Alert archive / California / Tornado Watches in 2005
Tornado Watch 30
The Storm Prediction Center issued this tornado watch at Feb 22, 2005, 11:10 AM PST for 4 counties in California. It was in force for 7 hr.
The area
The outline as issued.
The facts
- Issued
- Feb 22, 2005, 11:10 AM PST (19:10 UTC)
- Expired
- Feb 22, 2005, 6:00 PM PST
- In force
- 7 hr
- Issued by
- the Storm Prediction Center
Counties Los Angeles County, CA, Orange County, CA, San Diego County, CA, Ventura County, CA
The radar
The Santa Ana Mts radar (KSOX), 22 km from the middle of the area, began a volume at 19:11 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.
Warnings issued inside it
3 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Feb 22, 2:22 PM PST | Flash Flood Warning | SGX | Orange, Riverside, San Bernardino, San Diego | 3 hr |
| Feb 22, 2:48 PM PST | Tornado Warning | SGX | Orange, San Diego | 60 min |
| Feb 22, 5:30 PM PST | Flash Flood Warning | SGX | Orange, Riverside, San Bernardino, San Diego | 2 hr |
Discussions around it
SPC mesoscale discussions over the same counties from four hours before the watch to its end.
The nearest sounding before it
San Diego, CA (KNKX), launched 12:00Z, 7.2 hours before the alert went out and 126 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
- 299 J/kg
- Mixed-layer CIN
- -5 J/kg
- Mixed-layer LCL
- 584 m above ground
- 0-6 km bulk shear
- 44 kt
- 0-1 km storm-relative helicity
- 62 m²/s²
- 0-3 km storm-relative helicity
- 50 m²/s²
- Significant tornado parameter
- 0.1
- Supercell composite
- 0.5
The text
As transmitted, in the capitals the NWS used until 2016.
000
WWUS20 KWNS 221910
SEL0
SPC WW 221910
CAZ000-CWZ000-230200-
URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 30
NWS STORM PREDICTION CENTER NORMAN OK
1110 AM PST TUE FEB 22 2005
THE NWS STORM PREDICTION CENTER HAS ISSUED A
TORNADO WATCH FOR PORTIONS OF
SOUTHWESTERN CALIFORNIA
COASTAL WATERS
EFFECTIVE THIS TUESDAY MORNING AND EVENING FROM 1110 AM UNTIL 600
PM PST.
TORNADOES...HAIL TO 1 INCH IN DIAMETER...THUNDERSTORM WIND GUSTS
TO 70 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS.
THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 60 STATUTE MILES
EAST AND WEST OF A LINE FROM 35 MILES NORTHEAST OF OXNARD
CALIFORNIA TO 10 MILES SOUTHEAST OF SAN DIEGO CALIFORNIA. FOR A
COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE
UPDATE (WOUS64 KWNS WOU0).
REMEMBER...A TORNADO WATCH MEANS CONDITIONS ARE FAVORABLE FOR
TORNADOES AND SEVERE THUNDERSTORMS IN AND CLOSE TO THE WATCH AREA.
PERSONS IN THESE AREAS SHOULD BE ON THE LOOKOUT FOR THREATENING
WEATHER CONDITIONS AND LISTEN FOR LATER STATEMENTS AND POSSIBLE
WARNINGS.
DISCUSSION...AS STRONG SURFACE/UPPER LOW APPROACHES SRN CA...SHEAR
AND THERMODYNAMIC PARAMETERS EXPECTED TO BE FAVORABLE FOR
DEVELOPMENT OF MINI-SUPERCELLS THRU THE AFTERNOON.
WATERSPOUT/TORNADOES WILL BE POSSIBLE WITH ANY SUPERCELL ALONG WITH
BRIEF DAMAGING WINDS AND HAIL.
BAND OF ORGANIZED CONVECTION ASSOCIATED WITH VORT MAX WILL MOVE
ONSHORE LATER THIS AFTERNOON MAINTAINING A SEVERE THREAT.
AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL
SURFACE AND ALOFT TO 1 INCH. EXTREME TURBULENCE AND SURFACE WIND
GUSTS TO 60 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 350.
MEAN STORM MOTION VECTOR 19030.
...HALES
343,1174 323,1160 323,1180 343,1194SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Feb 21, 9:29 PM PST | Mesoscale Discussion | SPC | Los Angeles, Orange, San Diego, Ventura | 61 min |
| Feb 22, 10:12 AM PST | Mesoscale Discussion | SPC | Los Angeles, Orange, San Diego, Ventura | 2 hr |
| Feb 22, 10:55 AM PST | Mesoscale Discussion | SPC | Riverside | 2 hr |
| Feb 22, 1:20 PM PST | Mesoscale Discussion | SPC | Los Angeles, Orange, San Diego, Ventura | 115 min |
Nearby
Tornado Watches in California, 2005Every tornado watch in 2005
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.