Alert archive / Nevada / Severe Thunderstorm Warnings in 2008

Severe Thunderstorm Warning 5, NWS Elko, NV

July 21, 2008Lander County, Nevada

NWS Elko, NV issued this severe thunderstorm warning at Jul 21, 2008, 1:50 PM PDT for Lander County, Nevada. It was in force for 25 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued
Jul 21, 2008, 1:50 PM PDT (20:50 UTC)
Expired
Jul 21, 2008, 2:15 PM PDT
In force
25 min
Issued by
NWS Elko, NV
Area
Storm-based polygon

County Lander County, NV

The radar

The Elko radar (KLRX), 92 km from the middle of the area, began a volume at 20:53 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

The nearest sounding before it

Reno, NV (KREV), launched 12:00Z, 8.8 hours before the alert went out and 107 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 12:00Z on 2008-07-21Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 26 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 12:00Z on 2008-07-21The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -21 square meters per square second.19395878Sfc1 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
26 J/kg
Mixed-layer CIN
-186 J/kg
Mixed-layer LCL
1658 m above ground
0-6 km bulk shear
30 kt
0-1 km storm-relative helicity
-21 m²/s²
0-3 km storm-relative helicity
58 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this severe thunderstorm 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 severe thunderstorm warning went out at Jul 21, 3:00 AM PDT, 10 hours 50 minutes earlier.

Area forecast discussion, Jul 21, 3:00 AM PDT, 10 hours 50 minutes before
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Hazardous weather outlook, Jul 21, 3:49 AM PDT, 10 hours 1 minute before
HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE ELKO NV
349 AM PDT MON JUL 21 2008

NVZ013-030>037-220000-
EXTREME EASTERN ELKO COUNTY-HUMBOLDT COUNTY-NORTHERN ELKO COUNTY-
NORTHERN LANDER AND NORTHERN EUREKA COUNTIES-NORTHERN NYE COUNTY-
RUBY MOUNTAINS/EAST HUMBOLDT RANGE-
SOUTHERN LANDER AND SOUTHERN EUREKA COUNTIES-
SOUTHWEST AND SOUTH CENTRAL ELKO COUNTY-WHITE PINE COUNTY-
349 AM PDT MON JUL 21 2008

THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTHERN AND CENTRAL NEVADA.

.DAY ONE...TODAY AND TONIGHT.

SHOWERS AND THUNDERSTORMS WILL REFORM OVER NORTHERN AND CENTRAL
NEVADA TODAY. ALONG WITH THE USUALLY GUSTY WINDS AND FREQUENT
LIGHTNING...THESE STORMS WILL HAVE THE POTENTIAL TO PRODUCE HEAVY
RAINFALLS. SLOW MOVING OR TRAINING STORM SYSTEMS WILL ALSO
BRING THE THREAT OF FLASH FLOODING. A FLASH FLOOD WATCH HAS BEEN
ISSUED FOR PORTIONS OF NORTHERN NEVADA...IN EFFECT FROM NOON TODAY
THROUGH MIDNIGHT. SHOWERS WILL DIMINISH FROM WEST TO EAST THIS
EVENING AND OVERNIGHT AS DRIER AIR MOVES IN FROM THE WEST.

.DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY.

A SLIGHT CHANCE OF AFTERNOON AND EVENING THUNDERSTORMS WILL LINGER
ACROSS PORTIONS OF CENTRAL AND EASTERN NEVADA THROUGH THE WEEK. THE
THREAT OF SHOWERS INCREASES A LITTLE MORE FRIDAY AND SATURDAY AS
ADDITIONAL MONSOON MOISTURE MOVES INTO CENTRAL AND EASTERN NEVADA.

.SPOTTER INFORMATION STATEMENT...

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

ROOD

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 21, 3:48 AM PDTFlash Flood WatchLKNElko, Eureka, Humboldt, Lander, White Pine20 hr
Jul 21, 2:09 PM PDTSevere Thunderstorm WarningLKNLander51 min
Jul 21, 2:40 PM PDTSevere Thunderstorm WarningLKNEureka35 min
Jul 21, 3:06 PM PDTSevere Thunderstorm WarningLKNEureka, Lander39 min
Jul 21, 3:16 PM PDTTornado WarningLKNEureka, Lander29 min
Jul 21, 3:39 PM PDTSevere Thunderstorm WarningLKNHumboldt36 min
Jul 21, 4:29 PM PDTSevere Thunderstorm WarningLKNElko31 min

Nearby

Severe Thunderstorm Warnings in Nevada, 2008Every severe thunderstorm warning in 2008

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; radar from the NEXRAD Level II archive.