Severe Thunderstorm Warning 127, NWS Denver/Boulder, CO

Issued

Aug 1, 2001, 7:48 PM MDT (01:48 UTC)

Expired

Aug 1, 2001, 8:15 PM MDT

In force

27 min

Issued by

NWS Denver/Boulder, CO

Area

Whole counties

County Washington County, CO

The Denver radar (KFTG), 117 km from the middle of the area, began a volume at 01:52 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 
WUUS55 KBOU 020152 CCA
SVRDEN

COC121-020215-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE DENVER CO...CORRECTED
748 PM MDT WED AUG 1 2001

THE NATIONAL WEATHER SERVICE IN DENVER HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  CENTRAL WASHINGTON COUNTY IN NORTHEAST COLORADO

* UNTIL 815 PM MDT

* AT 748 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM 6 MILES NORTH OF LINDON...OR ABOUT 25 MILES
  SOUTHWEST OF AKRON...MOVING NORTHEAST AT 20 MPH.

LOCATIONS IN THE WARNING INCLUDE...BUT ARE NOT LIMITED 
TO...AKRON...ANTON...ELBA...LINDON...OTIS AND PLATNER.

IN ADDITION...A 740 PM MDT...GOLFBALL SIZE HAIL WAS REPORTED IN OTIS.

SEVERE THUNDERSTORMS CAN 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.

HAIL...INTENSE RAIN AND STRONG DAMAGING WINDS ARE LIKELY WITH THIS
STORM. TAKE COVER IN A SUBSTANTIAL SHELTER UNTIL THE STORM PASSES.

THIS WARNING REPLACES THE PREVIOUS WARNING ISSUED FOR CENTRAL 
WASHINGTON COUNTY.

LAT...LON 3983 10348 3966 10345 396e7 10310 3994 10313
          3994 10327 3994 10337

COOPER

NWS Denver/Boulder, CO wrote its last area forecast discussion before this severe thunderstorm warning went out at Aug 1, 2:55 PM MDT, 4 hours 53 minutes earlier.

NORTHEAST AND NORTH CENTRAL COLORADO AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE DENVER COLORADO
255 PM MDT WED AUG 01 2001

PERSISTENT UPR LVL RDG WL BE DOMINATING NERN AND N-CENTRAL CO WX FOR
THE NEXT SEVERAL DAYS.  FOR THE NEXT DAY OR SO...PLUME OF MID AND
UPR LVL MSTR WL BE CROSSING THE AREA TO MAINTAIN THE CHANCE OF AFTN
AND EVENING SHOWERS.  AT THIS TIME...SHOWER ACTIVITY OVR MTNS HAS BE
MOVG ALONG WHILE WEAK UPSLP FLOW CONTS ACRS THE PLAINS.  ACARS SNDGS
SHOWED SOME MID LVL CAPPING OF THE AMS TIL ABT 20Z...BUT LATEST DATA
SHOWS ABT 600 J/KG CAPE AND LTL CONVECTIVE INHIBITION.  TUTT LOW IS
PRESENTLY QUITE ORGANIZED OVR WRN NM...BUT MODELS INDICATE THAT IT
WL LOSE ITS IDENTITY ON THUR AS IT ROTATES NWD ARND THE UPR RDG.
RH FIELDS CONT HINTING AT A CONTINUATION OF MONSOONAL MSTR ALOFT.
AS LONG AS THIS CONTS...WL HAVE TO CONT MENTIONING AFTN AND EVENING
SHOWERS IN THE FCST.

OVR THE WEEKEND AND INTO NEXT WEEK...THE MRF SHOWS THE CENTER OF THE
UPR LVL RIDGE BLDG NWWD AND SETTING UP OVR SWRN WY.  HGTS ALSO RISE
TO NEAR 600 DM.  THIS SHIFT IN THE UPR AIR PATTERN COULD DECREASE
THE CHANCES OF SHOWERS...BUT DIFFERENCES ARE NOT WORTH M7ENTIONING AT
THIS POINT.  TEMPS ARE GOING TO CONT ABV SEASONAL VALUES...AND
CURRNT FCST HAS THESE FEATURES COVERED.                   KDRBY

.DEN...NONE

Severe Thunderstorm Warnings in Colorado, 2001Every severe thunderstorm warning in 2001

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.