Alert archive / Colorado / Severe Thunderstorm Warnings in 1991
Severe Thunderstorm Warning 124, NWS Denver/Boulder, CO
NWS Denver/Boulder, CO issued this severe thunderstorm warning at Jun 22, 1991, 4:31 PM MDT for Morgan County, Weld County, Colorado. It was in force for 44 min.
The area
The counties it named.
The facts
- Issued
- Jun 22, 1991, 4:31 PM MDT (22:31 UTC)
- Expired
- Jun 22, 1991, 5:15 PM MDT
- In force
- 44 min
- Issued by
- NWS Denver/Boulder, CO
- Area
- Whole counties
Counties Morgan County, CO, Weld County, CO
The nearest sounding before it
Denver, CO (KDEN), launched 12:00Z, 10.5 hours before the alert went out and 95 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
- 299 J/kg
- Mixed-layer CIN
- -102 J/kg
- Mixed-layer LCL
- 841 m above ground
- 0-6 km bulk shear
- 22 kt
- 0-1 km storm-relative helicity
- 161 m²/s²
- 0-3 km storm-relative helicity
- 217 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.9
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 22, 1:13 PM MDT, 3 hours 18 minutes before
COZ011-012-014-015-016-222000- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE DENVER CO 110 PM MDT SAT JUN 22 1991 ...TORNADO WATCH IN EFFECT FOR PORTIONS OF EASTERN COLORADO UNTIL 900 PM MDT... THE NATIONAL SEVERE STORMS FORECAST CENTER IN KANSAS CITY HAS ISSUED A TORNADO WATCH FOR PORTIONS OF EASTERN COLORADO UNTIL 900 PM MDT THIS AFTERNOON AND EVENING. THIS WATCH INCLUDES THE FRONT RANGE...PIKES PEAK/PALMER DIVIDE...NORTHEAST PLAINS...SOUTHEAST FOOTHILLS...AND THE SOUTHEAST PLAINS. THIS WATCH MEANS CONDITIONS ARE FAVORABLE FOR TORNADOS AND SEVERE THUNDERSTORMS IN AND CLOSE TO THE WATCH AREA. AT 110 PM NATIONAL WEATHER SERVICE DOPPLER RADAR SHOWED STRONG THUNDERSTORMS WITH HEAVY RAIN BEGINNING TO DEVELOP OVER THE MOUNTAINS. THE STRONGEST THUNDERSTORM WAS LOCATED OVER SOUTHERN LARIMER COUNTY OVER GLEN HAVEN ABOUT 10 MILES NORTHEAST OF ESTES PARK. THE STORM WAS MOVING NORTHEAST AT 20 TO 25 MPH. THE EXPECTED SEVERE WEATHER TODAY IS THE RESULT OF PLENTY OF MOISTURE AND FAVORABLE SURFACE AND UPPER ATMOSPHERIC WINDS. PEOPLE IN PORTIONS OF EASTERN COLORADO SHOULD BE ALERT TO THE POSSIBILITY OF TORNADOS AND SEVERE THUNDERSTORMS THIS AFTERNOON AND EVENING. BE ON THE LOOKOUT FOR TORNADOS...3/4 INCH HAIL OR GREATER...WINDS IN EXCESS OF 58 MPH...AND HEAVY RAIN. CONTINUE TO STAY ABREAST OF THE LATEST WEATHER INFORMATION. CONTINUE TO LISTEN TO NOAA WEATHER RADIO...COMMERCIAL RADIO...OR TELEVISION FOR FURTHER STATEMENTS OR WARNINGS. HOLMES
Special weather statement, Jun 22, 1:54 PM MDT, 2 hours 37 minutes before
COZ011-222100- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE DENVER CO 153 PM MDT SAT JUN 22 1991 ...THUNDERSTORMS DEVELOPING OVER WESTERN DENVER METRO AREA... AT 145 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR SHOWED THUNDERSTORMS DEVELOPING OVER THE WESTERN PORTION OF THE DENVER METRO AREA. THE STORMS WERE MOVING NORTHEAST AT 25 MPH. PEOPLE IN LITTLETON...COMMERCE CITY...DENVER AND BRIGHTON SHOULD BE ALERT FOR GUSTY WINDS...BRIEF HEAVY RAIN AND HAIL UNTIL AROUND 300 PM. CONTINUE TO MONITOR COMMERCIAL MEDIA...AS WELL AS NOAA WEATHER RADIO FOR FURTHER STATEMENTS AND POSSIBLE WARNINGS. A TORNADO WATCH IS IN EFFECT FOR MUCH OF EASTERN COLORADO...INCLUDING THE DENVER METRO AREA UNTIL 9PM MDT TONIGHT. LESZCYNSKI
Special weather statement, Jun 22, 2:07 PM MDT, 2 hours 24 minutes before
COZ011-222100- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE DENVER CO 207 PM MDT SAT JUN 22 1991 ...THUNDERSTORMS MOVING INTO DENVER... AT 156 PM MDT MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR SHOWED TWO THUNDERSTORMS INTENSIFYING AS THEY MOVE INTO THE DENVER METRO AREA. ONE THUNDERSTORM WAS LOCATED OVER ARVADA...WITH A SECOND STORM OVER SOUTHWEST DENVER. THESE STORMS WERE MOVING NORTHEAST AT 10 TO 15 MPH. A PUBLIC REPORT OF A FUNNEL CLOUD WAS REPORTED NEAR EDGEWATER AT 2 PM MDT...WITH A SECOND FUNNEL REPORTED AT 100TH AND LOWELL IN WESTMINSTER AT 205 PM. THE ENTIRE FRONT RANGE CONTINUES UNDER A TORNADO WATCH UNTIL 9 PM MDT...SO RESIDENTS ALONG THE FRONT RANGE SHOULD CLOSELY MONITOR THE WEATHER THIS AFTERNOON...AND BE PREPARED TO TAKE COVER FROM THUNDERSTORMS. TORNADOES AND LARGE HAIL MAY BE POSSIBLE. RTG
The office that day
Everything else NWS Denver/Boulder, CO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 21, 6:39 PM MDT | Severe Thunderstorm Warning | BOU | Jefferson | 21 min |
| Jun 21, 8:50 PM MDT | Severe Thunderstorm Warning | BOU | Adams, Denver, Jefferson | 40 min |
| Jun 21, 9:25 PM MDT | Severe Thunderstorm Warning | BOU | Adams, Denver | 25 min |
| Jun 21, 10:41 PM MDT | Severe Thunderstorm Warning | BOU | Denver, Jefferson | 29 min |
| Jun 21, 11:09 PM MDT | Severe Thunderstorm Warning | BOU | Denver | 26 min |
| Jun 21, 11:17 PM MDT | Severe Thunderstorm Warning | BOU | Adams, Arapahoe | 28 min |
| Jun 22, 1:57 PM MDT | Severe Thunderstorm Warning | BOU | Larimer, Weld | 33 min |
| Jun 22, 2:11 PM MDT | Severe Thunderstorm Warning | BOU | Boulder, Weld | 34 min |
| Jun 22, 2:11 PM MDT | Severe Thunderstorm Warning | BOU | Adams | 34 min |
| Jun 22, 2:36 PM MDT | Tornado Warning | BOU | Larimer, Weld | 39 min |
| Jun 22, 2:45 PM MDT | Severe Thunderstorm Warning | BOU | Weld | 30 min |
| Jun 22, 3:15 PM MDT | Severe Thunderstorm Warning | BOU | Weld | 45 min |
| Jun 22, 3:50 PM MDT | Severe Thunderstorm Warning | BOU | Morgan, Weld | 40 min |
| Jun 22, 5:15 PM MDT | Tornado Warning | BOU | Morgan, Weld | 30 min |
| Jun 22, 5:47 PM MDT | Severe Thunderstorm Warning | BOU | Logan, Morgan, Weld | 43 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.