MDT | Severe Thunderstorm Warning | BOU | Logan, Weld | 42 min |
| Aug 23, 5:21 PM MDT | Severe Thunderstorm Warning | BOU | Morgan, Washington | 39 min |
Nearby
Severe Thunderstorm Warnings in Colorado, 2024Every severe thunderstorm warning in 2024
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.