Alert archive / Nevada / Severe Thunderstorm Watches in 2000

Severe Thunderstorm Watch 644

August 3, 2000Elko County, Humboldt County, Pershing County, Nevada

The Storm Prediction Center issued this severe thunderstorm watch at Aug 3, 2000, 12:45 PM PDT for Elko County, Humboldt County, Pershing County, Nevada. It was in force for 5 hr.

The area

The outline as issued.

The facts

Issued: Aug 3, 2000, 12:45 PM PDT (19:45 UTC)
Expired: Aug 3, 2000, 6:00 PM PDT
In force: 5 hr
Issued by: the Storm Prediction Center

Counties Elko County, NV, Humboldt County, NV, Pershing County, NV

Warnings issued inside it

2 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.

Issued	Product	Office	Counties	Lasted
Aug 3, 3:19 PM PDT	Severe Thunderstorm Warning	LKN	Elko	41 min
Aug 3, 3:55 PM PDT	Severe Thunderstorm Warning	REV	Churchill, Pershing, Washoe	65 min

The nearest sounding before it

Reno, NV (KREV), launched 12:00Z, 7.8 hours before the alert went out and 199 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: 64 J/kg
Mixed-layer CIN: -237 J/kg
Mixed-layer LCL: 2445 m above ground
0-6 km bulk shear: 20 kt
0-1 km storm-relative helicity: 15 m²/s²
0-3 km storm-relative helicity: 7 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 
WWUS9 KMKC 031947
MKC WW 031945 COR
NVZ000-040100-

URGENT - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WATCH NUMBER 644
STORM PREDICTION CENTER NORMAN OK
1211 PM PDT THU AUG 3 2000

THE STORM PREDICTION CENTER HAS ISSUED A
SEVERE THUNDERSTORM WATCH FOR PORTIONS OF

   NORTHERN NEVADA                             

EFFECTIVE THIS THURSDAY AFTERNOON AND EVENING FROM 1245 PM UNTIL
600 PM PDT.

HAIL TO 1 INCH IN DIAMETER...THUNDERSTORM WIND GUSTS TO 70
MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS.

THE SEVERE THUNDERSTORM WATCH AREA IS ALONG AND 65 STATUTE MILES
NORTH AND SOUTH OF A LINE FROM 65 MILES WEST OF WINNEMUCCA NEVADA
TO 20 MILES NORTH OF WENDOVER UTAH.

REMEMBER...A SEVERE THUNDERSTORM WATCH MEANS CONDITIONS ARE
FAVORABLE FOR SEVERE THUNDERSTORMS IN AND CLOSE TO THE WATCH AREA. 
PERSONS IN THESE AREAS SHOULD BE ON THE LOOKOUT FOR THREATENING
WEATHER CONDITIONS AND LISTEN FOR LATER STATEMENTS AND POSSIBLE
WARNINGS.

OTHER WATCH INFORMATION...  CONTINUE...WW 642...WW 643...

DISCUSSION...THUNDERSTORMS DEVELOPING OVER CENTRAL NV IN RESPONSE
TO APPROACH OF MID LEVEL TROUGH ROTATING NWD AROUND UPPER HIGH. 
AIRMASS ACROSS NRN NEVADA MODERATELY UNSTABLE WITH CAPES TO 1500-
2000 J/KG COUPLED WITH STEEP LAPSE RATES...WIND DAMAGE POTENTIAL
WILL INCREASE AS STORMS PROPAGATE NWD ACROSS NRN NV DURING THE
AFTERNOON.


AVIATION...A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT
TO 1 INCH EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60 KNOTS. 
A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 500.  MEAN STORM MOTION
VECTOR 18020.


...HALES

;415,1190 415,1140 400,1140 400,1190;

N

Nearby

Severe Thunderstorm Watches in Nevada, 2000 Every severe thunderstorm watch in 2000

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.