Flash Flood Warning 26, NWS Tucson, AZ

000 
WGUS75 KTWC 310332
FFSTWC

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE TUCSON AZ
826 PM MST MON JUL 30 2007

AZC019-310445-
/X.CON.KTWC.FF.W.0026.000000T0000Z-070731T0445Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
PIMA AZ-
826 PM MST MON JUL 30 2007

...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 945 PM MST FOR
NORTHEASTERN PIMA COUNTY...

AT 826 PM MST...AN AUTOMATED RAIN GAGE REPORTED 2.011 INCHES OF RAIN 
HAD FALLEN AT THE CANADA DEL ORO WASH AND BIG WASH AND ANOTHER GAGE 
AT BIG WASH AND RANCHO VISTOSO BOULEVARD REPORTED 1.46 INCHES. 
DOPPLER RADAR INDICATED THAT THESE STORMS HAVE REMAINED STATIONARY 
OVER THE ORO VALLEY AREA WITH AN ADDITIONAL QUARTER TO HALF INCH OF 
RAIN STILL EXPECTED IN THE NEXT HALF HOUR. BIG WASH...THE CANADA DEL 
ORO WASH...SAUSAULITO CREEK...CHALK CREEK ARE ALL LIKELY FILLED WITH 
SWIFT MOVING WATER. 

EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLASH FLOODING OF 
NORMALLY DRY WASHES...ROADWAY DIPS AND OTHER LOW LYING AND POOR 
DRAINAGE AREAS. 

FLOODING IS OCCURRING OR IS IMMINENT. MOST FLOOD RELATED DEATHS OCCUR
IN AUTOMOBILES. DO NOT ATTEMPT TO CROSS THROUGH RUNNING WATER OF 
UNKNOWN DEPTH. 

LAT...LON 3229 11101 3242 11088 3251 11096 3251 11123

$$

WEATHER.GOV/TUCSON

000 
WGUS75 KTWC 310437
FFSTWC

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE TUCSON AZ
936 PM MST MON JUL 30 2007

AZC019-310446-
/X.EXP.KTWC.FF.W.0026.000000T0000Z-070731T0445Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
PIMA AZ-
936 PM MST MON JUL 30 2007

...THE FLASH FLOOD WARNING WILL EXPIRE AT 945 PM MST FOR NORTHEASTERN
PIMA COUNTY...

ALTHOUGH RAINFALL FROM THE STRONG STORMS EARLIER THIS EVENING WILL 
CONTINUE TO DRAIN INTO THE BIG WASH...THE CANADA DEL ORO WASH... 
SAUSAULITO CREEK AND CHALK CREEK...THE THREAT OF FLASH FLOODING HAS 
SUBSIDED. THEREFORE...THE FLASH FLOOD WARNING HAS BEEN ALLOWED TO 
EXPIRE AT 945 PM MST. 

LAT...LON 3229 11101 3242 11088 3251 11096 3251 11123

$$

WEATHER.GOV/TUCSON

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE TUCSON AZ
345 PM MST MON JUL 30 2007

.SYNOPSIS...AN UPPER LEVEL LOW OVER NORTHWEST CHIHUAHUA WILL
GRADUALLY DRIFT WEST OVER THE NEXT SEVERAL DAYS...KEEPING THE REGION
IN AN ACTIVE MONSOON PATTERN THROUGH MOST OF THE WEEK.

&&

.DISCUSSION...SOME DEBRIS CLOUD WITH A LITTLE FLAT CU FIELD
ENHANCEMENT INHIBITING HEATING THIS MORNING. DECENT LOOKING 12Z KTUS
SOUNDING WITH PRECIPITABLE WATER AT 1.61 AND NICELY UNSTABLE WITH
TEMPERATURE RECOVERY AT LOWER LEVELS AND A DEGREE OF COOLING FROM H5
TO H6. ONCE WE GET SOME HEATING AND HIT LOWER 90S MOUNTAINS WERE
EARLY TO BUILD. ONLY INHIBITION SO FAR IS CIRRUS HAS BLOWN OFF IN
DIRECTION OF PATH OF STORMS AND GENERALLY OVER VALLEYS. ULTIMATELY
OUTFLOWS WILL HAVE NO TROUBLE SUPPORTING CONVECTION IN THE
VALLEYS...BUT FOR SOME LOCATIONS IT MAY BE IN THE EVENING HOURS.

WEAK MID LEVEL DIRECTIONAL SHEAR COMBINED WITH SLOW STORM EASTERLY
STORM MOVEMENT (BUT LIKELY INCREASING A LITTLE THROUGH THE DAY) HAS
MADE FOR RATHER CONGESTED INITIAL THUNDERSTORM DEVELOPMENT.
SUBSEQUENT STRONG OUTFLOWS SHOULD HELP TO BREAK THINGS OUT AS STORMS
PROPAGATE ACROSS VALLEY BY EARLY IN THE AFTERNOON. WET MICROBURST
AND LOCALLY HEAVY RAINFALL THE MAIN CONCERN. ACTIVITY PUSHING IN
FROM NEW MEXICO WILL HAVE TO BE MONITORED CLOSELY AS THE ATMOSPHERE
IS PRIMED TO SUPPORT CONVECTION OVERNIGHT.

NICE LOW ACROSS CHIHUAHUA SOUTH OF WEST TEXAS HELPING TO STRENGTHEN
UPPER LEVEL DIFFLUENT FIELD...AND SHOULD BECOME MORE OF A PLAYER
OVER THE NEXT 72 HOURS. NICE H7 THETA-E RIDGE NOSING FROM CHIHUAHUA
INTO ARIZONA AS WELL.

&&

.AVIATION...A MORE TYPICAL THUNDERSTORM PATTERN CAN BE EXPECTED
TODAY WITH THUNDERSTORMS DEVELOPING IN THE MOUNTAINS AND SKY ISLANDS
BY NOON AND IMPACTING VALLEY LOCATIONS IN THE AFTERNOON AND EVENING.
STRONG WINDS AND HEAVY DOWNPOURS MAY AFFECT TAF SITES TODAY.
AVIATION DISCUSSION NOT UPDATED FOR TAF AND TWEB AMENDMENTS.

&&

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

&&

WEATHER.GOV/TUCSON