Alert archive / California / Flash Flood Warnings in 2003

Flash Flood Warning 2, NWS Reno, NV

July 23, 2003Nevada County, California

NWS Reno, NV issued this flash flood warning at Jul 23, 2003, 3:00 PM PDT for Nevada County, California. It was in force for 2 hr. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: Jul 23, 2003, 3:00 PM PDT (22:00 UTC)
Expired: Jul 23, 2003, 5:00 PM PDT
In force: 2 hr
Issued by: NWS Reno, NV
Area: Whole counties

County Nevada County, CA

The nearest sounding before it

Oakland, CA (KOAK), launched 12:00Z, 10.0 hours before the alert went out and 215 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 2008 m above ground
0-6 km bulk shear: 21 kt
0-1 km storm-relative helicity: -24 m²/s²
0-3 km storm-relative helicity: 37 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 232202
FFWREV
CAC057-240000-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE RENO NV
300 PM PDT WED JUL 23 2003

THE NATIONAL WEATHER SERVICE HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  EASTERN NEVADA COUNTY IN CENTRAL CALIFORNIA
  THIS INCLUDES TRUCKEE AND BOCA RESEVOIR

* UNTIL 500 PM PDT

* AT 249 PM PDT...WEATHER SERVICE DOPPLER RADAR INDICATED VERY HEAVY
  RAIN OVER HIRSCHDALE...OR ABOUT 2 MILES SOUTH OF BOCA RESEVOIR...  
  REMAINING NEARLY STATIONARY.

* THE THUNDERSTORM WITH EXCESSIVE RAINFALL WILL REMAIN NEAR          
  HIRSCHDALE AND TRUCKEE THROUGH 330 PM PDT.

TORRENTIAL RAINFALL OF 1 TO 2 INCHES PER HOUR IS LIKELY WITH THIS 
STORM.

DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE
ROADWAY. THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO CROSS
SAFELY. VEHICLES CAUGHT IN RISING WATER SHOULD BE ABANDONED QUICKLY.
MOVE TO HIGHER GROUND.

TO REPORT DAMAGING WEATHER HAVE THE NEAREST LAW ENFORCEMENT AGENCY 
RELAY YOUR REPORT TO THE NATIONAL WEATHER SERVICE FORECAST OFFICE.

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 22, 5:26 PM PDT	Severe Thunderstorm Warning	REV	Plumas, Sierra	34 min
Jul 22, 6:40 PM PDT	Flash Flood Warning	REV	Lassen	35 min
Jul 23, 2:39 PM PDT	Severe Thunderstorm Warning	REV	Nevada	21 min
Jul 23, 2:56 PM PDT	Severe Thunderstorm Warning	REV	Nevada	34 min
Jul 23, 3:07 PM PDT	Severe Thunderstorm Warning	REV	Lassen	33 min
Jul 23, 3:20 PM PDT	Severe Thunderstorm Warning	REV	Placer	25 min
Jul 23, 4:39 PM PDT	Severe Thunderstorm Warning	REV	Lassen	26 min
Jul 23, 4:46 PM PDT	Flash Flood Warning	REV	Lassen	119 min
Jul 23, 4:59 PM PDT	Severe Thunderstorm Warning	REV	Lassen	31 min

Nearby

Flash Flood Warnings in California, 2003 Every flash flood warning in 2003

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.