Alert archive / California / Special Weather Statements in 2011

Special Weather Statement, NWS San Diego, CA

July 5, 2011

NWS San Diego, CA issued this special weather statement at Jul 5, 2011, 2:36 PM PDT. It was in force for 54 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: Jul 5, 2011, 2:36 PM PDT (21:36 UTC)
Expired: Jul 5, 2011, 3:30 PM PDT
In force: 54 min
Issued by: NWS San Diego, CA

The nearest sounding before it

San Diego, CA (KNKX), launched 12:00Z, 9.6 hours before the alert went out and 194 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 3 J/kg
Mixed-layer CIN: -617 J/kg
Mixed-layer LCL: 969 m above ground
0-6 km bulk shear: 19 kt
0-1 km storm-relative helicity: 40 m²/s²
0-3 km storm-relative helicity: 13 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.

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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 San Diego, CA wrote its last area forecast discussion before this special weather statement went out at Jul 5, 2:00 PM PDT, 36 minutes earlier.

Area forecast discussion, Jul 5, 2:00 PM PDT, 36 minutes before

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Hazardous weather outlook, Jul 5, 3:50 AM PDT, 10 hours 46 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE SAN DIEGO CA
350 AM PDT TUE JUL 5 2011

CAZ042-043-048-050-055>058-060>062-PZZ750-775-052300-
ORANGE COUNTY COASTAL AREAS-SAN DIEGO COUNTY COASTAL AREAS-
SAN BERNARDINO AND RIVERSIDE COUNTY VALLEYS-THE INLAND EMPIRE-
SAN DIEGO COUNTY VALLEYS-SAN BERNARDINO COUNTY MOUNTAINS-
RIVERSIDE COUNTY MOUNTAINS-SANTA ANA MOUNTAINS AND FOOTHILLS-
SAN DIEGO COUNTY MOUNTAINS-APPLE AND LUCERNE VALLEYS-
COACHELLA VALLEY-SAN DIEGO COUNTY DESERTS-
COASTAL WATERS FROM SAN MATEO POINT TO THE MEXICAN BORDER AND OUT
30 NM-
WATERS FROM SAN MATEO POINT TO THE MEXICAN BORDER EXTENDING 30 TO
60 NM OUT INCLUDING SAN CLEMENTE ISLAND-
350 AM PDT TUE JUL 5 2011

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF EXTREME
SOUTHWESTERN CALIFORNIA.

.DAY ONE...TODAY AND TONIGHT

ISOLATED TO SCATTERED THUNDERSTORMS ARE POSSIBLE TODAY...MAINLY
OVER THE MOUNTAINS AND DESERTS. THESE THUNDERSTORMS ARE CAPABLE OF
PRODUCING BRIEF HEAVY RAIN...HAIL...GUSTY WINDS...AND DANGEROUS
LIGHTNING. THE FLASH FLOOD POTENTIAL INDEX IS MODERATE...ISOLATED
FLASH FLOODING MAY BE POSSIBLE.

.DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY

FOR WEDNESDAY AND THURSDAY...A SLIGHT CHANCE OF THUNDERSTORMS
CONTINUES OVER THE MOUNTAINS AND DESERTS...MAINLY IN THE
AFTERNOONS AND EVENINGS. THESE THUNDERSTORMS ARE CAPABLE OF
PRODUCING BRIEF HEAVY RAIN...HAIL...GUSTY WINDS...AND DANGEROUS
LIGHTNING. THE FLASH FLOOD POTENTIAL INDEX IS LOW...AND THE RISK
OF FLASH FLOODING IS MINIMAL.

.SPOTTER INFORMATION STATEMENT...
SKYWARN WEATHER ACTIVATION IS NOT REQUESTED FOR THIS AREA...
HOWEVER WEATHER SPOTTERS ARE ENCOURAGED TO REPORT SIGNIFICANT
WEATHER CONDITIONS.

SS

In the hours before

Special weather statement, Jul 5, 2:36 PM PDT, 0 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 4, 6:58 PM PDT	Flash Flood Warning	SGX	San Bernardino	75 min
Jul 5, 2:21 PM PDT	Areal Flood Advisory	SGX	San Bernardino	3 hr
Jul 5, 3:11 PM PDT	Special Weather Statement	SGX		64 min
Jul 5, 4:31 PM PDT	Special Weather Statement	SGX		59 min

Nearby

Special Weather Statements in California, 2011 Every special weather statement in 2011

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.