Flash Flood Warning 57, NWS Phoenix, AZ

AZZALL-300000-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE PHOENIX ARIZONA
310 PM MST WED AUG 29 1990

...STRONG THUNDERSTORMS OVER NORTHERN GILA COUNTY...JUST EAST OF THE
KOHLS RANCH...CHRISTOPHER CREEK...AND PAYSON AREAS...

AT 3 PM MST...WEATHER RADAR DETECTED A COUPLE OF STRONG THUNDERSTORMS
OVER NORTHERN GILA COUNTY. THE STORMS WERE MOVING WESTWARD...AND WILL
PROBABLY AFFECT THE KOHLS RANCH...CHRISTOPHER CREEK...AND PAYSON AREAS
WITHIN THE NEXT HOUR OR TWO...AS WELL AS ARIZONA HIGHWAY 260.

THE THUNDERSTORMS CAN PRODUCE WINDS TO 50 MPH...DEADLY LIGHTNING...
HAIL...AND INTENSE RAINFALL THAT COULD SWELL NORMALLY DRY WASHES.

PERSONS OUT AND ABOUT IN THE FOREMENTIONED AREAS ARE STRONGLY URGED
TO BE ON THE ALERT FOR NASTY WEATHER CONDITIONS FOR THE NEXT FEW
HOURS. IF THREATENING WEATHER APPROACHES OR WATER BEGINS TO RISE
QUICKLY IN YOUR LOCALILITY...GO TO SAFE SHELTER IMMEDIATELY.
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MOTORISTS ARE URGED NOT TO CROSS FLOODED ROADWAY DIPS OR LOW AREAS.

FRANJEVIC
08/29/2215Z  MWF

AZZALL-300100-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE PHOENIX ARIZONA
425 PM MST WED AUG 29 1990

     ...STRONG THUNDERSTORMS DEVELOPING AROUND ARZIONA...

AT 4PM SATELLITE AND RADAR INFORMATION SHOWED THUNDERSTORMS DEVELOPED
ACROSS THE HIGHER ELEVATIONS OF THE STATE.  SCATTERED THUNDERSTORMS
WERE DETECTED OVER THE MOUNTAINS FROM THE GRAND CANYON SOUTHEAST TO
THE MOGOLLON RIM AND WHITE MOUNTAINS.  SHOWERS AND THUNDERSTORMS
WERE ALSO SEEN OVER SOUTH CENTRAL ARIZONA NEAR TUCSON... SOUTH AND
SOUTHWEST TO THE MEXICAN BORDER.

A FEW OF THE THUNDERSTORMS EAST OF PRESCOTT AND EAST AND SOUTHEAST
OF PAYSON HAVE BEEN QUITE STRONG.  ONE THUNDERSTORM IN THE KOHLS
RANCH AND CHRISTOPHER CREEK AREA PRODUCED STRONG WINDS... 0.40 INCHES
OF RAIN IN 20 MINUTES... ALONG WITH MARBLE SIZED HAIL.

THUNDERSTORMS WILL CONTINUE TO DEVELOP ACROSS THE STATE THROUGH THE
EVENING HOURS.  INTENSE THUNDERTORMS HOWEVER WILL BE MORE LIKELY
THIS EVENING ACROSS THE SOUTHERN HALF OF THE STATE... GENERALLY
FROM PAYSON AND PRESCOTT SOUTHWARD.

THE GREATEST AREA OF CONCERN HOWEVER IS OVER FAR SOUTHERN ARIZONA.
WEATHER BALLOON DATA INDICATED A WEATHER DISTURBANCE... LOCATED
NEAR TUCSON THIS MORNING... WILL AID IN THE DEVELOPMENT OF VERY
LARGE THUNDERSTORMS ALONG THE SOUTHERN ARIZONA BORDER... GENERALLY
WEST OF NOGALES.

4PM SATELLITE PICTURES SHOWED A CLUSTER OF STRONG THUNDERSTORMS HAD
DEVELOPED ALONG THE BORDER BETWEEN ORGAN PIPE NATIONAL MONUMENT AND
NOGALES.  THESE THUNDERSTORMS EXPANDED GREATLY IN ONE HOUR AND WERE
MOVING TOWARDS ORGAN PIPE.

THUNDERSTORMS IN GENERAL WERE MOVING FROM WEST TO EAST.  THUNDERSTORMS
THIS EVENING HAVE THE POTENTIAL TO PRODUCE STRONG POSSIBLY DAMAGING
WINDS... HAIL... DEADLY LIGHTNING... AND INTENSE RAINFALL THAT COULD
LEAD TO FLOODING.

VASQUEZ

AZZALL-300100-

SPECIAL WEATHER STATEMENT..CORRECTN TO MVMT OF TSTMS LAST PARAGRAPH
NATIONAL WEATHER SERVICE PHOENIX ARIZONA
425 PM MST WED AUG 29 1990

     ...STRONG THUNDERSTORMS DEVELOPING AROUND ARZIONA...

AT 4PM SATELLITE AND RADAR INFORMATION SHOWED THUNDERSTORMS DEVELOPED
ACROSS THE HIGHER ELEVATIONS OF THE STATE.  SCATTERED THUNDERSTORMS
WERE DETECTED OVER THE MOUNTAINS FROM THE GRAND CANYON SOUTHEAST TO
THE MOGOLLON RIM AND WHITE MOUNTAINS.  SHOWERS AND THUNDERSTORMS
WERE ALSO SEEN OVER SOUTH CENTRAL ARIZONA NEAR TUCSON... SOUTH AND
SOUTHWEST TO THE MEXICAN BORDER.

A FEW OF THE THUNDERSTORMS EAST OF PRESCOTT AND EAST AND SOUTHEAST
OF PAYSON HAVE BEEN QUITE STRONG.  ONE THUNDERSTORM IN THE KOHLS
RANCH AND CHRISTOPHER CREEK AREA PRODUCED STRONG WINDS... 0.40 INCHES
OF RAIN IN 20 MINUTES... ALONG WITH MARBLE SIZED HAIL.

THUNDERSTORMS WILL CONTINUE TO DEVELOP ACROSS THE STATE THROUGH THE
EVENING HOURS.  INTENSE THUNDERTORMS HOWEVER WILL BE MORE LIKELY
THIS EVENING ACROSS THE SOUTHERN HALF OF THE STATE... GENERALLY
FROM PAYSON AND PRESCOTT SOUTHWARD.

THE GREATEST AREA OF CONCERN HOWEVER IS OVER FAR SOUTHERN ARIZONA.
WEATHER BALLOON DATA INDICATED A WEATHER DISTURBANCE... LOCATED
NEAR TUCSON THIS MORNING... WILL AID IN THE DEVELOPMENT OF VERY
LARGE THUNDERSTORMS ALONG THE SOUTHERN ARIZONA BORDER... GENERALLY
WEST OF NOGALES.

4PM SATELLITE PICTURES SHOWED A CLUSTER OF STRONG THUNDERSTORMS HAD
DEVELOPED ALONG THE BORDER BETWEEN ORGAN PIPE NATIONAL MONUMENT AND
NOGALES.  THESE THUNDERSTORMS EXPANDED GREATLY IN ONE HOUR AND WERE
MOVING TOWARDS ORGAN PIPE.

THUNDERSTORMS IN GENERAL WERE MOVING FROM EAST TO WEST. THUNDERSTORMS
THIS EVENING HAVE THE POTENTIAL TO PRODUCE STRONG POSSIBLY DAMAGING
WINDS... HAIL... DEADLY LIGHTNING... AND INTENSE RAINFALL THAT COULD
LEAD TO FLOODING.

VASQUEZ

AZZALL-300330-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE PHOENIX ARIZONA
730 PM MST WED AUG 29 1990

...DUSTSTORM WITH GUSTY WINDS MOVING NORTH ALONG INTERSTATE 10 NEAR
   CASA GRANDE...

VERY LARGE THUNDERSTORMS DEVELOPED AROUND THE TUCSON AREA LATE THIS
AFTERNOON AND EVENING.  THESE THUNDERSTORMS HAVE GENERATED AN
OUTFLOW BOUNDARY OF STRONG 30 TO 45 MPH WINDS WHICH HAVE FORMED A
LARGE DUSTSTORM MOVING NORTH ALONG INTERSTATE 10 TOWARDS PHOENIX.

AT 7PM THE DUSTSTORM STRUCK THE TOWN OF MARANA... 25 MILES NORTHWEST
OF TUCSON... WITH VISIBILITIES AS LOW AS 10 FEET.  AT 730 PM THE
DUSTSTORM MOVED NORTH INTO CASA GRANDE WITH ACCOMPANYING 30 TO 40 MPH
WINDS AND VISIBILITIES LESS THAN 1/2 MILE.

MOTORISTS DRIVING ALONG INTERSTATE 10 SOUTH OF PHOENIX SHOULD USE
CAUTION AND ANTICIPATE LOW VISIBILITIES IN BLOWING DUST.  REMEMBER
DO NOT STOP SUDDENLY ON THE ROADWAY.  IF VISIBILITIES IMPAIR YOUR
VISION PULL OFF THE ROAD AND TAKE YOU]R FOOT OF THE BRAKE. WAIT UNTIL
VISIBILITIES IMPROVE WHICH IS USUALLY 5 TO 10 MINUTES.

GUSTY WINDS AND BLOWING DUST MAY MOVE INTO PORTIONS OF THE GREATER
PHOENIX AREA FROM THE SOUTH LATER THIS EVENING.

VASQUEZ

AZZALL-300500-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE PHOENIX ARIZONA
730 PM MST WED AUG 29 1990

...STRONG THUNDERSTORMS IN SOUTHEAST ARIZONA NEAR SAFFORD...
...DUST STORM APPROACHING THE GREATER PHOENIX AREA FROM THE SOUTH...

AT 830 PM THUNDERSTORMS WERE STILL ACTIVE... AND STRONG ACROSS PORTIONS
OF ARIZONA.  WEATHER RADAR SHOWED A FEW INTENSE THUNDERSTORMS ALONG
STATE HIGHWAY 70 IN THE VICINITY OF FORT THOMAS AND JUST NORTHWEST
OF SAFFORD... BOTH IN SOUTHEAST ARIZONA.  THESE THUNDERSTORMS WERE
LIKELY PRODUCING WERE HEAVY RAIN AS THEY MOVE WEST NORTHWESTWARD
10 TO 15 MPH.

OTHER AREA OF INTENSE THUNDERSTORMS AT 830 PM WERE LOCATED WEST OF
TUCSON ALONG HIGHWAY 86 BETWEEN KIT PEAK AND SELLS.

THE LARGE DUSTSTORM WHICH WAS ALONG INTERSTATE 10 IN THE CASA GRANDE
AREA AT 730 PM WAS STILL MOVING NORTH TOWARDS THE GREATER PHOENIX AREA.
AT 830 PM THE LEADING EDGE OF THE DUSTSTORM EXTENDED FROM THE SMALL
TOWN OF MARICOPA NORTHEAST TO SOUTH CHANDLER.  VISIBILITIES IN
MARICOPA WERE NEAR ZERO AND IN SOUTH CHANDLER BELOW A HALF MILE.

DENSE BLOWING DUST ALONG WITH 25 TO 40 MPH WINDS ARE EXPECTED
TO SPREAD INTO PORTIONS OF THE GREATER PHOENIX AREA WITHIN THE NEXT
2 HOURS.y

REMEMBER DO NOT STOP SUDDENLY ON THE ROADWAY.  IF VISIBILITIES
IMPAIR YOUR VISION OFF THE ROAD AND TAKE YOUR FOOT OFF THE BRAKE.
WAIT UNTIL VISIBILITIES IMPROVE WHICH USUALLY TAKE 5 TO 10 MINUTES.

VASQUEZ