Alert archive / California / Severe Thunderstorm Warnings in 2007

Severe Thunderstorm Warning 13, NWS San Diego, CA

September 2, 2007Riverside County, California

NWS San Diego, CA issued this severe thunderstorm warning at Sep 2, 2007, 1:49 PM PDT for Riverside County, California. It was in force for 56 min. 1 report came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued
Sep 2, 2007, 1:49 PM PDT (20:49 UTC)
Expired
Sep 2, 2007, 2:45 PM PDT
In force
56 min
Issued by
NWS San Diego, CA
Area
Counties, with a storm outline in the text

County Riverside County, CA

What was reported inside it

TimeReportWhereRemark
Sep 2, 2:08 PM PDTTSTM WND DMGNuevo, CAPOWER POLE DOWN IN THE ROADWAY.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

San Diego, CA (KNKX), launched 12:00Z, 8.8 hours before the alert went out and 100 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.

Skew-T log-pSkew-T log-p diagram, San Diego, CA at 12:00Z on 2007-09-02Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 718 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, San Diego, CA at 12:00Z on 2007-09-02The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 0 square meters per square second.1939Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
718 J/kg
Mixed-layer CIN
-432 J/kg
Mixed-layer LCL
1961 m above ground
0-6 km bulk shear
7 kt
0-1 km storm-relative helicity
0 m²/s²
0-3 km storm-relative helicity
27 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

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

000 
WUUS56 KSGX 022051
SVRSGX
CAC065-022145-
/O.NEW.KSGX.SV.W.0013.070902T2049Z-070902T2145Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE SAN DIEGO CA
149 PM PDT SUN SEP 2 2007

THE NATIONAL WEATHER SERVICE IN SAN DIEGO HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTHWESTERN RIVERSIDE COUNTY IN SOUTHWEST CALIFORNIA...  THIS 
INCLUDES THE CITIES OF...WILDOMAR...PERRIS...NUEVO...

* UNTIL 245 PM PDT

* AT 144 PM PDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING DAMAGING WINDS IN
  EXCESS OF 60 MPH.  THESE STORMS WERE LOCATED ALONG A LINE EXTENDING
  FROM 7 MILES NORTHWEST OF SAN JACINTO TO 8 MILES SOUTH OF LAKE
  ELSINORE...OR ALONG A LINE EXTENDING FROM 9 MILES NORTHWEST OF
  HEMET TO 14 MILES WEST OF TEMECULA...AND MOVING WEST AT 10 MPH.

* OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
  MURRIETA

LAT...LON 3383 11686 3346 11710 3349 11726 3353 11748
      3366 11739 3378 11754 3399 11727
TIME...MOT...LOC 2049Z 278DEG 11KT 3385 11705 3355 11734

$$

SCV
2 follow-up statements
000 
WWUS56 KSGX 022132
SVSSGX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE SAN DIEGO CA
232 PM PDT SUN SEP 2 2007

CAC065-022145-
/O.CON.KSGX.SV.W.0013.000000T0000Z-070902T2145Z/
RIVERSIDE CA-
232 PM PDT SUN SEP 2 2007

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 245 PM PDT
FOR SOUTHWESTERN RIVERSIDE COUNTY...

AT 227 PM PDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING DAMAGING
WINDS IN EXCESS OF 60 MPH.  THESE STORMS WERE LOCATED ALONG A LINE
EXTENDING FROM SAN JACINTO TO MURRIETA...OR ALONG A LINE EXTENDING
FROM 9 MILES NORTHEAST OF HEMET TO TEMECULA...MOVING WEST AT 10 MPH.


LAT...LON 3346 11710 3353 11748 3357 11746 3357 11744
      3365 11740 3366 11740 3378 11754 3399 11727
      3383 11686
TIME...MOT...LOC 2132Z 278DEG 11KT 3383 11689 3353 11718

$$

SCV
000 
WWUS56 KSGX 022144
SVSSGX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE SAN DIEGO CA
244 PM PDT SUN SEP 2 2007

CAC065-022154-
/O.EXP.KSGX.SV.W.0013.000000T0000Z-070902T2145Z/
RIVERSIDE CA-
244 PM PDT SUN SEP 2 2007

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHWESTERN RIVERSIDE COUNTY
EXPIRES AT 245 PM PDT...

LAT...LON 3346 11710 3353 11748 3357 11746 3357 11744
      3365 11740 3366 11740 3378 11754 3399 11727
      3383 11686
TIME...MOT...LOC 2144Z 278DEG 11KT 3382 11685 3352 11714

$$

SCV

The office that day

Everything else NWS San Diego, CA issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Sep 1, 5:49 PM PDTFlash Flood WatchSGXOrange, Riverside, San Bernardino, San Diego25 hr
Sep 2, 3:17 AM PDTExcessive Heat WarningSGXRiverside, San Bernardino, San Diego40 hr
Sep 2, 12:26 PM PDTFlash Flood WarningSGXSan Bernardino64 min
Sep 2, 1:18 PM PDTFlash Flood WarningSGXSan Bernardino72 min
Sep 2, 2:17 PM PDTSevere Thunderstorm WarningSGXSan Diego28 min
Sep 2, 2:23 PM PDTFlash Flood WarningSGXSan Bernardino3 hr
Sep 2, 2:25 PM PDTSevere Thunderstorm WarningSGXOrange, Riverside45 min
Sep 2, 3:44 PM PDTSevere Thunderstorm WarningSGXRiverside, San Diego61 min

Nearby

Severe Thunderstorm Warnings in California, 2007Every severe thunderstorm warning in 2007

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive.