Flash Flood Warning 66, NWS Phoenix, AZ

AZZ001-004-007-008-009-010-180400-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE PHOENIX ARIZONA
602 PM MST MON SEP 17 1990

...A FEW STRONG THUNDERSTORMS STILL ACTIVE OVER ARIZONA...

SHORTLY BEFORE 600 PM MST THERE WERE STILL SEVERAL GROUPS OF ACTIVE
THUNDERSTORMS IN ARIZONA...SOME OF WHICH WERE CAUSING HEAVY RAIN AND
SMALL HAIL.

THE MOST ACTIVE GROUP WAS OVER WESTERN YAVAPAI...SOUTHEAST MOHAVE AND
EXTREME NORTHEAST LA PAZ COUNTIES...ROUGHLY FROM WICKIUP AND HIGHWAY
93 ON THE SOUTHWEST...TO THE PEACH SPRINGS...SELIGMAN AND ASH FORK
AREA TO THE NORTH AND EAST. THIS IS VERY THINLY POPULATED COUNTRY AND
NO WEATHER OBSERVATIONS OR SPOTTER REPORTS HAVE BEEN AVAILABLE. BUT
RADAR AND LIGHTNING DETECTORS SUGGEST SOME HEAVY RAINS ARE OCCURRING.
MOTORISTS DRIVING OFF THE MAIN HIGHWAYS SHOULD WATCH OUT FOR WATER IN
DIPS AND STREAM CROSSINGS.

ANOTHER GROUP OF THUNDERSTORMS EXTENDS FROM SOUTHERN GILA COUNTY
ACROSS PINAL COUNTY TO EXTREME SOUTHERN MARICOPA COUNTY SOUTHEAST OF
GILA BEND. THESE THUNDERSTORMS HAVE BEEN SHOWING UP AS QUITE INTENSE
ON PHOENIX RADAR...BUT SURFACE REPORTS FROM WEATHER SPOTTERS INDICATE
RELATIVELY LITTLE WIND AND ONLY BRIEF PERIODS OF HEAVY RAIN. THE
INDIVIDUAL STORMS ARE MOVING RAPIDLY...WHICH CUTS DOWN THE RISK OF
CONCENTRATING THEIR RAIN IN ANY ONE PLACE AND CAUSING ANY MAJOR
FLOODING.

SATELLITE IMAGES SHOWED ANOTHER GROUP OF THUNDERSTORMS OVER THE FOUR
CORNERS AREA...FROM BLACK MESA NORTH AND EASTWARD. THESE ARE BEYOND
THE RANGE OF ANY RADAR...BUT THEY DO NOT APPEAR ESPECIALLY STRONG ON
THE SATEELITE IMAGES.

THUNDERSTORM ACTIVITY IS EXPECTED TO DIMINISH BY SUNSET THIS EVENING
BUT A FEW COULD REMAIN ACTIVE ALL NIGHT.

TENHARKEL 180100Z

AZC013-180345-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE PHOENIX ARIZONA
738 PM MST MON SEP 17 1990

...THUNDERSTORMS WITH SMALL HAIL EAST SIDE OF PHOENIX...

A THUNDERSTORM WITH HEAVY RAIN AND PEA SIZE HAIL MOVED OVER THE
SOUTHEAST SIDE OF THE PHOENIX METRO AREA AROUND 730 PM. THE STORM
APPEARED TO BE WEAKENING ON RADAR...BUT IT WAS MOVING RAPIDLY ENOUGH
SO THAT IT SHOULD REACH MESA AND APACHE JUNCTION BEFORE DISSIPATING.

THE RAPID MOVEMENT OF THE STORM MAKES SUSTAINED HEAVY RAIN UNLIKELY.
SOME MINOR STREET FLOODING MAY OCCUR.

WINDS IN THE STORM HAVE BEEN RELATIVELY LIGHT...MOSTLY UNDER 25 MPH.
HOWEVER A GUST UP TO 40 MPH WAS REPORTED ON THE NORTH SIDE OF
CHANDLER.

IT APPEARS THE STORM WILL MISS THE CITY CENTER AND POINTS WEST. AND IT
PROBABLY WILL PASS TO THE EAST OF SCOTTSDALE. THE STORM SHOULD BE OVER
BEFORE 900 PM MST.

TENHARKEL 180240Z