Alert archive / Colorado / Severe Thunderstorm Warnings in 2023
Severe Thunderstorm Warning 293, NWS Denver/Boulder, CO
NWS Denver/Boulder, CO issued this severe thunderstorm warning at Jul 13, 2023, 4:31 PM MDT for Weld County, Colorado. It was in force for 29 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 13, 2023, 4:31 PM MDT (22:31 UTC)
- Expired
- Jul 13, 2023, 5:00 PM MDT
- In force
- 29 min
- Issued by
- NWS Denver/Boulder, CO
- Area
- Storm-based polygon
- Hail
- 1.5 in
- Wind
- 60.0 mph
County Weld County, CO
The radar
The Cheyenne radar (KCYS), 75 km from the middle of the area, began a volume at 22:34 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 |
|---|---|---|---|
| Jul 13, 1:49 PM MDT | Severe Thunderstorm Watch | SPC | 7 hr |
The nearest sounding before it
Grand Junction, CO (KGJT), launched 12:00Z, 10.5 hours before the alert went out and 385 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 3534 m above ground
- 0-6 km bulk shear
- 46 kt
- 0-1 km storm-relative helicity
- -29 m²/s²
- 0-3 km storm-relative helicity
- 33 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 13, 2:41 PM MDT, 1 hour 50 minutes earlier.
Area forecast discussion, Jul 13, 2:41 PM MDT, 1 hour 50 minutes before
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</html>Hazardous weather outlook, Jul 13, 11:11 AM MDT, 5 hours 20 minutes before
Hazardous Weather Outlook National Weather Service Denver/Boulder CO 1111 AM MDT Thu Jul 13 2023 COZ030>051-141715- 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- 1111 AM MDT Thu Jul 13 2023 This hazardous weather outlook is for northeast and north central Colorado. .DAY ONE...This Afternoon and Tonight Isolated showers and thunderstorms to develop this afternoon and evening over the mountains and plains. A few strong to severe storms are possible over the far eastern plains of Colorado with large hail, damaging winds and even a possible tornado. The stronger storms will develop along and east of boundary that will extended from around Sterling to Limon to Pumpkin Center. Further west towards the urban corridor and mountains, the showers and storms will be weaker with only brief rain and gusty winds expected. Expect elevated fire danger over the mountains and high valleys this afternoon with lowering humidity levels and gusty winds. .DAYS TWO THROUGH SEVEN...Friday through Wednesday Isolated to scattered storms are forecast across the I-25 corridor and plains Friday and Saturday, with a warming and drying trend Sunday into early next week. Potential for elevated fire weather conditions in the high country Monday and Tuesday. .SPOTTER INFORMATION STATEMENT... Spotter activation may be needed over far Eastern Colorado after 2 pm today.
In the hours before
Local storm report, Jul 13, 12:35 PM MDT, 3 hours 56 minutes before
Preliminary Local Storm Report
National Weather Service Denver CO
1235 PM MDT Thu Jul 13 2023
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
1223 PM Hail Cope 39.67N 102.85W
07/13/2023 M1.00 inch Washington CO Trained Spotter
&&Local storm report, Jul 13, 2:26 PM MDT, 2 hours 5 minutes before
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</html>Local storm report, Jul 13, 2:35 PM MDT, 1 hour 56 minutes before
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</html>Local storm report, Jul 13, 2:36 PM MDT, 1 hour 55 minutes before
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</html>Local storm report, Jul 13, 2:42 PM MDT, 1 hour 49 minutes before
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</html>Local storm report, Jul 13, 3:27 PM MDT, 1 hour 4 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 13, 12:09 PM MDT | Severe Thunderstorm Warning | BOU | Washington | 36 min |
| Jul 13, 12:27 PM MDT | Severe Thunderstorm Warning | BOU | Lincoln | 48 min |
| Jul 13, 12:43 PM MDT | Severe Thunderstorm Warning | BOU | Washington | 22 min |
| Jul 13, 1:00 PM MDT | Areal Flood Advisory | BOU | Washington | 3 hr |
| Jul 13, 1:04 PM MDT | Severe Thunderstorm Warning | BOU | Lincoln | 41 min |
| Jul 13, 1:36 PM MDT | Severe Thunderstorm Warning | BOU | Lincoln | 39 min |
| Jul 13, 2:05 PM MDT | Tornado Warning | BOU | Lincoln | 25 min |
| Jul 13, 2:30 PM MDT | Severe Thunderstorm Warning | BOU | Lincoln | 45 min |
| Jul 13, 2:33 PM MDT | Severe Thunderstorm Warning | BOU | Lincoln | 42 min |
| Jul 13, 3:01 PM MDT | Severe Thunderstorm Warning | BOU | Lincoln | 44 min |
| Jul 13, 3:50 PM MDT | Severe Thunderstorm Warning | BOU | Weld | 40 min |
| Jul 13, 4:44 PM MDT | Severe Thunderstorm Warning | BOU | Logan | 46 min |
| Jul 13, 4:51 PM MDT | Severe Thunderstorm Warning | BOU | Logan, Morgan, Weld | 39 min |
| Jul 13, 5:29 PM MDT | Severe Thunderstorm Warning | BOU | Morgan, Weld | 29 min |
Nearby
Severe Thunderstorm Warnings in Colorado, 2023Every severe thunderstorm warning in 2023
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.