Alert archive / Colorado / Severe Thunderstorm Warnings in 1990
Severe Thunderstorm Warning 19, NWS Denver/Boulder, CO
NWS Denver/Boulder, CO issued this severe thunderstorm warning at Jun 8, 1990, 2:16 AM MDT for Morgan County, Colorado. It was in force for 60 min.
The area
The counties it named.
The facts
- Issued
- Jun 8, 1990, 2:16 AM MDT (08:16 UTC)
- Expired
- Jun 8, 1990, 3:16 AM MDT
- In force
- 60 min
- Issued by
- NWS Denver/Boulder, CO
- Area
- Whole counties
County Morgan 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, 8.3 hours before the alert went out and 66 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
- 55 J/kg
- Mixed-layer CIN
- -65 J/kg
- Mixed-layer LCL
- 3291 m above ground
- 0-6 km bulk shear
- 47 kt
- 0-1 km storm-relative helicity
- -40 m²/s²
- 0-3 km storm-relative helicity
- 39 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- -0.0
The text
The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.
What 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 7, 9:47 PM MDT, 4 hours 29 minutes before
COZ013-080430- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE DENVER CO 945 PM MDT THU JUN 7 1990 ...THUNDERSTORMS IN YUMA COUNTY... AT 940PM RADAR SHOWED THUNDERSTORMS DEVELOPING IN YUMA COUNTY MOVING RAPIDLY EASTWARD AT 25 MILES PER HOUR. THE STRONGEST OF THESE STORMS WAS LOCATED 10 MILES WEST OF WRAY...OR 55 MILES NORTH OR BURLINGTON. THIS STORM SHOULD BE MOVING JUST NORTH OF WRAY OR POSSIBLY THROUGH WRAY BY 10PM. THUNDERSTORMS IN YUMA COUNTY HAVE THE POTENTIAL TO PRODUCE SMALL HAIL... FREQUENT LIGHTNING...BRIEF HEAVY RAIN...AND GUSTY WINDS. IF THREATENING WEATHER APPROACHES...MOVE INDOORS UNTIL THE STORM PASSES. HOLZINGER
Special weather statement, Jun 7, 11:14 PM MDT, 3 hours 2 minutes before
COZ013-080630- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE DENVER CO 1115 PM MDT THU JUN 7 1990 ...THUNDERSTORMS REDEVELOPING IN MORGAN AND WASHINGTON COUNTIES... AT 1100 PM MDT RADAR INDICATED THAT SEVERAL THUNDERSTORMS HAD DEVELOPED IN MORGAN AND WASHINGTON COUNTIES. THE STRONGEST STORM WAS OVER AKRON IN WASHINGTON COUNTY...AND ANOTHER STRONG STORM WAS JUST SOUTHEAST OF FORT MORGAN IN MORGAN COUNTY. THESE THUNDERSTORMS WERE MOVING TOWARD THE EAST SOUTHEAST AT ABOUT 25 MPH...BUT NEW STORMS WERE DEVELOPING IN THEIR WAKE BACK TOWARD THE WEST. THUS...ANY ONE SPOT FROM FORT MORGAN TO AKRON COULD BE HIT WITH TWO OR MORE STORMS OVER THE NEXT COUPLE OF HOURS. THESE STORMS MAY* PRODUCE HEAVY RAIN AND HAIL...BUT THEIR PRIMARY DANGER CONSISTS OF FREQUENT...INTENSE LIGHTNING. MARKKANEN
Special weather statement, Jun 8, 1:45 AM MDT, 31 minutes before
COZ012-080900- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE DENVER CO 145 AM MDT FRI JUN 8 1990 ...THUNDERSTORMS PERSIST OVER NORTHEAST COLORADO... AT 135 AM MDT A LINE OF THUNDERSTORMS HAD FORMED FROM NORTH OF GREELEY TO JUST WEST OF AKRON. THE HEAVIEST STORM WAS LOCATED 10 MILES NORTH OF GREELEY NEAR AULT. THESE STORMS WERE MOVING TO THE EAST AT 30 MPH BUT WERE REDEVELOPING ALONG THE LINE TO THE WEST. ALL PEOPLE IN CENTRAL WELD...NORTHERN MORGAN AND NORTHWESTERN WASHINGTON COUNTIES OF COLORADO INCLUDING THE TOWNS OF AULT...GREELEY...GOODRICH... FORT MORGAN...BRUSH AND AKRON SHOULD BE ALERT FOR DANGEROUS LIGHTNING... HAIL AND STRONG GUSTY WINDS. HEAVY RAINS MAY CAUSE LOCAL FLOODING OF HIGHWAYS AND LOW LYING OR FLOOD PRONE AREAS. GARD...WSFO DENVER
Special weather statement, Jun 8, 1:57 AM MDT, 19 minutes before
COZ012-080900- SPECIAL WEATHER STATEMENT ...CORRECTION 2ND PARAGRAPH... NATIONAL WEATHER SERVICE DENVER CO 145 AM MDT FRI JUN 8 1990 ...THUNDERSTORMS PERSIST OVER NORTHEAST COLORADO... AT 135 AM MDT A LINE OF THUNDERSTORMS HAD FORMED FROM NORTH OF GREELEY TO JUST WEST OF AKRON. THE HEAVIEST STORM WAS LOCATED 10 MILES NORTH OF GREELEY NEAR AULT. THESE STORMS WERE MOVING TO THE EAST AT 30 MPH BUT WERE REDEVELOPING ALONG THE LINE TO THE WEST. ALL PEOPLE IN CENTRAL WELD...NORTHERN MORGAN AND NORTHWESTERN WASHINGTON COUNTIES OF COLORADO INCLUDING THE TOWNS OF AULT...GREELEY...GOODRICH... FORT MORGAN...BRUSH AND AKRON SHOULD BE ALERT FOR DANGEROUS LIGHTNING... HAIL AND STRONG GUSTY WINDS FROM THESE STORMS UNTIL 330 AM MDT. HEAVY RAINS MAY CAUSE LOCAL FLOODING OF HIGHWAYS AND LOW LYING OR FLOOD PRONE AREAS. GARD...WSFO DENVER
The office that day
Everything else NWS Denver/Boulder, CO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 7, 6:48 PM MDT | Severe Thunderstorm Warning | BOU | Adams, Morgan, Weld | 47 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.