928
FNUS86 KSGX 211244
FWLSGX

ECCDA DISCUSSIONS
NATIONAL WEATHER SERVICE SAN DIEGO CA
544 AM PDT THU AUG 21 2025

ECC033-220645-
ORANGE ECC DISPATCH-
DISCUSSION FOR ORANGE ECC DISPATCH
544 AM PDT THU AUG 21 2025

THE HEAT IS EXPECTED TO PEAK FOR MOST AREAS TODAY AND FRIDAY WITH
SLIGHT COOLING FOR THE WEEKEND AND CONTINUED COOLING EARLY NEXT WEEK
TO AROUND AVERAGE FOR THE MIDDLE OF NEXT WEEK. MONSOONAL MOISTURE
WILL INCREASE INTO THE WEEKEND WITH INCREASING CHANCES FOR SHOWERS
AND THUNDERSTORMS OVER THE WEEKEND, MOST LIKELY  DURING THE
AFTERNOON AND EARLY EVENING, AND MOSTLY FOR THE  MOUNTAINS AND
DESERTS. THERE WILL BE GRADUAL DRYING OF THE  MONSOONAL MOISTURE FOR
THE MIDDLE AND LATTER PART OF NEXT WEEK  WITH DECREASING CHANCES FOR
SHOWERS AND THUNDERSTORMS.

$$

ECC035-220645-
MONTE VISTA ECC DISPATCH-
544 AM PDT THU AUG 21 2025

THE HEAT IS EXPECTED TO PEAK FOR MOST AREAS TODAY AND FRIDAY WITH
SLIGHT COOLING FOR THE WEEKEND AND CONTINUED COOLING EARLY NEXT WEEK
TO AROUND AVERAGE FOR THE MIDDLE OF NEXT WEEK. MONSOONAL MOISTURE
WILL INCREASE INTO THE WEEKEND WITH INCREASING CHANCES FOR SHOWERS
AND THUNDERSTORMS OVER THE WEEKEND, MOST LIKELY  DURING THE
AFTERNOON AND EARLY EVENING, AND MOSTLY FOR THE  MOUNTAINS AND
DESERTS. THERE WILL BE GRADUAL DRYING OF THE  MONSOONAL MOISTURE FOR
THE MIDDLE AND LATTER PART OF NEXT WEEK  WITH DECREASING CHANCES FOR
SHOWERS AND THUNDERSTORMS.

$$

ECC034-220645-
RIVERSIDE ECC DISPATCH-
544 AM PDT THU AUG 21 2025

...DISCUSSION FROM LAXFWFSGX...

THE HEAT IS EXPECTED TO PEAK FOR MOST AREAS TODAY AND FRIDAY WITH
SLIGHT COOLING FOR THE WEEKEND AND CONTINUED COOLING EARLY NEXT WEEK
TO AROUND AVERAGE FOR THE MIDDLE OF NEXT WEEK. MONSOONAL MOISTURE
WILL INCREASE INTO THE WEEKEND WITH INCREASING CHANCES FOR SHOWERS
AND THUNDERSTORMS OVER THE WEEKEND, MOST LIKELY  DURING THE
AFTERNOON AND EARLY EVENING, AND MOSTLY FOR THE  MOUNTAINS AND
DESERTS. THERE WILL BE GRADUAL DRYING OF THE  MONSOONAL MOISTURE FOR
THE MIDDLE AND LATTER PART OF NEXT WEEK  WITH DECREASING CHANCES FOR
SHOWERS AND THUNDERSTORMS.

...DISCUSSION FROM PHXFWFPSR...

WELL ABOVE NORMAL TEMPERATURES ARE EXPECTED THROUGH AT LEAST THE
NEXT COUPLE OF DAYS AS TEMPERATURES APPROACH RECORD LEVELS.
ADDITIONALLY, MOISTURE WILL CONTINUE TO INCREASE ACROSS THE AREA,
LEADING TO INCREASING THUNDERSTORM CHANCES. BEST SHOWER AND STORM
CHANCES THIS AFTERNOON AND EVENING WILL BE ACROSS THE HIGHER
TERRAIN EAST OF PHOENIX (30-60%), HOWEVER THERE IS A 10-20%  CHANCE
THAT SOME ISOLATED SHOWERS AND STORMS COULD SURVIVE INTO  THE LOWER
DESERTS OF SOUTH-CENTRAL AZ, INCLUDING THE PHOENIX  METRO. TOMORROW,
SHOWER AND STORM CHANCES MOVE INTO SE CA AND SW  AZ, WITH A 30-50%
CHANCE ACROSS THE HIGHER TERRAIN EAST OF  PHOENIX, A 20-30% CHANCE
ACROSS THE LOWER DESERTS OF SOUTH- CENTRAL AZ, INCLUDING PHOENIX,
AND A 20-40% CHANCE ACROSS SE CA  AND SW AZ. THE PRIMARY THREATS
WITH ANY STRONGER THUNDERSTORMS  WILL BE LOCALIZED HEAVY DOWNPOURS,
LIGHTNING, AND GUSTY, ERRATIC  OUTFLOW WINDS. CHANCES FOR SEEING
OUTFLOW WIND GUSTS IN EXCESS OF  35 MPH TODAY (TOMORROW) CLIMB
UPWARDS OF 70% (30-50%) FOR SOUTHERN GILA, EASTERN MARICOPA, AND NW
PINAL COUNTIES, WITH A 10% CHANCE  OF SEEING GUSTS IN EXCESS OF
58 MPH TODAY AND TOMORROW. OUTSIDE OF ANY THUNDERSTORMS, WINDS WILL
OVERALL CONTINUE TO FAVOR DIURNAL  UPSLOPE/DOWNVALLEY PATTERNS WITH
OCCASIONAL AFTERNOON GUSTS AROUND 15-20 MPH. MIN RHS WILL REMAIN
AROUND 15-25% OVER THE NEXT COUPLE OF DAYS, WHILE OVERNIGHT MAX RHS
INCREASE TO UPWARDS OF 30-50%  FOR MOST AREAS.

...THUNDERSTORMS IMPLY GUSTY WINDS...

NOTE...ADDITIONAL FIRE WEATHER FORECAST INFORMATION CAN BE FOUND IN
THE AREA FORECAST DISCUSSION. SEE PRODUCT PHXAFDPSR.

$$