Alert archive / California / Flash Flood Warnings in 2015
Flash Flood Warning 39, NWS Reno, NV
NWS Reno, NV issued this flash flood warning at Jul 8, 2015, 1:51 PM PDT for Nevada County, Sierra County, California. It was in force for 3 hr. No storm report in the archive falls inside the area while it was in force.
The area
The outline as issued.
The facts
- Issued
- Jul 8, 2015, 1:51 PM PDT (20:51 UTC)
- Expired
- Jul 8, 2015, 4:45 PM PDT
- In force
- 3 hr
- Issued by
- NWS Reno, NV
- Area
- Storm-based polygon
- Flood severity
- None
Counties Nevada County, CA, Sierra County, CA
The radar
The Reno radar (KRGX), 81 km from the middle of the area, began a volume at 20:53 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.
The nearest sounding before it
Reno, NV (KREV), launched 12:00Z, 8.9 hours before the alert went out and 185 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
- 6 J/kg
- Mixed-layer CIN
- -244 J/kg
- Mixed-layer LCL
- 1248 m above ground
- 0-6 km bulk shear
- 22 kt
- 0-1 km storm-relative helicity
- 28 m²/s²
- 0-3 km storm-relative helicity
- 107 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
942
WGUS55 KREV 082051
FFWREV
CAC057-091-082345-
/O.NEW.KREV.FF.W.0039.150708T2051Z-150708T2345Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE RENO NV
151 PM PDT WED JUL 8 2015
THE NATIONAL WEATHER SERVICE IN RENO HAS ISSUED A
* FLASH FLOOD WARNING FOR...
NEVADA COUNTY IN NORTHERN CALIFORNIA...
SIERRA COUNTY IN NORTHERN CALIFORNIA...
* UNTIL 445 PM PDT
* AT 148 PM PDT...DOPPLER RADAR INDICATED CLUSTERS OF THUNDERSTORMS
PRODUCING HEAVY RAIN ACROSS EASTERN SIERRA AND EASTERN NEVADA
COUNTIES. THESE STORMS ARE EXPECTED TO CONTINUE THROUGH AT LEAST
3 PM. FLASH FLOODING IS OCCURRING OR EXPECTED TO BEGIN SHORTLY.
* THESE STORMS ARE IMPACTING MANY AREAS ALONG HIGHWAY 89 FROM NEAR
TRUCKEE TO SIERRAVILLE TO CALPINE. FLASH FLOODING IS LIKELY IN LOW
SPOTS AND IN STEEP TERRAIN. ROCK SLIDES ARE ALSO POSSIBLE. DO NOT
DRIVE THROUGH FLOODED ROADS.
* THESE STORMS ARE PRODUCING LARGE AMOUNTS OF SMALL HAIL AS WELL.
THIS MAY RESULT IN SLICK ROADS.
* SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
SIERRAVILLE...BOCA RESERVOIR...STAMPEDE RESERVOIR...PROSSER CREEK
RESERVOIR...INDEPENDENCE LAKE...CALPINE...SATTLEY...
GLENSHIRE-DEVONSHIRE CDP...TRUCKEE.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
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.
MOVE TO HIGHER GROUND NOW. ACT QUICKLY TO PROTECT YOUR LIFE.
&&
LAT...LON 3970 12040 3950 12011 3932 12007 3932 12031
3939 12036 3945 12038 3949 12044 3953 12043
3961 12047 3966 12055
$$
CS4 follow-up statements
631
WGUS75 KREV 082119
FFSREV
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE RENO NV
219 PM PDT WED JUL 8 2015
CAC057-091-082345-
/O.CON.KREV.FF.W.0039.000000T0000Z-150708T2345Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
NEVADA CA-SIERRA CA-
219 PM PDT WED JUL 8 2015
...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 445 PM PDT FOR
NEVADA AND SIERRA COUNTIES...
* AT 216 PM PDT...DOPPLER RADAR INDICATED CLUSTERS OF THUNDERSTORMS
PRODUCING HEAVY RAIN FROM NEAR BOCA AND STAMPEDE TO SIERRAVILLE.
THESE STORMS WERE MOVING SLOWLY TO THE NORTHWEST AT 10-15 MPH.
FLASH FLOODING IS OCCURRING OR EXPECTED TO BEGIN SHORTLY.
* THESE STORMS ARE ALSO PRODUCING LARGE AMOUNTS OF SMALL HAIL, WHICH
CAN COVER ROADWAYS QUICKLY RESULTING IN WINTER-LIKE DRIVING
CONDITIONS. THIS COULD IMPACT I-80 EAST OF TRUCKEE TO THE NEVADA
STATE LINE, AND HIGHWAY 89 NORTH OF TRUCKEE.
* WE JUST RECEIVED A REPORT OF 2 INCHES OF SMALL HAIL ACCUMULATION
ALONG HIGHWAY 89 NORTH OF TRUCKEE. NEAR PROSSER CREEK CROSSING.
* SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
SIERRAVILLE...BOCA RESERVOIR...STAMPEDE RESERVOIR...PROSSER CREEK
RESERVOIR...INDEPENDENCE LAKE...CALPINE...SATTLEY... GLENSHIRE-
DEVONSHIRE CDP...TRUCKEE.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
MOST FLOOD DEATHS OCCUR IN AUTOMOBILES. NEVER DRIVE YOUR VEHICLE INTO
AREAS WHERE THE WATER COVERS THE ROADWAY. FLOOD WATERS ARE USUALLY
DEEPER THAN THEY APPEAR. A FEW INCHES OF FAST FLOWING WATER IS
POWERFUL ENOUGH TO SWEEP VEHICLES OFF THE ROAD.
&&
LAT...LON 3970 12040 3950 12011 3932 12007 3932 12031
3939 12036 3945 12038 3949 12044 3953 12043
3961 12047 3966 12055
$$
CS860
WGUS75 KREV 082148
FFSREV
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE RENO NV
248 PM PDT WED JUL 8 2015
CAC057-091-082345-
/O.CON.KREV.FF.W.0039.000000T0000Z-150708T2345Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
NEVADA CA-SIERRA CA-
248 PM PDT WED JUL 8 2015
...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 445 PM PDT FOR
NEVADA AND SIERRA COUNTIES...
* PRIMARY FLASH FLOOD THREAT MOVING INTO THE LOYALTON AREA OF SIERRA
COUNTY.
* AT 250 PM PDT...DOPPLER RADAR INDICATED CLUSTERS OF THUNDERSTORMS
PRODUCING HEAVY RAIN FROM NEAR STAMPEDE TO LOYALTON. THESE STORMS
WERE MOVING SLOWLY TO THE NORTHWEST AT 10-15 MPH. FLASH FLOODING
IS OCCURRING OR EXPECTED TO BEGIN SHORTLY.
* THESE STORMS ARE ALSO PRODUCING STRONG GUSTY WINDS AND LARGE
AMOUNTS OF SMALL HAIL, WHICH CAN COVER ROADWAYS QUICKLY RESULTING
IN WINTER-LIKE DRIVING CONDITIONS. THIS COULD IMPACT I-80 EAST OF
TRUCKEE TO THE NEVADA STATE LINE, HIGHWAY 89 NORTH OF TRUCKEE, AND
HIGHWAY 49 NEAR LOYALTON.
* EXPECT PONDING WATER ON ROADWAYS, AND FLASH FLOODING IN LOW SPOTS
AND STEEP TERRAIN. DO NOT DRIVE INTO AREAS WHERE WATER COVERS THE
ROADWAY.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
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 3970 12040 3950 12011 3932 12007 3932 12031
3939 12036 3945 12038 3949 12044 3953 12043
3961 12047 3966 12055
$$
CS053
WGUS75 KREV 082226
FFSREV
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE RENO NV
326 PM PDT WED JUL 8 2015
CAC057-091-082345-
/O.CON.KREV.FF.W.0039.000000T0000Z-150708T2345Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
NEVADA CA-SIERRA CA-
326 PM PDT WED JUL 8 2015
...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 445 PM PDT FOR
NEVADA AND SIERRA COUNTIES...
* AT 324 PM PDT...DOPPLER RADAR INDICATED THUNDERSTORMS PRODUCING
MODERATE TO HEAVY RAIN ACROSS MUCH OF EASTERN SIERRA AND EASTERN
NEVADA COUNTIES. FLASH FLOODING IS OCCURRING OR EXPECTED TO BEGIN
SHORTLY.
* THESE STORMS WILL PRODUCE ENOUGH RAINFALL TO CONTINUE THE THREAT
OF FLASH FLOODING. AREAS ALONG HIGHWAY 89 NORTH OF TRUCKEE TO NEAR
SIERRAVILLE, ESPECIALLY IN LOW SPOTS AND NEAR CREEKS, ARE AT
HIGHEST RISK OF FLASH FLOODING. DO NOT DRIVE INTO FLOODED AREAS.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
REPORT SEVERE WEATHER OR FLOODING BY POSTING ON OUR FACEBOOK OR
TWITTER. SEARCH FOR 'NWS RENO'. PICTURES AND VIDEOS ARE VERY HELPFUL.
&&
LAT...LON 3970 12040 3950 12011 3932 12007 3932 12031
3939 12036 3945 12038 3949 12044 3953 12043
3961 12047 3966 12055
$$
CS297
WGUS75 KREV 082336
FFSREV
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE RENO NV
436 PM PDT WED JUL 8 2015
CAC057-091-082344-
/O.CAN.KREV.FF.W.0039.000000T0000Z-150708T2345Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
NEVADA CA-SIERRA CA-
436 PM PDT WED JUL 8 2015
...THE FLASH FLOOD WARNING FOR NEVADA AND SIERRA COUNTIES IS
CANCELLED...
* HEAVY RAINS ARE LIFTING NORTH OF THE AREA. THE HIGH RISK OF FLASH
FLOODING HAS ENDED, HOWEVER SOME PONDING WATER REMAINS POSSIBLE.
LIGHT TO MODERATE SHOWERS WILL CONTINUE ON AND OFF THROUGH THE
EVENING HOURS.
LAT...LON 3970 12040 3950 12011 3932 12007 3932 12031
3939 12036 3945 12038 3949 12044 3953 12043
3961 12047 3966 12055
$$
CSThe office that day
Everything else NWS Reno, NV issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 7, 5:55 PM PDT | Areal Flood Advisory | REV | Alpine | 3 hr |
| Jul 7, 10:04 PM PDT | Flash Flood Watch | REV | Alpine, El Dorado, Lassen, Modoc, Mono, Nevada and 3 more | 23 hr |
| Jul 8, 11:30 AM PDT | Special Weather Statement | REV | Alpine | 45 min |
| Jul 8, 12:22 PM PDT | Special Weather Statement | REV | Alpine, Mono | 53 min |
| Jul 8, 12:38 PM PDT | Flash Flood Warning | REV | Alpine, Mono | 3 hr |
| Jul 8, 12:41 PM PDT | Severe Thunderstorm Warning | REV | Alpine, El Dorado, Placer | 49 min |
| Jul 8, 1:02 PM PDT | Severe Thunderstorm Warning | REV | Plumas | 28 min |
| Jul 8, 1:09 PM PDT | Special Weather Statement | REV | Sierra | 51 min |
| Jul 8, 1:36 PM PDT | Special Weather Statement | REV | Sierra | 24 min |
| Jul 8, 1:37 PM PDT | Flash Flood Warning | REV | Alpine | 3 hr |
| Jul 8, 1:48 PM PDT | Flash Flood Warning | REV | Mono | 3 hr |
| Jul 8, 1:58 PM PDT | Severe Thunderstorm Warning | REV | Plumas | 47 min |
| Jul 8, 2:04 PM PDT | Special Weather Statement | REV | Plumas | 26 min |
| Jul 8, 3:06 PM PDT | Severe Thunderstorm Warning | REV | Lassen, Sierra | 39 min |
| Jul 8, 3:10 PM PDT | Special Weather Statement | REV | Lassen | 50 min |
| Jul 8, 4:01 PM PDT | Special Weather Statement | REV | Lassen | 44 min |
| Jul 8, 4:24 PM PDT | Severe Thunderstorm Warning | REV | Lassen | 36 min |
Nearby
Flash Flood Warnings in California, 2015Every flash flood warning in 2015
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; radar from the NEXRAD Level II archive.