Alert archive / Colorado / Severe Thunderstorm Warnings in 1991
Severe Thunderstorm Warning 82, NWS Denver/Boulder, CO
NWS Denver/Boulder, CO issued this severe thunderstorm warning at Jun 9, 1991, 3:35 PM MDT for Weld County, Colorado. It was in force for 55 min.
The area
The counties it named.
The facts
- Issued
- Jun 9, 1991, 3:35 PM MDT (21:35 UTC)
- Expired
- Jun 9, 1991, 4:30 PM MDT
- In force
- 55 min
- Issued by
- NWS Denver/Boulder, CO
- Area
- Whole counties
County Weld County, CO
The nearest sounding before it
Denver, CO (KDEN), launched 12:00Z, 9.6 hours before the alert went out and 125 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
- 2 J/kg
- Mixed-layer CIN
- -512 J/kg
- Mixed-layer LCL
- 2648 m above ground
- 0-6 km bulk shear
- 20 kt
- 0-1 km storm-relative helicity
- 71 m²/s²
- 0-3 km storm-relative helicity
- 63 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.
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.
In the hours before
Special weather statement, Jun 9, 3:05 PM MDT, 30 minutes before
COZ011-012-013-014-092200- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE DENVER CO 305 PM MDT SUN JUN 9 1991 ...TORNADO WATCH FOR MOST OF NORTHEAST COLORADO TIL 900 PM MDT... AT 305 PM MDT RADAR WAS SHOWING A STRONG THUNDERSTORM OVER NORTHERN LARIMER COUNTY ABOUT 30 MILES NORTH OF FORT COLLINS. THIS STORM WAS MOVING TO THE EAST-SOUTHEAST AT 25 MPH AND WILL CROSS EXTREME NORTHEAST LARIMER COUNTY BY 400 PM. A FEW OTHER THUNDERSTORMS WERE DEVELOPING OVER EASTERN LARIMER AND WESTERN WELD COUNTY...AND SOUTHERN PARTS OF DOUGLAS AND ARAPAHOE COUNTIES. THESE STORMS WERE MOVING EAST AT 25 MPH. A TORNADO WATCH IS IN EFFECT UNTIL 900 PM FOR MOST OF NORTHEAST COLORADO. IN THE DENVER METRO AREA...THIS IS TO THE EAST OF SHERIDAN BOULEVARD. LISTEN TO NOAA WEATHER RADIO...OR LOCAL RADIO AND T.V....FOR UPDATES OR WARNINGS THIS AFTERNOON AND EVENING. MCQUEEN
The office that day
Everything else NWS Denver/Boulder, CO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 8, 6:30 PM MDT | Severe Thunderstorm Warning | BOU | Logan, Phillips | 45 min |
| Jun 9, 3:51 PM MDT | Tornado Warning | BOU | Weld | 39 min |
| Jun 9, 4:30 PM MDT | Tornado Warning | BOU | Weld | 45 min |
| Jun 9, 5:10 PM MDT | Severe Thunderstorm Warning | BOU | Adams, Arapahoe | 35 min |
| Jun 9, 5:12 PM MDT | Severe Thunderstorm Warning | BOU | Adams, Denver, Jefferson | 48 min |
| Jun 9, 5:16 PM MDT | Tornado Warning | BOU | Weld | 59 min |
| Jun 9, 5:59 PM MDT | Severe Thunderstorm Warning | BOU | Arapahoe, Denver | 61 min |
Nearby
Severe Thunderstorm Warnings in Colorado, 1991Every severe thunderstorm warning in 1991
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.