Alert archive / Colorado / Severe Thunderstorm Warnings in 2020
Severe Thunderstorm Warning 195, NWS Denver/Boulder, CO
NWS Denver/Boulder, CO issued this severe thunderstorm warning at Aug 5, 2020, 4:45 PM MDT for Morgan County, Colorado. It was in force for 45 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 5, 2020, 4:45 PM MDT (22:45 UTC)
- Expired
- Aug 5, 2020, 5:30 PM MDT
- In force
- 45 min
- Issued by
- NWS Denver/Boulder, CO
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 60.0 mph
County Morgan County, CO
The radar
The Denver radar (KFTG), 82 km from the middle of the area, began a volume at 22:47 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 watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Aug 5, 1:26 PM MDT | Severe Thunderstorm Watch | SPC | 8 hr |
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 5, 1:36 PM MDT, 3 hours 9 minutes earlier.
Area forecast discussion, Aug 5, 1:36 PM MDT, 3 hours 9 minutes before
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</html>Hazardous weather outlook, Aug 5, 10:36 AM MDT, 6 hours 9 minutes before
Hazardous Weather Outlook National Weather Service Denver/Boulder CO 1036 AM MDT Wed Aug 5 2020 COZ030>051-061645- 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- 1036 AM MDT Wed Aug 5 2020 This hazardous weather outlook is for northeast and north central Colorado. .DAY ONE...Today and Tonight Scattered thunderstorms will develop by early afternoon in the foothills and along the I-25 corridor. These storms will then move east southeast across the plains by late afternoon into the early evening hours. A few severe thunderstorms will occur and may produce hail up to 2 inches in diameter along with wind gusts to 70 mph. Although the tornado threat is low, an isolated weak tornado can't be ruled out. Otherwise, scattered showers and thunderstorms over the higher terrain may produce wind gusts to 50 mph along with some small hail. .DAYS TWO THROUGH SEVEN...Thursday through Tuesday Scattered late day showers and thunderstorms are forecast for Thursday. A few of the storms may become severe, with the best chances for severe storms on the eastern plains, east of the I-25 urban corridor. Friday through the weekend will be warm and dry, then isolated to widely scattered showers and thunderstorms, mainly over the high terrain, return early next week. .SPOTTER INFORMATION STATEMENT... Spotter activation will be needed after 2 PM.
In the hours before
Special weather statement, Aug 5, 2:15 PM MDT, 2 hours 30 minutes before
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</html>Local storm report, Aug 5, 3:27 PM MDT, 1 hour 18 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE DENVER CO
327 PM MDT WED AUG 5 2020
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0306 PM HAIL 2 SSE BYERS 39.68N 104.22W
08/05/2020 E1.75 INCH ARAPAHOE CO TRAINED SPOTTER
ALSO RECORDED A 46MPH WIND GUST. TIME
ESTIMATED BY RADAR.
&&Special weather statement, Aug 5, 3:39 PM MDT, 1 hour 6 minutes before
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</html>Special weather statement, Aug 5, 3:55 PM MDT, 50 minutes before
Special Weather Statement
National Weather Service Denver CO
355 PM MDT Wed Aug 5 2020
COZ035-036-039-052245-
Boulder And Jefferson Counties Below 6000 Feet/West Broomfield County
CO-Larimer and Boulder Counties Between 6000 and 9000 Feet CO-
Jefferson and West Douglas Counties Above 6000 Feet/Gilpin/Clear
Creek/Northeast Park Counties Below 9000 Feet CO-
355 PM MDT Wed Aug 5 2020
...SIGNIFICANT WEATHER ADVISORY FOR NORTHWESTERN JEFFERSON AND
SOUTHEASTERN BOULDER COUNTIES UNTIL 445 PM MDT...
At 354 PM MDT, Doppler radar was tracking a strong thunderstorm near
Pinecliffe, or 27 miles northwest of Denver, moving southeast at 5
mph.
Half inch hail and winds in excess of 40 mph will be possible with
this storm.
Locations impacted include...
Northwestern Arvada, southern Boulder, Louisville, Pinecliffe, Rocky
Flats and Eldorado Springs.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
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.
&&
A Severe Thunderstorm Watch remains in effect until 900 PM MDT for
central and northeastern Colorado.
LAT...LON 3986 10516 3986 10541 3989 10538 3991 10541
3991 10543 3988 10544 3988 10545 4001 10547
4002 10518
TIME...MOT...LOC 2154Z 304DEG 6KT 3996 10537
ENTREKINSpecial weather statement, Aug 5, 4:21 PM MDT, 24 minutes before
Special Weather Statement National Weather Service Denver CO 421 PM MDT Wed Aug 5 2020 COZ042-048-052300- Logan County CO-Northeast Weld County CO- 421 PM MDT Wed Aug 5 2020 ...SIGNIFICANT WEATHER ADVISORY FOR NORTHEASTERN WELD AND WESTERN LOGAN COUNTIES UNTIL 500 PM MDT... At 420 PM MDT, Doppler radar was tracking a strong thunderstorm 10 miles north of Stoneham, or 24 miles west of Sterling, moving east at 40 mph. Half inch hail and wind gusts up to 50 mph will be possible with this storm. Locations impacted include... Sterling, Iliff, Peetz, Stoneham, Proctor, Padroni, Westplains, Atwood, Logan Corners, North Sterling Reservoir, Pawnee Pass and Willard. PRECAUTIONARY/PREPAREDNESS ACTIONS... Prepare for sudden gusty winds. Secure loose objects and move to a safe shelter inside a building or vehicle. && A Severe Thunderstorm Watch remains in effect until 900 PM MDT for northeastern Colorado. LAT...LON 4063 10388 4099 10372 4097 10290 4045 10296 TIME...MOT...LOC 2220Z 285DEG 46KT 4075 10363 ENTREKIN
The office that day
Everything else NWS Denver/Boulder, CO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 4, 6:06 PM MDT | Severe Thunderstorm Warning | BOU | Elbert, Lincoln | 39 min |
| Aug 4, 6:17 PM MDT | Areal Flood Advisory | BOU | Weld | 88 min |
| Aug 4, 6:40 PM MDT | Severe Thunderstorm Warning | BOU | Adams, Denver | 23 min |
| Aug 4, 6:55 PM MDT | Special Weather Statement | BOU | Lincoln | 50 min |
| Aug 4, 7:09 PM MDT | Severe Thunderstorm Warning | BOU | Elbert, Lincoln | 51 min |
| Aug 4, 7:33 PM MDT | Severe Thunderstorm Warning | BOU | Elbert, Lincoln | 42 min |
| Aug 4, 8:04 PM MDT | Severe Thunderstorm Warning | BOU | Larimer | 41 min |
| Aug 4, 8:11 PM MDT | Severe Thunderstorm Warning | BOU | Lincoln | 49 min |
| Aug 4, 8:49 PM MDT | Special Weather Statement | BOU | Larimer | 41 min |
| Aug 5, 2:51 AM MDT | Special Weather Statement | BOU | Logan | 39 min |
| Aug 5, 3:23 AM MDT | Special Weather Statement | BOU | Logan | 52 min |
| Aug 5, 2:10 PM MDT | Severe Thunderstorm Warning | BOU | Arapahoe, Elbert | 50 min |
| Aug 5, 2:15 PM MDT | Special Weather Statement | BOU | Larimer | 45 min |
| Aug 5, 2:43 PM MDT | Severe Thunderstorm Warning | BOU | Adams, Arapahoe | 47 min |
| Aug 5, 3:32 PM MDT | Severe Thunderstorm Warning | BOU | Adams | 14 min |
| Aug 5, 3:39 PM MDT | Special Weather Statement | BOU | Weld | 51 min |
| Aug 5, 3:55 PM MDT | Special Weather Statement | BOU | Boulder | 50 min |
| Aug 5, 4:03 PM MDT | Severe Thunderstorm Warning | BOU | Boulder, Gilpin, Jefferson | 42 min |
| Aug 5, 4:21 PM MDT | Special Weather Statement | BOU | Logan | 39 min |
| Aug 5, 4:30 PM MDT | Severe Thunderstorm Warning | BOU | Logan, Weld | 45 min |
| Aug 5, 5:30 PM MDT | Severe Thunderstorm Warning | BOU | Morgan, Washington | 45 min |
| Aug 5, 5:41 PM MDT | Areal Flood Advisory | BOU | Morgan | 113 min |
| Aug 5, 5:58 PM MDT | Severe Thunderstorm Warning | BOU | Washington | 47 min |
Nearby
Severe Thunderstorm Warnings in Colorado, 2020Every severe thunderstorm warning in 2020
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; radar from the NEXRAD Level II archive.