Alert archive / California / Severe Thunderstorm Warnings in 2003
Severe Thunderstorm Warning 65, NWS Phoenix, AZ
NWS Phoenix, AZ issued this severe thunderstorm warning at Sep 2, 2003, 2:27 PM PDT for Riverside County, San Bernardino County, California. It was in force for 63 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 2, 2003, 2:27 PM PDT (21:27 UTC)
- Expired
- Sep 2, 2003, 3:30 PM PDT
- In force
- 63 min
- Issued by
- NWS Phoenix, AZ
- Area
- Counties, with a storm outline in the text
Did it verify
Not verified. The Iowa Environmental Mesonet's Cow found no qualifying storm report inside this severe thunderstorm warning while it was in force. That is not proof nothing happened: reports are thin where few people live.
Cow counts a report within 15 km of the polygon while the warning was in force: a tornado for a tornado warning; hail of 1 inch or more, a gust of 58 mph or more or wind damage for a severe thunderstorm warning; a flash flood report for a flash flood warning.
The nearest sounding before it
San Diego, CA (KNKX), launched 12:00Z, 9.5 hours before the alert went out and 162 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.
- Mixed-layer CAPE
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 1284 m above ground
- 0-6 km bulk shear
- 13 kt
- 0-1 km storm-relative helicity
- 10 m²/s²
- 0-3 km storm-relative helicity
- 104 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000 WUUS55 KPSR 022127 SVRPSR CAC065-071-022230- BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE PHOENIX AZ 225 PM PDT TUE SEP 2 2003 THE NATIONAL WEATHER SERVICE IN PHOENIX HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... NORTH CENTRAL RIVERSIDE COUNTY IN SOUTHEAST CALIFORNIA SOUTH CENTRAL SAN BERNARDINO COUNTY IN SOUTHEAST CALIFORNIA * UNTIL 330 PM PDT * THIS STORM WILL AFFECT BLACK ROCK CANYON...KEYS VIEW...HIDDEN VALLEY CAMPGROUND...AND PINTO BASIN ROAD. * AT 225 PM PDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM 10 MILES NORTHWEST OF LOST HORSE-KEYS VIEW JTNP...OR ABOUT 16 MILES NORTHEAST OF CATHEDRAL CITY...MOVING NORTHWEST AT10 MPH. DAMAGING MICROBURST WINDS ARE LIKELY WITH THIS STORM. VERY HEAVY RAIN IS ALSO POSSIBLE. TAKE COVER IN A SUBSTANTIAL SHELTER UNTIL THE STORM PASSES. LARGE HAIL IS POSSIBLE WITH THIS SEVERE THUNDERSTORM. IF YOU ARE IN THE PATH OF THE STORM. INTENSE LIGHTNING IS OCCURRING WITH THIS STORM...MOVE INDOORS IF POSSIBLE. WHEN INDOORS...STAY AWAY FROM WINDOWS AND DOORS. IF OUTDOORS...AVOID ISOLATED TALL OBJECTS SUCH AS TREES. REPORT SEVERE WEATHER TO THE NEAREST LAW ENFORCEMENT AGENCY. THEY WILL RELAY YOUR REPORT TO THE NATIONAL WEATHER SERVICE FORECAST OFFICE IN PHOENIX. LAT...LON 3403 11653 3373 11604 3385 11578 3433 11615 $$
What forecasters said that day
The local office's own words before this severe thunderstorm warning 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 severe thunderstorm warning went out at Sep 2, 8:55 AM PDT, 5 hours 32 minutes earlier.
Area forecast discussion, Sep 2, 8:55 AM PDT, 5 hours 32 minutes before
AZZ020>028-CAZ030>033-022245-
SOUTHWEST ARIZONA/SOUTHEAST CALIFORNIA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE PHOENIX AZ
855 AM MST TUE SEP 2 2003
.SYNOPSIS...
HIGH PRESSURE ALOFT WILL REMAIN NEAR THE UTAH BORDER TODAY AND
WEDNESDAY BEFORE MOVING SOUTHWEST OVER SOUTHERN CALIFORNIA THURSDAY
...AND OFF THE NORTHERN BAJA CALIFORNIA COAST FRIDAY THROUGH EARLY
NEXT WEEK. THIS WILL BRING A DRIER FLOW OF AIR ALOFT FROM THE
PACIFIC WITH A REDUCTION IN THUNDERSTORMS OVER SOUTHEAST CALIFORNIA
AND SOUTHWEST ARIZONA BY THE END OF THE WEEK...AND OVER
SOUTH-CENTRAL ARIZONA BY SUNDAY. TEMPERATURES WILL BE COOLER BY
EARLY NEXT WEEK.
.DISCUSSION...
A HEAT ADVISORY HAS BEEN ISSUED FOR SOUTH-CENTRAL ARIZONA DESERT
ZONES 22...23...27...AND 28...MARICOPA COUNTY INCLUDING THE GREATER
PHOENIX AREA...AND NORTHWEST AND NORTH-CENTRAL PINAL COUNTY TODAY
AND WEDNESDAY.
SAT IMAGERY THIS MORNING SHOWS PARTLY CLOUDY SKIES OVER SE CA...SW
AND S-CNTRL AZ UNDER A SOUTHEAST FLOW ALOFT. LAST NIGHTS CONVECTION
IS WELL NORTH OF THE AREA...NEAR LAS VEGAS THIS MORNING...AND SKIS
SHOULD BEGIN TO CLEAR OVER OUR CWA AS THE DAY WEARS ON. KPSR
SOUNDING INDICATES PWATER IS DOWN FROM 1.76 INCHES YESTERDAY TO 1.48
INCHES TODAY...AND DRYING IS EVIDENT FROM THE SFC TO ABOUT 600 MB.
FURTHERMORE...24 HR CHANGE PRODUCT INDICATES DEW POINTS ARE DOWN 3
TO 10 DEG ACROSS MUCH OF THE AREA. SEEMS THE BEST SUPPORT ALOFT FOR
SHOWERS AND THUNDERSTORMS WILL BE OVER NRN AZ...WITH WEAK SUBSIDENCE
FCST FOR THE CNTRL AND SRN AZ. WILL LIKELY UPDATE FORECAST TO LOWER
POPS FROM 20 TO 10 OVER SW AND S-CNTRL AZ DESERTS...KEEPING SLIGHTLY
HIGHER POPS OVER SRN CA AS A BULLSEYE OF UPPER LEVEL DIVERGENCE
STRETCHES FROM SE CA TO NE AZ FROM 00-06Z. OTHER THAN SOME MINOR
TWEAKING TO THE POPS...NO FURTHER UPDATES ARE NEEDED AT THIS TIME.
BEYOND TODAY...HIGH PRESSURE ALOFT JUST SOUTH OF THE 4 CORNERS
REGION WILL EXTEND NW TO NV TONIGHT AND WED NIGHT. THE HIGH WILL
THEN MOVE SOUTHWEST OVER SRN CA THU...AND OFF THE NRN BAJA CA COAST
FRI THROUGH EARLY NEXT WEEK. THIS WILL BRING A DRIER FLOW OF AIR
ALOFT FROM THE PACIFIC WITH A REDUCTION IN THUNDERSTORMS OVER SE CA
AND SW AZ BY THE END OF THE WEEK...AND OVER S-CNTRL AZ INCLUDING THE
GREATER PHOENIX AREA BY SUN. FURTHERMORE...A LOW PRESSURE SYSTEM
MOVING TOWARD THE WRN US WILL RESULT IN COOLER TEMPS BY EARLY NEXT
WEEK.
.PSR...HEAT ADVISORY FOR SOUTH-CENTRAL ARIZONA DESERT ZONES 23...
22...27...AND 28 MARICOPA COUNTY INCLUDING THE GREATER
PHOENIX AREA...AND NORTHWEST AND NORTH-CENTRAL PINAL COUNTY
TODAY AND WEDNESDAY.Hazardous weather outlook, Sep 2, 6:00 AM PDT, 8 hours 27 minutes before
AZZ020>028-CAZ030>033-030100- HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE PHOENIX AZ 600 AM MST TUE SEP 2 2003 THIS HAZARDOUS WEATHER OUTLOOK IS FOR SOUTHWEST AND SOUTH-CENTRAL ARIZONA...AND SOUTHEAST CALIFORNIA. .DAY ONE...TODAY THE PROBABILITY FOR WIDESPREAD HAZARDOUS WEATHER IS LOW. .DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY THE PROBABILITY FOR WIDESPREAD HAZARDOUS WEATHER IS LOW.
Nearby
Severe Thunderstorm Warnings in California, 2003Every severe thunderstorm warning in 2003
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive.