Alert archive / Colorado / Tornado Warnings in 1991
Tornado Warning 29, NWS Denver/Boulder, CO
NWS Denver/Boulder, CO issued this tornado warning at Jun 2, 1991, 5:01 PM MDT for Adams County, Larimer County, Weld County, Colorado. It was in force for 29 min.
The area
The counties it named.
The facts
- Issued
- Jun 2, 1991, 5:01 PM MDT (23:01 UTC)
- Expired
- Jun 2, 1991, 5:30 PM MDT
- In force
- 29 min
- Issued by
- NWS Denver/Boulder, CO
- Area
- Whole counties
Counties Adams County, CO, Larimer County, CO, Weld County, CO
The nearest sounding before it
Denver, CO (KDEN), launched 12:00Z, 11.0 hours before the alert went out and 139 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
- 110 J/kg
- Mixed-layer CIN
- -53 J/kg
- Mixed-layer LCL
- 832 m above ground
- 0-6 km bulk shear
- 35 kt
- 0-1 km storm-relative helicity
- 31 m²/s²
- 0-3 km storm-relative helicity
- 104 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.3
The text
As transmitted, in the capitals the NWS used until 2016.
000
TTAA00 KDEN 022303
TORDEN
COC069-123-022330-
BULLETIN - EBS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE DENVER CO
501 PM MDT SUN JUN 02 1991
THE NATIONAL WEATHER SERVICE IN DENVER HAS ISSUED A TORNADO
WARNING EFFECTIVE UNTIL 530 PM MDT FOR PEOPLE IN THE FOLLOWING
COUNTIES
IN NORTH CENTRAL COLORADO
SOUTHEASTERN LARIMER
IN NORTHEASTERN COLORADO
SOUTHWESTERN WELD
INCLUDING THE FOLLOWING TOWNS/CITIES
GILCREST...GREELEY...LOVELAND...MILLIKEN AND PLATTEVILLE
AT 501 PM MDT A WELD COUNTY SHERIFF REPORTED A TORNADO ON THE GROUND
NEAR MILLIKEN ...OR ABOUT 14 MILES SOUTHWEST OF GREELEY
THE STORM PRODUCING THE TORNADO WAS MOVING TO THE NORTH ABOUT 30 MPH.
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 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 SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT FOR MUCH OF NORTHEAST
AND NORTH CENTRAL COLORADO UNTIL 8PM MDT.
TO REPORT SEVERE WEATHER HAVE THE NEAREST LAW ENFORCEMENT
AGENCY RELAY YOUR REPORT TO THE NATIONAL WEATHER SERVICE
FORECAST OFFICE IN DENVER.
GCF...DENVER
LAT...LON 4022 10481 4022 10494 4048 10507 4041 104751 follow-up statement
000
TTAA00 KDEN 022305 RRA
TORDEN
COC001-031-022330-
BULLETIN - EBS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE DENVER CO
501 PM MDT SUN JUN 02 1991
THE NATIONAL WEATHER SERVICE IN DENVER HAS ISSUED A TORNADO
WARNING EFFECTIVE UNTIL 530 PM MDT FOR PEOPLE IN THE FOLLOWING
COUNTIES
IN NORTHEASTERN COLORADO
WESTERN ADAMS...AND NORTHERN DENVER
INCLUDING THE FOLLOWING TOWNS/CITIES
AURORA...COMMERCE CITY...NORTHEAST DENVER...
AT 501 PM MDT THE NATIONAL WEATHER SERVICE OBSERVED REPORTED FUNNEL
CLOUDS 3 MILES NORTH OF STAPLETON IN THE CITY OF COMMERCE CITY ...OR
ABOUT 5 MILES NORTH OF DENVER
THE STORM PRODUCING THE TORNADO WAS MOVING TO THE NORTHWEST AT 25 MPH.
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 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.
TO REPORT SEVERE WEATHER HAVE THE NEAREST LAW ENFORCEMENT
AGENCY RELAY YOUR REPORT TO THE NATIONAL WEATHER SERVICE
FORECAST OFFICE IN DENVER.
GARD...WSFO DENVER
LAT...LON 3975 10485 3975 10496 4000 10512 4001 10483What 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 2, 3:47 PM MDT, 1 hour 14 minutes before
COZ011-012-013-014-020400- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE DENVER CO 345PM MDT SUNDAY JUNE 2 1991 ...THUNDERSTORMS INCREASING OVER COLORADO... THUNDERSTORMS ARE INCREASING IN NUMBER OVER NORTHEASTERN COLORADO. A SEVERE THUNDERSTORM WATCH IS POSTED FOR A LARGE PART OF NORTHEAST AND PART OF NORTH CENTRAL COLORADO UNTIL 8PM MDT. A FLASH FLOOD WATCH IS ALSO IN EFFECT FOR THE FRONT RANGE AND NORTHEAST PLAINS OF COLORADO UNTIL MIDNIGHT FOR RIVERS AND STREAMS BELOW 8000 FEET. A FLOOD WARNING IS POSTED FOR THE SOUTH PLATTE RIVER BETWEEN GREELEY TO JUST NORTH OF FORT LUPTON UNTIL MONDAY MORNING. AT 345PM MDT THERE WERE SEVERAL WEAK TO MODERATE THUNDERSTORMS IN WELD AND CENTRAL ADAMS COUNTIES. THERE WERE ALSO SOME STRONG THUNDERSTORMS IN NORTHWEST BOULDER COUNTY. THUNDERSTORMS WERE ALSO SPREADING NORTH FROM SOUTHEAST COLORADO INTO ELBERT COUNTY. THESE THUNDERSTORMS ARE CAPABLE OF PRODUCING HEAVY RAIN...UP TO 2 INCHES IN AN HOUR OR LESS...HAIL AND FREQUENT LIGHTNING. THE THUNDERSTORMS WERE MOVING TO THE NORTH NORTHWEST AT 25-30 MPH. ALL PERSONS IN NORTHEAST COLORADO SHOULD MONITOR NOAA WEATHER RADIO OR LOCAL NEWS MEDIA FOR ADDITIONAL STATEMENTS AND WARNINGS. BE ALERT AND BE PREPARED TO MOVE TO A PLACE OF SHELTER IF THREATENING WEATHER IS IN YOUR AREA. PEOPLE NEAR STREAMS AND RIVERS SHOULD BE READY TO MOVE TO HIGHER GROUND IF HEAVY RAIN IS OBSERVED OR IF WATER LEVELS BEGIN TO RISE. MANY STREAMS AND CREEKS IN AND NEAR THE FRONT RANGE FOOTHILLS AND NEARBY PLAINS ARE RUNNING QUITE HIGH ALREADY. ANY HEAVY RAINFALL WILL BE ENOUGH TO MAKE THEM OVERFLOW THEIR BANKS IN SOME AREAS. HEAVY RAIN IN AN URBAN AREA WILL CAUSE FLOODING OF STREETS ESPECJIALLY IN LOW LYING AREAS AND AT INTERSECTIONS. END...GCF...WSFO DENVER
Special weather statement, Jun 2, 4:01 PM MDT, 1 hour before
COZ012-022300- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE DENVER CO 400 PM MDT SUN JUNE 2 1991 ...STRONG THUNDERSTORM OVER NORTHEAST COLORADO... AT 350 PM MDT NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A STRONG THUNDERSTORM IN NORTHERN WELD COUNTY 9 MILES SOUTH OF KEOTA OR 50 MILES EAST OF FORT COLLINS. THIS STROM WAS MOVING TO THE NORTHWEST AT 25 MPH. ALL PERSONS IN NORTHERN WELD COUNTY INCLUDING THE TOWNS OF GROVER... BRIGGSDALE AND HEREFORD SHOULD BE ALERT FRO FREQUENT DANGEROUS LIGHTNING...HAIL AND STRONG GUSTY WINDS FROM THIS STORM TIL 500 PM MDT THIS AFTERNOON. HEAVY RAIN MAY CAUSE LOCAL FLOODING OF HIGHWAYS...DITCHES...SMALL STREAMS AND LOW LYING OR FLOOD PROlNE AREAS. GARD...WSFO DENVER
Special weather statement, Jun 2, 4:24 PM MDT, 37 minutes before
COZ011-022330- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE DENVER CO 425 PM MDT SUN JUNE 2 1991 ...STRONG THUNDERSTORMS MAY DEVELOP OVER SOUTHERN METRO AREA... AT 415 PM MDT NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED THAT STRONG THUNDERSTORMS COULD DEVELOP RAPIDLY OVER THE SOUTHERN PORTION OF THE DENVER METRO AREA FROM NEAR PARKER WEST TO LITTLETON. SHOULD STORMS DEVELOP THEY WILL MOVE TO THE NORTHWEST AT 25 MPH ACROSS CENTRAL DENVER. ALL PEOPLE IN THE SOUTHERN PORTION OF THE DENVER METRO AREA SHOULD BE ALERT FOR FREQUENT DANGEROUS LIGHTNING...HAIL AND STRONG GUSTY WINDS FROM THESE STORMS TIL 530 PM MDT THIS AFTERNOON. HEAVY RAIN MAY CAUSE LOCAL FLOODING OF STREETS...DITCHES...SMALL STREAMS AND LOW LYING OR FLOOD PRONE AREAS. GARD...WSFO DENVER
Special weather statement, Jun 2, 4:38 PM MDT, 23 minutes before
COZ011-022330- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE DENVER CO 440 PM MDT SUN JUNE 2 1991 ...STRONG THUNDERSTORMS OVER SOUTHEAST METRO DENVER... AT 435 PM MDT NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED STRONG THUNDERSTORMS OVER SOUTHEAST METRO DENVER IN THE VICNITY OF SOUTH AURORA AND SOUTHEAST DENVER. THESE STROMS WERE MOVING TO THE NORTHWEST AT 25 MPH. ALL PEOPLE IN THE DENVER METRO AREA SHOULD BE ALERT FOR FREQUENT DANGEROUS LIGHTNING...HAIL AND STRONG GUSTY WINDS FROM THESE STORMS TIL 530 PM MDT THIS AFTERNOON. HEAVY RAIN MAY CAUSE LOCAL FLOODING OF STREETS...DITCHES...SMALL STREAMS AND LOW LYING OR FLOOD PRONE AREAS. GARD...WSFO DENVER
Special weather statement, Jun 2, 4:44 PM MDT, 17 minutes before
COZ011-022330- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE DENVER CO 445PM MDT SUN JUNE 2 1991 ...HEAVY RAIN AND STRONG THUNDERSTORM NEAR MEAD COLORADO... AT 445 PM MDT RADAR INDICATED A STRONG NEAR HARNEY COLORADO. THIS THUNDERSTORM WAS DUMPING 1 TO 2 INCHES OF RAIN PER HOUR IN THE TOWN OF MEAD ACCORDING TO REPORTS FROM AHAM RADIO OPERATOR. THE THUNDERSTORM IS MOVING TO THE NORTH NORTHWEST ABOUT 30 MPH. PEOPLE IN WESTERN WELD AND SOUTHEASTERN LARIMER COUNTY SHOULD BE ALERT FOR THIS STORM AND MOVE INDOORS IF THREATENING WEATHER APPROACHES. MOTORISTS ALONG AND NEAR I-25 BETWEEN 40 AND 60 MILES NORTH OF DENVER SHOULD WATCH FOR HEAVY RAIN. THIS THUNDERSTORM COULD CAUSE FLOODING OF STREETS AND LOW LYING AREAS. IF YOU ARE NEAR A CREEK OR STREAM IN SOUTHWEST WELD OR SOUTHEAST LARIMER COUNTY MOVE TO HIGHER GROUND IF HEAVY RAIN REACHES YOUR LOCATION AS STREAMS ARE LIKELY TO OVERFLOW IN THIS AREA. END...GCF...WSFO DENVER
Special weather statement, Jun 2, 4:47 PM MDT, 14 minutes before
COZ011-022330- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE DENVER CO 450 PM MDT SUN JUNE 2 1991 ...STRONG THUNDERSTORMS OVER SOUTHEAST METRO DENVER... AT 445 PM MDT NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A STRONG THUNDERSTORM INTENSIFYING OVER THE EAST METRO DENVER IN THE VICNITY OF AURORA. THIS STORM MAY CONTAIN HAIL. THIS STORM WAS MOVING TO THE NORTHWEST AT 25 MPH. ALL PEOPLE IN THE DENVER METRO AREA SHOULD BE ALERT FOR FREQUENT DANGEROUS LIGHTNING...HAIL AND STRONG GUSTY WINDS FROM THIS STORM TIL 530 PM MDT THIS AFTERNOON. HEAVY RAIN MAY CAUSE LOCAL FLOODING OF STREETS...DITCHES...SMALL STREAMS AND LOW LYING OR FLOOD PRONE AREAS. GARD...WSFO DENVER
The office that day
Everything else NWS Denver/Boulder, CO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 1, 6:07 PM MDT | Tornado Warning | BOU | Boulder | 38 min |
| Jun 1, 6:33 PM MDT | Tornado Warning | BOU | Larimer | 27 min |
| Jun 1, 8:02 PM MDT | Flash Flood Warning | BOU | Larimer | 3 hr |
| Jun 1, 11:00 PM MDT | Flash Flood Warning | BOU | Larimer | 2 hr |
| Jun 2, 5:01 PM MDT | Tornado Warning | BOU | Denver | 29 min |
| Jun 2, 5:27 PM MDT | Severe Thunderstorm Warning | BOU | Adams, Boulder, Denver, Jefferson | 48 min |
| Jun 2, 5:27 PM MDT | Severe Thunderstorm Warning | BOU | Weld | 48 min |
| Jun 2, 5:41 PM MDT | Severe Thunderstorm Warning | BOU | Adams, Morgan, Washington | 64 min |
| Jun 2, 5:45 PM MDT | Flash Flood Warning | BOU | Denver | 75 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; the sounding from the Mesonet's radiosonde archive.