Flash Flood Warning 16, NWS Las Vegas, NV

Issued

Aug 7, 1997, 6:24 PM MST (01:24 UTC)

Expired

Aug 7, 1997, 8:30 PM MST

In force

2 hr

Issued by

NWS Las Vegas, NV

Area

Whole counties

County Mohave County, AZ

The Las Vegas radar (KESX), 102 km from the middle of the area, began a volume at 01:26 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.

000 
TTAA00 KLAS 080125
FFWLAS
AZC015-080330-
 
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE LAS VEGAS NV
624 PM PDT (624 PM MST) THU AUG 7 1997
 
THE NATIONAL WEATHER SERVICE IN LAS VEGAS HAS ISSUED A
FLASH FLOOD WARNING EFFECTIVE UNTIL  830 PM PDT (830 PM MST)
FOR PEOPLE IN THE FOLLOWING LOCATIONS......
 
IN NORTHWEST ARIZONA
 
   ...SOUTHWESTERN MOHAVE COUNTY
 
AT 625 PM MST SEVERE THUNDERSTORMS HAD MOVED SOUTHWEST AND ACROSS THE
COLORADO RIVER INTO SAN BERNARDINO COUNTY CALIFORNIA. BUT AREAS OF
HEAVY RAIN REMAINED THROUGHOUT MUCH OF SOUTHWESTERN MOHAVE COUNTY
ARIZONA.  WASHES AND ARROYOS THROUGHOUT SOUTHWESTERN MOHAVE COUNTY...
AND ESPECIALLY ALONG AND JUST WEST OF THE COLORADO RIVER...COULD
CONTINUE FLOODED AND CARRY ADDITIONAL WATERS FOR 1 TO 2 MORE HOURS.
 
DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE
ROADWAY.  THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO
CROSS SAFELY.  VEHICLES CAUGHT IN RISING WATER SHOULD BE
ABANDONED QUICKLY.  MOVE TO HIGHER GROUND.
 
MCQUEEN

NWS Las Vegas, NV wrote its last area forecast discussion before this flash flood warning went out at Aug 7, 2:49 PM MST, 3 hours 35 minutes earlier.

MOJAVE DESERT/SOUTHERN GREAT BASIN AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE LAS VEGAS NV
250 PM PDT THU AUG 7 1997

ISOLD TSTMS FORCED SVRL UPDTS THIS AFT. TSTMS MOST NUMEROUS OVR
ECNTRL NYE CO...CLOSEST TO CNTR OF MID LVL ANTICYCLONIC
CIRCULATION.  INJECTION OF MID LVL MSTR AND INSTABILITY NOTED THERE
EARLIER AND PSBL THAT UPR LVL SPEED AND DIRECTIONAL DIVERGENCE
CONTRIBUTING TO DEVELOPMENT.  UPR LOW CONTS TO DVLP OFF CA COAST W
OF PRINCIPLE RDG ACRS CNTRL NV/CA.  MODELS AGREE THAT HGTS WILL LWR
SOME AS UPR HIGH SHIFTS SEWD INTO AZ NEXT BY SAT.  "BAGGY" TROF
THEN REMAINS OFF W COAST INTO WEEKEND AND QUITE POSSIBLY THE
CYCLONIC CIRCULATION WILL EJECT NUMEROUS MID/UPR LVL S/WVS THAT
WILL AID IN CONVECTION AS THE TRAVERSE NV IN SWLY FLOW.  NONE OF
THIS EVIDENT ON MODELS DUE TO SMALL SCALE NATURE OF THESE SYSTEMS.

BASED ON AMT OF TSTMS THAT DEVELOPED TDA...IT IS APPARENT THAT
PLENTY OF MSTR CONTAMINATING UPR HIGH.  THIS MAKES IT EXTREMELY
DIFFICULT TO REALLY DEFINE WHERE TSTMS MIGHT BE SUPPRESSED.  WITH
THAT IN MIND HAVE BROAD BRUSHED MOST ZONES WITH ISOLD AFT/EVE TSTMS
THRU SAT.  TROUBLE SPOTS LIKELY TO CONT TO BE SCNTRL NV ZONES AS
MSTR CONTS TO CIRCULATE AROUND 5H RDG.  THE OTHER AREA OF CONCERN
WILL BE TO THE S WERE RICH LOW LVL MSTR CONTS TO POOL ALONG CO RVR
IN WEAK GULF SURGE.  THAT MSTR NOT LIKELY TO BE SCOURED OUT ANYTIME
SOON AND MAY YET WORK NWD INTO LAS VALLEY THIS WEEKEND.  PER COOR
W/RNO EXTENDED WILL CONTAIN MENTION OF TSTMS OVR THE MTNS DUE TO
UNCERTAINTY OF AVAILABLE MSTR AND MINOR S/WVS.  A LTL MORE
CONFIDENT IN DOWNWARD TREND IN TEMPS AS HGTS CONT TO LWR.
LAS 0001.

NEMETH

SRN NV...NONE
ERN CA...NONE
NW AZ ...NONE

Flash Flood Warnings in Arizona, 1997Every flash flood warning in 1997

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; radar from the NEXRAD Level II archive.