Alert archive / California / Flash Flood Warnings in 2004

Flash Flood Warning 7, NWS Reno, NV

July 23, 2004Plumas County, California

NWS Reno, NV issued this flash flood warning at Jul 23, 2004, 6:34 PM PDT for Plumas County, California. It was in force for 86 min. 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 23, 2004, 6:34 PM PDT (01:34 UTC)
Expired
Jul 23, 2004, 8:00 PM PDT
In force
86 min
Issued by
NWS Reno, NV
Area
Counties, with a storm outline in the text

County Plumas County, CA

The radar

The Reno radar (KRGX), 81 km from the middle of the area, began a volume at 01:35 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, 1.6 hours before the alert went out and 191 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.

Skew-T log-pSkew-T log-p diagram, Reno, NV at 00:00Z on 2004-07-24Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 312 joules per kilogram.LCLEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Reno, NV at 00:00Z on 2004-07-24The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -16 square meters per square second.1939Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
312 J/kg
Mixed-layer CIN
-3 J/kg
Mixed-layer LCL
3908 m above ground
0-6 km bulk shear
3 kt
0-1 km storm-relative helicity
-16 m²/s²
0-3 km storm-relative helicity
16 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

000 
WGUS55 KREV 240135
FFWREV
CAC063-240330-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE RENO NV
634 PM PDT FRI JUL 23 2004

THE NATIONAL WEATHER SERVICE IN RENO HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  EAST CENTRAL PLUMAS COUNTY IN NORTHERN CALIFORNIA INCLUDING AREAS 
  WEST AND NORTHWEST OF FRENCHMANS LAKE

* UNTIL 800 PM PDT

* AT 630 PM PDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED   
  HEAVY RAINFALL AND POSSIBLE FLASH FLOODING FROM A STATIONARY       
  THUNDERSTORM OVER THE WARNED AREA.

.

EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF SMALL 
CREEKS AND STREAMS...AND RURAL ROADS.

LAT...LON 3989 12049 3987 12014 4006 12026 4010 12047

$$

GB

The office that day

Everything else NWS Reno, NV issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jul 23, 6:20 PM PDTFlash Flood WarningREVLassen85 min
Jul 24, 3:17 PM PDTSevere Thunderstorm WarningREVSierra43 min
Jul 24, 4:31 PM PDTSevere Thunderstorm WarningREVLassen, Plumas44 min

Nearby

Flash Flood Warnings in California, 2004Every flash flood warning in 2004

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.