Alert archive / Colorado / Tornado Warnings in 1991
Tornado Warning 38, NWS Denver/Boulder, CO
NWS Denver/Boulder, CO issued this tornado warning at Jun 17, 1991, 4:04 PM MDT for Sedgwick County, Colorado. It was in force for 26 min.
The area
The counties it named.
The facts
- Issued
- Jun 17, 1991, 4:04 PM MDT (22:04 UTC)
- Expired
- Jun 17, 1991, 4:30 PM MDT
- In force
- 26 min
- Issued by
- NWS Denver/Boulder, CO
- Area
- Whole counties
County Sedgwick County, CO
The nearest sounding before it
Denver, CO (KDEN), launched 12:00Z, 10.1 hours before the alert went out and 134 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 3163 m above ground
- 0-6 km bulk shear
- 25 kt
- 0-1 km storm-relative helicity
- 92 m²/s²
- 0-3 km storm-relative helicity
- 65 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000
TTAA00 KDEN 172207
TORDEN
COC115-172230-
BULLETIN - EBS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE DENVER CO
404 PM MDT MON JUN 17 1991
THE NATIONAL WEATHER SERVICE IN DENVER HAS ISSUED A TORNADO
WARNING EFFECTIVE UNTIL 430 PM MDT FOR PEOPLE IN THE FOLLOWING
COUNTIES
IN NORTHEASTERN COLORADO
SEDGWICK
INCLUDING THE FOLLOWING TOWNS/CITIES
JULESBURG...OVID AND SEDGWICK
AT 404 PM MDT RADAR INDICATED A SEVERE THUNDERSTORM 4 MILES SOUTH OF
SEDGWICK ...OR ABOUT 39 MILES NORTHEAST OF STERLING. NUMEROUS REPORTS
OF FUNNEL CLOUDS HAVE BEEN RECEIVED FROM THE PUBLIC.
THE STORM PRODUCING THE TORNADO WAS MOVING TO THE SOUTHEAST 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 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 SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT FOR EXTREME NORTHEAST
COLORADO.
HOLMES
LAT...LON 4078 10211 4076 10260 4098 10262 4099 10217What 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 17, 2:56 PM MDT, 1 hour 8 minutes before
COZ011>013-172230- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE DENVER CO 255 PM MDT MON JUN 17 1991 ...VERY STRONG DOWNBURST WINDS IN DENVER AREA... HIGH-BASED SHOWERS HAVE BEEN SPREADING EASTWARD ACROSS THE DENVER AREA DURING THE PAST SEVERAL HOURS. THE RESULT HAS BEEN AREAS OF VERY STRONG WINDS. AT 250 PM MDT...WIND GUSTS TO 59 MPH HIT THE NATIONAL WEATHER SERVICE AT STAPLETON AIRPORT...OVERTURNING SMALL BUT RATHER HEAVY OBJECTS AND LCAUSING BLOWING DUST. PEOPLE IN DENVER AND OTHER NORTHEAST COLORADO LOCATIONS SHOULD BE PREPARED FOR LOCALIZED BUT VERY STRONG WINDS FOR THE REMAINDER OF THE AFTERNOON AND EARLY EVENING. COMMUTERS...BE READY! DULONG
Special weather statement, Jun 17, 3:52 PM MDT, 12 minutes before
COZ013-172230- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE DENVER CO 350 PM MDT MON JUN 17 1991 ...SEVERE THUNDERSTORM WATCH FOR EXTREME NORTHEAST COLORADO UNTIL 1000 PM MDT... THE NATIONAL SEVERE STORMS FORECAST CENTER IN KANSAS CITY HAS ISSUED A SEVERE THUNDERSTORM WATCH FOR EXTREME NORTHEAST COLORADO UNTIL 1000 PM MDT. IN COLORADO THIS INCLUDES PHILLIPS...SEDGWICK...AND EASTERN YUMA COUNTIES. CITIES INCLUDED IN THIS WATCH AREA ARE WRAY...HOLYOKE...AND JULESBURG. NATIONAL WEATHER SERVICE DOPPLER RADAR SHOWED STRONG THUNDERSTORMS WITH HEAVY RAIN LOCATED 10 MILES WEST OF JULESBURG AT 345 PM MDT. THESE THUNDERSTORMS WERE MOVING SOUTHEAST AT 20 TO 25 MPH. BE PREPARED FOR STRONG GUSTY WINDS...HEAVY RAIN...HAIL...AND POSSIBLY TORNADOS. TAKE SHELTER IN A DITCH IF YOU ARE IN AN EXPOSED AREA. STAY TUNED TO NOAA WEATHER RADIO AND LOCAL BROADCASTS FOR FURTHER INFORMATION. HOLMES
Special weather statement, Jun 17, 3:55 PM MDT, 9 minutes before
COZ013-172230- SPECIAL WEATHER STATEMENT...CORRECTED NATIONAL WEATHER SERVICE DENVER CO 350 PM MDT MON JUN 17 1991 ...SEVERE THUNDERSTORM WATCH FOR EXTREME NORTHEAST COLORADO UNTIL 900 PM MDT... THE NATIONAL SEVERE STORMS FORECAST CENTER IN KANSAS CITY HAS ISSUED A SEVERE THUNDERSTORM WATCH FOR EXTREME NORTHEAST COLORADO UNTIL 900 PM MDT. IN COLORADO THIS INCLUDES PHILLIPS...SEDGWICK...AND EASTERN YUMA COUNTIES. CITIES INCLUDED IN THIS WATCH AREA ARE WRAY...HOLYOKE...AND JULESBURG. NATIONAL WEATHER SERVICE DOPPLER RADAR SHOWED STRONG THUNDERSTORMS WITH HEAVY RAIN LOCATED 10 MILES WEST OF JULESBURG AT 345 PM MDT. THESE THUNDERSTORMS WERE MOVING SOUTHEAST AT 20 TO 25 MPH. BE PREPARED FOR STRONG GUSTY WINDS...HEAVY RAIN...HAIL...AND POSSIBLY TORNADOS. TAKE SHELTER IN A DITCH IF YOU ARE IN AN EXPOSED AREA. STAY TUNED TO NOAA WEATHER RADIO AND LOCAL BROADCASTS FOR FURTHER INFORMATION. HOLMES
The office that day
Everything else NWS Denver/Boulder, CO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 16, 6:28 PM MDT | Severe Thunderstorm Warning | BOU | Yuma | 32 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.