Severe Thunderstorm Warning 69, NWS Denver/Boulder, CO

Issued

Jul 19, 2000, 7:45 PM MDT (01:45 UTC)

Expired

Jul 19, 2000, 8:30 PM MDT

In force

45 min

Issued by

NWS Denver/Boulder, CO

Area

Whole counties; the outline is the Mesonet’s reconstruction

County Morgan County, CO

The Denver radar (KFTG), 62 km from the middle of the area, began a volume at 01:47 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 200145
SVRDEN
COC087-200230-
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE DENVER CO
745 PM MDT WED JUL 19 2000

THE NATIONAL WEATHER SERVICE IN DENVER HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTHERN MORGAN COUNTY IN NORTHEAST COLORADO
  THIS INCLUDES THE CITY OF FORT MORGAN

* UNTIL 830 PM MDT

* AT 745 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM 9 MILES WEST OF ADENA SCHOOL...OR ABOUT 14
  MILES SOUTHWEST OF FORT MORGAN...MOVING NORTHEAST AT 30 MPH.

LOCATIONS IN THE WARNING INCLUDE...BUT ARE NOT LIMITED TO...
TWELVE-MILE CORNER...LOG LANE VILLAGE...FORT MORGAN...BRUSH AND ADENA
SCHOOL.

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 UP TO 1 INCH IN DIAMETER HAS BEEN REPORTED WITH THIS STORM 
INTHE SOUTHWEST CORNER OF MOGAN COUNTY.  IF YOU ARE IN THE PATH OF 
THE STORM...PUT YOUR CAR IN A GARAGE AND MOVE TO A SUBSTANTIAL 
SHELTER.

LAT...LON 4015 10414 4002 10414 4002 10378 4017 10354
  s        4033 10372 4027 10403

RJK

NWS Denver/Boulder, CO wrote its last area forecast discussion before this severe thunderstorm warning went out at Jul 19, 3:00 PM MDT, 4 hours 45 minutes earlier.

NORTHEAST AND NORTH CENTRAL COLORADO AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE DENVER COLORADO
300 PM MDT WED JUL 19 2000

DESPITE SOUTHEAST SURFACE WINDS OVER EASTERN PLAINS...SURFACE
DEWPOINTS HAVE DROPPED DRAMATICALLY ALONG FRONT RANGE...AVERAGING IN
THE LOWER 30S.  DEWPOINTS STILL HIGH EAST OF A FORT MORGAN TO LIMON
LINE...LOWER TO MID 50S.  SHEAR PROFILE DECENT AND FORECAST
SOUNDINGS THIS AFTERNOON AND EVENING SHOW CAPES OF AROUND 2500
JOULES.  CONVECTION DEVELOPING OVER FOOTHILLS...WILL PROBABLY BECOME
SEVERE EAST OF ABOVE MENTIONED LINE WHERE BEST SHEAR AND LOW LEVEL
MOISTURE TO BE FOUND.  LARGE HAIL AND DAMAGING WINDS WILL BE THE
MAIN THREAT...ALTHOUGH CANNOT RULE OUT TORNADOES ESPECIALLY ALONG
SURFACE BOUNDARIES.  WILL GO WITH HIGHER POPS THOSE ZONES AND
MENTION SEVERE.  CONVECTION SHOULD LINGER OUT EAST LATE THIS
EVENING...WITH SOME LOW CLOUDS AND FOG.

ON THURSDAY...LITTLE CHANCE IN WIND PROFILE WITH LOW LEVEL EAST
SOUTHEAST FLOW AND WESTERLY ALOFT.  MODEL SOUNDINGS INDICATE UP TO
2000 JOULES DURING AFTERNOON.  EXPECT CONVECTION TO FIRST DEVELOP
OVER MOUNTAINS AND FOOTHILLS DURING AFTERNOON...THEN MOVE EASTWARD.
SHORTWAVE PROGGED TO MOVE ACROSS THE NORTHERN ZONES DURING WHICH
SHOULD HELP TO INTENSIFY CONVECTION.  EASTERN PLAINS IN DAY TWO
SEVERE...CANNOT RULE AGAINST THIS THINKING.  STILL A BIT EARLY TO
MENTION SEVERE IN ZONES FOR TOMORROW AFTERNOON.

ON FRIDAY...MOIST SOUTHEAST SURFACE FLOW PROGGED TO PERSIST OVER
EASTERN PLAINS...WITH WESTERLY FLOW ALOFT.  COULD BE ANOTHER FAIRLY
ACTIVE DAY...ALTHOUGH FORECAST SOUNDINGS INDICATE WARMING ALOFT.
THIS CAP MAY DELAY STORM DEVELOPMENT.

WINDS ALOFT THROUGH PERIOD SUFFICIENT TO KEEP STORMS MOVING...SO NOT
EXPECTING FLASH FLOODING ALONG FOOTHILLS.

FOR THE EXTENDED...UPPER LEVEL RIDGE TO REMAIN AT OR NEAR THE FOUR
CORNERS...WARMING THE AIRMASS AND EFFECTIVELY SHUNTING MONSOON-TYPE
MOISTURE.  HOWEVER...MODELS INDICATE SEVERAL MOIST SURGES TO MOVE
ACROSS EASTERN COLORADO.  EXPECT CHANCE OF AFTERNOON THUNDERSTORMS
THROUGH THE PERIOD...MAINLY FOOTHILLS AND PLAINS.  D-L

.DEN...NONE.

Severe Thunderstorm Warnings in Colorado, 2000Every severe thunderstorm warning in 2000

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.