Severe Thunderstorm Warning 39, NWS Tucson, AZ

505 
WWUS55 KTWC 250140
SVSTWC

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TUCSON AZ
640 PM MST SAT JUL 24 2010

AZC019-021-250200-
/O.CON.KTWC.SV.W.0039.000000T0000Z-100725T0200Z/
PIMA AZ-PINAL AZ-
640 PM MST SAT JUL 24 2010

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 700 PM MST
FOR SOUTHEASTERN PINAL AND NORTHEASTERN PIMA COUNTIES...

AT 635 PM MST...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING DAMAGING WINDS IN
EXCESS OF 60 MPH.  THIS STORM WAS LOCATED NEAR CATALINA AND ORO 
VALLEY...MOVING NORTHEAST AT 5 MPH.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

EXPECT DAMAGING WINDS IN EXCESS OF 60 MPH AND HEAVY RAIN WITH THIS 
STORM.

&&

LAT...LON 3264 11084 3243 11069 3235 11096 3249 11115
TIME...MOT...LOC 0139Z 231DEG 6KT 3248 11091

$$

MEYER

591 
WWUS55 KTWC 250158
SVSTWC

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TUCSON AZ
658 PM MST SAT JUL 24 2010

AZC019-021-250205-
/O.EXP.KTWC.SV.W.0039.000000T0000Z-100725T0200Z/
PIMA AZ-PINAL AZ-
658 PM MST SAT JUL 24 2010

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN PINAL AND
NORTHEASTERN PIMA COUNTIES WILL EXPIRE AT 700 PM MST...

AT 655 PM MST THE THUNDERSTORM NEAR ORO VALLEY AND CATALINA HAD 
DIMINISHED IN INTENSITY AND DRIFTED NORTHEAST AND NORTH. THE WARNING 
WILL BE ALLOWED TO EXPIRE AT 7 PM.

AN URBAN AND SMALL STREAM FLOOD ADVISORY FOR THE HEAVY RAINFALL AND 
RUNOFF CONTINUES FOR THIS AREA UNTIL 930 PM.

LAT...LON 3264 11084 3243 11069 3235 11096 3249 11115
TIME...MOT...LOC 0155Z 231DEG 6KT 3250 11089

$$

MEYER

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE TUCSON AZ
310 PM MST SAT JUL 24 2010

.SYNOPSIS...PLENTY OF MOISTURE WILL RESULT IN A CHANCE OF MAINLY
AFTERNOON AND EVENING THUNDERSTORMS THROUGH THE NEXT SEVEN DAYS.

&&

.DISCUSSION...STARTED OFF THE DAY WITH FULL SUNSHINE AND WITH A VERY
MOIST ATMOSPHERE IN PLACE...IT DIDN'T TAKE LONG FOR DEVELOPMENT TO
GET GOING OVER/NEAR THE HIGHER TERRAIN. DOPPLER RADAR ESTIMATED
RAINFALL IN A FEW AREAS IN COCHISE COUNTY MAY HAVE RECORDED UP
TO 2 INCHES WITH A FEW SPOTS ON THE NORTH SIDE OF THE CATALINAS
RECORDING UP TO AN INCH. AS OF 3 PM MST...ISOLATED TO WIDELY
SCATTERED ACTIVITY WAS MAINLY IN GREENLEE...GRAHAM AND COCHISE
COUNTIES. I HAVE ADJUSTED POPS FOR THIS EVENING WITH LESS THAN 20%
FROM TUCSON WEST AND THE HIGHER POPS EAST OF TUCSON. MAIN THREAT
TONIGHT FROM SLOW MOVING STORMS WILL BE HEAVY RAIN LEADING TO VERY
LOCALIZED FLASH FLOODING PROBLEMS.

ACTIVITY WILL BE DIMINISHING AFTER THE SETTING SUN BUT WILL HOLD ON
TO A SLIGHT CHANCE...MAINLY EASTERN SECTIONS...AS UPPER LOW OVER THE
STATE OPENS UP AS IT MOVES SLOWLY TO THE EAST.

SUNDAY...UPPER TROF WILL GENERALLY BE ALONG THE AZ/NM BORDER WITH
NORTHERLY FLOW INCREASING OVER THE AREA. FURTHER NORTH THE UPPER
HIGH WILL BE MOVING THROUGH THE GREAT BASIN. STILL PLENTY OF
MOISTURE AROUND FOR SCATTERED AFTERNOON/EVENING THUNDERSTORMS...WITH
HEAVY RAIN THE MAIN THREAT.

MONDAY...FLOW ALOFT BECOMES MORE EASTERLY AS UPPER HIGH MOVES TO
NEAR THE FOUR CORNERS. THIS WILL ALLOW THE TROUGH OVER WESTERN NEW
MEXICO TO MOVE WEST OVER THE AREA AS AN INVERTED TROF. THUS
EXPECTING BETTER UPPER DYNAMICS TO PROVIDE BETTER AREAL COVERAGE OF
STORMS. HEAVY RAIN WILL STILL BE MAIN THREAT FROM STORMS.

TUESDAY THROUGH FRIDAY...STANDARD MONSOON FORECAST IN PLACE WITH
LITTLE WIGGLES/SPINNERS ENHANCING ACTIVITY.

&&

.AVIATION...WDLY SCTD TS/SHRA...MAINLY E OF TUCSON...WILL
DIMINISH/END AFTER 24/05Z...THEN REDEVELOP AGAIN AFTER 24/18Z. GUSTS
UP TO 40 KNOTS NEAR STORMS THIS EVENING AND ONCE AGAIN ON SUNDAY.
OTHERWISE SURFACE WINDS AWAY FROM THUNDERSTORMS WILL GENERALLY BE
LESS THAN 10 KNOTS. AVIATION DISCUSSION NOT UPDATED FOR TAF
AMENDMENTS.

&&

.FIRE WEATHER...NO FIRE WEATHER CONCERNS AT THIS TIME.

&&

.TWC WATCHES/WARNINGS/ADVISORIES...NONE.

WEATHER.GOV/TUCSON

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE TUCSON AZ
1033 AM MST SAT JUL 24 2010

AZZ019-029>035-250700-
NORTHERN GREENLEE COUNTY-SOUTHEAST PINAL COUNTY-
UPPER GILA RIVER VALLEY-WESTERN PIMA COUNTY-TOHONO OODHAM NATION-
TUCSON METRO/MARANA/GREEN VALLEY-SANTA CRUZ COUNTY-COCHISE COUNTY-
1033 AM MST SAT JUL 24 2010

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF SOUTH CENTRAL
ARIZONA AND SOUTHEAST ARIZONA.

.DAY ONE...TODAY AND TONIGHT

EXTREMELY MOIST ATMOSPHERE REMAINS IN PLACE OVER ALL OF SOUTHEAST
ARIZONA. EXPECT SLOW MOVING HEAVY RAINFALL PRODUCING THUNDERSTORMS
TO DEVELOP OVER MUCH OF THE AREA THIS AFTERNOON. ISOLATED STRONG
WIND GUSTS WILL BE POSSIBLE IN THE STRONGER STORMS.

.DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY

AN ACTIVE MONSOON PATTERN WILL CONTINUE THROUGH THE PERIOD...WITH
HEAVY RAIN THE MAIN THREAT.

.SPOTTER INFORMATION STATEMENT...

WEATHER SPOTTERS ARE ENCOURAGED TO REPORT SIGNIFICANT WEATHER
CONDITIONS ACCORDING TO STANDARD OPERATING PROCEDURES.

WEATHER.GOV/TUCSON

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE TUCSON AZ
608 PM MST SAT JUL 24 2010

AZZ029-250230-
SOUTHEAST PINAL COUNTY AZ-
608 PM MST SAT JUL 24 2010

...SIGNIFICANT WEATHER ADVISORY FOR SOUTHEAST PINAL COUNTY UNTIL 730
PM MST...

AT 6 PM MST STRONG THUNDERSTORMS HAD GENERATED AN OUTFLOW WITH
BLOWING DUST PUSHING THROUGH PORTIONS OF SOUTHEAST PINAL COUNTY.

EXPECT VISIBILITIES TO BE REDUCED TO 1 MILE AT TIMES WITH LOCALIZED
BRIEFLY LOWER VISIBILITIES POSSIBLE.

AREAS AFFECTED INCLUDE...ELOY...RED ROCK...PICACHO PEAK...PICACHO AND
FRIENDLY CORNERS.

BLOWING DUST CAN QUICKLY REDUCE VISIBILITY...CAUSING ACCIDENTS
THAT MAY INVOLVE CHAIN COLLISIONS AND MULTIPLE PILEUPS. IF DENSE
DUST IS OBSERVED BLOWING ACROSS A ROADWAY...PULL YOUR VEHICLE OFF
THE PAVEMENT AS FAR AS POSSIBLE TO STOP. TURN OFF THE LIGHTS...SET
THE EMERGENCY BRAKE...AND TAKE YOUR FOOT OFF THE BRAKE PEDAL TO
ENSURE BRAKE LIGHTS ARE NOT ILLUMINATED

LAT...LON 3304 11122 3252 11124 3252 11164 3270 11170

MEYER