Alert archive / California / Flash Flood Warnings in 2011
Flash Flood Warning 8, NWS Reno, NV
NWS Reno, NV issued this flash flood warning at Sep 11, 2011, 4:54 PM PDT for Placer County, California; Washoe County, Nevada. It was in force for 109 min. 1 report 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
- Sep 11, 2011, 4:54 PM PDT (23:54 UTC)
- Expired
- Sep 11, 2011, 6:43 PM PDT
- In force
- 109 min
- Issued by
- NWS Reno, NV
- Area
- Storm-based polygon
- Flood severity
- None
Counties Placer County, CA, Washoe County, NV
The radar
The Reno radar (KRGX), 75 km from the middle of the area, began a volume at 23:56 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.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Sep 11, 5:30 PM PDT | FLASH FLOOD | Kings Beach, CA | STREET FLOODING OCCURRED ALONG HIGHWAY 28 NEAR THE INTERSECTION OF HIGHWAY 267. TIME OF THE EVENT IS APPROXIMATE. |
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 12:00Z, 11.9 hours before the alert went out and 160 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
- 23 J/kg
- Mixed-layer CIN
- -190 J/kg
- Mixed-layer LCL
- 2101 m above ground
- 0-6 km bulk shear
- 6 kt
- 0-1 km storm-relative helicity
- -17 m²/s²
- 0-3 km storm-relative helicity
- 20 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
122 WGUS55 KREV 112354 FFWREV CAC061-NVC031-120145- /O.NEW.KREV.FF.W.0008.110911T2354Z-110912T0145Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ BULLETIN - EAS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE RENO NV 454 PM PDT SUN SEP 11 2011 THE NATIONAL WEATHER SERVICE IN RENO HAS ISSUED A * FLASH FLOOD WARNING FOR... NORTHEASTERN PLACER COUNTY IN CENTRAL CALIFORNIA... THIS INCLUDES THE CITY OF KINGS BEACH... EXTREME SOUTHWESTERN WASHOE COUNTY IN WESTERN NEVADA THIS INCLUDES THE CITY OF INCLINE VILLAGE... * UNTIL 645 PM PDT * AT 443 PM PDT...THE PUBLIC REPORTED HEAVY RAIN IN KINGS BEACH WITH WATER RUNNING OVER ROADS...ADDITIONAL STORMS WILL MOVE INTO THE NORTH SHORE OF LAKE TAHOE BETWEEN CARNELIAN BAY AND INCLINE VILLAGE. * LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO CRYSTAL BAY...KINGS BEACH...TAHOE VISTA AND INCLINE VILLAGE. * RAINFALL RATES MAY REACH UP TO 1 INCH PER HOUR BETWEEN NOW AND 6 PM. EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF SMALL CREEKS AND STREAMS...URBAN AREAS...HIGHWAYS...STREETS AND UNDERPASSES AS WELL AS OTHER DRAINAGE AREAS AND LOW LYING SPOTS. REPORT FLOODING TO THE LOCAL AUTHORITIES OR DIRECTLY TO THE NATIONAL WEATHER SERVICE OFFICE IN RENO NEVADA. LAT...LON 3917 12000 3920 12010 3931 12003 3931 11995 $$ BRONG
3 follow-up statements
190 WGUS75 KREV 120045 FFSREV FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE RENO NV 545 PM PDT SUN SEP 11 2011 CAC061-NVC031-120145- /O.CON.KREV.FF.W.0008.000000T0000Z-110912T0145Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ PLACER CA-WASHOE NV- 545 PM PDT SUN SEP 11 2011 ...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 645 PM PDT FOR EXTREME SOUTHWESTERN WASHOE AND NORTHEASTERN PLACER COUNTIES... AT 531 PM PDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO INDICATE A THUNDERSTORM PRODUCING FLASH FLOODING OVER THE WARNED AREA. RADAR RAINFALL ESTIMATES OF 1.75 INCHES OF RAIN HAS OCCURRED SINCE 430 PM NEAR MARTIS PEAK...ABOUT 3 MILES NORTH OF KINGS BEACH. LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO CRYSTAL BAY...TAHOE VISTA...KINGS BEACH AND THE WESTERN PORTION OF INCLINE VILLAGE. EXCESSIVE RUNOFF FROM HEAVY RAINFALL OVER MARTIS PEAK WILL CAUSE RAPID RISES ON CREEKS DRAINING INTO LAKE TAHOE BETWEEN TAHOE VISTA AND THE WEST SIDE OF INCLINE VILLAGE. FLOODING OF SMALL CREEKS AND STREAMS...URBAN AREAS...HIGHWAYS...STREETS AND UNDERPASSES AS WELL AS OTHER DRAINAGE AREAS AND LOW LYING SPOTS. LAT...LON 3917 12000 3920 12010 3931 12003 3931 11995 $$ BRONG
307 WGUS75 KREV 120117 FFSREV FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE RENO NV 617 PM PDT SUN SEP 11 2011 NVC031-120123- /O.CAN.KREV.FF.W.0008.000000T0000Z-110912T0145Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ WASHOE NV- 617 PM PDT SUN SEP 11 2011 ...THE FLASH FLOOD WARNING HAS BEEN CANCELLED FOR EXTREME SOUTHWESTERN WASHOE COUNTY... HEAVY RAIN HAS MOVED AWAY FROM MT BALDY AND THE CREEKS DRAINING INTO THE WEST SIDE INCLINE VILLAGE...WITH A DIMINISHING FLOOD THREAT. LAT...LON 3918 12001 3920 12010 3931 12003 3931 12001 $$ CAC061-120145- /O.CON.KREV.FF.W.0008.000000T0000Z-110912T0145Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ PLACER CA- 617 PM PDT SUN SEP 11 2011 ...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 645 PM PDT FOR NORTHEASTERN PLACER COUNTY... AT 606 PM PDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO INDICATE A THUNDERSTORM PRODUCING HEAVY RAIN NEAR MARTIS PEAK AND ALONG HIGHWAY 267 BETWEEN BROCKWAY SUMMIT AND KINGS BEACH LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO TAHOE VISTA AND KINGS BEACH. EXCESSIVE RUNOFF FROM HEAVY RAINFALL OVER MARTIS PEAK WILL CAUSE RAPID RISES ON CREEKS DRAINING INTO LAKE TAHOE BETWEEN TAHOE VISTA AND KINGS BEACH. FLOODING OF SMALL CREEKS AND STREAMS...URBAN AREAS...HIGHWAYS...STREETS AND UNDERPASSES AS WELL AS OTHER DRAINAGE AREAS AND LOW LYING SPOTS. LAT...LON 3918 12001 3920 12010 3931 12003 3931 12001 $$ BRONG
758 WGUS75 KREV 120143 FFSREV FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE RENO NV 643 PM PDT SUN SEP 11 2011 CAC061-120149- /O.CAN.KREV.FF.W.0008.000000T0000Z-110912T0145Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ PLACER CA- 643 PM PDT SUN SEP 11 2011 ...THE FLASH FLOOD WARNING HAS BEEN CANCELLED FOR NORTHEASTERN PLACER COUNTY... THE THUNDERSTORM OVER BROCKWAY SUMMIT AND MARTIS PEAK HAS DISSIPATED...WITH A DIMINISHED FLOOD THREAT. HIGH FLOWS MAY CONTINUE ON CREEKS IN AND NEAR TAHOE VISTA AND KINGS BEACH THROUGH 730 PM AND MINOR FLOODING OF LOW SPOTS MAY CONTINUE FOR SEVERAL HOURS. LAT...LON 3918 12001 3920 12010 3931 12003 3931 12001 $$ BRONG
The office that day
Everything else NWS Reno, NV issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 11, 2:58 PM PDT | Special Weather Statement | REV | Sierra | 32 min |
| Sep 11, 3:58 PM PDT | Special Weather Statement | REV | Sierra | 47 min |
| Sep 11, 4:58 PM PDT | Special Weather Statement | REV | Sierra | 62 min |
| Sep 11, 1:38 PM PDT | Special Weather Statement | REV | 22 min | |
| Sep 11, 3:15 PM PDT | Flash Flood Warning | REV | Washoe | 2 hr |
| Sep 11, 3:28 PM PDT | Areal Flood Warning | REV | Douglas | 3 hr |
| Sep 11, 4:23 PM PDT | Special Weather Statement | REV | 37 min | |
| Sep 11, 4:54 PM PDT | Special Weather Statement | REV | 66 min |
Nearby
Flash Flood Warnings in California, 2011Flash Flood Warnings in Nevada, 2011Every flash flood warning in 2011
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; radar from the NEXRAD Level II archive.