Alert archive / Colorado / Severe Thunderstorm Warnings in 2019
Severe Thunderstorm Warning 188, NWS Denver/Boulder, CO
NWS Denver/Boulder, CO issued this severe thunderstorm warning at Jul 29, 2019, 3:33 PM MDT for Douglas County, Colorado. It was in force for 42 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
- Jul 29, 2019, 3:33 PM MDT (21:33 UTC)
- Expired
- Jul 29, 2019, 4:15 PM MDT
- In force
- 42 min
- Issued by
- NWS Denver/Boulder, CO
- Area
- Storm-based polygon
- Hail
- 1.25 in
- Wind
- 50.0 mph
County Douglas County, CO
The radar
The Denver radar (KFTG), 61 km from the middle of the area, began a volume at 21:36 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
Denver, CO (KDNR), launched 12:00Z, 9.6 hours before the alert went out and 158 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
- 3 J/kg
- Mixed-layer CIN
- -363 J/kg
- Mixed-layer LCL
- 2202 m above ground
- 0-6 km bulk shear
- 29 kt
- 0-1 km storm-relative helicity
- 3 m²/s²
- 0-3 km storm-relative helicity
- -18 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 Jul 29, 2:51 PM MDT, 42 minutes earlier.
Area forecast discussion, Jul 29, 2:51 PM MDT, 42 minutes before
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</html>Hazardous weather outlook, Jul 29, 11:02 AM MDT, 4 hours 31 minutes before
Hazardous Weather Outlook National Weather Service Denver/Boulder CO 1102 AM MDT Mon Jul 29 2019 COZ030>051-301715- 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- 1102 AM MDT Mon Jul 29 2019 This hazardous weather outlook is for northeast and north central Colorado. .DAY ONE...Today and Tonight There will be a chance of afternoon thunderstorms mainly across the Palmer Divide and over the far eastern plains. A few storms could be severe with large hail and wind gusts to 60 mph. Elsewhere thunderstorm coverage over the rest of the area will be more isolated. .DAYS TWO THROUGH SEVEN...Tuesday through Sunday Increasing moisture will bring a better chance for thunderstorms starting Tuesday and continue through Thursday. Heavy rain will be the main threat for the mid week storms. Temperatures will continue to be on the warm side with highs in the mid-90s Tuesday and Wednesday. .SPOTTER INFORMATION STATEMENT... Spotter activation will not be needed today or tonight.
In the hours before
Special weather statement, Jul 29, 1:46 PM MDT, 1 hour 47 minutes before
Special Weather Statement
National Weather Service Denver CO
146 PM MDT Mon Jul 29 2019
COZ040-041-292030-
Elbert/Central and East Douglas Counties Above 6000 Feet CO-
North Douglas County Below 6000 Feet/Denver/West Adams and Arapahoe
Counties/East Broomfield County CO-
146 PM MDT Mon Jul 29 2019
...SIGNIFICANT WEATHER ADVISORY FOR NORTHEASTERN DOUGLAS COUNTY UNTIL
230 PM MDT...
At 145 PM MDT, Doppler radar was tracking a strong thunderstorm over
Louviers, or 18 miles south of Denver, moving east at 25 mph.
Penny size hail and winds in excess of 30 mph will be possible with
this storm.
Locations impacted include...
Southern Highlands Ranch, Castle Rock, southern Parker, Roxborough
Park, Castle Pines, The Pinery, Louviers, Sedalia and Franktown.
LAT...LON 3938 10495 3941 10495 3941 10497 3944 10501
3944 10502 3946 10503 3947 10504 3945 10505
3945 10507 3946 10509 3948 10511 3949 10509
3954 10507 3949 10469 3929 10473
TIME...MOT...LOC 1945Z 292DEG 20KT 3948 10503
DANKERSLocal storm report, Jul 29, 2:29 PM MDT, 1 hour 4 minutes before
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</html>Local storm report, Jul 29, 2:58 PM MDT, 35 minutes before
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</html>The office that day
Everything else NWS Denver/Boulder, CO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 29, 1:46 PM MDT | Special Weather Statement | BOU | Douglas | 44 min |
| Jul 29, 2:28 PM MDT | Severe Thunderstorm Warning | BOU | Logan, Phillips | 32 min |
| Jul 29, 4:23 PM MDT | Special Weather Statement | BOU | Logan | 52 min |
Nearby
Severe Thunderstorm Warnings in Colorado, 2019Every severe thunderstorm warning in 2019
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.