Alert archive / Colorado / Severe Thunderstorm Warnings in 1990
Severe Thunderstorm Warning 28, NWS Denver/Boulder, CO
NWS Denver/Boulder, CO issued this severe thunderstorm warning at Jul 3, 1990, 7:45 PM MDT for Logan County, Phillips County, Colorado. It was in force for 59 min.
The area
The counties it named.
The facts
- Issued
- Jul 3, 1990, 7:45 PM MDT (01:45 UTC)
- Expired
- Jul 3, 1990, 8:44 PM MDT
- In force
- 59 min
- Issued by
- NWS Denver/Boulder, CO
- Area
- Whole counties
Counties Logan County, CO, Phillips 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, 1.8 hours before the alert went out and 97 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
- 19 J/kg
- Mixed-layer CIN
- -214 J/kg
- Mixed-layer LCL
- 2529 m above ground
- 0-6 km bulk shear
- 7 kt
- 0-1 km storm-relative helicity
- 41 m²/s²
- 0-3 km storm-relative helicity
- 135 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 040147
SVRDEN
COC095-075-040244-
BULLETIN...IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE DENVER CO
745 PM MDT TUE JUL 03 1990
THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM
WARNING EFFECTIVE UNTIL 845 PM MDT FOR PEOPLE IN THE
FOLLOWING COUNTIES OF NORTHEAST COLORADO:
EXTREME WESTERN PHILLIPS
SOUTHERN LOGAN
INCLUDING THE FOLLOWING TOWNS/CITIES:
ATWOOD..FLEMING..ILIFF..AND STERLING...AND HAXTUN.
THE STORM WAS LOCATED 9 MILES SOUTHEAST OF STERLING.
AT 740PM RADAR INDICATED A SEVERE THUNDERSTORM WAS LOCATED 9 MILES
SOUTHEAST OF STERLING IN LOGAN COUNTY.
THE STORM WAS MOVING TOWARD THE EAST NORTHEAST AT 20 TO 30 MILES PER
HOUR.
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.
INTENSE LIGHTNING IS REPORTED WITH THIS STORM. IF OUTDOORS..
STAY AWAY FROM HIGH OBJECTS. MOVE INDOORS IF POSSIBLE. WHEN
INDOORS..STAY AWAY FROM WINDOWS AND DOORS AND AVOID USING
TELEPHONES AND ELECTRICAL EQUIPMENT.
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.
HOLZINGER
LAT..LON 4046 10267 4045 10329 4078 10327 4079 10267What 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, Jul 3, 4:38 PM MDT, 3 hours 7 minutes before
COZ012-032345- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE DENVER CO 435 PM MDT TUE JUL 3 1990 ...MORE THUNDERSTORMS THIS AFTERNOON THAN HAS BEEN THE CASE RECENTLY... AT 430PM THERE WAS A ROUGH LINE OF THUNDERSTORMS OVER THE NORTHEAST PLAINS OF COLORADO. THE LINE EXTENDED FROM NEAR GROVER IN WELD COUNTY ...OR 45 MILES EAST NORTHEAST OF FORT COLLINS...TO NEAR BYERS IN EASTERN ARAPAHOE COUNTY...OR 40 MILES EAST OF DENVER. THESE THUNDERSTORMS WERE MOVING TOWARD THE NORTHEAST AT 15 TO 20 MILES PER HOUR. THE LARGEST THUNDERSTORM WAS 10 MILES NORTHEAST OF BYERS. BRIEF HEAVY RAIN COULD ACCOMPANY FREQUENT LIGHTNING...GUSTY WINDS...AND SOME SMALL HAIL. ESTIMATES FROM DOPPLER RADAR INDICATE RAINFALL WITH THESE STORMS HAS GENERALLY BEEN LESS THAN 1/2 INCH...BUT LOCALLY JUST OVER AN INCH OF RAIN MAY HAVE FALLEN...NOT ENOUGH TO CAUSE FLOODING. PEOPLE IN THE NORTHEAST PLAINS SHOULD MOVE INDOORS IF ANY OF THESE THUNDERSTORMS APPROjACHES. HOLZINGER
Special weather statement, Jul 3, 6:44 PM MDT, 1 hour 1 minute before
COZ011-012-013-040145- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE DENVER CO 645 PM MDT TUE JUL 3 1990 ...THUNDERSTORMS CONTINUING IN NORTHEAST COLORADO... AT 640PM A LINE OF THUNDERSTORMS WAS CONTINUING TO MOVE EASTWARD THROUGH NORTHEAST COLORADO. THE LINE STRETCHED FROM WESTERN LOGAN COUNTY... ABOUT 15 MILES WEST OF STERLING...TO NEAR ANTON IN SOUTHERN WASHINGTON COUNTY...OR 60 MILES SOUTH OF STERLING. THE STRONGEST STORM WAS OVER I-76 IN EXTREME NORTHWEST WASHINGTON COUNTY...OR ABOUT 20 MILES SOUTHWEST OF STERLING. THE LINE OF THUNDERSTORMS SHOULD REACH STERLING AND AKRON BY 730PM. BRIEF HEAVY RAIN...GUSTY WINDS...AND FREQUENT LIGHTNING ARE EXPECTED AS THIS LINE OF THUNDERSTORMS CONTINUES MOVING EAST AT ABOUT 20 MILES PER HOUR. SMALL HAIL IS ALSO POSSIBLE. BASED UPON DOPPLER RADAR...RAINFALL WITH THESE STORMS IS MOSTLY LESS THAN ONE INCH BUT LOCAL RAINFALL AMOUNTS COULD BE BETWEEN ONE AND TWO INCHES. SIGNIFICANMT FLOODING IS NOT EXPECTED...BUT A FEW GULLIES MAY BE NEAR BANKFULL. TAKE NECESSARY PRECAUTIONS IF ONE OF THESE THUNDERSTORMS APPROACHES. THE MAIN DANGER FROM THESE STORMS IS LIGHTNING. HOLZINGER
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.