Alert archive / Colorado / Severe Thunderstorm Warnings in 1990
Severe Thunderstorm Warning 24, NWS Denver/Boulder, CO
NWS Denver/Boulder, CO issued this severe thunderstorm warning at Jun 14, 1990, 8:50 PM MDT for Washington County, Yuma County, Colorado. It was in force for 40 min.
The area
The counties it named.
The facts
- Issued
- Jun 14, 1990, 8:50 PM MDT (02:50 UTC)
- Expired
- Jun 14, 1990, 9:30 PM MDT
- In force
- 40 min
- Issued by
- NWS Denver/Boulder, CO
- Area
- Whole counties
Counties Washington County, CO, Yuma County, CO
The radar
The WSR-88D network and its archive begin in 1991, so there is no radar volume for this alert.
The nearest sounding before it
Denver, CO (KDEN), launched 00:00Z, 2.8 hours before the alert went out and 38 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
- 962 J/kg
- Mixed-layer CIN
- -122 J/kg
- Mixed-layer LCL
- 2454 m above ground
- 0-6 km bulk shear
- 40 kt
- 0-1 km storm-relative helicity
- 94 m²/s²
- 0-3 km storm-relative helicity
- 409 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.1
The text
As transmitted, in the capitals the NWS used until 2016.
000
TTAA00 KDEN 150254
SVRDEN
COC121-125-150330-
BULLETIN...IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE DENVER CO
850 PM MDT THU JUN 14 1990
THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM
WARNING EFFECTIVE UNTIL 930 PM MDT FOR PEOPLE IN THE
FOLLOWING COUNTIES OF NORTHEAST COLORADO:
CENTRAL WASHINGTON
WEST CENTRAL YUMA
INCLUDING THE FOLLOWING TOWNS/CITIES:
AKRON..OTIS..AND YUMA
THE STORM WAS LOCATED 6 MILES SOUTHWEST OF OTIS..WHICH IS 37
MILES SOUTH OF STERLING. AT 845 PM LIMON RADAR INDICATED THE
STORM MOVING EAST AT 30 MPH.
THIS IS A DANGEROUS STORM WITH A HISTORY OF LARGE HAIL...FUNNEL
CLOUDS AND A POSSIBLE TORNADO. BASEBALL HAIL WAS REPORTED
SOUTH OF AKRON AROUND 833PM.
A TORNADO WATCH IS IN EFFECT FOR NORTHEAST COLORADO UNTIL
MIDNIGHT.
TO REPORT SEVERE WEATHER HAVE THE NEAREST LAW ENFORCEMENT
AGENCY RELAY YOUR REPORT TO THE NATIONAL WEATHER SERVICE OFFICE
IN DENVE)R..OR CALL YOUR REPORT TO THE NATIONAL WEATHER SERVICE
AT 361-0663. DO NOT CALL THIS NUMBER FOR INFORMATION.
RTG
LAT..LON 3986 10262 3998 10323 4022 10334 4031 10263What 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 14, 3:10 PM MDT, 5 hours 40 minutes before
COZ011-012-013-014-142330- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE DENVER CO 300 PM MDT THU JUN 14 1990 ...TORNADO WATCH UNTIL 10PM THIS EVENING FOR NORTHEAST COLORADO... THE NATIONAL WEATHER SERVICE HAS ISSUED A TORNADO WATCH FOR PARTS OF NORTHEAST COLORADO FROM THE PALMER DIVIDE NORTH TO THE WYOMING BORDER...INCLUDING MANY OF THE LARGER CITIES ALONG THE FRONT RANGE EASTWARD...BUT NOT INCLUDING THE NORTHEAST CORNER OF THE STATE. ALONG THE HEAVILY POPULATED FRONT RANGE...THE GREATEST THREAT OF SEVERE WEATHER WILL BE ON THE PLAINS...WITH A LESSER THREAT NEAR THE FOOTHILLS. EASTERN AND NORTHERN METROPOLITAN DENVER ARE INCLUDED IN THE WATCH...BUT BOULDER AND GOLDEN WILL BE WEST OF THE WATCH. STRONG WINDS ALOFT...WITH MOIST EASTERLY WINDS NEAR GROUND LEVEL WILL CONTINUE THIS AFTERNOON CREATING SOME OF THE CONDITIONS NECESSARY FOR STRONG THUNDERSTORM DEVELOPMENT. REMEMBER...A TORNADO WATCH MEANS THAT CONDITIONS ARE FAVORABLE FOR THE DEVELOPMENT OF SEVERE THUNDERSTORMS INCLUDING TORNADOES. IF TORNADOES ARE SIGHTED BY SPOTTERS OR INDICATED BY RADAR...A TORNADO WARNING WILL BE ISSUED. RTG
Special weather statement, Jun 14, 5:32 PM MDT, 3 hours 18 minutes before
COZ011-012-013-014-150200- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE DENVER CO 530 PM MDT THU JUN 14 1990 ...THUNDERSTORMS ARE DEVELOPING RAPIDLY SOUTHEAST OF GREELEY... AT 525PM NATIONAL WEATHER SERVICE RADAR SHOWED TWO THUNDERSTORMS DEVELOPING VERY RAPIDLY NEAR ROGGEN...IN SOUTHWEST WELD COUNTY. THE STORMS APPEARED TO BE MOVING TO THE NORTH. ANOTHER STORM WAS DEVELOPING 5 MILES WEST OF GREELEY. A SEVERE THUNDERSTORM WATCH IS IN EFFECT FOR WELD COUNTY...AND MUCH OF NORTHERN COLORADO UNTIL 10 PM TONIGHT. HEAVY RAIN...LARGE HAIL...AND TORNADOES ARE POSSIBLE. STORMS MAY DEVELOP VERY RAPIDLY. RESIDENTS OF NORTHEAST COLORADO SHOULD TAKE COVER IF THREATENED BY SEVERE WEATHER...AND REPORT ANY SEVERE WEATHER TO YOUR NEAREST LAW ENFORCEMENT AGENCY. RTG
Special weather statement, Jun 14, 5:35 PM MDT, 3 hours 15 minutes before
COZ011-012-013-014-150200- SPECIAL WEATHER STATEMENT...CORRECTED FOR TORNADO WATCH NATIONAL WEATHER SERVICE DENVER CO 530 PM MDT THU JUN 14 1990 ...THUNDERSTORMS ARE DEVELOPING RAPIDLY SOUTHEAST OF GREELEY... AT 525PM NATIONAL WEATHER SERVICE RADAR SHOWED TWO THUNDERSTORMS DEVELOPING VERY RAPIDLY NEAR ROGGEN...IN SOUTHWEST WELD COUNTY. THE STORMS APPEARED TO BE MOVING TO THE NORTH. ANOTHER STORM WAS DEVELOPING 5 MILES WEST OF GREELEY. A TORNADO WATCH IS IN EFFECT FOR WELD COUNTY...AND MUCH OF NORTHERN COLORADO UNTIL 10 PM TONIGHT. HEAVY RAIN...LARGE HAIL...AND TORNADOES ARE POSSIBLE. STORMS MAY DEVELOP VERY RAPIDLY. RESIDENTS OF NORTHEAST COLORADO SHOULD TAKE COVER IF THREATENED BY SEVERE WEATHER...AND REPORT ANY SEVERE WEATHER TO YOUR NEAREST LAW ENFORCEMENT AGENCY. RTG
The office that day
Everything else NWS Denver/Boulder, CO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 14, 6:05 PM MDT | Severe Thunderstorm Warning | BOU | Morgan, Weld | 45 min |
| Jun 14, 6:50 PM MDT | Severe Thunderstorm Warning | BOU | Morgan, Weld | 45 min |
| Jun 14, 8:15 PM MDT | Severe Thunderstorm Warning | BOU | Washington | 40 min |
| Jun 15, 4:05 PM MDT | Severe Thunderstorm Warning | BOU | Logan | 40 min |
| Jun 15, 5:10 PM MDT | Severe Thunderstorm Warning | BOU | Sedgwick | 20 min |
| Jun 15, 5:55 PM MDT | Severe Thunderstorm Warning | BOU | Weld | 45 min |
Nearby
Severe Thunderstorm Warnings in Colorado, 1990Every severe thunderstorm warning in 1990
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.