Alert archive / Colorado / Tornado Warnings in 1991
Tornado Warning 15, NWS Denver/Boulder, CO
NWS Denver/Boulder, CO issued this tornado warning at May 29, 1991, 8:13 PM MDT for Yuma County, Colorado. It was in force for 47 min. 1 report 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
- May 29, 1991, 8:13 PM MDT (02:13 UTC)
- Expired
- May 29, 1991, 9:00 PM MDT
- In force
- 47 min
- Issued by
- NWS Denver/Boulder, CO
- Area
- Whole counties
County Yuma County, CO
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| May 29, 8:51 PM MDT | Tornado F0 | Yuma, 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 00:00Z, 2.2 hours before the alert went out and 70 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
- 159 J/kg
- Mixed-layer CIN
- -89 J/kg
- Mixed-layer LCL
- 2802 m above ground
- 0-6 km bulk shear
- 42 kt
- 0-1 km storm-relative helicity
- 127 m²/s²
- 0-3 km storm-relative helicity
- 237 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 2.0
The text
As transmitted, in the capitals the NWS used until 2016.
000
TTAA00 KDEN 300217
TORDEN
COC125-300300-
BULLETIN - EBS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE DENVER CO
813 PM MDT WED MAY 29 1991
THE NATIONAL WEATHER SERVICE IN DENVER HAS ISSUED A TORNADO
WARNING EFFECTIVE UNTIL 900 PM MDT FOR PEOPLE IN THE FOLLOWING
COUNTIES
IN NORTHEASTERN COLORADO
CENTRAL YUMA
INCLUDING THE FOLLOWING TOWNS/CITIES
BEECHER ISLAND...ECKLEY...WRAY AND YUMA
AT 813 PM MDT A WEATHER SPOTTER REPORTED A FUNNEL CLOUD
3 MILES SOUTH OF YUMA...OR ABOUT 50 MILES SOUTHEAST OF STERLING.
THIS STORM HAS ALSO PRODUCED TORNADOES.
THE STORM PRODUCING THE TORNADO WAS MOVING TO THE EAST AT 20 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 TORNADO WATCH REMAINS IN EFFECT FOR NORTHEAST COLORADO TIL 900 PM MDT
THIS EVENING.
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 3985 10207 3986 10277 4017 10276 4020 10208What 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, May 29, 2:56 PM MDT, 5 hours 17 minutes before
COZ011-012-292115- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE DENVER CO 255 PM MDT WED MAY 29 1991 ...STRONG THUNDERSTORMS DEVELOPING ALONG THE FRONT RANGE... AT 250 PM MDT NATIONAL WEATHER SERVICE RADAR AT LIMON INDICATED STRONG THUNDERSTORMS DEVELOPING ALONG THE FRONT RANGE. THE STRONGEST THUNDERSTORM WAS LOCATED OVER BOULDER...OR 25 MILES NORTHWEST OF DOWNTOWN DENVER. THIS THUNDERSTORM WAS MOVING TO THE NORTH-NORTHEAST AT 15 TO 25 MPH AND WILL BE AFFECTING THE TOWNS OF NIWOT...LOUISVILLE AND OTHER AREAS AROUND BOULDER BY 315 PM MDT. PERSONS ALONG THE FRONT RANGE...ESPECIALLY IN BOULDER COUNTY...SHOULD BE ON THE LOOKOUT FOR THESE THUNDERSTORMS AS THEY ARE CAPABLE OF PRODUCING BRIEF HEAVY RAIN...SMALL HAIL...STRONG WINDS...AND DANGEROUS LIGHTNING. IF THREATENING WEATHER APPROACHES...SEEK SHELTER IN A REINFORCED STRUCTURE AND WAIT FOR THE STORM TO PASS. PERSONS SHOULD ALSO CONTINUE TO MONITOR NOAA WEATHER RADIO...TELEVISION OR COMMERCIAL RADIO FOR LATER STATEMENTS AND/OR POSSIBLE WARNINGS. HEITKAMP
Special weather statement, May 29, 3:52 PM MDT, 4 hours 21 minutes before
COZ011-012-292230-
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE DENVER CO
352 PM MDT WED MAY 29 1991
...STRONG THUNDERSTORMS CONTINUE TO DEVELOP ALONG FRONT RANGE...
AT 340 PM MDT...NATIONAL WEATHER SERVICE RADAR INDICATED STRONG
THUNDERSTORMS DEVELOPING ALONG THE FRONT RANGE NORTH OF DENVER. THE
STRONGEST STORM WAS LOCATED IN EASTERN WELD COUNTY 10 WEST OF GOODRICH.
THE STORM WAS MOVING EAST AT 20 TO 25 MILES AN HOUR. A SECOND STORM WAS
LOCATED IN FAR SOUTHWESTERN WELD COUNTY ABOUT 8 MILES SOUTHWEST OF
PLATTEVILLE. THIS STORM WAS MOVING NORTHEAST AT ABOUT 20 MILES AN HOUR.
THESE STORMS HAVE THE POTENTIAL TO PRODUCE LARGE HAIL...STRONG WINDS...
HEAVY RAIN AND FREQUENT LIGHTNING. PERSONS IN GOODRICH...WELDONA...LOG
LANE VILLAGE...FORT MORGAN...PLATTEVILLE...GILCREST...PECKHAM AND LA
SALLE CAN EXPECT THUNDERSTORMS TO APPROACH BY AT LEAST 430 PM MDT.
RESIDENTS OF WELD AND WESTERN MORGAN COUNTIES SHOULD BE ALERT TO RAPIDLY
CHANGING WEATHER CONDITIONS AND BE PREPARED TO MOVE TO SAFETY SHOULD
THREATENING WEATHER APPROACH.
PERSONS SHOULD ALSO CONTINUE TO MONITOR NOAA WEATHER RADIO...TELEVISION
OR LOCAL RADIO FOR LATER STATEMENTS AND POSSIBLE WARNINGS.
DEL3GADOThe office that day
Everything else NWS Denver/Boulder, CO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 29, 6:10 PM MDT | Tornado Warning | BOU | Morgan, Washington | 35 min |
| May 29, 6:41 PM MDT | Tornado Warning | BOU | Washington | 34 min |
| May 29, 7:20 PM MDT | Severe Thunderstorm Warning | BOU | Washington | 25 min |
| May 29, 7:43 PM MDT | Tornado Warning | BOU | Washington, 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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive.