Severe Thunderstorm Warning 47, NWS Denver/Boulder, CO

Issued

Aug 4, 2002, 8:54 PM MDT (02:54 UTC)

Expired

Aug 4, 2002, 9:45 PM MDT

In force

51 min

Issued by

NWS Denver/Boulder, CO

Area

Counties, with a storm outline in the text

County Sedgwick County, CO

The Goodland radar (KGLD), 180 km from the middle of the area, began a volume at 02:56 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.

Not verified. The Iowa Environmental Mesonet's Cow found no qualifying storm report inside this severe thunderstorm warning while it was in force. That is not proof nothing happened: reports are thin where few people live.

Cow counts a report within 15 km of the polygon while the warning was in force: a tornado for a tornado warning; hail of 1 inch or more, a gust of 58 mph or more or wind damage for a severe thunderstorm warning; a flash flood report for a flash flood warning.

049 
WUUS55 KBOU 050254
SVRDEN
COC115-050345-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE DENVER CO
854 PM MDT SUN AUG 4 2002

THE NATIONAL WEATHER SERVICE IN DENVER HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  EASTERN SEDGWICK COUNTY IN NORTHEAST COLORADO
  THIS INCLUDES THE CITY OF JULESBURG

* UNTIL 945 PM MDT

* AT 854 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM 9 MILES SOUTH OF OVID...OR ABOUT 11 MILES SOUTH
  OF JULESBURG...MOVING NORTHEAST AT 20 MPH.

LOCATIONS IN THE WARNING INCLUDE...BUT ARE NOT LIMITED TO...JULESBURG
AND OVID.

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.

IF YOU ARE CAUGHT OUTSIDE...SEEK SHELTER FROM THE WEATHER IN A STRONG
BUILDING. DAMAGING WIND...LARGE HAIL...VERY HEAVY RAIN...AND DEADLY
LIGHTNING ARE ALL POSSIBLE IN SEVERE THUNDERSTORMS. STAY INSIDE AWAY
FROM WINDOWS UNTIL THE STORM HAS PASSED.

LAT...LON 4100 10250 4078 10250 4078 10208 4099 10207

KLEYLA

NWS Denver/Boulder, CO wrote its last area forecast discussion before this severe thunderstorm warning went out at Aug 4, 3:01 PM MDT, 5 hours 53 minutes earlier.

NORTHEAST AND NORTH CENTRAL COLORADO AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE DENVER COLORADO
301 PM MDT SUN AUG 4 2002

TONIGHT:  CURRENT RADAR PICTURES ARE INDICATING SCATTERED SHOWERS
AND ISOLATED THUNDERSTORMS GOING OVER THE FOOTHILLS...PARK
COUNTY...AND THE PALMER RIDGE.  THIS AFTERNOON HAS A BIT MORE LOW
LEVEL MOISTURE IN PLACE THEN SATURDAY AFTERNOON AND THE ACARS
SOUNDINGS SHOW THE MID/UPPER LEVEL CAP A BIT WEAKER.  THE REAL
SOUNDINGS KEEP SHOWING PRECIPITABLE WATER VALUES OVER AN INCH.
SCATTERED TO ISOLATED POPS WILL SUFFICE THIS EVENING.

MONDAY THROUGH WEDNESDAY:  THE WATER VAPOR SATELLITE PICTURES ARE
SHOWING A BIT OF A MID/UPPER LEVEL DRY INTRUSION COMING OUR WAY.
HOWEVER THE MOISTURE SHOULD NOT BE PINCHED OFF COMPLETELY.  MODELS
SHOW THE UPPER RIDGE CENTER TO REMAIN EAST OF THE FORECAST OFFICE
THROUGH THE PERIOD.  SO WE SHOULD STAY IN THE FAVORABLE FETCH FOR
MID AND UPPER LEVEL MOISTURE.  IN THE LOW LEVELS...THE GRIDS KEEP
SOME FORM OF EASTERLY FLOW UP INTO THE FOOTHILLS THROUGH WEDNESDAY
ALONG WITH A DECENT THETA-E AXIS BELOW 600 MB...ESPECIALLY OVER THE
FOOTHILLS AND ADJACENT PLAINS.  CROSS SECTION LAPSE RATES SHOW A
PRETTY GOOD CAP CONTINUING BETWEEN 500-400 MB.  THE DIV-Q GRIDS SHOW
LITTLE SYNOPTIC SCALE FORCING ON MONDAY...BUT SOME WEAK ASCENT IN
PROGGED FOR TUESDAY AND WEDNESDAY.  PRECIPITATION GRIDS SHOW
MEASURABLE PRECIPITATION OVER THE WESTERN TWO-THIRDS OF THE FORECAST
AREA FROM ABOUT MID AFTERNOON THROUGH JUST AFTER MIDNIGHT ALL THREE
DAYS...MONDAY THROUGH WEDNESDAY.  SINCE IT ACTUALLY HAS STARTED TO
RAIN NOW WITH THE GREAT PONTOON UPON UP...PERSISTENCE SHOULD BE
THE BEST ROUTE TO GO WITH AS FAR AS POPS GO.  SCATTEREDS LOOK GOOD
FOR THE MOUNTAIN...FOOTHILLS...PALMER RIDGE...AND URBAN CORRIDOR
THROUGH THE PERIOD.  FOR TEMPERATURES...GRIDS SHOW MINOR FLUCTUATION
THROUGH THE PERIOD...BUT PERSISTENCE WILL BE GOOD... WHICH BY THE
WAY KEEPS THE READINGS NEAR NORMALS.  FOR THE EXTENDED PERIOD THE
UPPER RIDGE CENTER REMAINS EAST OF THE FORECAST AREA THROUGH ABOUT
FRIDAY.  AN UPPER TOUGH NORTH OF COLORADO PUSHES EAST LATE FRIDAY
INTO SATURDAY...WITH THE UPPER RIDGE PUSHING BACK TO OUR SOUTHWEST
BY SUNDAY. WILL START TO DRY OUT THE FORECAST FOR NEXT WEEKEND.  RJK

.DEN...NONE.

Severe Thunderstorm Warnings in Colorado, 2002Every severe thunderstorm warning in 2002

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.