Severe Thunderstorm Warning 131, NWS Denver/Boulder, CO

Issued

Aug 16, 1997, 9:10 PM MDT (03:10 UTC)

Expired

Aug 16, 1997, 10:00 PM MDT

In force

50 min

Issued by

NWS Denver/Boulder, CO

Area

Whole counties; the outline is the Mesonet’s reconstruction

County Weld County, CO

The Cheyenne radar (KCYS), 70 km from the middle of the area, began a volume at 03:12 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

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.

000 
TTAA00 KDEN 170310 RRA
SVRDEN
COC123-170400-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE DENVER CO
910 PM MDT SAT AUG 16 1997

THE NATIONAL WEATHER SERVICE IN DENVER HAS ISSUED A SEVERE
THUNDERSTORM WARNING EFFECTIVE UNTIL 1000 PM MDT FOR PEOPLE IN THE
FOLLOWING COUNTIES...

IN NORTHEAST COLORADO
     CENTRAL WELD

INCLUDING THE FOLLOWING LOCATIONS
     GREELEY...AULT...BARNESVILLE...EATON...EVANS...GALETON...GILL...
     KERSEY...LA SALLE...LUCERNE...PIERCE AND PURCELL

AT 907 PM MDT NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM 3 MILES WEST OF EVANS...OR ABOUT 3 MILES SOUTH OF
GREELEY.  ANOTHER SEVERE THUNDERSTORM WAS LOCATED 6 MILES WEST 
NORTHWEST OF PURCELL

THE STORM WAS MOVING EAST AT 20 MILES PER HOUR.

THIS REPLACES THE WARNING ISSUED FOR WEST CENTRAL WELD COUNTY AT 
8:31 PM MDT.

IF SEVERE WEATHER APPROACHES YOUR AREA...GO INSIDE A STURDY SHELTER
AWAY FROM CREEK BEDS AND OTHER FLOOD-PRONE AREAS. REMEMBER...A SEVERE
THUNDERSTORM CAN PRODUCE LARGE DAMAGING HAIL...DAMAGING WINDS OVER 60
MPH...DEADLY LIGHTNING...AND VERY HEAVY RAIN.  FLOODING OF SMALL CREEKS
...STREAMS AND LOW LYING AREAS WILL ALSO OCCUR.  

SEVERE THUNDERSTORMS CAN AND OCCASIONALLY DO PRODUCE TORNADOES WITH
LITTLE OR NO ADVANCE WARNING. PREPARE TO MOVE TO A PLACE OF SAFETY IN
A STURDY STRUCTURE SUCH AS A BASEMENT OR SMALL INTERIOR ROOM IF A
TORNADO IS SPOTTED.

REPORT SEVERE WEATHER TO THE NEAREST LAW ENFORCEMENT AGENCY. THEY
WILL RELAY YOUR REPORT TO THE NATIONAL WEATHER SERVICE FORECAST
OFFICE IN DENVER.

LAT...LON 4070 10435 4032 10438 4031 10476 4039 10482
          4069 10478 4075 10457

FMC

In the hours before

COZ035-036-038-039-040-043-162330-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE DENVER CO
435 PM MDT SAT AUG 16 1997

...SCATTERED THUNDERSTORMS DEVELOPING IN THE FOOTHILLS LATE THIS
AFTERNOON...

AT 430 PM MDT NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
STRONG THUNDERSTORM 4 MILES EAST OF BOULDER...OR ABOUT 24 MILES
NORTHWEST OF DENVER.

THE STORM WAS MOVING SOUTHEAST AT 15 MILES PER HOUR.

PERSONS IN OR NEAR ARVADA...BOULDER...BROOMFIELD...LONGMONT...
ELDORADO SPRINGS...ERIE...JAMESTOWN...LAFAYETTE...LOUISVILLE...NIWOT
...ROCKY FLATS AND SUPERIOR

SHOULD BE ON THE LOOKOUT FOR THREATENING WEATHER AND MOVE TO A PLACE
OF SAFETY IF BAD WEATHER APPROACHES.  DANGEROUS LIGHTNING...SMALL
HAIL...LOCALLY HEAVY RAIN...AND GUSTY WINDS WILL OCCUR WITH THIS
STORM.

RADAR INDICATED THIS STORM HAD PRODUCED UP TO 1 INCH OF RAINFALL IN
THE LAST HOUR.  ELSEWHERE SCATTERED THUNDERSTORMS WILL CONTINUE TO
DEVELOP OVER THE FOOTHILLS LATE THIS AFTERNOON AND DRIFT INTO THE
URBAN CORRIDOR.

HEAVY RAINS MAY FLOOD LOW LYING AREAS SUCH AS DITCHES AND
UNDERPASSES.  AVOID THESE AREAS AND DO NOT CROSS FLOODED ROADS.
WATER LEVELS OF SMALL STREAMS AND RIVERS MAY ALSO RISE...THEREFORE
SEEK HIGHER GROUND IF THREATENED BY FLOOD WATERS.

FMC

COZ035-036-038-039-040-043-162330-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE DENVER CO
435 PM MDT SAT AUG 16 1997

...SCATTERED THUNDERSTORMS DEVELOPING IN THE FOOTHILLS LATE THIS
AFTERNOON...

AT 430 PM MDT NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
STRONG THUNDERSTORM 4 MILES EAST OF BOULDER...OR ABOUT 24 MILES
NORTHWEST OF DENVER.

THE STORM WAS MOVING SOUTHEAST AT 15 MILES PER HOUR.

PERSONS IN OR NEAR ARVADA...BOULDER...BROOMFIELD...LONGMONT...
ELDORADO SPRINGS...ERIE...JAMESTOWN...LAFAYETTE...LOUISVILLE...NIWOT
...ROCKY FLATS AND SUPERIOR

SHOULD BE ON THE LOOKOUT FOR THREATENING WEATHER AND MOVE TO A PLACE
OF SAFETY IF BAD WEATHER APPROACHES.  DANGEROUS LIGHTNING...SMALL
HAIL...LOCALLY HEAVY RAIN...AND GUSTY WINDS WILL OCCUR WITH THIS
STORM.

RADAR INDICATED THIS STORM HAD PRODUCED UP TO 1 INCH OF RAINFALL IN
THE LAST HOUR.  ELSEWHERE SCATTERED THUNDERSTORMS WILL CONTINUE TO
DEVELOP OVER THE FOOTHILLS LATE THIS AFTERNOON AND DRIFT INTO THE
URBAN CORRIDOR.

HEAVY RAINS MAY FLOOD LOW LYING AREAS SUCH AS DITCHES AND
UNDERPASSES.  AVOID THESE AREAS AND DO NOT CROSS FLOODED ROADS.
WATER LEVELS OF SMALL STREAMS AND RIVERS MAY ALSO RISE...ZTHEREFORE
SEEK HIGHER GROUND IF THREATENED BY FLOOD WATERS.

FMC

Severe Thunderstorm Warnings in Colorado, 1997Every severe thunderstorm warning in 1997

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; radar from the NEXRAD Level II archive.