Flash Flood Warning 6, NWS Pueblo, CO

Issued

Aug 4, 1999, 8:08 PM MDT (02:08 UTC)

Expired

Aug 4, 1999, 11:00 PM MDT

In force

3 hr

Issued by

NWS Pueblo, CO

Area

Whole counties

County Crowley County, CO

000 
TTAA00 KPUB 050209 RRA
FFWPUB
COC025-050500-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE PUEBLO CO
808 PM MDT WED AUG 4 1999

THE NATIONAL WEATHER SERVICE IN PUEBLO HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  NORTHERN CROWLEY COUNTY IN SOUTHEASTERN COLORADO

* UNTIL 1100 PM MDT

  FLASH FLOODING IS EXPECTED OVER PORTIONS OF NORTHERN CROWLEY
  COUNTY THROUGH 1100 PM MDT...IF FLOODING THREATENS...PLEASE
  MOVE TO HIGHER GROUND IMMEDIATELY.  BE ESPECIALLY CAUTIOUS AT
  NIGHT WHEN IT IS HARD TO RECOGNIZE THE DANGERS OF FLOODS AND
  FLASH FLOODS. THE ROAD OR A BRIDGE MAY BE WASHED OUT AND THE FAST
  FLOWING WATER MAY BE SEVERAL FEET DEEP.  DRIVING INTO THIS
  SITUATION COULD BE FATAL.  ALSO NORMALLY DRY ARROYOS IN NORTHERN
  CROWLEY COUNTY MAY BE FULL AND VERY DANGEROUS.

* AT 800 PM MDT...DOPPLER RADAR ESTIMATED RAINFALL IN EXCESS OF 2
  INCHES SINCE 530 PM MDT OVER PORTIONS OF NORTHERN CROWLEY COUNTY.
  IN ADDITION SPOTTERS ALSO INDICATED THAT RAINFALL OF UP TO TWO
  INCHES HAS OCCURRED APPROXIMATELY 15 MILES NORTH OF ORDWAY IN
  NORTH-CENTRAL CROWLEY COUNTY.  A VERY SLOW MOVING BOUNDARY WAS
  IN NORTHERN CROWLEY COUNTY AND THE POTENTIAL EXISTS THAT
  ADDITIONAL RAIN...HEAVY AT TIMES MAY OCCUR DURING THE NEXT FEW
  HOURS.  AT 800 PM MDT PUEBLO DOPPLER RADAR INDICATED THAT THE
  STRONGEST THUNDERSTORMS WERE 5 MILES AND 15 MILES NORTHWEST OF
  ORDWAY.

  THESE THUNDERSTORMS WERE MOVING TO THE WEST AT 10 MPH..

* THUNDERSTORMS WILL CONTINUE TO BE CAPABLE OF PRODUCING FLOODING
  RAIN TO MAINLY OPEN COUNTRY OF NORTHERN CROWLEY COUNTY THROUGH
  1030 PM MDT.

IF YOU ARE IN OR CLOSE TO THE WARNED AREA GO TO HIGHER GROUND
IMMEDIATELY.  DO NOT DRIVE OR WALK \THROUGH WATER.  YOU NEVER KNOW
HOW DEEP THE WATER REALLY IS.  KEEP CHILDREN AWAY FROM DRAINAGE
DITCHES AND SWIFTLY FLOWING WATER.

"77"

NWS Pueblo, CO wrote its last area forecast discussion before this flash flood warning went out at Aug 4, 2:20 PM MDT, 5 hours 48 minutes earlier.

SOUTH CENTRAL AND SOUTHEAST COLORADO AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE PUEBLO
220 PM MDT WED AUG 4 1999

...FOCUS ON FLASH FLOOD POTENTIAL TONIGHT...

THE MOISTURE CONTENT OF THE ATMOSPHERE OVER SOUTHERN COLORADO
CONTINUES TO REMAIN VERY HIGH.  PRECIPITABLE WATER VALUES ARE AROUND
150% OR BETTER.  LOW LEVEL MOISTURE IS VERY AMPLE WITH SURFACE
DEWPOINTS RANGING FROM THE MID 50S IN THE SAN LUIS VALLEY TO THE MID
60S ACROSS THE SOUTHEAST PLAINS.  IN ADDITION...ANOTHER UPPER LEVEL
DISTURBANCE WILL TRACK ACROSS THE AREA THIS EVENING AS SURFACE HIGH
PRESSURE SLIDES SOUTH INTO KANSAS.  THIS SHOULD ENHANCE SOUTHEAST
UPSLOPE FLOW ACROSS THE SOUTHEAST MOUNTAINS AND PLAINS THIS EVENING.
PLENTY OF UNORGANIZED CONVECTION ACROSS SOUTHERN COLORADO ATTM.
BELIEVE THAT INCREASING SOUTHEAST UPSLOPE WINDS ASSOCIATED WITH
SURFACE HIGH SLIDING BY TO OUR EAST WILL RAISE THE POTENTIAL FOR
ORGANIZED CONVECTION THIS EVENING...ESPECIALLY ALONG THE EAST SLOPES
OF MOUNTAINS...WHERE TERRAIN ANCHORING COULD OCCUR.  SINCE FLASH
FLOOD GUIDANCE VALUES ARE CURRENTLY SO LOW ACROSS THE AREA DUE TO
HEAVY RAINS OF LATE...THE WFO PUEBLO TEAM FELT COMPELLED TO ISSUE A
FLASH FLOOD WATCH FOR THE SOUTHEAST MOUNTAINS AND PLAINS UNTIL 2 AM
MDT.

OVER THE NEXT TWO DAYS...REALLY NOT TOO MUCH CHANGE IN THE PATTERN.
MODELS ARE...HOWEVER...IMPLYING SOME DRYING...NOT SO MUCH THURSDAY
BUT MORE SO ON FRIDAY.  WILL TRY TO REFLECT THIS TREND IN THE
FORECAST.

IN THE EXTENDED PERIOD...MODELS REALLY TRY TO SHOW SOME DRYING FOR
SATURDAY WITH SURFACE PATTERN INDICATING DOWNSLOPE FLOW.  LOOKS LIKE
TROPICAL MOISTURE PLUME TO WORK EAST THROUGH UPPER RIDGE AND RETURN
TO CWA AGAIN FOR SUNDAY AND MONDAY.

.PUB...FLASH FLOOD WATCH ZONES 65>68 AND 70>81 TIL 2 AM MDT.

LW

Flash Flood Warnings in Colorado, 1999Every flash flood warning in 1999

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive.