Alert archive / California / Tornado Warnings in 2005
Tornado Warning 8, NWS Sacramento, CA
NWS Sacramento, CA issued this tornado warning at Apr 8, 2005, 3:40 PM PDT for Butte County, California. It was in force for 38 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
- Apr 8, 2005, 3:40 PM PDT (22:40 UTC)
- Expired
- Apr 8, 2005, 4:18 PM PDT
- In force
- 38 min
- Issued by
- NWS Sacramento, CA
- Area
- Counties, with a storm outline in the text
County Butte County, CA
The radar
The Beale AFB radar (KBBX), 22 km from the middle of the area, began a volume at 22:43 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.
Did it verify
Not verified. The Iowa Environmental Mesonet's Cow found no qualifying storm report inside this tornado warning while it was in force. That is not proof nothing happened: reports are thin where few people live.
Cow counts a report within 15 km of the polygon while the warning was in force: a tornado for a tornado warning; hail of 1 inch or more, a gust of 58 mph or more or wind damage for a severe thunderstorm warning; a flash flood report for a flash flood warning.
The nearest sounding before it
Oakland, CA (KOAK), launched 12:00Z, 10.7 hours before the alert went out and 218 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
- 18 J/kg
- Mixed-layer CIN
- -1 J/kg
- Mixed-layer LCL
- 886 m above ground
- 0-6 km bulk shear
- 58 kt
- 0-1 km storm-relative helicity
- 71 m²/s²
- 0-3 km storm-relative helicity
- 167 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000 WFUS56 KSTO 082241 TORSTO CAC007-082315- /O.NEW.KSTO.TO.W.0008.050408T2240Z-050408T2315Z/ BULLETIN - EAS ACTIVATION REQUESTED TORNADO WARNING NATIONAL WEATHER SERVICE SACRAMENTO CA 340 PM PDT FRI APR 8 2005 THE NATIONAL WEATHER SERVICE IN SACRAMENTO HAS ISSUED A * TORNADO WARNING FOR... CENTRAL BUTTE COUNTY IN CALIFORNIA * UNTIL 415 PM PDT * AT 338 PM PDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO NEAR DURHAM...OR ABOUT 8 MILES SOUTH OF CHICO...MOVING EAST AT 20 MPH. * THE TORNADO WILL OTHERWISE REMAIN OVER MAINLY RURAL AREAS OF THE INDICATED COUNTY. IN ADDITION TO THE TORNADO...THIS STORM IS CAPABLE OF PRODUCING DIME SIZE HAIL AND DESTRUCTIVE STRAIGHT LINE WINDS. THIS TORNADO WARNING REPLACES THE SEVERE THUNDERSTORM WARNING THAT WAS IN EFFECT FOR CENTRAL BUTTE COUNTY. LAT...LON 3973 12193 3956 12192 3953 12154 3975 12155 $$ JJ
2 follow-up statements
000 WWUS56 KSTO 082303 SVSSTO SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE SACRAMENTO CA 402 PM PDT FRI APR 8 2005 CAC007-082315- /O.CON.KSTO.TO.W.0008.000000T0000Z-050408T2315Z/ BUTTE CA- 402 PM PDT FRI APR 8 2005 ...A TORNADO WARNING CONTINUES UNTIL 415 PM PDT FOR CENTRAL BUTTE COUNTY... AT 345 PM PDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO INDICATE A POSSIBLE TORNADO. THIS STORM WAS LOCATED NEAR DURHAM...OR ABOUT 9 MILES SOUTH OF CHICO...MOVING EAST AT 10 MPH. LAT...LON 3973 12193 3956 12192 3953 12154 3975 12155 $$ JJ
000 WWUS56 KSTO 082318 SVSSTO SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE SACRAMENTO CA 416 PM PDT FRI APR 8 2005 CAC007-082326- /O.EXP.KSTO.TO.W.0008.000000T0000Z-050408T2315Z/ BUTTE CA- 416 PM PDT FRI APR 8 2005 ...THE TORNADO WARNING FOR CENTRAL BUTTE COUNTY EXPIRES AT 415 PM PDT... STRONG THUNDERSTORMS CONTINUE TO TRACK ACROSS CENTRAL BUTTE COUNTY...HOWEVER THESE STORMS NO LONGER APPEAR TORNADIC. AS A RESULT...THE TORNADO WARNING HAS BEEN ALLOWED TO EXPIRE. RESIDENTS OF CENTRAL BUTTE COUNTY CAN STILL EXPECT SMALL HAIL AND TORRENTIAL RAINS FROM THESE STORMS. LAT...LON 3973 12193 3956 12192 3953 12154 3975 12155 $$ JJ
What forecasters said that day
The local office's own words before this tornado warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Sacramento, CA wrote its last area forecast discussion before this tornado warning went out at Apr 8, 3:00 PM PDT, 40 minutes earlier.
Area forecast discussion, Apr 8, 3:00 PM PDT, 40 minutes before
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SACRAMENTO CA
300 PM PDT THU APR 8 2005
.DISCUSSION... QUITE OF BIT OF DEEP & MOIST CONVECTIVE ACTIVITY
OCCURRING ACROSS THE COUNTY WARNING AREA OF RESPONSIBILITY THIS
AFTERNOON. MULTIPLE SEVERE THUNDERSTORM WARNINGS...WITH EVEN 3
TORNADO WARNINGS ISSUED ALREADY. STEEP PRESSURE GRADIENTS WHICH
WERE RESULTING IN ADVISORY CRITERIA SOUTH GUSTS ACROSS NORTHERN
SACRAMENTO VALLEY HAS RELAXED ENOUGH TO ALLOW IT TO EXPIRE. THE
SNOWFALL RATES ARE DECREASING AS THE FRONT MOVES THROUGH ... SO
SNOW ADVISORY THAT WAS ISSUED FOR OF OUR ALL MOUNTAINS WILL NOT
LIKELY BE EXTENDED BEYOND 6 PM. FOR THIS REASON, ADVICE WAS TO
NOT INCLUDE THE HEADLINE FOR THOSE ZONES...AS IT WILL LIKELY BE
EXPIRED BY THE TIME THE ZONES ARE VALID. THUNDERSTORM ACTIVITY
WILL WIND UP ACROSS THE LOWER ELEVATIONS THIS EVENING...LEAVING
BEHIND MAINLY SCATTERED SHOWERS. SNOW LEVEL, WHICH WAS REPORTED
TO BE QUITE LOW EARLIER, IS STARTING TO RISE...BUT STILL FAIRLY
LOW FOR THIS TIME OF YEAR. A RIDGE OF HIGH PRESSURE IS BUILDING
ACROSS THE EASTERN PACIFIC IN THE WAKE OF THIS SYSTEM, SO OTHER
THAN SOME ISOLATED MORNING SHOWERS, THE WEEKEND LOOKS TO BE DRY
AND WARMER. THE NEXT SYSTEM MAY BRUSH OUR NORTHERN BORDERS FOR
LATE SUNDAY NIGHT THROUGH MONDAY, BUT THE FIRST REAL CHANCE FOR
ADDITIONAL PRECIPITATION WONT BE UNTIL TUESDAY. THAT WILL DROP
TOWARD THE GREAT BASIN, SO THE REST OF NEXT WEEK LOOKS DRY. RCH
&&
.STO WATCHES/WARNINGS/ADVISORIES... SNOW ADVISORY TO 6PM SHASTA
COUNTY AND NORTHERN LAKE COUNTY MOUNTAINS
...LASSEN AREA INCLUDING BURNEY BASIN...AND
WEST SLOPES OF THE NORTHERN SIERRA NEVADA.
&&Hazardous weather outlook, Apr 8, 7:00 AM PDT, 8 hours 40 minutes before
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE SACRAMENTO CA 7 AM PDT FRI APR 8 2005 CAZ013>019-063-064-066>069-081400- SHASTA LAKE AREA/NORTHERN SHASTA COUNTY- BURNEY BASIN/EASTERN SHASTA COUNTY-NORTHERN SACRAMENTO VALLEY- CENTRAL SACRAMENTO VALLEY-SOUTHERN SACRAMENTO VALLEY- CARQUINEZ STRAIT AND DELTA-NORTHERN SAN JOAQUIN VALLEY- MOUNTAINS SOUTHWESTERN SHASTA TO NORTHERN LAKE COUNTIES- CLEAR LAKE/SOUTHERN LAKE COUNTY-MOTHERLODE- EAST FOOTHILLS/NORTH SACRAMENTO VALLEY- WESTERN PLUMAS COUNTY/LASSEN PARK-WEST SLOPE NORTHERN SIERRA NEVADA- 7 AM PDT FRI APR 8 2005 THIS HAZARDOUS WEATHER OUTLOOK IS FOR INTERIOR NORTHERN CALIFORNIA. .DAY ONE...TODAY A FEW ISOLATED THUNDERSTORMS MAY DEVELOP THROUGH THIS EVENING OVER A LARGE PORTION OF THE INTERIOR NORTHERN CALIFORNIA. THE STRONGEST THUNDERSTORMS WILL LIKELY PRODUCE STRONG WINDS...HEAVY RAINS AND HAIL. ATMOSPHERIC CONDITIONS ALSO SUPPORT THE SLIGHT CHANCE THAT ONE OF THESE THUNDERSTORMS MAY PRODUCE A FUNNEL CLOUD OR TORNADO. PERIODS OF HEAVY SNOW MAY PRODUCE WILL PRODUCE SOME LOCALLY HAZARDOUS DRIVING CONDITIONS. UP TO 7 INCHES OF SNOW MAY FALL OVER THE NORTHERN INTERIOR COASTAL RANGE AND THE MOUNTAINS OF WESTERN SHASTA COUNTY. REFER TO THE ZONE FORECAST (FPUS56 KSTO - ZFPSTO) FOR MORE INFORMATION. .DAYS TWO THROUGH SEVEN... NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .SPOTTER INFORMATION STATEMENT... WEATHER SPOTTERS ARE ENCOURAGED TO REPORT SIGNIFICANT WEATHER CONDITIONS TO THEIR LOCAL NATIONAL WEATHER SERVICE OFFICE. THE LATEST WEATHER INFORMATION IS AVAILABLE ON THE INTERNET AT (LOWER CASE): HTTP://WWW.WRH.NOAA.GOV/STO LAM
In the hours before
Local storm report, Apr 8, 1:49 PM PDT, 1 hour 51 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SACRAMENTO CA
149 PM PDT FRI APR 08 2005
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0140 PM FUNNEL CLOUD 3 W HAMILTON CITY 39.74N 122.07W
04/08/2005 GLENN CA LAW ENFORCEMENT
GLENN COUNTY SHERIFF REPORTS FUNNEL CLOUD ALONG HIGHWAY
32 3 MILES WEST OF HAMILTON CITY.
&&The office that day
Everything else NWS Sacramento, CA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 8, 1:15 PM PDT | Tornado Warning | STO | Butte, Glenn | 30 min |
| Apr 8, 1:44 PM PDT | Tornado Warning | STO | Butte, Glenn | 31 min |
| Apr 8, 2:15 PM PDT | Severe Thunderstorm Warning | STO | Butte, Glenn | 31 min |
| Apr 8, 2:40 PM PDT | Severe Thunderstorm Warning | STO | Sutter, Yuba | 35 min |
| Apr 8, 2:59 PM PDT | Tornado Warning | STO | Sacramento, Yolo | 31 min |
| Apr 8, 3:25 PM PDT | Severe Thunderstorm Warning | STO | Butte | 50 min |
| Apr 8, 3:29 PM PDT | Tornado Warning | STO | Sacramento | 37 min |
| Apr 8, 3:51 PM PDT | Severe Thunderstorm Warning | STO | San Joaquin | 39 min |
| Apr 8, 3:56 PM PDT | Tornado Warning | STO | San Joaquin | 34 min |
| Apr 8, 4:55 PM PDT | Severe Thunderstorm Warning | STO | El Dorado, Sacramento | 35 min |
Nearby
Tornado Warnings in California, 2005Every tornado warning in 2005Tornadoes 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.