Alert archive / California / Flash Flood Warnings in 2011
Flash Flood Warning 4, NWS Reno, NV
NWS Reno, NV issued this flash flood warning at Jul 29, 2011, 4:43 PM PDT for Mono County, California. It was in force for 3 hr. 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
- Jul 29, 2011, 4:43 PM PDT (23:43 UTC)
- Expired
- Jul 29, 2011, 7:45 PM PDT
- In force
- 3 hr
- Issued by
- NWS Reno, NV
- Area
- Storm-based polygon
- Flood severity
- None
County Mono County, CA
The radar
The Reno radar (KRGX), 135 km from the middle of the area, began a volume at 23:43 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 |
|---|---|---|---|
| Jul 29, 5:35 PM PDT | FLASH FLOOD | Walker, CA | FLASH FLOOD REPORTED IN WALKER CANYON WITH ROCKS MOVED ONTO HIGHWAY 395. |
| Jul 29, 6:34 PM PDT | FLASH FLOOD | 2 Nw Walker, CA | CHP REPORTS WATER FLOWING ON HIGHWAY 395 SOUTHBOUND LANES NEAR MILL CANYON ROAD WITH BOULDERS ON SHOULDER OF HIGHWAY. DRAINAGE PIPE ALONG HIGHWAY 395 CLOGGED WITH SAND. |
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, 11.7 hours before the alert went out and 159 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
- 0 m above ground
- 0-6 km bulk shear
- 13 kt
- 0-1 km storm-relative helicity
- -10 m²/s²
- 0-3 km storm-relative helicity
- 128 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
293 WGUS55 KREV 292343 FFWREV CAC051-300245- /O.NEW.KREV.FF.W.0004.110729T2343Z-110730T0245Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ BULLETIN - EAS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE RENO NV 443 PM PDT FRI JUL 29 2011 THE NATIONAL WEATHER SERVICE IN RENO HAS ISSUED A * FLASH FLOOD WARNING FOR... NORTHWESTERN MONO COUNTY IN CENTRAL CALIFORNIA... THIS INCLUDES THE CITIES OF COLEVILLE AND WALKER... * UNTIL 745 PM PDT * AT 429 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 WALKER AND COLEVILLE AND HIGHWAY 395 IN THAT VICINITY STRONG THUNDERSTORM NEAR WALKER AND COLEVILLE CONTINUES TO RAIN HEAVILY...WITH RAINFALL RATES EXCEEDING ONE INCH PER HOUR IN THE HIGHER TERRAIN WEST OF HIGHWAY 395. HEAVY RAINFALL IN THE MOUNTAINS TO THE WEST OF HIGHWAY 395 COULD CAUSE FLASH FLOODING IN OR AROUND THE WALKER-COLEVILLE AREA AND ALONG HIGHWAY 395 SOUTH OF TOPAZ AND NEAR THE WALKER RIVER CANYON. FLOODING IS OCCURRING OR IS IMMINENT. IT IS IMPORTANT TO KNOW WHERE YOU ARE RELATIVE TO STREAMS...RIVERS...OR CREEKS WHICH CAN BECOME KILLERS IN HEAVY RAINS. CAMPERS AND HIKERS SHOULD AVOID STREAMS OR CREEKS. IN HILLY TERRAIN THERE ARE MANY LOW WATER CROSSINGS WHICH ARE POTENTIALLY DANGEROUS IN HEAVY RAIN. DO NOT ATTEMPT TO TRAVEL ACROSS FLOODED ROADS. FIND ALTERNATE ROUTES. IT TAKES ONLY A FEW INCHES OF SWIFTLY FLOWING WATER TO CARRY VEHICLES AWAY. LAT...LON 3859 11956 3862 11946 3852 11932 3837 11951 $$ HOON
3 follow-up statements
464 WGUS75 KREV 300000 FFSREV FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE RENO NV 500 PM PDT FRI JUL 29 2011 CAC051-300245- /O.CON.KREV.FF.W.0004.000000T0000Z-110730T0245Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ MONO CA- 500 PM PDT FRI JUL 29 2011 ...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 745 PM PDT FOR NORTHWESTERN MONO COUNTY... AT 445 PM PDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO INDICATE A THUNDERSTORM PRODUCING FLASH FLOODING OVER THE WARNED AREA. LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO WALKER-COLEVILLE...WALKER RIVER CANYON...AND HIGHWAY 395 IN THAT VICINITY. DRAINAGES INCLUDED IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO MILL CREEK AND THE WEST FORK WALKER RIVER THROUGH THE WALKER RIVER CANYON. FLOODING IS OCCURRING OR IS IMMINENT. IT IS IMPORTANT TO KNOW WHERE YOU ARE RELATIVE TO STREAMS...RIVERS...OR CREEKS WHICH CAN BECOME KILLERS IN HEAVY RAINS. CAMPERS AND HIKERS SHOULD AVOID STREAMS OR CREEKS. IN HILLY TERRAIN THERE ARE MANY LOW WATER CROSSINGS WHICH ARE POTENTIALLY DANGEROUS IN HEAVY RAIN. DO NOT ATTEMPT TO TRAVEL ACROSS FLOODED ROADS. FIND ALTERNATE ROUTES. IT TAKES ONLY A FEW INCHES OF SWIFTLY FLOWING WATER TO CARRY VEHICLES AWAY. LAT...LON 3859 11956 3862 11946 3852 11932 3837 11951 $$ HOON
848 WGUS75 KREV 300122 FFSREV FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE RENO NV 622 PM PDT FRI JUL 29 2011 CAC051-300245- /O.CON.KREV.FF.W.0004.000000T0000Z-110730T0245Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ MONO CA- 622 PM PDT FRI JUL 29 2011 ...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 745 PM PDT FOR NORTHWESTERN MONO COUNTY... AT 600 PM PDT...LOCAL LAW ENFORCEMENT OFFICIALS REPORTED A THUNDERSTORM PRODUCING FLASH FLOODING OVER THE WARNED AREA. THERE ARE REPORTS OF FLASH FLOODING CAUSING ROCKS TO COME DOWN ONTO HIGHWAY 395 IN THE WALKER RIVER CANYON. RAIN CONTINUES TO FALL IN THE AREA...ALTHOUGH SHOULD BE LETTING UP OVER THE NEXT HOUR OR SO. LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO WALKER-COLEVILLE AND THE WALKER RIVER CANYON. IN HILLY TERRAIN THERE ARE MANY LOW WATER CROSSINGS WHICH ARE POTENTIALLY DANGEROUS IN HEAVY RAIN. DO NOT ATTEMPT TO TRAVEL ACROSS FLOODED ROADS. FIND ALTERNATE ROUTES. IT TAKES ONLY A FEW INCHES OF SWIFTLY FLOWING WATER TO CARRY VEHICLES AWAY. LAT...LON 3859 11956 3862 11946 3852 11932 3837 11951 $$ HOON
765 WGUS75 KREV 300237 FFSREV FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE RENO NV 737 PM PDT FRI JUL 29 2011 CAC051-300246- /O.EXP.KREV.FF.W.0004.000000T0000Z-110730T0245Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ MONO CA- 737 PM PDT FRI JUL 29 2011 ...THE FLASH FLOOD WARNING WILL EXPIRE AT 745 PM PDT FOR NORTHWESTERN MONO COUNTY... THE STORMS THAT EARLIER PROMPTED THE FLASH FLOOD WARNING HAVE DISSIPATED...WITH A DIMINISHING FLOOD THREAT. REMEMBER THAT MINOR FLOODING OF LOW SPOTS MAY CONTINUE FOR SEVERAL HOURS. LAT...LON 3859 11956 3862 11946 3852 11932 3837 11951 $$ HOON
The office that day
Everything else NWS Reno, NV issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 29, 3:17 PM PDT | Special Weather Statement | REV | Mono | 3 hr |
Nearby
Flash Flood Warnings in California, 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.