Alert archive / California / Special Weather Statements in 2012

Special Weather Statement, NWS Phoenix, AZ

September 4, 2012Riverside County, California

NWS Phoenix, AZ issued this special weather statement at Sep 4, 2012, 2:54 PM PDT for Riverside County, California. It was in force for 66 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued
Sep 4, 2012, 2:54 PM PDT (21:54 UTC)
Expired
Sep 4, 2012, 4:00 PM PDT
In force
66 min
Issued by
NWS Phoenix, AZ

County Riverside County, CA

The radar

The San Diego radar (KNKX), 154 km from the middle of the area, began a volume at 21:54 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

The text

As transmitted, in the capitals the NWS used until 2016.

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What forecasters said that day

The local office's own words before this special weather statement went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Phoenix, AZ wrote its last area forecast discussion before this special weather statement went out at Sep 4, 2:45 PM PDT, 9 minutes earlier.

Area forecast discussion, Sep 4, 2:45 PM PDT, 9 minutes before
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Hazardous weather outlook, Sep 4, 5:28 AM PDT, 9 hours 26 minutes before
HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE PHOENIX AZ
528 AM MST TUE SEP 4 2012

AZZ021>024-026>028-051300-
WEST CENTRAL DESERTS-NORTHWEST MARICOPA COUNTY-GREATER PHOENIX AREA-
SOUTHERN GILA COUNTY/TONTO NATIONAL FOREST FOOTHILLS-
SOUTHWEST DESERTS-SOUTHWEST MARICOPA COUNTY-
NORTHWEST AND NORTH CENTRAL PINAL COUNTY-
528 AM MST TUE SEP 4 2012

THIS HAZARDOUS WEATHER OUTLOOK IS FOR EAST-CENTRAL ARIZONA...SOUTH-
CENTRAL ARIZONA...SOUTHWEST ARIZONA AND WEST-CENTRAL ARIZONA.

.DAY ONE...TODAY AND TONIGHT.

ISOLATED TO SCATTERED SHOWERS AND THUNDERSTORMS ARE EXPECTED TO
DEVELOP DURING THE AFTERNOON HOURS AND CONTINUE INTO THE EVENING. THE
BEST THREAT FOR THUNDERSTORMS WILL BE OVER THE HIGHER TERRAIN EAST OF
PHOENIX. THE PRIMARY WEATHER HAZARDS INCLUDE GUSTY WINDS IN EXCESS OF
45 MPH...LOCALLY HEAVY RAINFALL WITH LOCALIZED FLOODING OF ROADS AND
WASHES...PATCHY DENSE BLOWING DUST AND DEADLY CLOUD TO GROUND
LIGHTNING.

.DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY.

LOW TO MODERATE GRADE MONSOON CONDITIONS ARE EXPECTED WEDNESDAY
THROUGH THE WEEKEND WITH A GRADUAL DECREASE IN THUNDERSTORM COVERAGE
POSSIBLE SUNDAY INTO MONDAY. ISOLATED TO SCATTERED MAINLY AFTERNOON
AND EVENING THUNDERSTORMS ARE ANTICIPATED EACH DAY WITH THE BEST
CHANCES EXPECTED OVER THE HIGHER TERRAIN AREAS NORTH AND EAST OF
PHOENIX. THE PRIMARY WEATHER HAZARDS INCLUDE GUSTY WINDS IN EXCESS OF
40 MPH...LOCALLY HEAVY RAIN WITH LOCALIZED FLOODING OF STREETS AND
WASHES...PATCHY DENSE BLOWING DUST AND DEADLY CLOUD TO GROUND
LIGHTNING.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION WILL LIKELY BE NEEDED.

AZZ020-025-CAZ030>033-051300-
LOWER COLORADO RIVER VALLEY AZ-YUMA/MARTINEZ LAKE AND VICINITY-
JOSHUA TREE NATIONAL PARK-LOWER COLORADO RIVER VALLEY CA-
RIVERSIDE COUNTY/EASTERN DESERTS-IMPERIAL COUNTY-
528 AM MST TUE SEP 4 2012 /528 AM PDT TUE SEP 4 2012/

THIS HAZARDOUS WEATHER OUTLOOK IS FOR EXTREME SOUTHWEST
ARIZONA...EXTREME WEST-CENTRAL ARIZONA...EXTREME SOUTHEAST
CALIFORNIA AND SOUTHEAST CALIFORNIA.

.DAY ONE...TODAY AND TONIGHT.

EXPECT A SLIGHT CHANCE FOR MAINLY AFTERNOON AND EVENING
THUNDERSTORMS. THE MAIN WEATHER HAZARDS INCLUDE BRIEF HEAVY
RAIN...GUSTY WINDS IN EXCESS OF 40 MPH...PATCHY DENSE BLOWING DUST OR
SAND AND DEADLY CLOUD TO GROUND LIGHTNING WITH THE MORE INTENSE
STORMS.

.DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY.

THERE WILL BE A SLIGHT CHANCE FOR MAINLY AFTERNOON AND EVENING
THUNDERSTORMS WEDNESDAY THROUGH FRIDAY...WITH THE THREAT DIMINISHING
SOMEWHAT FROM THE WEEKEND INTO EARLY NEXT WEEK. THE PRIMARY WEATHER
HAZARDS INCLUDE BRIEF HEAVY RAIN AND LOCALIZED FLOODING OF ROADS AND
WASHES...GUSTY WINDS IN EXCESS OF 40 MPH...PATCHY DENSE BLOWING DUST
AND SAND AND DEADLY CLOUD TO GROUND LIGHTNING.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION WILL LIKELY BE NEEDED.

NATIONAL WEATHER SERVICE PHOENIX IS ON THE INTERNET AT

WEATHER.GOV/PHOENIX

In the hours before

Special weather statement, Sep 4, 1:40 PM PDT, 1 hour 14 minutes before
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Special weather statement, Sep 4, 1:45 PM PDT, 1 hour 9 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE PHOENIX AZ
145 PM MST TUE SEP 4 2012

CAZ030-042130-
RIVERSIDE CA-SAN BERNARDINO CA-
145 PM PDT TUE SEP 4 2012

...SIGNIFICANT WEATHER ADVISORY...

THE NATIONAL WEATHER SERVICE IN PHOENIX HAS ISSUED A

SIGNIFICANT WEATHER ADVISORY FOR...
  SOUTH CENTRAL SAN BERNARDINO COUNTY IN SOUTHERN CALIFORNIA
  NORTH CENTRAL RIVERSIDE COUNTY IN SOUTHERN CALIFORNIA

UNTIL 230 PM PDT

AT 140 PM PDT...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED A
STRONG THUNDERSTORM NEAR TWENTYNINE PALMS...MOVING NORTHEAST AT 10
MPH.

WIND GUSTS OF 45 TO 55 MPH ARE EXPECTED WITH THIS STORM ALONG WITH
HEAVY RAIN AND FREQUENT LIGHTNING.

LOCATIONS IMPACTED INCLUDE...
  NORTHERN PORTIONS OF JOSHUA TREE NATIONAL PARK...
  UTAH TRAIL JTNP ENTRANCE...
  RURAL SOUTHERN SAN BERNARDINO COUNTY...
  RURAL NORTHERN RIVERSIDE COUNTY...

VERY HEAVY RAINFALL MAY CAUSE TEMPORARY PONDING ON SOME ROADS AND
MINOR FLOODING OF POOR DRAINAGE AREAS. IN HEAVY RAINFALL SLOW DOWN TO
REDUCE THE RISK OF HYDROPLANING...AND LEAVE A SAFE DISTANCE BETWEEN
YOURSELF AND OTHER VEHICLES.

FREQUENT CLOUD TO GROUND LIGHTNING IS OCCURRING. IF STORMS APPROACH
YOUR LOCATION OR YOU HEAR THUNDER...MOVE INSIDE A STURDY BUILDING OR
AN ALL METAL VEHICLE.

LAT...LON 3413 11612 3413 11606 3408 11599 3404 11598
      3405 11577 3403 11573 3388 11603 3410 11619
      3413 11613
TIME...MOT...LOC 2044Z 245DEG 9KT 3408 11605

NOLTE
Special weather statement, Sep 4, 2:31 PM PDT, 23 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE PHOENIX AZ
231 PM PDT TUE SEP 4 2012

CAZ032-042230-
RIVERSIDE CA-
231 PM PDT TUE SEP 4 2012

...SIGNIFICANT WEATHER ADVISORY...

THE NATIONAL WEATHER SERVICE IN PHOENIX HAS ISSUED A

SIGNIFICANT WEATHER ADVISORY FOR...
  CENTRAL RIVERSIDE COUNTY IN SOUTHERN CALIFORNIA

UNTIL 330 PM PDT

AT 227 PM PDT...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED AN
AREA OF STRONG THUNDERSTORMS ALONG INTERSTATE 10 NEAR DESERT CENTER...
GENERALLY MOVING TO THE EAST NORTHEAST.

LOCALLY DENSE BLOWING DUST IS POSSIBLE.

LOCATIONS IMPACTED INCLUDE...
  INTERSTATE 10 NEAR DESERT CENTER...
  RURAL CENTRAL RIVERSIDE COUNTY...

LOCALLY DENSE BLOWING DUST IS POSSIBLE. IF YOU ENCOUNTER BLOWING DUST
WHILE DRIVING...PULL OVER AS FAR OFF THE ROADWAY AS POSSIBLE AND
PARK. TURN OFF YOUR HEADLIGHTS AND KEEP YOUR FOOT OFF THE BRAKE.

FREQUENT CLOUD TO GROUND LIGHTNING IS OCCURRING. IF STORMS APPROACH
YOUR LOCATION OR YOU HEAR THUNDER...MOVE INSIDE A STURDY BUILDING OR
AN ALL METAL VEHICLE.

LAT...LON 3376 11544 3376 11507 3363 11516 3358 11527
      3351 11540 3351 11563
TIME...MOT...LOC 2131Z 243DEG 5KT 3365 11529

NOLTE
Special weather statement, Sep 4, 2:54 PM PDT, 0 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE PHOENIX AZ
254 PM MST TUE SEP 4 2012

CAZ030-032-042300-
RIVERSIDE CA-
254 PM PDT TUE SEP 4 2012

...SIGNIFICANT WEATHER ADVISORY...

THE NATIONAL WEATHER SERVICE IN PHOENIX HAS ISSUED A

SIGNIFICANT WEATHER ADVISORY FOR...
  CENTRAL RIVERSIDE COUNTY IN SOUTHERN CALIFORNIA

UNTIL 400 PM PDT

AT 250 PM PDT...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED A
STRONG THUNDERSTORM NEAR CHIRIACO SUMMIT...MOVING NORTHEAST AT 10
MPH.

WIND GUSTS OF 40 TO 50 MPH ARE EXPECTED WITH THIS STORM ALONG WITH
HEAVY RAINFALL.

LOCATIONS IMPACTED INCLUDE...
  CHIRIACO SUMMIT...
  INTERSTATE 10 NEAR CHIRIACO SUMMIT...
  RURAL CENTRAL RIVERSIDE COUNTY...

LOCALLY DENSE BLOWING DUST IS POSSIBLE. IF YOU ENCOUNTER BLOWING DUST
WHILE DRIVING...PULL OVER AS FAR OFF THE ROADWAY AS POSSIBLE AND
PARK. TURN OFF YOUR HEADLIGHTS AND KEEP YOUR FOOT OFF THE BRAKE.

VERY HEAVY RAINFALL MAY CAUSE TEMPORARY PONDING ON SOME ROADS AND
MINOR FLOODING OF POOR DRAINAGE AREAS. IN HEAVY RAINFALL SLOW DOWN TO
REDUCE THE RISK OF HYDROPLANING...AND LEAVE A SAFE DISTANCE BETWEEN
YOURSELF AND OTHER VEHICLES.

LAT...LON 3381 11572 3376 11553 3359 11565 3363 11581
TIME...MOT...LOC 2153Z 208DEG 9KT 3368 11569

NOLTE

The office that day

Everything else NWS Phoenix, AZ issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Sep 3, 5:09 PM PDTFlash Flood WarningPSRLa Paz, Yuma3 hr
Sep 3, 5:42 PM PDTFlash Flood WarningPSRMaricopa3 hr
Sep 3, 6:20 PM PDTSpecial Weather StatementPSR55 min
Sep 4, 1:37 AM PDTSpecial Weather StatementPSRPinal38 min
Sep 4, 1:59 AM PDTAreal Flood AdvisoryPSRPinal2 hr
Sep 4, 1:40 PM PDTSpecial Weather StatementPSR50 min
Sep 4, 2:31 PM PDTSpecial Weather StatementPSR59 min
Sep 4, 2:39 PM PDTSevere Thunderstorm WarningPSRMaricopa66 min
Sep 4, 3:12 PM PDTSpecial Weather StatementPSR48 min
Sep 4, 3:19 PM PDTFlash Flood WarningPSRGila101 min
Sep 4, 3:28 PM PDTAreal Flood AdvisoryPSRMaricopa2 hr
Sep 4, 3:49 PM PDTSpecial Weather StatementPSRGila26 min
Sep 4, 4:17 PM PDTSevere Thunderstorm WarningPSRGila43 min
Sep 4, 4:25 PM PDTFlash Flood WarningPSRGila2 hr
Sep 4, 4:48 PM PDTSpecial Weather StatementPSR57 min
Sep 3, 6:41 PM PDTAreal Flood AdvisoryPSRRiverside3 hr
Sep 4, 1:45 PM PDTSpecial Weather StatementPSRRiverside45 min
Sep 4, 1:55 PM PDTFlash Flood WarningPSRRiverside, San Bernardino95 min
Sep 4, 2:42 PM PDTAreal Flood AdvisoryPSRRiverside94 min
Sep 4, 3:18 PM PDTAreal Flood AdvisoryPSRRiverside, San Bernardino80 min
Sep 4, 3:33 PM PDTSpecial Weather StatementPSRImperial57 min
Sep 4, 3:56 PM PDTBlowing Dust AdvisoryPSR2 hr
Sep 4, 3:57 PM PDTSpecial Weather StatementPSRRiverside78 min
Sep 4, 4:09 PM PDTFlash Flood WarningPSRImperial92 min
Sep 4, 4:57 PM PDTSpecial Weather StatementPSRRiverside48 min

Nearby

Special Weather Statements in California, 2012Every special weather statement in 2012

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; radar from the NEXRAD Level II archive.