Alert archive / Washington / Severe Thunderstorm Warnings in 2004

Severe Thunderstorm Warning 13, NWS Spokane, WA

June 30, 2004Stevens County, Washington

NWS Spokane, WA issued this severe thunderstorm warning at Jun 30, 2004, 5:59 PM PDT for Stevens County, Washington. It was in force for 46 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
Jun 30, 2004, 5:59 PM PDT (00:59 UTC)
Expired
Jun 30, 2004, 6:45 PM PDT
In force
46 min
Issued by
NWS Spokane, WA
Area
Counties, with a storm outline in the text

County Stevens County, WA

The radar

The Spokane radar (KOTX), 43 km from the middle of the area, began a volume at 01:01 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

Spokane, WA (KOTX), launched 00:00Z, 1.0 hours before the alert went out and 101 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, Spokane, WA at 00:00Z on 2004-07-01Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 407 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, Spokane, WA at 00:00Z on 2004-07-01The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -13 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
407 J/kg
Mixed-layer CIN
-23 J/kg
Mixed-layer LCL
1928 m above ground
0-6 km bulk shear
24 kt
0-1 km storm-relative helicity
-13 m²/s²
0-3 km storm-relative helicity
44 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.4

Open this sounding in Storm Lab

The text

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

000 
WUUS56 KOTX 010059
SVROTX
WAC065-010145-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE SPOKANE WA
557 PM PDT WED JUN 30 2004

THE NATIONAL WEATHER SERVICE IN SPOKANE HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTHEASTERN STEVENS COUNTY IN NORTHEAST WASHINGTON

* UNTIL 645 PM PDT

* AT 552 PM PDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING NICKEL SIZE HAIL.  THIS
  STORM WAS LOCATED NEAR CLAYTON...OR ABOUT 21 MILES NORTH OF        
  SPOKANE...AND MOVING NORTH AT 10 MPH. ANOTHER VERY                 
  STRONG THUNDERSTORM WAS LOCATED NEAR LOON LAKE.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
    TUM TUM BY 555 PM PDT
    CLAYTON BY 600 PM PDT
    LOON LAKE BY 625 PM PDT
    SPRINGDALE BY 635 PM PDT
    VALLEY BY 645 PM PDT

THIS IS A DANGEROUS STORM. IF YOU ARE IN ITS PATH...PREPARE
IMMEDIATELY FOR DAMAGING WINDS...DESTRUCTIVE HAIL...AND DEADLY CLOUD
TO GROUND LIGHTNING. PEOPLE OUTSIDE SHOULD MOVE TO A SHELTER...
PREFERABLY INSIDE A STRONG BUILDING BUT AWAY FROM WINDOWS.

LAT...LON 4806 11748 4806 11756 4790 11756 4787 11767
          4796 11771 4811 11784 4820 11787 4822 11769
          4826 11753

$$

FX

Nearby

Severe Thunderstorm Warnings in Washington, 2004Every severe thunderstorm warning in 2004

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.