Flash Flood Warning 5, NWS Flagstaff, AZ

Issued

Aug 3, 1997, 3:53 PM MST (22:53 UTC)

Expired

Aug 3, 1997, 5:55 PM MST

In force

2 hr

Issued by

NWS Flagstaff, AZ

Area

Whole counties

County Coconino County, AZ

The Flagstaff radar (KFSX), 150 km from the middle of the area, began a volume at 22:54 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 KFLG 032254
FFWFLG
AZC005-040055-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE FLAGSTAFF AZ
353 PM MST SUN AUG 3 1997

THE NATIONAL WEATHER SERVICE IN FLAGSTAFF AZ HAS ISSUED A
FLASH FLOOD WARNING EFFECTIVE UNTIL 555 PM MST
FOR PEOPLE IN THE FOLLOWING LOCATION...

IN NORTH CENTRAL ARIZONA

   ...EASTERN COCONINO COUNTY
 
THE FLASH FLOOD WARNING THAT WAS IN EFFECT FOR EASTERN COCONINO
COUNTY HAS BEEN EXTENDED UNTIL 6 PM MST.  AT 345 PM MST...ARIZONA
DEPARTMENT OF SAFETY REPORTED THAT STATE HIGHWAY 99 SOUTH OF LEUPP
WAS STILL CLOSED DUE TO FLOODING.  THE THUNDERSTORMS THAT PRODUCED
THE HEAVY RAIN OVER THE LEUPP AREA HAVE MOVED TO THE NORTH AND
WEAKENED...HOWEVER HEAVY RUNOFF SOUTH OF LUEPP ACROSS HIGHWAY 99
IS STILL LIKELY UNTIL 6 PM MST.

DO NOT DRIVE INTO AREAS WHERE WATER COVERS THE ROAD!
 
DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE WATER COVERS THE
ROADWAY. THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR pTO
CROSS SAFELY OR THE ROADBED MAY NOT BE INTACT.  VEHICLES CAUGHT IN
RISING WATER SHOULD BE ABANDONED QUICKLY.  MOVE TO HIGHER GROUND.

&

NWS Flagstaff, AZ wrote its last area forecast discussion before this flash flood warning went out at Aug 3, 2:09 PM MST, 1 hour 44 minutes earlier.

NORTHERN ARIZONA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE FLAGSTAFF AZ
205 PM MST SUN AUG 03 1997

BUSY KEEPING UP WITH THE SHORT FUSED PRODUCTS THIS AFTERNOON...AS
QUITE A BIT OF MOISTURE HAS WORKED INTO THE AREA...FOCUSING MAINLY ON
THE HEAVY RAIN POTENTIAL FOR THE CWA FIRST PERIOD. FROM THE MODEL
DATA IT APPEARS THAT THE 12Z ETA DID NOT DO A GOOD JOB IN PLACING
VORT MAX CURRENTLY OVER BAJA IN ITS INITIALIZATION. THE 12Z NGM ONLY
DID SLIGHTLY BETTER. THE 12Z AVN WAS NOT INITIALIZED WELL OVER THE
SOUTHWEST EITHER. THEREFORE...DO NOT REALLY TRUST MODELS FOR THE
LONGER TERM. FROM SAT WATER VAPOR IMAGERY IT APPEARS THE VORT MAX
WILL MAKE A BEE-LINE UP THE COLORADO RIVER VALLEY...BUT A RELATIVELY
SLOW BEE-LINE.

FORECAST PROBLEM OF THE DAY IS WHETHER THE DYNAMICS WILL BE STRONG
ENOUGH TO KICK OFF SOME NOCTURNAL ACTIVITY OVER SOUTHWEST PORTION OF
THE CWA. WITH PRECIP ALREADY RECEIVED THERE...FLASH FLOODING WILL
BECOME A REAL CONCERN.

OVER THE NORTHERN SECTIONS OF THE CWA...HAVE KEPT FIRST PERIOD POPS
RELATIVELY HIGH AS TODAYS CONVECTIVE ACTIVITY CONTINUES TO WORK TO
THE NORTH. AFTER THE FIRST PERIOD HAVE MAINLY BROAD-BRUSHED POPS OVER
THE CWA...WITH FAVORED AREAS OVER THE CENTRAL MOUNTAINS...AS MOISTURE
SHOULD CONTINUE TO FILTER INTO THESE AREAS.  FOR TEMPS...NGM MOS
LOOKS LIKE IT HAS A DECENT HANDLE ON TEMPS...EVEN CAPTURING THE
HIGHER MINS EXPECTED TO NIGHT WITH THE CLOUD COVER IN PLACE. ONLY
MADE A FEW MINOR ADJXUSTMENTS TO THE MOS NUMBERS.
FLG 573  INW 553
FLG...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.