Alert archive / California / Fire Weather Watches in 2011

Fire Weather Watch 2, NWS San Diego, CA

November 29, 20114 counties in California

NWS San Diego, CA issued this fire weather watch at Nov 29, 2011, 1:35 PM PST for 4 counties in California. It took effect at Nov 30, 2011, 10:00 PM PST. It was in force for .

The area

The counties it named.

The facts

Issued
Nov 29, 2011, 1:35 PM PST (21:35 UTC)
In effect from
Nov 30, 2011, 10:00 PM PST
Expired
Nov 30, 2011, 1:30 PM PST
In force
Issued by
NWS San Diego, CA

Counties Orange County, CA, Riverside County, CA, San Bernardino County, CA, San Diego County, CA

The radar

The Santa Ana Mts radar (KSOX), 88 km from the middle of the area, began a volume at 21:38 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 12:00Z, 9.6 hours before the alert went out and 124 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 2011-11-29Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 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 2011-11-29The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 56 square meters per square second.193958Sfc1 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
4651 m above ground
0-6 km bulk shear
28 kt
0-1 km storm-relative helicity
56 m²/s²
0-3 km storm-relative helicity
46 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this fire weather watch 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 fire weather watch went out at Nov 29, 9:35 AM PST, 4 hours earlier.

Area forecast discussion, Nov 29, 9:35 AM PST, 4 hours before
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Hazardous weather outlook, Nov 29, 3:13 AM PST, 10 hours 22 minutes before
HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE SAN DIEGO CA
313 AM PST TUE NOV 29 2011

CAZ042-043-048-050-055>058-060>062-PZZ750-775-301115-
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-
313 AM PST TUE NOV 29 2011

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

.DAY ONE...TODAY AND TONIGHT.

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

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

THURSDAY THROUGH SATURDAY...A COLD STORM SYSTEM WILL MOVE INTO THE
REGION FROM THE NORTH WITH GUSTY NORTHEAST WINDS...SHOWERS...AND
RAPIDLY LOWERING SNOW LEVELS. PRECIPITATION COULD BEGIN AS EARLY
AS THURSDAY MORNING. NO HEAVY AMOUNTS OF RAINFALL ARE
EXPECTED...BUT ISOLATED THUNDERSTORMS WILL BE POSSIBLE. SNOWFALL
MAY ACCUMULATE ABOVE 4000 FEET IN THE MOUNTAINS AND ADJACENT HIGH
DESERT SLOPES BY SATURDAY MORNING...POSSIBLY MAKING TRAVEL
DIFFICULT IN SOME AREAS.

.SPOTTER INFORMATION STATEMENT...
SPOTTER ACTIVATION WILL NOT BE NEEDED TODAY.

In the hours before

Special weather statement, Nov 29, 10:05 AM PST, 3 hours 30 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE SAN DIEGO CA
1005 AM PST TUE NOV 29 2011

CAZ042-043-048-050-055>058-060>062-301400-
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-
1005 AM PST TUE NOV 29 2011

...VERY STRONG AND GUSTY WINDS...COLDER TEMPERATURES...AND THE
POTENTIAL FOR UNSETTLED WEATHER RETURNING WEDNESDAY NIGHT THROUGH
FRIDAY...

A VERY STRONG AND UNSEASONABLY COLD TROUGH OF LOW PRESSURE WILL
DIG OVER THE GREAT BASIN AND LOWER COLORADO RIVER BASIN WEDNESDAY
INTO THURSDAY...BRINGING SIGNIFICANTLY COLDER WEATHER TO THE
REGION AS WELL AS VERY STRONG AND GUSTY WINDS. THERE IS EVEN THE
POTENTIAL FOR SOME SHOWERS AND THUNDERSTORMS TO DEVELOP ON
THURSDAY AND FRIDAY...WITH SNOW LEVELS POSSIBLY FALLING INTO THE
FOOTHILLS WITH SOME OF THE STRONGER SHOWERS.

WINDS...
STRONG AND GUSTY NORTH TO NORTHEAST WINDS WILL DEVELOP WEDNESDAY
EVENING AND CONTINUE THROUGH FRIDAY...AS STRONG OFFSHORE FLOW
DEVELOPS AROUND THE NORTHWEST SIDE OF THE SYSTEM. STRONGEST WINDS
WILL MOST LIKELY BE IN ORANGE COUNTY...THE INLAND EMPIRE AND
THE SAN BERNARDINO COUNTY MOUNTAINS...WHERE WIND GUSTS COULD
EXCEED 70 MPH AT TIMES...ESPECIALLY THROUGH AND BELOW PASSES AND
CANYONS. STRONG WINDS ARE ALSO LIKELY IN THE APPLE AND LUCERNE
VALLEYS. DUE TO THE UNCERTAINTY OF THE POSITION OF THE UPPER
LOW...STRONG WINDS ARE LESS CERTAIN IN SAN DIEGO COUNTY...BUT ARE
STILL POSSIBLE. STRONGEST WINDS ARE EXPECTED LATE WEDNESDAY NIGHT
AND THURSDAY...WHEN DAMAGE TO TREES AND POWER LINES MAY OCCUR.
TRAVEL WILL BE DIFFICULT...ESPECIALLY FOR HIGH PROFILE VEHICLES.

TEMPERATURES...
MUCH COLDER AIR WILL FILTER INTO SOUTHERN CALIFORNIA ON
THURSDAY...ESPECIALLY IN THE MOUNTAINS AND HIGH DESERTS. HIGHS
WILL MOSTLY BE IN THE 30S AND 40S IN THE MOUNTAINS...WHICH WILL BE
15 TO 20 DEGREES BELOW NORMAL. IN THE APPLE AND LUCERNE
VALLEYS...HIGHS WILL STRUGGLE TO REACH 50. WIND CHILL READINGS
MAY ALSO BE IN THE TEENS IN COLDEST PARTS OF THE SAN BERNARDINO
MOUNTAINS THURSDAY. MOST VALLEY AND COASTAL AREAS WILL STRUGGLE TO
WARM INTO THE LOWER TO MID 60S. LITTLE OR NO WARMING IS EXPECTED
FRIDAY...THOUGH WIND SPEEDS WILL DECREASE SOMEWHAT.

SHOWERS AND THUNDERSTORMS...
THERE IS A SMALL CHANCE OF SHOWERS AND THUNDERSTORMS THURSDAY
THROUGH FRIDAY...ESPECIALLY OVER HIGHER TERRAIN. PRECIPITATION
AMOUNTS ARE STILL HIGHLY UNCERTAIN...AND WILL DEPEND ON THE TRACK
OF THE UPPER LOW...WITH MOST AREAS SEEING LIGHT AMOUNTS. SNOW
LEVELS WILL LIKELY BE LOW...FALLING TO 3500 TO 4000 FEET.
HOWEVER...LOCALLY LOWER SNOW LEVELS WILL BE POSSIBLE ON THE NORTH
SLOPES OF THE SAN BERNARDINO MOUNTAINS...AND WITH THE HEAVIER
SHOWERS. A FEW INCHES OF SNOW COULD FALL IN THE MOUNTAINS.

OUTLOOK...
THE PRECIPITATION WILL END BY FRIDAY NIGHT. HOWEVER...OFFSHORE
FLOW WILL CONTINUE TO BRING LOCALLY GUSTY WINDS THROUGH THE
WEEKEND...BUT AT LOWER SPEEDS THAN ON THURSDAY AND FRIDAY.

PEOPLE WITH OUTDOOR INTERESTS SHOULD MAINLY BE PREPARED FOR THE
STRONG GUSTY WINDS AND COLDER WEATHER WEDNESDAY NIGHT THROUGH FRIDAY.
STAY TUNED TO NOAA WEATHER RADIO...THE NATIONAL WEATHER SERVICE
WEBSITE AT WEATHER.GOV/SANDIEGO...OR LOCAL MEDIA FOR UPDATES.

PALMER

The office that day

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

IssuedProductOfficeCountiesLasted
Nov 29, 2:00 PM PSTHigh Wind WatchSGXRiverside, San Bernardino, San Diego8 hr
Nov 29, 2:00 PM PSTHigh Wind WarningSGXOrange, Riverside, San Bernardino, San Diego61 hr

Nearby

Fire Weather Watches in California, 2011Every fire weather watch 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.