Alert archive / California / Flash Flood Warnings in 2017
Flash Flood Warning 10, NWS Reno, NV
NWS Reno, NV issued this flash flood warning at Aug 8, 2017, 6:15 PM PDT for Plumas 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
- Aug 8, 2017, 6:15 PM PDT (01:15 UTC)
- Expired
- Aug 8, 2017, 9:15 PM PDT
- In force
- 3 hr
- Issued by
- NWS Reno, NV
- Area
- Storm-based polygon
- Flood severity
- None
County Plumas County, CA
The radar
The Reno radar (KRGX), 72 km from the middle of the area, began a volume at 01:15 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 00:00Z, 1.3 hours before the alert went out and 182 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
- 212 J/kg
- Mixed-layer CIN
- -13 J/kg
- Mixed-layer LCL
- 3011 m above ground
- 0-6 km bulk shear
- 11 kt
- 0-1 km storm-relative helicity
- -14 m²/s²
- 0-3 km storm-relative helicity
- 4 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
321
WGUS55 KREV 090115
FFWREV
CAC063-090415-
/O.NEW.KREV.FF.W.0010.170809T0115Z-170809T0415Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Reno NV
615 PM PDT TUE AUG 8 2017
The National Weather Service in Reno has issued a
* Flash Flood Warning for...
Plumas County in northern California...
* Until 915 PM PDT
* At 611 PM PDT, Doppler radar indicated thunderstorms producing
heavy rain across northeast Plumas County, mainly northwest of
Frenchman Lake in the drainages on either side of Dixie Mountain.
Doppler radar estimates 1 to 2 inches of rain has already fallen.
The storms are moving very slowly and reforming in the same area.
Flash flooding is expected to begin shortly. Small hail is also
likely in these storms.
* Flash flooding will remain over mainly rural areas of Plumas
County.
Additional rainfall amounts of 0.75 inches to 1 inch are possible in
the warned area.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
In hilly terrain there are hundreds of low water crossings which are
potentially dangerous in heavy rain. Do not attempt to cross flooded
roads. Find an alternate route.
&&
LAT...LON 3988 12021 3990 12032 3998 12034 4004 12031
4007 12024 4000 12020
$$2 follow-up statements
205
WGUS75 KREV 090143
FFSREV
Flash Flood Statement
National Weather Service Reno NV
643 PM PDT TUE AUG 8 2017
CAC063-090415-
/O.CON.KREV.FF.W.0010.000000T0000Z-170809T0415Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Plumas CA-
643 PM PDT TUE AUG 8 2017
...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 915 PM PDT FOR
PLUMAS COUNTY...
At 640 PM PDT, thunderstorms with heavy and some small hail continue
to develop over move over the area around Frenchman lake and Dixie
Mountain. Rainfall estimates from doppler radar indicate in excess
of 1.50 inches has fallen in the area between Frenchman Lake and
Dixie Mountain. Flash flooding is expected to begin shortly.
Flash flooding will remain over mainly rural areas of Plumas County.
Additional rainfall amounts of up to 1 inch of rain are possible in
the warned area as storms continue to redevelop and move over areas
that have already received heavy rain.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
In hilly terrain there are hundreds of low water crossings which are
potentially dangerous in heavy rain. Do not attempt to cross flooded
roads. Find an alternate route.
&&
LAT...LON 3988 12021 3990 12032 3998 12034 4004 12031
4007 12024 4000 12020
$$519
WGUS75 KREV 090257
FFSREV
Flash Flood Statement
National Weather Service Reno NV
757 PM PDT TUE AUG 8 2017
CAC063-090306-
/O.CAN.KREV.FF.W.0010.000000T0000Z-170809T0415Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Plumas CA-
757 PM PDT TUE AUG 8 2017
...THE FLASH FLOOD WARNING FOR PLUMAS COUNTY IS CANCELLED...
The heavy rain has ended and runoff from the storms should be
decreasing. Flooding is no longer expected to pose a threat.
LAT...LON 3988 12021 3990 12032 3998 12034 4004 12031
4007 12024 4000 12020
$$The office that day
Everything else NWS Reno, NV issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 8, 5:30 PM PDT | Special Weather Statement | REV | Plumas | 45 min |
| Aug 8, 8:49 PM PDT | Special Weather Statement | REV | Lassen | 116 min |
| Aug 9, 3:14 AM PDT | Flash Flood Watch | REV | Lassen, Modoc, Plumas, Sierra | 19 hr |
| Aug 9, 2:33 PM PDT | Areal Flood Advisory | REV | Sierra | 3 hr |
| Aug 9, 2:48 PM PDT | Special Weather Statement | REV | Alpine, Lassen | 57 min |
Nearby
Flash Flood Warnings in California, 2017Every flash flood warning in 2017
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.