Severe Thunderstorm Warning 23, NWS Elko, NV

NORTHERN GREAT BASIN FORECAST DISCUSSION
NATIONAL WEATHER SERVICE ELKO NV
851 AM PDT FRI AUG 22 2003

ACTIVE WEATHER DAY TODAY. WATER VAPOR IMAGERY SHOWING LOW OFF THE
CENTRAL CALIFORNIA COAST STARTING TO MOVE INLAND NEAR SFO. DRY AIR
MOVING INTO SOUTHERN NEVADA...BUT STILL DEEP OVER NORTHERN PORTIONS
OF THE STATE. 12Z LKN SOUNDING SHOWS LIS OF NEG 4.5 WITH SOME DRYING
ALOFT NEAR 20K FT. SO...BOTH MODELS ARE UNDERESTIMATING THE
INSTABILITY OVER THE AREA. CONVERGENCE ZONE SET UP CURRENTLY SET UP
OVER NORTH CENTRAL ELKO...SOUTHWEST TO NORTHERN LANDER COUNTY. ETA
KEEPS THIS BOUNDARY IN THE SAME GENERAL LOCATION FOR MOST OF THE
MORNING AND AFTERNOON AND THEN SLOWLY EASTWARD THIS EVENING UNTIL
ABOUT 12Z SATURDAY MORNING. JET ASSOCIATED WITH CALIFORNIA LOW STARTS
MAKING ITS WAY INTO OUR FORECAST AREA THIS AFTERNOON. ALL THIS
SUPPORTS OUR CURRENT FORECAST OF HEAVY PRECIPITATION AND SOME SEVERE
THUNDERSTORMS. MOST OF THE SEVERE THUNDERSTORMS SHOULD BE
CONCENTRATED ALONG THE CONVERGENCE BOUNDARY...AGAIN ALONG A LINE
FROM ROUGHLY JACKPOT SOUTHWEST TO MAYBE BATTLE MOUNTAIN. DRY AIR
INTRUSION THIS AFTERNOON WILL ONLY ENHANCE HAIL FORMATION. ZONE
FINALLY MOVES UP INTO EASTERN IDAHO TOMORROW MORNING WITH RAPID
DRYING. ONLY DISAGREEMENT WITH CURRENTLY PACKAGE IS THE BREEZY
WORDING IN THE FIRST PERIOD ACROSS THE NORTH. MOS GUIDANCE KEEPS
WINDS AROUND 10KTS OVER WMC AND EKO. SO WILL PROBABLY AMEND NORTHERN
ZONES TO DROP BREEZY WORDING. OTHERWISE MORNING PACKAGE LOOKS RIGHT
ON.

.EKO...NVZ030>037 FLASH FLOOD WATCH TODAY.

CLAYCOMB

NVZ030>037-231400-

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE ELKO NV
500 AM PDT FRI AUG 22 2003

THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTHEAST AND EAST CENTRAL
NEVADA

.DAY ONE...

MOISTURE COMBINED WITH STRONG WINDS IN THE UPPER LEVELS OF THE
ATMOSPHERE WILL CREATE FAVORABLE CONDITIONS FOR THUNDERSTORMS CAPABLE
OF PRODUCING HEAVY RAINS...STRONG WINDS...AND LARGE HAIL. A FLASH
FLOOD WATCH CONTINUES FOR NORTHEAST NEVADA TODAY. REFER TO AWIPS ID
RNOFFALKN...OR WMO HEADER WGUS65 KLKN FOR DETAILS.

.DAYS TWO THROUGH SEVEN...

MOISTURE WILL DEPART NORTHEAST NEVADA SATURDAY...WITH THE THREAT OF
SHOWERS AND THUNDERSTORMS DIMINISHING.

.SPOTTER INFORMATION STATEMENT...

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

ALLEN

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE ELKO, NV
900 AM PDT FRI AUG 22 2003

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

1207 PM    8 W ELKO                  NV   FLASH FLOODS
08/21/03   ELKO                           FLASH FLOODING AND
                                          MUDSLIDE CLOSED PORTIONS OF
                                          INTERSTATE 80 NEAR HUNTER
                                          EXIT, MILE MARKER 293.

0208 PM    CARLIN                    NV   FLASH FLOODS
08/21/03   EUREKA

PE

NVZ030>034-036-037-222315-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE ELKO NV
115 PM PDT FRI AUG 22 2003

...SEVERE THUNDERSTORM WATCH NUMBER 882 IN EFFECT FOR NORTHERN
NEVADA UNTIL 7 PM PDT...

THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM WATCH
FOR NORTHERN NEVADA INCLUDING THE FOLLOWING COUNTIES...

       HUMBOLDT...LANDER...EUREKA...ELKO AND NORTHWESTERN WHITE PINE.

THUNDERSTORMS WITH HEAVY RAIN...HALF INCH TO ONE INCH HAIL...AND
WIND GUSTS NEAR 60 MPH CAN BE EXPECTED THIS AFTERNOON AND EVENING
ACROSS NORTHERN AND NORTH EAST NEVADA UNTIL 7 PM PDT.

REMEMBER...A SEVERE THUNDERSTORM WATCH MEANS CONDITIONS ARE
FAVORABLE FOR SEVERE THUNDERSTORMS. IF YOU SEE A SEVERE THUNDERSTORM
TAKE SHELTER IMMEDIATELY.

CALL YOUR LOCAL LAW ENFORCEMENT AGENCY TO PASS ON REPORTS OF HEAVY
RAIN...HAIL...OR STRONG DAMAGING WINDS.

EYSSAUTIER