Severe Thunderstorm Warning 28, NWS Tucson, AZ

000 
WWUS55 KTWC 182126
SVSTWC

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TUCSON AZ
226 PM MST SAT JUL 18 2009

AZC019-182145-
/O.CON.KTWC.SV.W.0028.000000T0000Z-090718T2145Z/
PIMA AZ-
226 PM MST SAT JUL 18 2009

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 245 PM MST
FOR NORTHWESTERN PIMA COUNTY...

AT 223 PM MST...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE AN AREA OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING DAMAGING 
WINDS IN EXCESS OF 60 MPH. THESE STORMS EXTENDED FROM 10 MILES EAST OF
AJO TO NEAR HICKIWAN...MOVING WEST AT 25 MPH.

LAT...LON 3194 11291 3203 11325 3227 11323 3248 11311
      3248 11262 3246 11234 3238 11215 3213 11234
      3194 11260
TIME...MOT...LOC 2125Z 102DEG 32KT 3220 11298

$$

000 
WWUS55 KTWC 182152
SVSTWC

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TUCSON AZ
252 PM MST SAT JUL 18 2009

AZC019-182158-
/O.EXP.KTWC.SV.W.0028.000000T0000Z-090718T2145Z/
PIMA AZ-
252 PM MST SAT JUL 18 2009

...THE SEVERE THUNDERSTORM WARNING FOR NORTHWESTERN PIMA COUNTY HAS
EXPIRED...

AT 246 PM MST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED 
THAT THE THUNDERSTORMS HAD WEAKENED TO BELOW SEVERE LEVELS. THUS THE 
SEVERE THUNDERSTORM WARNING HAS BEEN ALLOWED TO EXPIRE.

LAT...LON 3194 11291 3203 11325 3227 11323 3248 11311
      3248 11262 3246 11234 3238 11215 3213 11234
      3194 11260
TIME...MOT...LOC 2126Z 102DEG 32KT 3220 11299

$$

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE TUCSON AZ
135 PM MST SAT JULY 18 2009

.SYNOPSIS...STRONG HIGH PRESSURE ALOFT WILL BRING HOT CONDITIONS TO
SOUTHEAST ARIZONA THROUGH AT LEAST THE MIDDLE OF THE UPCOMING WEEK.
MOISTURE WILL ALSO BE SUFFICIENT FOR THE DAILY CYCLE OF SCATTERED
MAINLY AFTERNOON AND EVENING SHOWERS AND THUNDERSTORMS. SOME
THUNDERSTORMS THIS EVENING WILL BE CAPABLE OF PRODUCING LOCALLY
DAMAGING WINDS.

&&

.DISCUSSION...KEMX WSR-88D DETECTED ISOLATED 40-55 DBZ ECHOES MOVING
WWD ACROSS WRN AND CENTRAL PIMA COUNTY AT 2030Z. ACTIVITY WAS AHEAD
OF VORT MAX OVER NRN SONORA. OTHER CELLS WERE NEAR HANNAGAN MEADOW
IN NRN GREENLEE COUNTY. AS NOTED IN SWODY1 THUNDERSTORMS EXPECTED TO
CONTINUE TO DEVELOP DURING THE NEXT SEVERAL HOURS ESPECIALLY ACROSS
THE ERN HIGHER TERRAIN AND SUBSEQUENTLY MOVE WWD. AS WAS THE CASE
FRI...THE MAIN THREAT LATER THIS AFTERNOON AND EVENING WILL BE
STRONG...GUSTY AND POTENTIALLY DAMAGING WINDS. WILL REFLECT THIS
SCENARIO IN THE GRIDDED DATA WEATHER FIELDS AND ASSOCIATED TEXT
PRODUCTS. SIMILAR SCENARIO MAY OCCUR SUN ALTHOUGH 18/12Z NAM BUFR
SOUNDINGS DEPICTED A MARKED REDUCTION IN THE MID-LEVEL FLOW.

THEREAFTER...HIGH PRESSURE ALOFT PROGGED VIA 18/12Z GFS/ECMWF TO
REMAIN CENTERED OVER AZ...OR VICINITY THE FOUR CORNERS REGION...
DURING THE UPCOMING WEEK. WILL CONTINUE TO DEPICT EITHER A SLIGHT
CHANCE OR LOW-END CHANCE-CATEGORY POPS DURING THE AFTERNOON AND
EVENING PERIODS. WILL OPT FOR NEAR-RECORD HIGH TEMPS FOR SE PINAL
AND PIMA COUNTIES SUN. OTHERWISE...DAYTIME HIGH TEMPS DURING MUCH OF
THIS FORECAST PERIOD TO BE ABOUT 5-10 DEGS ABOVE NORMAL.

&&

.AVIATION...EXPECT ISOLATED TO SCATTERED TSRA/SHRA THE REST OF THIS
AFTERNOON AND EVENING. THE STRONGEST TSRA WILL BE ACCOMPANIED WITH
WIND GUSTS OF 50-60 KTS. OTHERWISE...SCT-BKN MAINLY CUMULOFORM
CLOUDS WITH BASES 10-12K FT AGL. SURFACE WINDS INTO TONIGHT MOSTLY
SLY/SELY 5-15 KTS. TSRA/SHRA TO DECREASE IN COVERAGE AFTER 19/06Z
THOUGH CONVECTIVE CLOUD DEBRIS MAINLY ABOVE 12K FT AGL TO CONTINUE
LATE TONIGHT INTO SUNDAY MORNING. AVIATION DISCUSSION NOT UPDATED
FOR TAF AMENDMENTS.

&&

.FIRE WEATHER...ISOLATED TO SCATTERED THUNDERSTORMS WILL OCCUR
DURING THE UPCOMING WEEK...WITH THE BULK OF ACTIVITY DURING THE
AFTERNOON AND EARLY NIGHTTIME HOURS. SURFACE WINDS GENERALLY FROM
THE SOUTHEAST AND SOUTH TODAY AND TONIGHT...THEN A DIURNALLY DRIVEN
WIND REGIME ON TAP EARLY DURING THE UPCOMING WEEK.

&&

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

BF

WEATHER.GOV/TUCSON

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE TUCSON AZ
800 AM MST SAT JUL 18 2009

AZZ019-029-030-033>035-191200-
NORTHERN GREENLEE COUNTY-SOUTHEAST PINAL COUNTY-
UPPER GILA RIVER VALLEY-TUCSON METRO/MARANA/GREEN VALLEY-
SANTA CRUZ COUNTY-COCHISE COUNTY-
800 AM MST SAT JUL 18 2009

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

.DAY ONE...TODAY AND TONIGHT

EXPECT ISOLATED TO SCATTERED SHOWERS AND THUNDERSTORMS ACROSS THE
AREA ESPECIALLY THIS AFTERNOON AND EVENING. THE MAIN THREAT WILL
BE GUSTY AND POTENTIALLY DAMAGING WINDS. RAINFALL AMOUNTS WILL
GENERALLY BE LESS THAN ONE HALF OF AN INCH THOUGH ISOLATED AMOUNTS
IN EXCESS OF ONE INCH MAY OCCUR. THE BULK OF THE ACTIVITY IS
EXPECTED TO END BY MIDNIGHT.

.DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY

THE DAILY CYCLE OF ISOLATED TO SCATTERED SHOWERS AND THUNDERSTORMS
IS EXPECTED DURING THE UPCOMING WEEK...MAINLY DURING THE AFTERNOON
AND EARLY NIGHTTIME HOURS.

.SPOTTER INFORMATION STATEMENT...

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

AZZ031-032-191200-
WESTERN PIMA COUNTY-TOHONO OODHAM NATION-
800 AM MST SAT JUL 18 2009

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

.DAY ONE...TODAY AND TONIGHT

EXPECT ISOLATED SHOWERS AND THUNDERSTORMS ACROSS THE AREA MAINLY
THIS EVENING. THE MAIN THREAT WILL BE GUSTY AND POTENTIALLY
DAMAGING WINDS AS WELL AS BLOWING DUST RESULTING IN REDUCED
VISIBILITY. RAINFALL AMOUNTS WILL GENERALLY BE LESS THAN ONE HALF
OF AN INCH. THE BULK OF THE ACTIVITY IS EXPECTED TO END BY
DAYBREAK SUNDAY.

.DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY

THERE WILL BE A SLIGHT CHANCE OF MAINLY LATE AFTERNOON AND EVENING
SHOWERS AND THUNDERSTORMS DURING THE UPCOMING WEEK.

.SPOTTER INFORMATION STATEMENT...

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

WEATHER.GOV/TUCSON