Alert archive / California / Flash Flood Warnings in 2012
Flash Flood Warning 4, NWS Reno, NV
NWS Reno, NV issued this flash flood warning at Aug 15, 2012, 5:04 PM PDT for Nevada County, California. It was in force for 116 min. 2 reports came from inside the area while it was in force.
The area
The outline as issued, with what was reported inside it.
The facts
- Issued
- Aug 15, 2012, 5:04 PM PDT (00:04 UTC)
- Expired
- Aug 15, 2012, 7:00 PM PDT
- In force
- 116 min
- Issued by
- NWS Reno, NV
- Area
- Storm-based polygon
- Flood severity
- None
County Nevada County, CA
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Aug 15, 5:41 PM PDT | HEAVY RAIN 0 | Hirschdale, CA | CALIFORNIA HIGHWAY PATROL IS REPORTING WATER COVERING THE ROAD AT INTERSTATE 80 AND THE HIRSHDALE OFFRAMP. |
| Aug 15, 5:47 PM PDT | HEAVY RAIN 2.33 | 3 S Boca Reservoir, CA | 2.33 INCHES TOTAL RAINFALL IN 1 HOUR MEASURED IN GLENSHIRE AREA OF TRUCKEE. 2 TO 6 INCHES WATER RUNNING DOWN LOCAL STREETS. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Reno, NV (KREV), launched 00:00Z, 0.1 hours before the alert went out and 166 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
- 44 J/kg
- Mixed-layer CIN
- -81 J/kg
- Mixed-layer LCL
- 2543 m above ground
- 0-6 km bulk shear
- 14 kt
- 0-1 km storm-relative helicity
- -17 m²/s²
- 0-3 km storm-relative helicity
- 63 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
387 WGUS55 KREV 160004 FFWREV CAC057-160200- /O.NEW.KREV.FF.W.0004.120816T0004Z-120816T0200Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ BULLETIN - EAS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE RENO NV 504 PM PDT WED AUG 15 2012 THE NATIONAL WEATHER SERVICE IN RENO HAS ISSUED A * FLASH FLOOD WARNING FOR... EAST CENTRAL NEVADA COUNTY IN CENTRAL CALIFORNIA... * UNTIL 700 PM PDT * AT 458 PM PDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED FLASH FLOODING FROM A THUNDERSTORM OVER THE WARNED AREA. * LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO GLENSHIRE...HIRSCHDALE AND THE MARTIS VALLEY. A STATIONARY THUNDERSTORM IS PRODUCING HEAVY RAIN OVER THE TRUCKEE GLENSHIRE AREA. A SPOTTER REPORTED TWO-THIRDS OF AN INCH OF RAIN IN THE LAST 20 MINUTES...WITH HAIL COVERING ROADS. THIS COMBINED WITH OVER 1 INCH OF RAINFALL YESTERDAY WILL LEAD TO FLASH FLOODING. EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF SMALL CREEKS AND STREAMS...HIGHWAYS AND UNDERPASSES. ADDITIONALLY...COUNTRY ROADS...AND RANCHLAND ALONG THE BANKS OF CREEKS...STREAMS AND OTHER LOW LYING AREAS ARE SUBJECT TO FLOODING. NEVER DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE ROADWAY. LAT...LON 3938 12016 3938 12004 3932 12003 3932 12016 $$ BRONG
3 follow-up statements
372 WGUS75 KREV 160015 FFSREV FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE RENO NV 515 PM PDT WED AUG 15 2012 CAC057-160200- /O.CON.KREV.FF.W.0004.000000T0000Z-120816T0200Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ NEVADA CA- 515 PM PDT WED AUG 15 2012 ...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 700 PM PDT FOR EAST CENTRAL NEVADA COUNTY... AT 507 PM PDT...TRAINED WEATHER SPOTTERS IN THE TRUCKEE GLENSHIRE AREA HAVE REPORTED 1.25 INCHES OF RAIN WITH LARGE HAIL IN THE LAST 35 MINUTES. AN ADDITIONAL 1 TO 2 INCHES OF RAIN IS LIKELY IN THE WARNED AREA THROUGH 6 PM. * LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO GLENSHIRE...HIRSCHDALE...THE MARTIS VALLEY AND INTERSTATE 80 BETWEEN TRUCKEE AND FLORISTON. EXCESSIVE RUNOFF FROM HEAVY RAINFALL AND SATURATED SOILS WILL CAUSE FLOODING OF SMALL CREEKS AND STREAMS...HIGHWAYS...STREETS AND UNDERPASSES. MOST FLOOD DEATHS OCCUR IN AUTOMOBILES. NEVER DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE ROADWAY. FLOOD WATERS ARE USUALLY DEEPER THAN THEY APPEAR. A FEW INCHES OF FAST FLOWING WATER IS POWERFUL ENOUGH TO SWEEP VEHICLES OFF THE ROAD. LAT...LON 3938 12016 3938 12004 3932 12003 3932 12016 $$ BRONG
936 WGUS75 KREV 160040 FFSREV FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE RENO NV 540 PM PDT WED AUG 15 2012 CAC057-160200- /O.CON.KREV.FF.W.0004.000000T0000Z-120816T0200Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ NEVADA CA- 540 PM PDT WED AUG 15 2012 ...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 700 PM PDT FOR EAST CENTRAL NEVADA COUNTY... AT 536 PM PDT...THE THUNDERSTORM PRODUCING VERY HEAVY RAIN OVER INTERSTATE 80 EAST OF TRUCKEE IS SLOWLY MOVING NORTH OVER BOCA AND PROSSER CREEK RESERVOIRS. JUST AFTER 5 PM...TRAINED WEATHER SPOTTERS IN THE TRUCKEE GLENSHIRE AREA REPORTED OVER 1 INCH OF RAIN IN 35 MINUTES. THE CALIFORNIA HIGHWAY PATROL ALSO REPORTED ROCKS AND MUD ARE COVERING A PORTION OF INTERSTATE 80 NEAR FARAD. * LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO GLENSHIRE...HIRSCHDALE...BOCA AND PROSSER CREEK RESERVOIRS AND INTERSTATE 80 BETWEEN TRUCKEE AND FLORISTON. NEVER DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE ROADWAY. A FEW INCHES OF FAST FLOWING WATER IS POWERFUL ENOUGH TO SWEEP VEHICLES OFF THE ROAD. CAMPERS AND BOATERS AT BOCA...PROSSER AND STAMPEDE RESERVOIRS SHOULD SEEK SHELTER UNTIL THE THUNDERSTORM PASSES. LAT...LON 3938 12016 3938 12004 3932 12003 3932 12016 $$ BRONG
140 WGUS75 KREV 160153 FFSREV FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE RENO NV 653 PM PDT WED AUG 15 2012 CAC057-160200- /O.EXP.KREV.FF.W.0004.000000T0000Z-120816T0200Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ NEVADA CA- 653 PM PDT WED AUG 15 2012 ...THE FLASH FLOOD WARNING WILL EXPIRE AT 700 PM PDT FOR EAST CENTRAL NEVADA COUNTY... THE THREAT FOR CONTINUED FLASH FLOODING HAS DIMINISHED. REMEMBER THAT MINOR FLOODING OR RUNOFF MAY CONTINUE IN LOW SPOTS FOR SEVERAL HOURS. THIS INCLUDES AREAS AROUND...BUT NOT LIMITED TO... GLENSHIRE...HIRSCHDALE...AND THE MARTIS VALLEY. LAT...LON 3938 12016 3938 12004 3932 12003 3932 12016 $$ DF
Nearby
Flash Flood Warnings in California, 2012Every flash flood warning in 2012
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive.