Alert archive / Idaho / Severe Thunderstorm Warnings in 2002

Severe Thunderstorm Warning 7, NWS Spokane, WA

July 13, 2002Lewis County, Nez Perce County, Idaho; Asotin County, Washington

NWS Spokane, WA issued this severe thunderstorm warning at Jul 13, 2002, 5:30 PM PDT for Lewis County, Nez Perce County, Idaho; Asotin County, Washington. It was in force for 45 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
Jul 13, 2002, 5:30 PM PDT (00:30 UTC)
Expired
Jul 13, 2002, 6:15 PM PDT
In force
45 min
Issued by
NWS Spokane, WA
Area
Counties, with a storm outline in the text

Counties Lewis County, ID, Nez Perce County, ID, Asotin County, WA

The nearest sounding before it

Spokane, WA (KOTX), launched 00:00Z, 0.5 hours before the alert went out and 172 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 2002-07-14Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1234 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 2002-07-14The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 56 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
1234 J/kg
Mixed-layer CIN
-142 J/kg
Mixed-layer LCL
2917 m above ground
0-6 km bulk shear
31 kt
0-1 km storm-relative helicity
56 m²/s²
0-3 km storm-relative helicity
86 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.6

Open this sounding in Storm Lab

The text

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

167 
WUUS56 KOTX 140030
SVROTX
IDC061-069-WAC003-140115-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE SPOKANE WA
528 PM PDT SAT JUL 13 2002

THE NATIONAL WEATHER SERVICE IN SPOKANE HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTHWESTERN LEWIS COUNTY IN NORTH CENTRAL IDAHO
  WESTERN NEZ PERCE COUNTY IN NORTH CENTRAL IDAHO
  EASTERN ASOTIN COUNTY IN SOUTHEAST WASHINGTON
  THIS INCLUDES THE CITIES OF...LEWISTON...LAPWAI AND CLARKSTON

* UNTIL 615 PM PDT

* AT 518 PM PDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
  FROM 11 MILES SOUTHWEST OF ASOTIN TO 18 MILES SOUTH OF WAHA...OR
  FROM 14 MILES SOUTHWEST OF CLARKSTON TO 32 MILES SOUTH OF LAPWAI...
  MOVING NORTHEAST AT 25 MPH.

* SEVERE THUNDERSTORMS WILL BE NEAR...
   CLARKSTON HEIGHTS...ASOTIN...WAHA AT 545 PM PDT
   CLARKSTON AT 550 PM PDT
   LEWISTON AT 555 PM PDT
   WINCHESTER...LAPWAI AT 600 PM PDT

THIS SEVERE THUNDERSTORM WILL LIKELY PRODUCE DIME SIZE HAIL...AND
WINDS IN EXCESS OF 60 MPH.

IN ADDITION TO HAIL AND DAMAGING WINDS...FREQUENT CLOUD TO GROUND
LIGHTNING IS OCCURRING WITH THIS STORM. MOVE INDOORS IMMEDIATELY.
REMEMBER...IF YOU CAN HEAR THUNDER...YOU ARE CLOSE ENOUGH TO BE
STRUCK BY LIGHTNING.

LAT...LON 4631 11737 4586 11677 4603 11630 4649 11691

The office that day

Everything else NWS Spokane, WA issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jul 13, 11:22 PM PDTSevere Thunderstorm WarningOTXPend Oreille, Stevens28 min
Jul 13, 11:31 PM PDTSevere Thunderstorm WarningOTXPend Oreille, Stevens19 min
Jul 14, 12:00 AM PDTSevere Thunderstorm WarningOTXPend Oreille30 min

Nearby

Severe Thunderstorm Warnings in Idaho, 2002Severe Thunderstorm Warnings in Washington, 2002Every severe thunderstorm warning in 2002

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.