Flash Flood Warning 9, NWS Flagstaff, AZ

Issued

Aug 4, 1997, 12:53 PM MST (19:53 UTC)

Expired

Aug 4, 1997, 4:00 PM MST

In force

3 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 19:56 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.

000 
TTAA00 KFLG 041958
FFWFLG
AZC005-042255-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE FLAGSTAFF AZ
1253 PM MST MON AUG 4 1997

THE NATIONAL WEATHER SERVICE IN FLAGSTAFF AZ HAS ISSUED A
FLASH FLOOD WARNING EFFECTIVE UNTIL 400 PM MST
FOR PEOPLE IN THE FOLLOWING LOCATION...

IN NORTH CENTRAL ARIZONA

   ...CENTRAL COCONINO COUNTY

AT 1250 PM MST...FLAGSTAFF DOPPLER RADAR SHOWED STRONG
THUNDERSTORMS WERE PRODUCING VERY HEAVY RAIN IN CENTRAL COCONINO
COUNTY 5 MILES SOUTHEAST OF VALLE AT THE JUNCTION OF STATE HIGHWAYS
180 AND 64. RADAR ESTIMATED BETWEEN 2 AND 3 INCHES HAD FALLEN IN AN
HOUR OVER THE SPRING VALLEY AND MILLER WASHES.
 
DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE WAT(ER COVERS THE
ROADWAY. THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO
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 4, 9:00 AM MST, 3 hours 53 minutes earlier.

NORTHERN ARIZONA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE FLAGSTAFF AZ
900 AM MST MON AUG 04 1997

12Z FGZ SOUNDINGS HAVE MOISTENED UP CONSIDERABLY OVER THE PAST 24 HRS
WITH PRECIPITABLE WATER VALUES AROUND 1.5 INCHES...NO REAL SURPRISE
THERE. DEWPOINT ANALYSIS ALSO SHOWING NICE VALUES ACROSS PORTIONS OF
THE CWA WITH AREAS 50-60 DEGREES PLUS. DO NOT BELIEVE MUCH MIXING
WILL OCCUR AS LOW LEVEL LAYER OF MOISTURE SHOWING CONSIDERABLE DEPTH.
THE MID TO UPPER LEVELS HAVE WARMED A DEGREE OR TWO OVER THE PAST 24
HRS.

APPEARS FLG CWA ON TRACK FOR ANOTHER ACTIVE CONVECTIVE DAY...WITH
LESS CLOUD COVER SHOULD ALLOW FOR SOME DECENT DAYTIME HEATING TO
OCCUR. ALREADY SOME CU BREAKING OUT NEAR OFFICE...AND SOME ACTIVITY
SHOWING UP IN SOUTHERN NAVAJO COUNTY. ONE THING TO CONSIDER IS THE
EARLIER MENTIONED HEATING UP OF MID TO UPPER LEVELS AND LACK OF
SIGNIFICANT MID TO UPPER LEVEL DYNAMICS WITH EXITING VORT MAX OVER
NORTHERN PORTIONS OF THE STATE. BUT THINKING HERE IS THAT HEATING
SHOULD NOT HAVE MUCH OF A PROBLEM OVERCOMING THESE MINUSES...SO
SCATTERED POPS LOOKING GOOD FOR THE CWA TODAY. FOR TEMPS...FIRST
PERIOD TEMPS SHOULD BE UP QUITE A BIT WITH THE LACK OF CLOUDS THAT
WERE PRESENT YESTERDAY.

12Z ETA APPEARS TO HAVE A BIT BETTER HANDLE ON INITIALIZATION OF VORT
MAX OVER NORTHERN ARIZONA THIS MORNING. 12Z RUC SHOWING A FAIR
INITIALIZATION AS WELL.  VORT MAX PROGGED TO CONTINUE ON ITS WAY
NORTH TODAY...BUT TAILING VORT LOBE WHICH EXTENDS INTO SOUTHERN
PORTIONS OF THE STATE MAY HELP IN GENERATING THUNDERSTORMS. OVER THE
NEXT FEW DAYS SLIGHT DRYING TO OCCUR. FORECASTS LOOK TO BE IN GOOD
SHAPE..PLANNING NO UPDATES.

FLG 423  INW 522
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.