Severe Thunderstorm Warning 35, NWS Denver/Boulder, CO

Issued

Jul 11, 1990, 2:15 PM MDT (20:15 UTC)

Expired

Jul 11, 1990, 3:45 PM MDT

In force

90 min

Issued by

NWS Denver/Boulder, CO

Area

Whole counties

Counties Adams County, CO, Denver County, CO, Jefferson County, CO

The WSR-88D network and its archive begin in 1991, so there is no radar volume for this alert.

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.

000 
TTAA00 KDEN 112015
SVRDEN
COC059-001-031-112145-

BULLETIN...IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE DENVER CO
215 PM MDT WED JUL 11 1990

THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM
WARNING EFFECTIVE UNTIL 245 PM  MDT FOR PEOPLE IN THE
FOLLOWING COUNTIES OF NORTHEAST COLORADO:

     NORTHEASTERN JEFFERSON
     DENVER
     WEST CENTRAL ADAMS

INCLUDING THE FOLLOWING TOWNS/CITIES:

     ARVADA..COMMERCE CITY..DENVER..LAKEWOOD..NORTHGLENN.. 
     SHERIDAN..THORNTON..WESTMINSTER..AND WHEAT RIDGE

THE STORM WAS LOCATED JUST NORTHWEST OF DENVER.

AT 215 PM MDT NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM JUST NORTHWEST OF DENVER...MOVING TOWARD THE 
SOUTHEAST AT 25 MPH.  THIS STORM HAS PRODUCED 1 INCH DIAMETER HAIL
AT MANY SPOTS IN SOUTHEASTERN BOULDER COUNTY.

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 IWEATHER SERVICE OFFICE
IN DENVER..OR CALL YOUR REPORT TO THE NATIONAL WEATHER SERVICE
AT 361-0663.  DO NOT CALL THIS NUMBER FOR INFORMATION.

MARKKANEN 

LAT..LON  3963 10487 3964 10517 3991 10521 3992 10485

In the hours before

COZ011-014-111930-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE DENVER CO
1245 PM MDT WED JUL 11 1990

...THUNDERSTORMS ARE BEGINNING TO DEVELOP ALONG THE FOOTHILLS...

AT 1241 PM NATIONAL WEATHER SERVICE DOPPLER RADAR SHOWED
THUNDERSTORMS BEGINNING TO FIRE OVER THE NORTHERN FOOTHILLS AND
PALMER DIVIDE.  THE STRONGEST STORM WAS LOCATED 7 MILES EAST OF
ESTES PARK...AND MOVING SOUTHEAST AT 20 MPH.

STORMS WILL CONTINUE TO DEVELOP ALONG THE FOOTHILLS EARLY
THIS AFTERNOON...AND MOVE OUT INTO THE PLAINS BY MID
AFTERNOON.  STORMS SHOULD CONTINUE MOVING SOUTHEAST AT 15 TO 25 MPH.
LOCALLY HEAVY RAIN...HAIL...AND FREQUENT LIGHTNING WILL BE POSSIBLE
WITH STORMS THIS AFTERNOON.

RTG

Severe Thunderstorm Warnings in Colorado, 1990Every severe thunderstorm warning in 1990

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.