Alert archive / California / Flash Flood Warnings in 2001

Flash Flood Warning 4, NWS Reno, NV

July 10, 2001Mono County, California; Lyon County, Nevada

NWS Reno, NV issued this flash flood warning at Jul 10, 2001, 6:45 PM PDT for Mono County, California; Lyon County, Nevada. It was in force for 45 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline the Iowa Environmental Mesonet reconstructed for it; the warning itself named whole counties.

The facts

Issued: Jul 10, 2001, 6:45 PM PDT (01:45 UTC)
Expired: Jul 10, 2001, 7:30 PM PDT
In force: 45 min
Issued by: NWS Reno, NV
Area: Whole counties; the outline is the Mesonet’s reconstruction

Counties Mono County, CA, Lyon County, NV

The nearest sounding before it

Reno, NV (KREV), launched 00:00Z, 1.8 hours before the alert went out and 151 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: 42 J/kg
Mixed-layer CIN: -108 J/kg
Mixed-layer LCL: 2205 m above ground
0-6 km bulk shear: 38 kt
0-1 km storm-relative helicity: 148 m²/s²
0-3 km storm-relative helicity: 216 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 110146
FFWREV
CAC051-NVC019-110230-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE RENO NV
645 PM PDT TUE JUL 10 2001

THE NATIONAL WEATHER SERVICE HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  NORTHWESTERN MONO COUNTY IN CENTRAL CALIFORNIA
  SOUTH CENTRAL LYON COUNTY IN WESTERN NEVADA

* UNTIL 730 PM PDT

* AT 642 PM PDT...WEATHER SERVICE DOPPLER RADAR INDICATED VERY HEAVY
  RAIN 11 MILES SOUTH OF SWEETWATER SUMMIT...OR ABOUT 7 MILES NORTH
  OF BRIDGEPORT...MOVING NORTH AT 5 MPH.

EXCESSIVE RUNOFF FROM THIS STORM WILL CAUSE FLASH FLOODING OF CREEKS
AND STREAMS...ROADS AND ROADSIDE CULVERTS. THE HEAVY RAINS COULD ALSO
TRIGGER ROCK AND MUDSLIDES IN STEEP TERRAIN.

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 GROUNFD.

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

LAT...LON 3857 11924 3844 11939 3830 11921 3844 11903

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 10, 7:35 PM PDT	Flash Flood Warning	REV	Mono	40 min
Jul 11, 10:57 AM PDT	Severe Thunderstorm Warning	REV	Lassen, Plumas	33 min
Jul 11, 4:13 PM PDT	Severe Thunderstorm Warning	REV	Lyon, Storey	47 min
Jul 11, 4:47 PM PDT	Severe Thunderstorm Warning	REV	Churchill, Lyon	43 min
Jul 11, 4:50 PM PDT	Severe Thunderstorm Warning	REV	Washoe	40 min

Nearby

Flash Flood Warnings in California, 2001 Flash Flood Warnings in Nevada, 2001 Every flash flood warning in 2001

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.