Alert archive / Colorado / Severe Thunderstorm Warnings in 2023
Severe Thunderstorm Warning 62, NWS Denver/Boulder, CO
NWS Denver/Boulder, CO issued this severe thunderstorm warning at May 30, 2023, 2:34 PM MDT for Adams County, Arapahoe County, Colorado. It was in force for 24 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
- May 30, 2023, 2:34 PM MDT (20:34 UTC)
- Expired
- May 30, 2023, 2:58 PM MDT
- In force
- 24 min
- Issued by
- NWS Denver/Boulder, CO
- Area
- Storm-based polygon
- Hail
- 0.75 in
- Wind
- 60.0 mph
Counties Adams County, CO, Arapahoe County, CO
The radar
The Denver radar (KFTG), 18 km from the middle of the area, began a volume at 20:36 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
N. Platte/Lee Bi, NE (KLBF), launched 12:00Z, 8.6 hours before the alert went out and 351 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
- 6 J/kg
- Mixed-layer CIN
- -412 J/kg
- Mixed-layer LCL
- 1905 m above ground
- 0-6 km bulk shear
- 22 kt
- 0-1 km storm-relative helicity
- 100 m²/s²
- 0-3 km storm-relative helicity
- 137 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 May 30, 10:55 AM MDT, 3 hours 39 minutes earlier.
Area forecast discussion, May 30, 10:55 AM MDT, 3 hours 39 minutes before
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</html>Hazardous weather outlook, May 30, 10:35 AM MDT, 3 hours 59 minutes before
Hazardous Weather Outlook National Weather Service Denver/Boulder CO 1035 AM MDT Tue May 30 2023 COZ030>051-311645- 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- 1035 AM MDT Tue May 30 2023 This hazardous weather outlook is for northeast and north central Colorado. .DAY ONE...Today and Tonight Scattered storms and showers are possible starting this afternoon across the foothills and mountains. These storms will push into the I-25 corridor and eastern plains late afternoon and early evening. A few of the storms may become severe. The main threats with the severe storms will be 70 mph wind gusts, brief heavy rainfall, and hail up to golf ball size. .DAYS TWO THROUGH SEVEN...Wednesday through Monday Thunderstorm activity is expected to increase through this weekend, with a period of steady rain possible Friday or Saturday. The threat of severe thunderstorms will be greatest on Wednesday. The main threat will be large hail, but strong winds and heavy rain are also possible. There will be a greater threat of heavy rain from Thursday into the weekend. These threats will be lower west of the Front Range. .SPOTTER INFORMATION STATEMENT... Spotters are encouraged to report heavy rain, hail, or significant weather which is always appreciated.
In the hours before
Special weather statement, May 30, 1:41 PM MDT, 53 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 |
|---|---|---|---|---|
| May 30, 1:41 PM MDT | Special Weather Statement | BOU | Arapahoe | 49 min |
| May 30, 2:20 PM MDT | Special Weather Statement | BOU | Denver | 25 min |
| May 30, 4:01 PM MDT | Special Weather Statement | BOU | Morgan | 44 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.