Alert archive / California / Severe Thunderstorm Warnings in 2003
Severe Thunderstorm Warning 15, NWS Sacramento, CA
NWS Sacramento, CA issued this severe thunderstorm warning at May 7, 2003, 7:42 PM PDT for Tehama County, California. It was in force for 33 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
- May 7, 2003, 7:42 PM PDT (02:42 UTC)
- Expired
- May 7, 2003, 8:15 PM PDT
- In force
- 33 min
- Issued by
- NWS Sacramento, CA
- Area
- Counties, with a storm outline in the text
County Tehama County, CA
Did it verify
Not verified. The Iowa Environmental Mesonet's Cow found no qualifying storm report inside this severe thunderstorm 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
Medford/Jackson, OR (KMFR), launched 00:00Z, 2.7 hours before the alert went out and 251 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
- 2839 m above ground
- 0-6 km bulk shear
- 21 kt
- 0-1 km storm-relative helicity
- -9 m²/s²
- 0-3 km storm-relative helicity
- 35 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
116 WUUS56 KSTO 080242 SVRSTO CAC103-080315- BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE SACRAMENTO CA 737 PM PDT WED MAY 7 2003 THE NATIONAL WEATHER SERVICE HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... CENTRAL TEHAMA COUNTY IN CALIFORNIA * VALID UNTIL 815 PM PDT * AT 729 PM PDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO INDICATE A PERSISTENT SEVERE THUNDERSTORM 9 MILES WEST OF RED BLUFF... MOVING SOUTH AT 5 TO 10 MPH. THIS SLOW MOVING STORM WILL PRODUCE TORRENTIAL RAIN AND LARGE HAIL. * SOME LOCATIONS AFFECTED BY THIS WARNING INCLUDE... RED BLUFF RED BANK ROUTES A7 AND A9 FLOURNOY SEVERE THUNDERSTORMS ARE CAPABLE OF PRODUCING FUNNEL CLOUDS AND TORNADOES. THE HEAVY RAINFALL MAY PRODUCE LOCALIZED SMALL STREAM FLOODING. LAT...LON 4027 12227 4021 12254 3993 12249 3999 12219 TARDY
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 Sacramento, CA wrote its last area forecast discussion before this severe thunderstorm warning went out at May 7, 2:14 PM PDT, 5 hours 28 minutes earlier.
Area forecast discussion, May 7, 2:14 PM PDT, 5 hours 28 minutes before
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE SACRAMENTO CA 215 9M PDT WED MAY 07 2003 UPPER LEVEL DISTURBANCE HAS LEFT SPRINKLINGS OF PRECIPITATION AROUND THE REGION TODAY... MOSTLY MEASURING LESS THAN 1/10 OF AN INCH. A MODICUM INSTABILITY ASSOCIATED WITH THE LEFT-OVER CUMULUS HAS CAUSED ME TO LEAVE ISOLATED LOWER ELEVATION THUNDERSTORMS FOR EARLY THIS EVENING... BUT CONFIDENCE LEVEL FOR OCCURRENCE AT THIS TIME IS LOW. AS THE NEXT DEEPER LOW DROPS SOUTH INTO THE AREA TONIGHT INTO THURSDAY, HOWEVER, THIS WILL BE A HORSE OF A DIFFERENT COLOUR. COOLER AIR WILL DROP THE SNOW LEVELS TO 3,500 TO 4,000 FEET IN THE NORTH - AND JUST ABOVE THAT FOR THE SOUTH. QPF FORECASTS ARE LOW ENOUGH TO NOT WORRY ABOUT ANYTHING REACHING ADVISORY CRITERIA. SEEMS STRANGE TO STILL BE TALKING ABOUT SNOW STORMS IN MAY... BUT SUCH IS MOTHERS NATURE. DEEP AND MOIST CONVECTIVE ACTIVITY WILL BE ANOTHER STORY, HOWEVER, AS INDICES FOR THURSDAY AFTERNOON FOR THIS PHENOMENA ARE HIGHER THAN TODAY. THAT UPPER LOW WILL MIGRATE EAST THURSDAY NIGHT INTO FRIDAY LEAVING JUST RESIDUAL, MAINLY HIGHER ELEVATION SHOWERS. ANOTHER LOW DROPPING INTO OREGON ON THE WEEKEND SEEMS TO ENTRAIN SOME OF THE MOISTURE AND NRG FROM THE LAST SYSTEM, TO KEEP A CHANCE OF SHOWERY ACTIVITY MAINLY IN THE NORTHERN MOUNTAINS. SHORT- WAVE RIDGING WILL DRY THE SOUTHERN REALMS THROUGH THE MIDDLE OF NEXT WEEK, BUT THE LOW DROPPING SOUTH THROUGH NEVADA ON TUESDAY WILL KEEP A CHANCE OF SIERRA SHOWERS FOR THEN... THEN ANOTHER TROUGH TO THE NORTH ON WEDNESDAY WILL INTRODUCE POPS THERE FOR THAT TIME PERIOD. RANDY HARTLEY .STO...NONE. BLU JE 031/036 028/041 032 69488 RBL WE 048/061 044/065 049 69477 SAC WB 046/063 044/063 050 69377
Hazardous weather outlook, May 7, 7:00 AM PDT, 12 hours 42 minutes before
CAZ013>019-063-064-066>069-081400- HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE SACRAMENTO CA 700 AM PDT WED MAY 7 2003 THIS HAZARDOUS WEATHER OUTLOOK IS FOR INTERIOR NORTHERN CALIFORNIA. .DAY ONE...TODAY ISOLATED THUNDERSTORMS ARE FORECAST FOR THE SACRAMENTO VALLEY TODAY. REFER TO THE ZONE FORECAST (FPUS56 ZFPSTO) FOR DETAILS. .DAYS TWO THROUGH SEVEN... RAIN LIKELY WITH SNOW IN THE MOUNTAINS ON THURSDAY. THUNDERSTORMS WITH SMALL HAIL ARE ALSO POSSIBLE. OTHERWISE NO HAZARDOUS WEATHER IS EXPECTED THROUGH THE FORECAST PERIOD. .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/SACRAMENTO SMITH
The office that day
Everything else NWS Sacramento, CA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 7, 6:57 PM PDT | Severe Thunderstorm Warning | STO | Tehama | 43 min |
| May 7, 7:44 PM PDT | Severe Thunderstorm Warning | STO | Tehama | 31 min |
Nearby
Severe Thunderstorm Warnings in California, 2003Every severe thunderstorm warning in 2003
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.