Alert archive / California / Special Weather Statements in 2011

Special Weather Statement, NWS San Diego, CA

March 21, 2011Orange County, California

NWS San Diego, CA issued this special weather statement at Mar 21, 2011, 4:46 AM PDT for Orange County, California. It was in force for 59 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: Mar 21, 2011, 4:46 AM PDT (11:46 UTC)
Expired: Mar 21, 2011, 5:45 AM PDT
In force: 59 min
Issued by: NWS San Diego, CA

County Orange County, CA

The radar

The Santa Ana Mts radar (KSOX), 17 km from the middle of the area, began a volume at 11:46 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 nearest sounding before it

San Diego, CA (KNKX), launched 00:00Z, 11.8 hours before the alert went out and 137 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 1157 m above ground
0-6 km bulk shear: 81 kt
0-1 km storm-relative helicity: 258 m²/s²
0-3 km storm-relative helicity: 366 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 Mar 21, 4:15 AM PDT, 31 minutes earlier.

Area forecast discussion, Mar 21, 4:15 AM PDT, 31 minutes before

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Hazardous weather outlook, Mar 20, 5:45 AM PDT, 23 hours 1 minute before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE SAN DIEGO CA
545 AM PDT SUN MAR 20 2011

CAZ042-043-048-050-055>058-060>062-PZZ750-PZZ775-201300-
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-
545 AM PDT SUN MAR 20 2011

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

.DAY ONE...TODAY AND TONIGHT.

A STRONG PACIFIC STORM WILL BRING HEAVY RAINFALL WITH THE POTENTIAL
FOR FLASH FLOODING...HEAVY MOUNTAIN SNOWFALL ABOVE 6000 FEET...AND
STRONG GUSTY WINDS. THE STRONGEST PART OF THE STORM IS EXPECTED LATE
THIS AFTERNOON THROUGH LATE TONIGHT.

.DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY.

SCATTERED SHOWERS AND ISOLATED THUNDERSTORMS WILL LINGER FOR EARLY
MONDAY.

.SPOTTER INFORMATION STATEMENT...SKYWARN SPOTTER ACTIVATION IS
REQUESTED FOR THIS AFTERNOON THROUGH LATE TONIGHT.

MARTIN

In the hours before

Local storm report, Mar 20, 11:54 PM PDT, 4 hours 52 minutes before

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Local storm report, Mar 21, 12:04 AM PDT, 4 hours 42 minutes before

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Local storm report, Mar 21, 1:24 AM PDT, 3 hours 22 minutes before

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Local storm report, Mar 21, 4:35 AM PDT, 11 minutes before

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Special weather statement, Mar 21, 4:46 AM 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
Mar 20, 5:46 PM PDT	Special Marine Warning	SGX		59 min
Mar 20, 6:44 PM PDT	Special Marine Warning	SGX		61 min
Mar 20, 7:13 PM PDT	Severe Thunderstorm Warning	SGX	Orange	47 min
Mar 20, 7:38 PM PDT	Coastal Flood Advisory	SGX	San Diego	4 hr
Mar 20, 7:47 PM PDT	Special Marine Warning	SGX		43 min
Mar 20, 8:15 PM PDT	Special Weather Statement	SGX	San Diego	45 min
Mar 20, 8:31 PM PDT	Special Marine Warning	SGX		44 min
Mar 20, 9:10 PM PDT	Special Weather Statement	SGX	San Diego	50 min
Mar 20, 9:25 PM PDT	Small Craft Advisory	SGX		7 hr
Mar 20, 9:57 PM PDT	Areal Flood Advisory	SGX	Orange, Riverside, San Bernardino, San Diego	5 hr
Mar 20, 10:34 PM PDT	Areal Flood Advisory	SGX	Riverside, San Bernardino, San Diego	5 hr
Mar 21, 2:59 AM PDT	Winter Weather Advisory	SGX	Riverside, San Bernardino, San Diego	15 hr
Mar 21, 4:53 AM PDT	Small Craft Advisory for Hazardous Seas	SGX		6 hr
Mar 21, 10:58 AM PDT	Special Weather Statement	SGX	Orange	47 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; radar from the NEXRAD Level II archive.