Alert archive / Colorado / Severe Thunderstorm Warnings in 1990
Severe Thunderstorm Warning 6, NWS Denver/Boulder, CO
NWS Denver/Boulder, CO issued this severe thunderstorm warning at May 26, 1990, 5:07 PM MDT for Washington County, Colorado. It was in force for 30 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 26, 1990, 5:07 PM MDT (23:07 UTC)
- Expired
- May 26, 1990, 5:37 PM MDT
- In force
- 30 min
- Issued by
- NWS Denver/Boulder, CO
- Area
- Whole counties
County Washington County, CO
The radar
The WSR-88D network and its archive begin in 1991, so there is no radar volume for this alert.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| May 26, 5:25 PM MDT | Thunderstorm Wind 52 | Washington, 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 12:00Z, 11.1 hours before the alert went out and 11 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
- 77 J/kg
- Mixed-layer CIN
- -113 J/kg
- Mixed-layer LCL
- 751 m above ground
- 0-6 km bulk shear
- 39 kt
- 0-1 km storm-relative helicity
- -66 m²/s²
- 0-3 km storm-relative helicity
- 78 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 262309
SVRDEN
COC121-262337-
BULLETIN...IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE DENVER CO
507 PM MDT SAT MAY 26 1990
THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM
WARNING EFFECTIVE UNTIL 537 PM MDT FOR PEOPLE IN THE
FOLLOWING COUNTIES OF EAST CENTRAL COLORADO:
SOUTHEASTERN WASHINGTON
INCLUDING THE FOLLOWING TOWNS/CITIES:
COPE
AT 505 PM MDT RADAR INDICATED A SEVERE THUNDERSTORM ABOUT
13 MILES NORTHWEST OF COPE...OR 53 MILES NORTHEAST OF LIMON.
THE STORM WAS MOVING VERY LITTLE.
IF SEVERE WEATHER APPROACHES YOUR AREA..GO TO A STURDY
SHELTER AWAY FROM CREEK BEDS AND OTHER FLOOD PRONE AREAS.
REMEMBER..A SEVERE THUNDERSTORM CAN PRODUCE LARGE DAMAGING
HAIL..DAMAGING WINDS OF OVER 60 MPH..DEADLY LIGHTNING..AND
HEAVY RAINS THAT CAN QUICKLY FLOOD A LOW LYING AREA.
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 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. HDO NOT CALL THIS NUMBER FOR INFORMATION.
THALER
LAT..LON 3960 10283 3960 10316 3992 10316 3993 10284What 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, May 26, 2:40 PM MDT, 2 hours 27 minutes before
COZ011-012-262145- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE DENVER CO 237 PM MDT SAT MAY 26 1990 ...STRONG THUNDERSTORMS DEVELOPING SOUTH AND EAST OF DENVER... THUNDERSTORMS ARE DEVELOPING OVER NORTHERN DOUGLAS COUNTY AND SOUTH CENTRAL ARAPAHOE COUNTY THIS SATURDAY AFTERNOON. THE STRONGEST CELLS AT 235 MDT WERE LOCATED NEAR SEDALIA...20 MILES SOUTH OF DENVER AND 35 MILES SOUTHEAST OF DENVER. THE STORMS ARE MOVING TO THE NORTHEAST AT AROUND 25 MPH WHILE OTHER STORMS WILL LIKELY BE FORMING SOUTH AND EAST OF DENVER OVER THE NEXT HOUR OR SO. PERSONS SOUTH AND EAST OF DENVER IN THE TOWNS OF PARKER...SEDALIA AND THE EXTREME SOUTHEAST PORTIONS OF AURORA SHOULD BE ON THE LOOKO:UT FOR THREATENING WEATHER AND MOVE TO SAFE SHELTER IF BAD WEATHER APPROACHES. IF IN BOATS ON OPEN WATER...GO ASHORE IF LIGHTNING IS SPOTTED OR THUNDER IS HEARD NEARBY. THALER
Special weather statement, May 26, 3:04 PM MDT, 2 hours 3 minutes before
COZ012-013-262200- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE DENVER CO 305 PM MDT SAT MAY 26 1990 ...STRONG THUNDERSTORM NEAR AKRON... AT 3 PM MDT SATURDAY AFTERNOON RADAR INDICATED A STRONG THUNDERSTORM NEAR THE TOWN OF AKRON IN WASHINGTON COUNTY. THE STORM WAS NOT MOVING MUCH DURING THE LAST 15 MINUTES. PERSONS IN AND AROUND AKRON SHOULD BE ALERT FOR STRONG GUSTY WINDS... HAIL...HEAVY RAIN AND LIGHTNING AS THE STORM PASSES NEAR `THE TOWN DURING THE NEXT HOUR OR SO. THALER
Special weather statement, May 26, 3:17 PM MDT, 1 hour 50 minutes before
COZ012-013-262200- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE DENVER CO 310PM MDT SAT MAY 26 1990 ...THUNDERSTORMS TO INTENSIFY IN NORTHEAST PLAINS... AT 3PM MDT A STRONG THUNDERSTORM WAS LOCATED NEAR THE TOWN OF AKRON COLORADO IN WASHINGTON. THIS THUNDERSTORM WAS MOVING SLOWLY EAST AND IS EXPECTED TO INTENSIFY BY 3PM MDT NEAR THE WASHINGTON AND YUMA COUNTY LINES. THE INTENSIFICATION WILL BE DUE TO THE THUNDERSTORM ENCOUNTERING A WESTWARD MOVING BAND OF MOIST AIR THAT WAS MOVING ACROSS YUMA COUNTY. PERSONS IN EASTERN WASHINGTON AND WESTERN YUMA COUNTIES SHOULD BE ALERT FOR THREATENING WEATHER CONDITIONS AND MOVE TO A PLACE OF SHELTER IF NECESSARY. WHEN THE THUNDERSTORM INTENSIFIES IT IS LIKELY TO PRODUCE BRIEF RAIN AND STRONG GUSTY WINDS AND PERHAPS SOME LARGE HAILSTONES. END...GCF...WSFO DENVER
Special weather statement, May 26, 3:19 PM MDT, 1 hour 48 minutes before
COZ012-013-262200- SPECIAL WEATHER STATEMENT...CORRECTION NATIONAL WEATHER SERVICE DENVER CO 320PM MDT SAT MAY 26 1990 ...THUNDERSTORMS TO INTENSIFY IN NORTHEAST PLAINS... AT 3PM MDT A STRONG THUNDERSTORM WAS LOCATED NEAR THE TOWN OF AKRON COLORADO IN WASHINGTON. THIS THUNDERSTORM WAS MOVING SLOWLY EAST AND IS EXPECTED TO INTENSIFY BY 4PM MDT NEAR THE WASHINGTON AND YUMA COUNTY LINES. THE INTENSIFICATION WILL BE DUE TO THE THUNDERSTORM ENCOUNTERING A WESTWARD MOVING BAND OF MOIST AIR THAT WAS MOVING ACROSS YUMA COUNTY. PERSONS IN EASTERN WASHINGTON AND WESTERN YUMA COUNTIES SHOULD BE ALERT FOR THREATENING WEATHER CONDITIONS AND MOVE TO A PLACE OF SHELTER IF NECESSARY. WHEN THE THUNDERSTORM INTENSIFIES IT IS LIKELY TO PRODUCE BRIEF RAIN AND STRONG GUSTY WINDS AND PERHAPS SOME LARGE HAILSTONES. END...GCF...WSFO DENVER
Special weather statement, May 26, 3:50 PM MDT, 1 hour 17 minutes before
COZ012-013-262230- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE DENVER CO 350 PM MDT SAT MAY 26 1990 ...THUNDERSTORM CONTINUES OVER WASHINGTON COUNTY... A STRONG THUNDERSTORM CONTINUES ABOUT 15 MILES SOUTHEAST OF AKRON THIS SATURDAY AFTERNOON AND IS MOVING ONLY VERY SLOWLY TO THE SOUTHEAST. DOPPLER RADAR SHOWED THIS STORM TO BE OF MODERATE TO STRONG INTENSITY AND ALSO INDICATED THAT THE STORM WAS ROTATING...A FEATURE WHICH OFTEN TIMES DEVELOPS PRIOR TO THE FORMATION OF A TORNADO. PERSONS IN EAST CENTRAL WASHINGTON COUNTY AND EXTREME WESTERN YUMA COUNTY SHOULD BE ON THE LOOKOUT FOR SEVERE WEATHER AND MOVE TO A PLACE OF SAFETY IF THREATENING WEATHER APPROACHES. LARGE HAIL...HEAVY RAIN AND STRONG GUSTY WINDS ARE A GOOD BET WITH THIS STORM AND A TORNADO IS POSSIBLE. KEEP AN EYE ON THE SKY. THALER
Special weather statement, May 26, 4:50 PM MDT, 17 minutes before
COZ012-013-270000- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE DENVER CO 450 PM MDT SAT MAY 26 1990 ...THUNDERSTORM CONTINUES OVER WASHINGTON COUNTY... A STRONG THUNDERSTORM WAS LOCATED 25 MILES SOUTHEAST OF AKRON IN SOUTHEAST WASHINGTON COUNTY AT 445 PM MDT SATURDAY AFTERNOON. THE STORM WAS MOVING TO THE EAST AT ABOUT 5 MPH. WEATHER RADAR INDICATED THAT THE STORM MAY BE PRODUCING LARGE HAIL. ADDITIONALLY...STRONG WINDS AND HEAVY 0RAIN ARE LIKELY WITH THIS STORM. PERSONS IN AND AROUND THE TOWNS OF ELBA...ANTON AND COPE SHOULD BE ON THE LOOKOUT FOR THREATENING WEATHER FOR THE NEXT HOUR OR SO. SEEK SAFE SHELTER IF BAD WEATHER APPROACHES YOUR AREA. THALER
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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive.