Alert archive / Oregon / Severe Thunderstorm Warnings in 2002

Severe Thunderstorm Warning 21, NWS Pendleton, OR

July 14, 2002Union County, Oregon

NWS Pendleton, OR issued this severe thunderstorm warning at Jul 14, 2002, 6:19 PM PDT for Union County, Oregon. It was in force for 31 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 14, 2002, 6:19 PM PDT (01:19 UTC)
Expired
Jul 14, 2002, 6:50 PM PDT
In force
31 min
Issued by
NWS Pendleton, OR
Area
Counties, with a storm outline in the text

County Union County, OR

The nearest sounding before it

Boise Airport, ID (KBOI), launched 00:00Z, 1.3 hours before the alert went out and 201 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, Boise Airport, ID at 00:00Z on 2002-07-15Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 46 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, Boise Airport, ID at 00:00Z on 2002-07-15The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -176 square meters per square second.193958Sfc1 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
46 J/kg
Mixed-layer CIN
-525 J/kg
Mixed-layer LCL
2924 m above ground
0-6 km bulk shear
38 kt
0-1 km storm-relative helicity
-176 m²/s²
0-3 km storm-relative helicity
-150 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.

364 
WUUS56 KPDT 150119
SVRPDT
ORC061-150150-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE PENDLETON OR
615 PM PDT SUN JUL 14 2002

THE NATIONAL WEATHER SERVICE IN PENDLETON HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTHEASTERN UNION COUNTY IN NORTHEAST OREGON

* UNTIL 650 PM PDT

* AT 615 PM PDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM OVER HAINES IN NORTH CENTRAL BAKER COUNTY...OR 
  ABOUT 7 MILES SOUTHEAST OF NORTH POWDER IN UNION COUNTY...MOVING  
  NORTH AT 20 MPH.

* THE SEVERE THUNDERSTORM WILL BE...
  NEAR NORTH POWDER UNION COUNTY AT 640 PM PDT

LARGE HAIL...DAMAGING WINDS...AND BRIEF HEAVY RAINFALL ARE LIKELY 
WITH THIS STORM. TAKE COVER IN A STURDY BUILDING UNTIL THE STORM HAS 
PASSED.

LAT...LON 4489 11806 4476 11788 4506 11738 4524 11763

The office that day

Everything else NWS Pendleton, OR issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jul 14, 7:04 PM PDTSevere Thunderstorm WarningPDTGrant26 min
Jul 14, 7:52 PM PDTSevere Thunderstorm WarningPDTGrant23 min
Jul 14, 8:13 PM PDTSevere Thunderstorm WarningPDTGrant17 min

Nearby

Severe Thunderstorm Warnings in Oregon, 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.