Flash Flood Warning 37, NWS Flagstaff, AZ

Issued

Sep 11, 1997, 4:08 PM MST (23:08 UTC)

Expired

Sep 11, 1997, 5:05 PM MST

In force

57 min

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 23:08 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 112309
FFWFLG
AZC005-120105-

BULLTIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM AND FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE FLAGSTAFF AZ
408 PM MST THU SEP 11 1997

THE NATIONAL WEATHER SERVICE IN FLAGSTAFF AZ HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 505 PM MST
AND A FLASH FLOOD WARNING EFFECTIVE UNTIL 605 PM MST
FOR PEOPLE IN THE FOLLOWING LOCATION...

IN NORTH CENTRAL ARIZONA

   ...NORTH CENTRAL COCONINO COUNTY
 
 
AT 405 PM MST...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS
INDICATING SEVERE THUNDERSTORMS IN NORTH CENTRAL COCONINO
COUNTY. THE STRONGEST STORM IS 20 MILES WEST-NORTHWEST OF
TUBA CITY MOVING EASTWARD AT 25 MPH.

THIS STORM WILL CROSS HIGHWAY 89 AND APPROACH THE MOENAVE AND
TUBA CITY AREAS BY 430 PM MST

THIS STORM WILL PRODUCE HEAVY RAIN OVER THE HAMBLIM AND OTHER
NEARBY WASHES. AS HEAVY RAIN HAS ALREADY FALLEN OVER THIS AREA
EARLIER....FLASH FLOODING IS POSSIBLE WITH THIS STORM.

WHEN THUNDERSTORMS ARE OCCURRING...FIND SHELTER INSIDE A STRONG
BUILDING AND DO NOT STAND BY WINDOWS. DO NOT USE TELEPHONES OR
ELECTRICAL APPLIANCES UNLESS IN AN EMERGENCY UNTIL THE STORM HAS
PASSED. MOTORISTS SHOULD NOT DRIVE INTO LOW WATER CROSSINGS.

DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE WATER 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 Sep 11, 2:23 PM MST, 1 hour 45 minutes earlier.

NORTHERN ARIZONA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE FLAGSTAFF AZ
200 PM MST THU SEP 11 1997

COORDINATED WITH PHX ON FFA FOR SRN PART OF CWA UNTIL 5PM WHERE
FLOODING PRBLMS OCCRD EARLIER AND WERE STILL FORMING.  ALSO TALKED TO
SLC ABOUT CONCERNS FOR SVR WATCH NRN AZ...DECIDED NOT CRITICAL FOR
OUR CWA.  JET ASSOC WITH NICE UPR DIV/LWR CONV CUPLET WILL BE IN ERN
AZ BY THIS EVENING AND WILL HAVE TO BUMP UP SOME POPS THERE TONITE AS
CONVECTION LIKELY TO LINGER THRU SOME OF EVENING.

LIMITED LOOK AT MODELS TODAY DUE TO BUSY MORNING AND DATA PROCESSING
PRBLMS..MOST THOROUGH LOOK AT ETA.  MDLS ALL FCST SIGNIFICANT DRYING
BEHIND S/WV TROF IN SWRLY FLOW AT MID AND UPPER LEVELS...BUT SFC-
BASED INSTBLTY PARAMETERS DONT DROP OFF TOO MUCH.  STRONGEST ACTIVITY
WILL SHIFT TO SOUTHEAST AZ...INCLUDING EASTERN RIM AND WHT MTNS
TONITE AND TMRW...BUT WITH LOW-LVL MSTR LINGERING CAN'T RULE OUT
WESTERN PART OF CWA FOR SCT CONVECTION FRI.  HOWEVER NOT MUCH CHC OF
A TRIGGER LIKE WE HAD TDY AHEAD OF THE S/WV SO LKLY NO SVR OF FF
PRBLMS.  ETA INDICATING MOST THOROUGH DRYING OVR NW AND N-CNTRL AZ SO
WILL DROP POPS TO ISOLD THERE BOTH FRI AND SAT.  SW FLOW SHOULD KEEP
BEST MSTR IN SRN PART OF CWA.

MRF SUGGESTING CHC THAT H5 RDG WILL BUILD AGAIN BY LATE SAT AND INTO
EXTENDED PD...SO MAY NOT GET OUT OF SUMMER CONVECTIVE SEASON FOR A
WHILE YET.

FLG 2323  INW 3323
KEIGHTON
FLG...FLASH FLOOD WATCH SE YAV CNTY AND NW GILA CNTY TIL 5 PM MST

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.