Alert archive / California / Severe Thunderstorm Warnings in 2001
Severe Thunderstorm Warning 4, NWS Reno, NV
NWS Reno, NV issued this severe thunderstorm warning at Jul 10, 2001, 3:00 PM PDT for Nevada County, Sierra County, California. It was in force for 30 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
- Jul 10, 2001, 3:00 PM PDT (22:00 UTC)
- Expired
- Jul 10, 2001, 3:30 PM PDT
- In force
- 30 min
- Issued by
- NWS Reno, NV
- Area
- Whole counties; the outline is the Mesonet’s reconstruction
Counties Nevada County, CA, Sierra County, CA
The nearest sounding before it
Reno, NV (KREV), launched 12:00Z, 10.0 hours before the alert went out and 168 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
- 16 J/kg
- Mixed-layer CIN
- -195 J/kg
- Mixed-layer LCL
- 2236 m above ground
- 0-6 km bulk shear
- 20 kt
- 0-1 km storm-relative helicity
- 10 m²/s²
- 0-3 km storm-relative helicity
- 39 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000 WUUS55 KREV 102155 SVRRNO CAC057-091-102230- BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE RENO NV 300 PM PDT TUE JUL 10 2001 THE NATIONAL WEATHER SERVICE HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... EXTREME NORTHEASTERN NEVADA COUNTY IN CENTRAL CALIFORNIA THIS INCLUDES...BOCA RESERVOIR AND PROSSER CREEK RESERVOIR SOUTHEASTERN SIERRA COUNTY IN NORTHERN CALIFORNIA THIS INCLUDES STAMPEDE RESERVOIR * UNTIL 330 PM PDT * AT 240 PM PDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM OVER HIRSCHDALE...OR ABOUT 3 MILES SOUTH OF BOCA RESERVOIR...MOVING NORTH AT 5 MPH. * THE SEVERE THUNDERSTORM WILL BE NEAR... OVER BOCA RESERVOIR AT 300 PM PDT OVER STAMPEDE RESERVOIR AT 330 PM PDT IF SEVERE WEATHER APPROACHES YOUR AREA...GO INSIDE A STURDY SHELTER AWAY FROM CREEK BEDS AND OTHER FLOOD-PRONE AREAS. REMEMBER...A SEVERE THUNDERSTORM CAN PRODUCE LARGE DAMAGING HAIL...DAMAGING WINDS IN EXCESS OF 55 MPH...DEADLY LIGHTNING...AND VERY HEAVY RAIN. HAIL...INTENSE RAIN AND STRONG DAMAGING WINDS ARE LIKELY WITH THIS STORM. TAKE COVER IN A SUBSTANTIAL SHELTER UNTIL THE STORM PASSES. HEAVY RAINS MAY FLOOD LOW LYING AREAS SUCH AS DITCHES AND UNDERPASSES. AVOID THESE AREAS AND DO NOT CROSS FLOODED ROADS AS THEY MAY BE WASHED OUT. WATER LEVELS OF SMALL STREAMS AND RIVERS MAY ALSO RISE...THEREFORE SEEK HIGHER GROUND IF THREATENED BDY FLOOD WATERS. REPORT DAMAGING WEATHER TO THE NEAREST LAW ENFORCEMENT AGENCY. THEY WILL RELAY YOUR REPORT TO THE NATIONAL WEATHER SERVICE FORECAST OFFICE. LAT...LON 3933 12019 3932 12002 3954 12002 3953 12029
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 10, 3:00 PM PDT, 0 minutes earlier.
Area forecast discussion, Jul 10, 3:00 PM PDT, 0 minutes before
WESTERN NEVADA AND EASTERN CALIFORNIA FORECAST DISCUSSION NATIONAL WEATHER SERVICE RENO NV 300 PM PDT TUE JUL 10 2001 NE CA TO WRN NV IS ACTIVE WITH CONVECTION THIS AFTERNOON AFTER BEING INITIATED OVER THE SIERRA AND NE CA MOUNTAINS. UPPER DIVERGENCE IS PRODUCING STRONG THUNDERSTORMS OVER NE CA AND DEVELOPMENT IS EXPECTED TO SPREAD TO WEST CENTRAL NV UNDER A FAVORABLE UPPER/LOWER COUPLET THROUGH THIS EVENING. ALTHOUGH PRECIPITABLE WATER IS A MARGINAL .75 INCH...STORMS ARE MOVING SLOW ENOUGH TO PRESENT A RISK OF LOCAL HEAVY RAIN. A FEW STORMS MAY ALSO PRODUCE LARGE HAIL...MAINLY FROM ABOUT TAHOE NORTH UNDER THE UPPER DIVERGENCE. PRECIPITATION MAY LINGER IN THE WEST CENTRAL THROUGH LATE EVENING BUT THE TREND AFTER 9 PM SHOULD BE DECREASING WITH AT LEAST PARTIAL CLEARING OVERNIGHT. STRONGER SW WIND ALOFT WEDNESDAY AFTERNOON SHOULD MOVE THUNDERSTORMS OFF THE SIERRA CREST BUT NOT BY MUCH WITH SCATTERED ACTIVITY STILL NORTH AND WEST CENTRAL NV. THE SW FLOW BECOMES STRONGER STILL THURSDAY WITH THE AIRMASS STABILIZING AND SOME HIGH LEVEL MOISTURE POSSIBLY LEE ENHANCED OFF THE SIERRA BY AFTERNOON. THERE MAY SOME RISK OF SHOWERS NE CA AS A VORTICITY MAXIMUM MOVES NE OVER THE AREA WITH SHORT WAVE MOVING INLAND FROM OFF THE WEST COAST. THE EXTENDED PERIOD IS MAINLY UNDER THE INFLUENCE OF DRY SOUTHWEST FLOW ALOFT WITH COOLER BREEZY CONDITIONS SUNDAY THROUGH TUESDAY. OSTERMAN. .REV...FLASH FLOOD WATCH ZONES CAZ 70>73 AND NVZ 1>5 UNTIL 9 PM.
In the hours before
Local storm report, Jul 10, 10:27 AM PDT, 4 hours 33 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE RENO, NV
1027 AM PDT TUE JUL 10 2001
TIME(PDT) .....CITY LOCATION.....STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
0116 PM PORTOLA CA .88 INCH HAIL
07/10/01 PLUMAS REPORTED BY SPOTTERS
0135 PM PORTOLA CA WIND DAMAGE
07/10/01 PLUMAS SPOTTERS REPORTED
ELECTRICITY OUT
0144 PM PORTOLA CA FLASH FLOOD
07/10/01 PLUMAS SPOTTERS REPORTED SOME
STREET FLOODING
0144 PM 2 W PORTOLA CA FLASH FLOOD
07/10/01 PLUMAS >0.75 INCHES OF RAIN IN <
30 MINUTES.
0222 PM KINGSBURY GRADE NV FLASH FLOOD
07/10/01 DOUGLAS COUNTY MUD/ROCK SLIDES REPORTED
0250 PM TRUCKEE CA .75 INCH HAIL
07/10/01 NEVADA
0259 PM GLENSHIRE CA .75 INCH HAIL
07/10/01 NEVADA
0500 PM 6 SW GARDNERVILLE NV FLASH FLOOD
07/10/01 DOUGLAS 1.39 INCHES OF RAIN IN 2
HOURS
0515 PM TOPAZ LAKE NV FLASH FLOOD
07/10/01 DOUGLAS STORM TOTAL PRECIP: 0.91
INCHES
0515 PM LOYALTON CA FLASH FLOOD
07/10/01 SIERRA 0.75 INCHES OF RAIN IN 2
1/2 HOURS. ROADWAY AND
STREAM FLOODING.The office that day
Everything else NWS Reno, NV issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 10, 1:29 PM PDT | Severe Thunderstorm Warning | REV | Plumas | 31 min |
| Jul 10, 2:15 PM PDT | Severe Thunderstorm Warning | REV | Alpine | 45 min |
| Jul 10, 3:45 PM PDT | Severe Thunderstorm Warning | REV | Placer | 45 min |
| Jul 10, 4:20 PM PDT | Flash Flood Warning | REV | Alpine, Mono | 55 min |
| Jul 10, 4:40 PM PDT | Flash Flood Warning | REV | Nevada, Placer | 60 min |
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.