Alert archive / Washington / Severe Thunderstorm Warnings in 2002

Severe Thunderstorm Warning 9, NWS Spokane, WA

July 13, 2002Pend Oreille County, Stevens County, Washington

NWS Spokane, WA issued this severe thunderstorm warning at Jul 13, 2002, 11:31 PM PDT for Pend Oreille County, Stevens County, Washington. It was in force for 19 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, 11:31 PM PDT (06:31 UTC)
Expired
Jul 13, 2002, 11:50 PM PDT
In force
19 min
Issued by
NWS Spokane, WA
Area
Counties, with a storm outline in the text

Counties Pend Oreille County, WA, Stevens County, WA

The nearest sounding before it

Spokane, WA (KOTX), launched 00:00Z, 6.5 hours before the alert went out and 154 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.

970 
WUUS56 KOTX 140631 CCA
SVROTX
WAC051-065-140700-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE SPOKANE WA
1126 PM PDT SAT JUL 13 2002

THE NATIONAL WEATHER SERVICE IN SPOKANE HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHWESTERN PEND OREILLE COUNTY IN NORTHEAST WASHINGTON
  NORTHEASTERN STEVENS COUNTY IN NORTHEAST WASHINGTON

* UNTIL 1150 PM PDT

* AT 1119 PM PDT...LOCAL LAW ENFORCEMENT OFFICIALS REPORTED POWER 
  LINES AND TREES BLOWN DOWN WITH A CLUSTER OF THUNDERSTORMS OVER 
  NORTH STEVENS AND PEND OREILLE COUNTY. THE GREATEST THREAT FOR 
  WINDS WILL OCCUR FROM NEAR METALINE FALLS...TO NORTHPORT. THESE 
  STORMS WILL MOVE AT 40 MPH...PRODUCING WINDS IN EXCESS OF 60 MPH.

* SEVERE THUNDERSTORMS WILL BE...
  FROM EAST OF NORTHPORT TO METALLINE FALLS AT 1126 PM PDT. 
 
LAT...LON 4880 11782 4868 11765 4870 11729 4899 11707           
   4901 11794

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 13, 5:30 PM PDTSevere Thunderstorm WarningOTXAsotin45 min
Jul 13, 11:22 PM PDTSevere Thunderstorm WarningOTXPend Oreille, Stevens28 min
Jul 14, 12:00 AM PDTSevere Thunderstorm WarningOTXPend Oreille30 min

Nearby

Severe 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.