Alert archive / Nevada / Flash Flood Warnings in 2003

Flash Flood Warning 8, NWS Elko, NV

July 31, 2003Eureka County, White Pine County, Nevada

NWS Elko, NV issued this flash flood warning at Jul 31, 2003, 8:00 PM PDT for Eureka County, White Pine County, Nevada. 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: Jul 31, 2003, 8:00 PM PDT (03:00 UTC)
Expired: Jul 31, 2003, 10:30 PM PDT
In force: 3 hr
Issued by: NWS Elko, NV
Area: Counties, with a storm outline in the text

Counties Eureka County, NV, White Pine 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

Elko, NV (KLKN), launched 00:00Z, 3.0 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-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: 81 J/kg
Mixed-layer CIN: -62 J/kg
Mixed-layer LCL: 3778 m above ground
0-6 km bulk shear: 4 kt
0-1 km storm-relative helicity: 4 m²/s²
0-3 km storm-relative helicity: 39 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 KLKN 010259
FFWLKN
NVC011-033-010530-

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

THE NATIONAL WEATHER SERVICE EXTENDS THE 

* FLASH FLOOD WARNING FOR...
  SOUTHERN EUREKA COUNTY AND 
  WHITE PINE COUNTY IN NEVADA

* UNTIL 1030 PM PDT

* AT 745 PM PDT...WEATHER SERVICE DOPPLER RADAR INDICATED VERY HEAVY 
RAIN ALONG AND SOUTH OF HIGHWAY 50...BETWEEN EUREKA AND ELY WITH THE 
HEAVIEST RAIN INDICATED ALONG THE EUREKA COUNTY AND WHITE PINE 
COUNTY BORDER. THESE STORMS ARE SLOW MOVING AND PRODUCING HEAVY 
RAIN. ADDITIONAL THUNDERSTORMS WITH HEAVY RAIN ARE DEVELOPING AND 
SLOWLY MOVING ACROSS WHITE PINE COUNTY AND THE GREAT BASIN NATIONAL 
PARK.

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

LAT...LON 3983 11625 3921 11646 3919 11587 3902 11404
          3966 11405

$$
EYSSAUTIER

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, 6 hours earlier.

Area forecast discussion, Jul 31, 2:00 PM PDT, 6 hours 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, 6 hours 30 minutes 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

In the hours before

Local storm report, Jul 31, 6:46 PM PDT, 1 hour 14 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE ELKO NV
0646 PM PDT THU JUL 31 2003

TIME(PDT)  .....CITY LOCATION.....STATE   ...EVENT/REMARKS...
           ....COUNTY LOCATION....

0530 PM    40 W ELY                  NV   FLASH FLOOD
07/31/03   WHITE PINE                     NHP REPORTED MUD...ROCKS
                                          AND TREES ACROSS LITTLE
                                          ANTELOPE SUMMIT ON U.S. 50.

0530 PM    BAKER                     NV   1.50 IN HEAVY RAIN
07/31/03   WHITE PINE                     FELL IN 35
                                          MINUTES...CREEKS ARE
                                          RUNNING FULL

0400 PM    6 W BAKER                 NV   FLASH FLOOD
07/31/03   WHITE PINE                     SOME MUD FLOWED ACROSS THE
                                          ROAD IN GREAT BASIN
                                          NATIONAL PARK.

JHW

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 31, 5:31 PM PDT	Flash Flood Warning	LKN	White Pine	89 min
Jul 31, 6:30 PM PDT	Flash Flood Warning	LKN	Eureka	90 min
Jul 31, 7:02 PM PDT	Flash Flood Warning	LKN	White Pine	88 min

Nearby

Flash Flood Warnings in Nevada, 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.