Severe Thunderstorm Warning 75, NWS Flagstaff, AZ

Issued

Sep 4, 1997, 2:27 PM MST (21:27 UTC)

Expired

Sep 4, 1997, 3:30 PM MST

In force

63 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 21:28 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.

NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in.

362 
WUUS1 KFLG 042128 RRA
SVRFLG
AZC005-042230-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE FLAGSTAFF AZ
227 PM MST THU SEP 4 1997

THE NATIONAL WEATHER SERVICE IN FLAGSTAFF AZ HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 330 PM MST
FOR PEOPLE IN THE FOLLOWING LOCATION...

IN NORTH CENTRAL ARIZONA

   ...CENTRAL COCONINO COUNTY
 
AT 224 PM MST...A SEVERE THUNDERSTORM WAS INDICATED BY FLAGSTAFF
DOPPLER RADAR 21 MILES SOUTH OF PAGE OR 11 MILES SOUTH SOUTHWEST OF
GRAY MOUNTAIN MOVING EAST NORTHEAST AT 30 MPH.
 
IF YOU ARE OUTDOORS AND A STORM APPROACHES...MOVE TO A PLACE OF
SHELTER IMMEDIATELY. MOTORISTS SHOULD REMAIN ALERT FOR STREET
FLOODING AND REDUCED VISIBILITIES IN HEAVY RAIN.

NWS Flagstaff, AZ wrote its last area forecast discussion before this severe thunderstorm warning went out at Sep 4, 2:13 PM MST, 14 minutes earlier.

NORTHERN ARIZONA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE FLAGSTAFF AZ
200 PM MST THU SEP 4 1997

ETA SOLUTION SUGGESTS THE RIM COUNTRY TO BE THE FOCUS FOR DECENT
CONVECTION FRIDAY AFTN...WITH SCATTERED TS ACROSS THE REST OF THE
CWFA. THE MAIN AREA OF CONCERN DURING THIS TIME IS THE KAIBAB AND
COCONINO PLATEAUS WHERE H6 ETA UVV/RH FIELD LOOKS POTENTIALLY
INTERESTING. IN ANY CASE...THE EXPECTED WX COVERED WELL WITH
SCATTERED WORDING EACH AFTERNOON THROUGH THE FCST PD. PERTURBATIONS
IN THE FLOW THAT MIGHT DRIVE NIGHT TIME CONVECTION...AS WE'VE SEEN
MANY NIGHTS LATELY...ARE HARD TO DETECT SO A MORE DIURNAL PATTERN OF
CLOUD DEVELOPMENT LOOKS TO BE IN THE WORKS. THE AVN VORTICITY FIELD
LOOKS PRETTY BORING AND SUPPORTS THE DIURNAL PATTERN I'M THINKING
ABOUT.

PRECIPITABLE WATER DOESN'T CHANGE MUCH...LI'S STAY LOW OVER WRN AZ
AND CHANGE LITTLE OVER THE FLG CWFA...H7 THTE DOESN'T CHANGE MUCH AND
THE PROGGED SOUNDINGS STAY FAIRLY MOIST OVER THE NORTHLAND. ALL OF
THIS POINTS TO A STATUS QUO FORECAST CALLING FOR FEW MORNING CLOUDS
AND SCATTERED AFTN SH AND TS ALONG HIGHER TERRAIN...WITH ISOLATED SH
AND TS MOST OTHER AREAS. AGAIN...THE AREA TO WATCH IN THE FLG CWFA
WILL BE ZONES 4-7 AND MAYBE 15.

TEMPS LOOK LIKE THERE WILL BE LITTLE CHANGE...PERHAPS SLIGHT WARMING
THROUGH THE WEEKEND DUE TO MOSTLY SUNNY MORNING SKIES. WINDS NOT
EXPECTED TO EXCEED 15 MPH...SO NO WORRIES THERE.

IN THE EXTENDED...CARRYING THE TYPICAL SORT OF S(CATTERED AFTERNOON
WORDING SHOULD TAKE US THROUGH THE WEEKEND. THE MRF HINTING AT
BREAKING DOWN THE RIDGE OUT BY DAY 7+.

FLG 4434  INW 3424
PEREZ
FLG...NONE.

Severe Thunderstorm Warnings in Arizona, 1997Every severe thunderstorm 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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.