Alert archive / Colorado / Tornado Warnings in 1991
Tornado Warning 41, NWS Denver/Boulder, CO
NWS Denver/Boulder, CO issued this tornado warning at Jun 22, 1991, 2:36 PM MDT for Larimer County, Weld County, Colorado. It was in force for 39 min. 2 reports came from inside the area while it was in force.
The area
The counties it named, with what was reported inside it.
The facts
- Issued
- Jun 22, 1991, 2:36 PM MDT (20:36 UTC)
- Expired
- Jun 22, 1991, 3:15 PM MDT
- In force
- 39 min
- Issued by
- NWS Denver/Boulder, CO
- Area
- Whole counties
Counties Larimer County, CO, Weld County, CO
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Jun 22, 2:40 PM MDT | Tornado F0 | Weld, CO | |
| Jun 22, 3:18 PM MDT | Hail 1.75 | Weld, CO |
NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in. Storm Data before 1996 records only tornadoes, thunderstorm wind and hail.
The nearest sounding before it
Denver, CO (KDEN), launched 12:00Z, 8.6 hours before the alert went out and 166 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
As transmitted, in the capitals the NWS used until 2016.
000
TTAA00 KDEN 222039
TORDEN
COC069-123-222115-
BULLETIN - EBS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE DENVER CO
236 PM MDT SAT JUN 22 1991
THE NATIONAL WEATHER SERVICE IN DENVER HAS ISSUED A TORNADO
WARNING EFFECTIVE UNTIL 315 PM MDT FOR PEOPLE IN THE FOLLOWING
COUNTIES
IN NORTH CENTRAL COLORADO
SOUTHEASTERN LARIMER
IN NORTHEASTERN COLORADO
WEST CENTRAL WELD
INCLUDING THE FOLLOWING TOWNS/CITIES
AULT...EATON...EVANS...GREELEY...LA SALLE...LOVELAND...
PIERCE...PURCELL...SEVERANCE...TIMNATH AND WINDSOR
AT 236 PM MDT TRAINED HAM RADIO SPOTTERS REPORTED MULTIPLE FUNNEL CLOUDS
IN THE VICINTY OF WINDSOR. ONE OF THESE FUNNELS REPORTEDLY TOUCHED
DOWN.
THE STORM PRODUCING THE TORNADO WAS MOVING SOUTHEAST AT 10 TO 15 MILES
AN HOUR AND WILL REACH THE GREELEY AREA ABOUT 300 PM.
THE SAFEST PLACE TO BE DURING A TORNADO IS IN A BASEMENT. GET
UNDER A WORKBENCH OR OTHER PIECE OF STURDY FURNITURE. IF NO
BASEMENT IS AVAILABLE...SEEK SHELTER ON THE LOWEST FLOOR OF THE
BUILDING IN AN INTERIOR HALLWAY OR ROOM SUCH AS A CLOSET. USE
BLANKETS OR PILLOWS TO COVER YOUR BODY AND ALWAYS STAY AWAY
FROM WINDOWS.
IF IN MOBILE HOMES OR VEHICLES...EVACUATE THEM AND GET INSIDE A
SUBSTANTIAL SHELTER. IF NO SHELTER IS AVAILABLE...LIE FLAT IN
THE NEAREST DITCH OR OTHER LOW SPOT AND COVER YOUR HEAD WITH
YOUR HANDS.
A TORNADO THUNDERSTORM WATCH REMAINS IN EFFECT FOR MUCH OF EASTERN
COLORADO UNTIL 900 PM MDT.
TO REPORT SEVERE WEATHER HAVE THE NEAREST LAW ENFORCEMENT
AGENCY RELAY YOUR REPORT TO THE NATIONAL WEATHER SERVICE
FORECAST OFFICE IN DENVER.
WOLF
LAT...LON 4036 10457 4037 10503 4065 10505 4065 10455What forecasters said that day
The local office's own words before this tornado 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, 10:04 AM MDT, 4 hours 32 minutes before
COZ011>017-222100- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE DENVER CO 1000 AM MDT SAT JUN 22 1991 ...ROUND 2 OF SEVERE WEATHER EXPECTED IN EASTERN COLORADO TODAY... SEVERE THUNDERSTORMS ARE EXPECTED TO DEVELOP ONCE AGAIN ACROSS PORTIONS OF EASTERN COLORADO THIS AFTERNOON AND EVENING. THESE THUNDERSTORMS WILL BE CAPABLE OF PRODUCING LARGE HAIL...DAMAGING WINDS...HEAVY RAIN...AND POSSIBLY A FEW TORNADOES. THE HEAVY RAINS EXPECTED TODAY COMBINED WITH THOSE OF YESTERDAY MAY CAUSE SOME LOCALIZED FLOODING OF URBAN AREAS AND SMALL STREAMS OR RIVERS. PERSONS IN EASTERN COLORADO SHOULD BE ALERT TO THIS POSSIBILITY AND CONTINUE TO STAY ABREAST OF THE LATEST WEATHER INFORMATION. CONTINUE TO LISTEN TO NOAA WEATHER RADIO...COMMERCIAL RADIO...OR TELEVISION FOR FURTHER STATEMENTS AND/OR WATCHES AND WARNINGS. HEITKAMP
Special weather statement, Jun 22, 1:13 PM MDT, 1 hour 23 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, 42 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, 29 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, 2:45 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, 4:31 PM MDT | Severe Thunderstorm Warning | BOU | Morgan, Weld | 44 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
Tornado Warnings in Colorado, 1991Every tornado warning in 1991Tornadoes 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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive.