Alert archive / California / Severe Thunderstorm Warnings in 2003
Severe Thunderstorm Warning 15, NWS Reno, NV
NWS Reno, NV issued this severe thunderstorm warning at Jul 31, 2003, 3:27 PM PDT for Nevada County, Sierra 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 counties it named.
The facts
- Issued
- Jul 31, 2003, 3:27 PM PDT (22:27 UTC)
- Expired
- Jul 31, 2003, 4:00 PM PDT
- In force
- 33 min
- Issued by
- NWS Reno, NV
- Area
- Whole counties
Counties Nevada County, CA, Sierra County, CA
The nearest sounding before it
Reno, NV (KREV), launched 12:00Z, 10.5 hours before the alert went out and 210 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
- 3 J/kg
- Mixed-layer CIN
- -379 J/kg
- Mixed-layer LCL
- 2514 m above ground
- 0-6 km bulk shear
- 14 kt
- 0-1 km storm-relative helicity
- 12 m²/s²
- 0-3 km storm-relative helicity
- 153 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
956 WUUS55 KREV 312227 SVRREV CAC057-091-312300- BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE RENO NV 325 PM PDT THU JUL 31 2003 THE NATIONAL WEATHER SERVICE HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... NORTHEASTERN NEVADA COUNTY IN CENTRAL CALIFORNIA THIS INCLUDES THE CITIES OF...PROSSER CREEK RESERVOIR...BOCA RESERVOIR EASTERN SIERRA COUNTY IN NORTHERN CALIFORNIA THIS INCLUDES THE CITIES OF...STAMPEDE RESERVOIR...SIERRAVILLE * UNTIL 400 PM PDT * AT 322 PM PDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM OVER INDEPENDENCE LAKE...OR ABOUT 5 MILES WEST OF STAMPEDE RESERVOIR...MOVING NORTHWEST AT 25 MPH. THE STORM WILL MOVE NORTHWEST NEAR HIGHWAY 89 TOWARD SIERRAVILLE. * THE SEVERE THUNDERSTORM WILL BE... 3 MILES NORTHEAST OF SIERRAVILLE AT 345 PM PDT 5 MILES NORTHEAST OF SATTLEY AT 355 PM PDT 4 MILES EAST OF CALPINE AT 400 PM PDT INTENSE RAINFALL AND FREQUENT LIGHTNING AS WELL AS HAIL WILL ACCOMPANY THIS STORM. EXPECT LOCAL FLOODING OF ROADWAYS. REPORT DAMAGING WEATHER TO THE NEAREST LAW ENFORCEMENT AGENCY. THEY WILL RELAY YOUR REPORT TO THE NATIONAL WEATHER SERVICE FORECAST OFFICE. $$
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 Reno, NV wrote its last area forecast discussion before this severe thunderstorm warning went out at Jul 31, 3:00 PM PDT, 27 minutes earlier.
Area forecast discussion, Jul 31, 3:00 PM PDT, 27 minutes before
WESTERN NEVADA AND EASTERN CALIFORNIA FORECAST DISCUSSION NATIONAL WEATHER SERVICE RENO NV 300 PM PDT THU JUL 31 2003 INVERTED SHORT WAVE TROUGH MOVING NORTHWEST THROUGH WESTERN NEVADA AND EASTERN CALIFORNIA HAD ALREADY HELPED PRODUCE STRONG CONVECTION ALONG THE WESTERN BOUNDARY OF THE FORECAST AREA THIS AFTERNOON. AIR MASS OVER THE REGION...ESPECIALLY SOUTHERN ZONES QUITE WET SO EXPECT MORE CONVECTION INTO THE EVENING AS WEAK SHORTWAVE CONTINUES TO MOVE NORTHWEST. WILL KEEP FLASH FLOOD WATCH OUT. ANOTHER ACTIVE AFTERNOON LIKELY ON FRIDAY AS WEAK UPPER LOW THAT HAS BEEN PARKED OFF THE SOUTHERN CALIFORNIA COAST THE PAST FEW DAYS FINALLY LIFTS OUT TO THE NORTHEAST...AGAIN PRODUCING A SOURCE OF VERTICAL MOTION FOR CONTINUING MOIST AIR OVER THIS REGION. HAVE INCREASED QPF AND POPS SOME FRIDAY AFTERNOON AND EVENING. THIS WEAK LOW OPENS UP INTO A WEAK TROUGH ON SATURDAY BUT IS VERY SLOW TO MOVE NORTHEAST SO THAT CONVECTION WILL LIKELY BE MORE WIDESPREAD ON SATURDAY THAN PREVIOUSLY FORECAST. INCREASED TROUGHING IN THE EASTERN PACIFIC ON SUNDAY FORECAST TO FINALLY BRING DRIER SOUTHWEST FLOW INTO THE REGION. LAMONI IN THE EXTENDED...MONDAY THROUGH THURSDAY...MODELS CONTINUE TO BREAK DOWN THE STRONG UPPER RIDGE BUT WITH A SLIGHTLY SLOWER ADVANCE OF THE THE PACIFIC TROF THAN PREVIOUS RUNS. LOWERING HEIGHTS ALONG WITH A MORE STABLE AND DRIER SOUTHWEST FLOW WILL REDUCE PRECIP CHANCES ACROSS WRN AND SRN ZONES MONDAY. STRONGER FLOW WILL PUSH BEST CHANCES MONDAY INTO ERN CHURCHILL... PERSHING... NRN WASHOE... LASSEN AND MODOC COUNTIES AHEAD OF VORT MAX FORECAST TO EJECT NORTHEAST OUT OF TROF OVER NRN CA AND OREGON MONDAY AFTERNOON. TUESDAY AND WEDNESDAY MAY STILL SEE SLIGHT CHANCE PRECIP FAR NRN WASHOE AND MODOC COUNTIES AHEAD OF WEAK DISTURBANCES MOVING UP INTO OREGON AND IDAHO. ELSEWHERE SOUTHWEST FLOW WILL KEEP ZONES DRY THRU THURSDAY. MAX TEMPERATURES WILL REAMING 3-5 DEGREES BELOW NORMAL...WITH A RETURN TO COMFORTABLE AND NEAR NORMAL MORNING LOWS. BENINATO .REV...FLASH FLOOD WATCH UNTIL 9 PM NVC021-019-005-CAC003-051-
Hazardous weather outlook, Jul 31, 6:45 AM PDT, 8 hours 42 minutes before
CAZ070>073-NVZ001>005-311400- HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE RENO NV 645 AM PDT THU JUL 31 2003 THIS HAZARDOUS WEATHER OUTLOOK IS FOR WESTERN NEVADA...THE EASTERN SIERRA AND NORTHEASTERN CALIFORNIA. ...FLASH FLOOD WATCH IN EFFECT UNTIL 9PM THIS EVENING FOR DOUGLAS... MINERAL...SOUTHERN LYON...MONO AND ALPINE COUNTIES... .DAY ONE...TODAY MOIST AND UNSTABLE CONDITIONS OVER WESTERN NEVADA AND EASTERN CALIFORNIA WILL PRODUCE SHOWERS AND THUNDERSTORMS THIS AFTERNOON AND EVENING. FLASH FLOODING WILL BE A THREAT SOUTH OF HIGHWAY 50...WITH LOCALLY HEAVY RAINFALL TO THE NORTH OF HIGHWAY 50. ADDITIONAL DETAILS CAN BE FOUND IN THE LATEST FLOOD WATCH STATEMENT (WGUS65 KREV). .DAYS TWO THROUGH SEVEN...FRIDAY THROUGH THURSDAY THE MOIST AND UNSTABLE CONDITIONS WILL CONTINUE THROUGH SUNDAY WITH DRIER CONDITION FOR EARLY NEXT WEEK. .SPOTTER INFORMATION STATEMENT... SKYWARN ACTIVATION MAY BE REQUIRED FOR THE FLASH FLOOD THREAT THIS AFTERNOON. WEATHER SPOTTERS ARE ASKED TO REPORT SIGNIFICANT WEATHER CONDITIONS TO THEIR LOCAL NATIONAL WEATHER SERVICE OFFICE. BRONG
In the hours before
Special weather statement, Jul 31, 2:48 PM PDT, 39 minutes before
CAC061-312215- SPEICAL WEATHER STATEMENT NATIONAL WEATHER SERVICE RENO NV 248 PM PDT THU JUL 31 2003 ...A THUNDERSTORM WITH TORRENTIAL RAIN AND INTENSE LIGHTNING WEST OF LAKE TAHOE... AT 250 PM THE COAST GUARD AT LAKE TAHOE ALONG THE NORTHWEST SHORE NEAR TAHOE CITY REPORTED A THUNDERSTORM WITH VERY HEAVY RAIN AND INTENSE LIGHTNING. ESTIMATES OF UP TO 1/2 INCH OF RAIN IN ONLY 20 MINUTES WERE REPORTED. THE STORM WILL MOVE NORTHWEST AT 20 MPH AND WILL HIT SQUAW VALLEY BY 253 PM PDT AND DONNER PASS BY 310 PM PDT. MOTORISTS SHOULD BE PREPARED FOR 15 TO 20 MINUTES OF HEAVY RAIN AND INTENSE LIGHTNING AS THIS STORM PASSES. JAH
Special weather statement, Jul 31, 2:48 PM PDT, 39 minutes before
CAZ072-NVZ002-312215- SPEICAL WEATHER STATEMENT NATIONAL WEATHER SERVICE RENO NV 248 PM PDT THU JUL 31 2003 ...A THUNDERSTORM WITH TORRENTIAL RAIN AND INTENSE LIGHTNING WEST OF LAKE TAHOE... AT 250 PM THE COAST GUARD AT LAKE TAHOE ALONG THE NORTHWEST SHORE NEAR TAHOE CITY REPORTED A THUNDERSTORM WITH VERY HEAVY RAIN AND INTENSE LIGHTNING. ESTIMATES OF UP TO 1/2 INCH OF RAIN IN ONLY 20 MINUTES WERE REPORTED. THE STORM WILL MOVE NORTHWEST AT 20 MPH AND WILL HIT SQUAW VALLEY BY 253 PM PDT AND DONNER PASS BY 310 PM PDT. MOTORISTS SHOULD BE PREPARED FOR 15 TO 20 MINUTES OF HEAVY RAIN AND INTENSE LIGHTNING AS THIS STORM PASSES. JAH
The office that day
Everything else NWS Reno, NV issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 31, 1:53 PM PDT | Severe Thunderstorm Warning | REV | El Dorado, Placer | 22 min |
| Jul 31, 2:59 PM PDT | Severe Thunderstorm Warning | REV | Nevada, Placer, Sierra | 16 min |
| Jul 31, 3:12 PM PDT | Severe Thunderstorm Warning | REV | Nevada, Sierra | 18 min |
| Jul 31, 3:28 PM PDT | Flash Flood Warning | REV | Nevada, Sierra | 92 min |
| Jul 31, 3:39 PM PDT | Tornado Warning | REV | Sierra | 21 min |
| Jul 31, 4:00 PM PDT | Severe Thunderstorm Warning | REV | Plumas, Sierra | 25 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.