Alert archive / Nevada / Flash Flood Warnings in 2003

Flash Flood Warning 6, NWS Elko, NV

July 31, 2003Eureka County, Nevada

NWS Elko, NV issued this flash flood warning at Jul 31, 2003, 6:30 PM PDT for Eureka County, Nevada. It was in force for 90 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 31, 2003, 6:30 PM PDT (01:30 UTC)
Expired
Jul 31, 2003, 8:00 PM PDT
In force
90 min
Issued by
NWS Elko, NV
Area
Counties, with a storm outline in the text

County Eureka County, NV

Did it verify

Not verified. The Iowa Environmental Mesonet's Cow found no qualifying storm report inside this flash flood warning while it was in force. That is not proof nothing happened: reports are thin where few people live.

Cow counts a report within 15 km of the polygon while the warning was in force: a tornado for a tornado warning; hail of 1 inch or more, a gust of 58 mph or more or wind damage for a severe thunderstorm warning; a flash flood report for a flash flood warning.

The nearest sounding before it

Reno, NV (KREV), launched 00:00Z, 1.5 hours before the alert went out and 184 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 2003-08-01Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 196 joules per kilogram.LCLLFCEL10008507005003002001001 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 2003-08-01The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 237 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
196 J/kg
Mixed-layer CIN
-152 J/kg
Mixed-layer LCL
2429 m above ground
0-6 km bulk shear
47 kt
0-1 km storm-relative helicity
237 m²/s²
0-3 km storm-relative helicity
347 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.2

Open this sounding in Storm Lab

The text

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

000 
WGUS55 KLKN 010132
FFWLKN
NVC011-010300-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE ELKO NV
630 PM PDT THU JUL 31 2003

THE NATIONAL WEATHER SERVICE HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  SOUTHEASTERN EUREKA COUNTY IN NEVADA
  THIS INCLUDES THE CITIES OF...EUREKA AIRPORT...EUREKA

* UNTIL 800 PM PDT

* AT 624 PM PDT...THE EUREKA SHERIFFS OFFICS REPORTED VERY HEAVY 
RAIN OVER EUREKA WITH VISIBILITIES REDUCED TO 100 FEET. THE AREA OF 
HEAVY RAIN WAS NEARLY STATIONARY.

* THE THUNDERSTORM WITH EXCESSIVE RAINFALL WILL REMAIN OVER...EUREKA 
AND DEVILS GATE THROUGH 800 PM PDT

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 ATTEMPT TO CROSS SWIFTLY FLOWING WATERS OR WATERS OF UNKNOWN 
DEPTH BY FOOT OR BY AUTOMOBILE. IF YOUR VEHICLE STALLS, ABANDON IT 
IMMEDIATELY AND SEEK HIGHER GROUND.

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

LAT...LON 3964 11615 3947 11619 3940 11592 3961 11583

$$

JHW

What forecasters said that day

The local office's own words before this flash flood warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Elko, NV wrote its last area forecast discussion before this flash flood warning went out at Jul 31, 2:00 PM PDT, 4 hours 30 minutes earlier.

Area forecast discussion, Jul 31, 2:00 PM PDT, 4 hours 30 minutes before
NORTHERN GREAT BASIN FORECAST DISCUSSION
200 PM PDT THU JUL 31 2003

.SYNOPSIS...THE COMBINATION OF A LOW PRESSURE SYSTEM ALONG THE
PACIFIC COAST AND HIGH PRESSURE OVER THE FOUR CORNERS AREA WILL
ALLOW MOISTURE TO SPREAD ACROSS EAST CENTRAL AND NORTHEAST NEVADA
THROUGH THIS WEEKEND. EARLY NEXT WEEK INCREASING SOUTHWEST FLOW
ALOFT WILL BRING DRIER CONDITIONS TO NORTHEAST AND EAST CENTRAL
NEVADA.

.SHORT TERM...THUNDERSTORM ACTIVITY INCREASING THIS AFTERNOON WITH
GOES PW OF 1.4 INCHES OVER SRN NV AND .95 INCHES OVER EAST CENTRAL
NV. WOULD LIKE TO SEE WIDESPREAD ACTIVITY TO INCREASE CONFIDENCE
IN CURRENT WATCH. BUT THERE REMAINS PLENTY OF TIME TO DEVELOP...SO
WILL CONTINUE FLASH FLOOD WATCH. FRI SHOULD SEE CONVECTION SPREAD
FURTHER NORTH AS RIDGE AXIS SHIFTS E AND SLY FLOW ALLOWS S/WV TROF
TO MIGRATE ACROSS CWA. PAC TROF MOVES INLAND ON SAT WITH MAIN
INSTABILITY AREA SHIFTING OVER NE NV. ADDED SUPPORT FROM RRQ OF SLY
JET WILL HELP MAINTAIN CONVECTION THRU SAT EVE.

.EXTENDED...ON SUN AVN INDICATES AMS DRIES AND BECOMES LESS
UNSTABLE...ALTHO AVN LI STILL NEAR ZERO OVER CWA. GENERAL DRYING
TREND INDICATED OVER REMAINDER OF WEEK IN SW FLOW ALOFT. AM CONCERNED
ABOUT ERN PAC TROF ATTEMPTING TO ROTATE INLAND ON THU. UNTIL WE HAVE
BETTER HANDLE ON THIS SYS WILL KEEP DRY FCST FOR WED AND THU.

.EKO...NVZ035-037 FLASH FLOOD WATCH CONTINUES THROUGH 1030 PM PDT.

EYSSAUTIER
Hazardous weather outlook, Jul 31, 1:30 PM PDT, 5 hours before
NVZ030>037-011400-

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE ELKO NV
130 PM PDT THU JUL 31 2003

THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTHEAST AND EAST CENTRAL
NEVADA

.DAY ONE...

FLASH FLOOD WATCH IN EFFECT FORECAST CENTRAL NEVADA THIS
AFTERNOON AND EVENING. THE AFFECTED COUNTIES ARE WHITE PINE...
SOUTHERN LANDER AND SOUTHERN EUREKA. SHOWERS AND THUNDERSTORMS
WILL DEVELOP OVER EAST CENTRAL NEVADA THIS AFTERNOON WITH HEAVY
RAIN SHOWERS POSSIBLE LATE THIS AFTERNOON AND EVENING. SEE WGUS65
KLKN RNOFFALKN FOR DETAILS.

.DAYS TWO THROUGH SEVEN...

SCATTERED AFTERNOON AND EVENING THUNDERSTORMS WILL CONTINUE ACROSS
NORTHERN AND EAST CENTRAL NEVADA FRIDAY AND SATURDAY...DIMINISHING
EARLY NEXT WEEK.

.SPOTTER INFORMATION STATEMENT...

WEATHER SPOTTERS ARE ENCOURAGED TO REPORT SIGNIFICANT WEATHER
CONDITIONS ACCORDING TO STANDARD OPERATING PROCEDURES.

EYSSAUTIER

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 31, 5:31 PM PDTFlash Flood WarningLKNWhite Pine89 min
Jul 31, 7:02 PM PDTFlash Flood WarningLKNWhite Pine88 min
Jul 31, 8:00 PM PDTFlash Flood WarningLKNEureka, White Pine3 hr

Nearby

Flash Flood Warnings in Nevada, 2003Every 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.