Flash Flood Warning 31, NWS Las Vegas, NV

Issued

Jul 13, 1999, 12:01 PM PDT (19:01 UTC)

Expired

Jul 13, 1999, 3:00 PM PDT

In force

3 hr

Issued by

NWS Las Vegas, NV

Area

Whole counties

County Clark County, NV

000 
TTAA00 KVEF 131906
FFWLAS
NVC003-132200-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE LAS VEGAS NV
1201 PM PDT TUE JUL 13 1999

THE NATIONAL WEATHER SERVICE IN LAS VEGAS HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  WESTERN CLARK COUNTY IN SOUTHERN NEVADA
  THIS INCLUDES THE FOLLOWING LOCATIONS...DOWNTOWN LAS VEGAS...EAST
  LAS VEGAS...GREEN VALLEY...INDIAN SPRINGS...MT. CHARLESTON...NELLIS
  AFB...NORTH LAS VEGAS...RED ROCK CANYON...SKY HARBOR AIRPORT...
  SLOAN...SPRING MOUNTAIN RANCH...SPRING VALLEY...SUMMERLIN...THE
  LAKES...THE STRIP

* UNTIL 300 PM PDT

* AT 1201 PM PDT...AUTOMATED RAIN GAGES INDICATED VERY HEAVY RAIN 
3   MILES SOUTHEAST OF RED ROCK CANYON...STATIONARY. RAINFALL TOTALS
   OF 1 TO 2 INCHES HAVE BEEN REPORTED IN SINCE 1100 AM. FLASH 
FLOODING IS ALREADY OCCURING AROUND RED ROCK CANYON AND CALICO BASIN.

* THUNDERSTORM WITH EXCESSIVE RAINFALL WILL BE...
  3 MILES NORTH OF SPRING MOUNTAIN RANCH AT 1235 PM PDT
  OVER RED ROCK CANYON AT 200 PM PDT

EXCESSIVE RUNOFF FROM THIS STORM WILL CAUSE FLASH FLOODING OF WASHES
AND SMALL STREAMS. ADDITIONALLY...HIGHWAYS...UNDERPASSES AND OTHER
LOW LYING AREAS WILL BE SUBJECT TO FLASH FLOODING.

A FLASH FLOOD WARNING MEANS THAT FLOODING IS OCCURRING OR IS
IMMINENT. MOST FLASH FLOOD DEATHS OCCUR IN AUTOMOBILES. NEVER ATTEMPT
TO CROSS SWIFTLY FLOWING WATER. VEHICLES CAUGHT IN RISING WATERS
SHOULD BE ABANDONED QUICKLY.

LAT...LON 3585 11507 3658 11r498 3666 11564 3599 11585

SKRBAC

NWS Las Vegas, NV wrote its last area forecast discussion before this flash flood warning went out at Jul 13, 9:26 AM PDT, 2 hours 35 minutes earlier.

MOJAVE DESERT/SOUTHERN GREAT BASIN AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE LAS VEGAS NV
920 AM PDT MON JUL 12 1999

SYNOPSIS...HIGH PRESSURE NEAR THE FOUR CORNERS WILL CONTINUE TO
PULL MOISTURE NORTH INTO THE REGION. IN ADDITION...THE AIR MASS IS
VERY UNSTABLE TODAY...RESULTING IN NUMEROUS SHOWERS AND SCATTERED
THUNDERSTORMS...SOME WITH HEAVY RAIN. THE HIGH PRESSURE SYSTEM WILL
SHIFT EAST ON WEDNESDAY... ALLOWING A LOW PRESSURE SYSTEM TO DEVELOP
OVER THE PACIFIC NORTHWEST. THIS WILL RESULT IN INCREASED SOUTHWEST
FLOW ALOFT WHICH WILL BEGIN PUSHING THE MOIST AIR MASS EASTWARD.
DAYTIME TEMPERATURES WILL REMAIN BELOW NORMAL.

DISCUSSION...NEW MESO-ETA SHOWS 300 MB DIVERGENCE COUPLED WITH 700 MB
CONVERGENCE TODAY CENTERED GENERALLY OVER THE COLORADO RIVER...
BASICALLY WHERE WE HAVE THE FLASH FLOOD WATCH. WITH CONTINUED
SOUTHERLY FLOW AND ABUNDANT MOISTURE TO THE SOUTH ...TRAINING OF
SHOWERS AND THUNDERSTORMS A CONCERN. WE HAVE SEEN SOME OF THAT THIS
MORNING BUT SO FAR RAINFALL RATES HAVE REMAINED LOW ENOUGH TO NOT
CAUSE ANY PROBLEMS. FLASH FLOOD WATCH LOOKS GOOD AND WILL LIKELY NOT
MAKE ANY ADJUSTMENTS AS MODELS AND OBSERVED WEATHER SUPPORT THE
LOCATION OF THE WATCH. OTHERWISE FORECAST LOOKS TO BE IN PRETTY GOOD
SHAPE AND NO UPDATES PLANNED. THERE ARE SOME BREAKS IN CLOUDS BUT
WILL HAVE TO MONITOR TEMPERATURES FOR POSSIBLE LOWERING.

.LAS...A FLASH FLOOD WATCH HAS BEEN POSTED FOR PORTIONS OF SRN NV...
       NW AZ...AND SERN CA FROM 17Z UNTIL 04Z. REFER TO THE LATEST
       STATEMENT FOR DETAILS.

Flash Flood Warnings in Nevada, 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.