Alert archive / California / Winter Storm Watches in 2013
Winter Storm Watch 3, NWS San Diego, CA
NWS San Diego, CA issued this winter storm watch at Nov 20, 2013, 4:21 AM PST for Riverside County, San Bernardino County, California. It took effect at Nov 21, 2013, 10:00 AM PST. It was in force for .
The area
The counties it named.
The facts
- Issued
- Nov 20, 2013, 4:21 AM PST (12:21 UTC)
- In effect from
- Nov 21, 2013, 10:00 AM PST
- Expired
- Nov 20, 2013, 2:11 PM PST
- In force
- Issued by
- NWS San Diego, CA
The radar
The Santa Ana Mts radar (KSOX), 152 km from the middle of the area, began a volume at 12:20 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, 0.4 hours before the alert went out and 195 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
- 8 J/kg
- Mixed-layer CIN
- -1 J/kg
- Mixed-layer LCL
- 531 m above ground
- 0-6 km bulk shear
- 55 kt
- 0-1 km storm-relative helicity
- 27 m²/s²
- 0-3 km storm-relative helicity
- 81 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
What forecasters said that day
The local office's own words before this winter storm 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 winter storm watch went out at Nov 20, 4:00 AM PST, 21 minutes earlier.
Area forecast discussion, Nov 20, 4:00 AM PST, 21 minutes before
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</html>Hazardous weather outlook, Nov 20, 4:00 AM PST, 21 minutes before
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE SAN DIEGO CA 400 AM PST WED NOV 20 2013 CAZ042-043-048-050-055>058-060>062-PZZ750-775-211400- 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- 400 AM PST WED NOV 20 2013 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF EXTREME SOUTHWESTERN CALIFORNIA. .DAY ONE...TODAY AND TONIGHT. AN UPPER LEVEL LOW PRESSURE SYSTEM WILL BRING SHOWERS THIS EVENING AND TONIGHT. .DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY. SHOWERS CONTINUING OVER THE AREA THURSDAY THROUGH FRIDAY...AND POSSIBLY INTO THE WEEKEND...WITH SNOWFALL ABOVE 6000 FEET. THE SHOWERS MAY BE LOCALLY HEAVY AND ISOLATED THUNDERSTORMS MAY DEVELOP FRIDAY. ALSO... MODERATE TO LOCALLY STRONG AND GUSTY NORTHEAST WINDS ARE POSSIBLE FRIDAY INTO SATURDAY ALONG MOUNTAIN RIDGE-TOPS AND THROUGH AND BELOW THE PASSES AND CANYONS. GUSTS COULD REACH 60 MPH OR GREATER IN FAVORED SPOTS. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION WILL NOT BE NEEDED TODAY. SS/JAD
The office that day
Everything else NWS San Diego, CA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Nov 20, 2:11 PM PST | Winter Storm Warning | SGX | Riverside, San Bernardino | 69 hr |
Nearby
Winter Storm Watches in California, 2013Every winter storm watch in 2013
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.