Alert archive / California / Severe Thunderstorm Warnings in 2001
Severe Thunderstorm Warning 9, NWS Hanford, CA
NWS Hanford, CA issued this severe thunderstorm warning at Sep 25, 2001, 4:10 AM PDT for Madera County, Mariposa County, California. It was in force for 50 min. No storm report in the archive falls inside the area while it was in force.
The area
The outline the Iowa Environmental Mesonet reconstructed for it; the warning itself named whole counties.
The facts
- Issued
- Sep 25, 2001, 4:10 AM PDT (11:10 UTC)
- Expired
- Sep 25, 2001, 5:00 AM PDT
- In force
- 50 min
- Issued by
- NWS Hanford, CA
- Area
- Whole counties; the outline is the Mesonet’s reconstruction
Counties Madera County, CA, Mariposa County, CA
The radar
The San Joaquin Valley radar (KHNX), 140 km from the middle of the area, began a volume at 11:12 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
Oakland, CA (KOAK), launched 00:00Z, 11.2 hours before the alert went out and 228 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 1165 m above ground
- 0-6 km bulk shear
- 55 kt
- 0-1 km storm-relative helicity
- -56 m²/s²
- 0-3 km storm-relative helicity
- 36 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
210 WUUS56 KHNX 251112 SVRFAT CAC039-043-251200- BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE SAN JOAQUIN VALLEY CA 410 AM PDT TUE SEP 25 2001 THE NATIONAL WEATHER SERVICE IN HANFORD CA HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... NORTH CENTRAL MADERA COUNTY IN CENTRAL CALIFORNIA EASTERN MARIPOSA COUNTY IN CENTRAL CALIFORNIA * UNTIL 500 AM PDT * AT 400 AM PDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM 7 MILES SOUTHWEST OF FISH CAMP...OR ABOUT 37 MILES NORTHEAST OF MADERA...MOVING NORTHEAST AT 45 MPH. * THE SEVERE THUNDERSTORM WILL BE NEAR... RURAL EASTERN MARIPOSA COUNTY AT 425 AM PDT REPORT SEVERE WEATHER TO THE NEAREST LAW ENFORCEMENT AGENCY. THEY WILL RELAY YOUR REPORT TO THE NATIONAL WEATHER SERVICE FORECAST OFFICE IN HANFORD CA. LAT...LON 3749 11982 3738 11966 3768 11930 3781 11949 86
What forecasters said that day
The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Hanford, CA wrote its last area forecast discussion before this severe thunderstorm warning went out at Sep 25, 3:30 AM PDT, 40 minutes earlier.
Area forecast discussion, Sep 25, 3:30 AM PDT, 40 minutes before
INTERIOR CENTRAL CALIFORNIA FORECAST DISCUSSION NATIONAL WEATHER SERVICE SAN JOAQUIN VALLEY - HANFORD CA 330 AM PDT TUE SEP 25 2001 THE COMBINATION OF AN EAST PACIFIC TROUGH MOVING ONSHORE AND TROPICAL MOISTURE FROM TROPICAL STORM KIKO HAS RESULTED IN A BAND OF MODERATE TO ISOLATED STRONG THUNDERSTORMS MOVING FROM WESTERN FRESNO COUNTY THROUGH WESTERN MADERA COUNTY INTO MARIPOSA COUNTY AND YOSEMITE NATIONAL PARK. RADAR AND SATELLITE LOOPS SHOW CONVECTIVE ACTIVITY LIFTING TO THE NORTHEAST...WITH THE TAIL END OF THE BAND MOVING INTO FRESNO COUNTY AT THIS TIME. STRONGEST ACTIVITY SHOULD MOVE NORTH OF THE HANFORD WARNING/FORECAST AREA BY SUNRISE...BUT A FEW SHOWERS MAY LINGER OVER THE NORTHERN HALF OF THE REGION THROUGH THE MORNING HOURS. SATELLITE LOOPS SHOW THE UPPER-LEVEL LOW NEAR 39N/125W...WITH A STRONG VORTICITY CENTER AT 37N/126W. THE LOW IS MOVING SLOWER THAN FORECAST BY THE 00Z MODELS...RESULTING IN GUSTY SOUTHERLY WINDS CONTINUING OVER THE HIGHER ELEVATIONS OF THE SOUTHERN SIERRA NEVADA AND TEHACHAPI MOUNTAINS THROUGH TODAY AND INTO THE EVENING. THE LOW IS MOVING THROUGH A BROAD EAST-PACIFIC TROUGH ASSOCIATED WITH A GULF OF ALASKA LOW NEAR 55N/143W. THIS TROUGH IS FORECAST TO REMAIN OFFSHORE THROUGH THURSDAY...ALLOWING A FEW DEGREES OF WARMING OVER THE NEXT COUPLE OF DAYS AS THE UPPER-LEVEL RIDGE OVER THE DESERT SOUTHWEST EXPANDS WESTWARD INTO SOUTHERN CALIFORNIA. WILL SEE SOME COOLING FRIDAY AS THE TROUGH MOVES INTO CALIFORNIA...BOTH SYNOPTIC COOLING AND AT THE LOWER ELEVATIONS...ANOTHER INFLUX OF MARINE AIR AS THE COASTAL MARINE LAYER DEEPENS. THE MRF...UK AND NOGAPS BUILD A SHORT-WAVE TROUGH OVER CALIFORNIA OVER THE WEEKEND AS ANOTHER TROUGH DROPS OUT OF THE GULF OF ALASKA. UNCERTAINTY FOR NEXT WEEK IS MOISTURE FROM HURRICANE JULIETTE... WHICH THE MRF FORECASTS TO MOVE INTO SOUTHERN CALIFORNIA NEXT TUESDAY. THIS IS BEYOND THE CURRENT EXTENDED FORECAST PERIOD...BUT THE DAY CREW MAY WANT TO INTRODUCE SOME CLOUDS OVER MOUNTAINS AND DESERTS FOR DAY 7 WITH THE AFTERNOON PACKAGE. POPS FAT 100 BFL 000 YNP 200. SANGER .HNX...NONE.
Nearby
Severe Thunderstorm Warnings in California, 2001Every severe thunderstorm warning in 2001
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.