Alert archive / Colorado / Severe Thunderstorm Warnings in 1990
Severe Thunderstorm Warning 25, NWS Denver/Boulder, CO
NWS Denver/Boulder, CO issued this severe thunderstorm warning at Jun 15, 1990, 4:05 PM MDT for Logan County, Colorado. It was in force for 40 min.
The area
The counties it named.
The facts
- Issued
- Jun 15, 1990, 4:05 PM MDT (22:05 UTC)
- Expired
- Jun 15, 1990, 4:45 PM MDT
- In force
- 40 min
- Issued by
- NWS Denver/Boulder, CO
- Area
- Whole counties
County Logan 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 12:00Z, 10.1 hours before the alert went out and 96 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
- 810 J/kg
- Mixed-layer CIN
- -164 J/kg
- Mixed-layer LCL
- 1002 m above ground
- 0-6 km bulk shear
- 0 kt
- 0-1 km storm-relative helicity
- 0 m²/s²
- 0-3 km storm-relative helicity
- 0 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 152207
SVRDEN
COC075-152245-
BULLETIN...IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE DENVER CO
405 PM MDT FRI JUN 15 1990
THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM
WARNING EFFECTIVE UNTIL 443 PM MDT FOR PEOPLE IN THE
FOLLOWING COUNTIES OF NORTHEAST COLORADO:
NORTHWESTERN LOGAN
INCLUDING THE FOLLOWING TOWNS/CITIES:
PEETZ
PADRONI
THE STORM WAS LOCATED 16 MILES SOUTHWEST OF PEETZ..WHICH IS 16
MILES NORTHWEST OF STERLING.
AT 4PM DOPPLER RADAR INDICATED THIS STORM TO BE VERY RAPIDLY
DEVELOPING...AND MOVING TO THE NORTHEAST AT 20 MPH. LARGE HAIL
AND DAMAGING WINDS CAN BE EXPECTED WITH THIS STORM.
A TORNADO WATCH IS IN EFFECT FOR NORTHEAST COLORADO UNTIL 8PM.
THIS STORM COULD PRODUCE A TORNADO WITH LITTLE OR NO ADVANCE
WARNING..SO BE ON THE LOOKOUT AND BE PREPARED TO MOVE TO A PLACE
OF SAFETY IF ONE IS SPOTTED.
TO REPORT SEVERE WEATHER HAVE THE NEAREST LAW ENFORCEMENT
AGENCY RELAY YOUR REPORT TO THE NATIONAL WEATHER SERVICE OFFICE
IN DENVER..OR CALL YOUR REPORT TO THE NATIONAL WEATHER SERVICE
AT 361-0663. DO NOT CALL THIS NUMBER FOR INFORMATION.
RTG
LAT..LON 4068 10314 4065 10352 4100 10341 4100 10309What 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 15, 11:11 AM MDT, 4 hours 54 minutes before
COZ011>014-152000- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE DENVER CO 1110 AM MDT FRI JUN 15 1990 ...SEVERE WEATHER THREAT IN THE NORTHEAST THIS AFTERNOON AND EVENING... PLENTIFUL MOISTURE COMBINED WITH AN UPPER LEVEL SYSTEM MOVING THROUGH THE AREA THIS AFTERNOON AND EVENING WILL CAUSE THUNDERSTORMS TO DEVELOP. SOME OF THESE THUNDERSTORMS MAY BECOME SEVERE CAPABLE OF PRODUCING LARGE HAIL...DAMAGING WINDS...DEADLY LIGHTNING AND POSSIBLY A FEW TORNADOES. THE AREA WITH THE HIGHEST RISK IS THE NORTHEAST...FROM THE FOOTHILLS EAST TO THE EASTERN BORDER AND FROM LIMON TO THE NORTHERN BORDER. PERSONS SHOULD BE ALERT TO THIS POTENTIAL FOR SEVERE WEATHER AND LISTEN TO NOAA WEATHER RADIO...TELEVISION...OR COMMERCIAL RADIO FOR LATER STATEMENTS...WATCHES OR WARNINGS. HEITKAMP
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 14, 8:50 PM MDT | Severe Thunderstorm Warning | BOU | Washington, Yuma | 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.