Alert archive / Colorado / Severe Thunderstorm Warnings in 1990
Severe Thunderstorm Warning 22, NWS Denver/Boulder, CO
NWS Denver/Boulder, CO issued this severe thunderstorm warning at Jun 14, 1990, 6:50 PM MDT for Morgan County, Weld County, Colorado. It was in force for 45 min.
The area
The counties it named.
The facts
- Issued
- Jun 14, 1990, 6:50 PM MDT (00:50 UTC)
- Expired
- Jun 14, 1990, 7:35 PM MDT
- In force
- 45 min
- Issued by
- NWS Denver/Boulder, CO
- Area
- Whole counties
Counties Morgan County, CO, Weld 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, 0.8 hours before the alert went out and 95 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 150053
SVRDEN
COC087-123-150135-
BULLETIN...IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE DENVER CO
650 PM MDT THU JUN 14 1990
THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM
WARNING EFFECTIVE UNTIL 730 PM MDT FOR PEOPLE IN THE
FOLLOWING COUNTIES OF NORTHEAST COLORADO:
MORGAN
NORTHEASTERN WELD
INCLUDING THE FOLLOWING TOWNS/CITIES:
BRUSH..FT MORGAN..GOODRICH..HILLROSE..KEOTA..NEW RAYMER..
STONEHAM..AND WELDONA
THREE STRONG STORMS WERE DETECTED ON RADAR AT 641PM. ONE WAS LOCATED
LOCATED 4 MILES NORTH OF KEOTA..WHICH IS 39 MILES NORTHEAST OF GREELEY.
THE CENTRAL STORM WAS A BIT WEAKER...AND WAS LOCATED 12 MILES
SOUTHEAST OF BRIGGSDALE...OR 35 MILES EAST OF GREELEY. THE
THIRD STRONG STORM WAS LOCATED NEAR FORT MORGAN. ALL THE
STORMS WERE MOVIN NORTHEAST AT 30 MPH.
THESE STORMS HAVE ALREADY PRODUCED HAIL IN EXCESS OF ONE INCH...AND
A FUNNEL CLOUD WAS REPORTED NEAR WIGGINS AT 644 PM WITH THE FORT
MORGAN STORM.
A TORNADO WATCH REMAINS IN EFFECT FOR THIS AREA UNTIL 10PM.
THESE STORMS CAN PRODUCE A TORNADO WITH LITTLE OR NO ADVANCE
WARNING..SO BE ON THE LOOKOUT AND BE PREPARED TO MOVE TO A PLACE
OF SAF>ETY IF ONE IS SPOTTED.
RTG
LAT..LON 4014 10349 4013 10403 4096 10419 4098 10359What 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, 3 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, 1 hour 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, 1 hour 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, 8:15 PM MDT | Severe Thunderstorm Warning | BOU | Washington | 40 min |
| Jun 14, 8:50 PM MDT | Severe Thunderstorm Warning | BOU | Washington, Yuma | 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.