Alert archive / Oregon / Severe Thunderstorm Warnings in 2002

Severe Thunderstorm Warning 38, NWS Pendleton, OR

July 24, 2002Wallowa County, Oregon

NWS Pendleton, OR issued this severe thunderstorm warning at Jul 24, 2002, 11:23 PM PDT for Wallowa County, Oregon. It was in force for 37 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 24, 2002, 11:23 PM PDT (06:23 UTC)
Expired: Jul 25, 2002, 12:00 AM PDT
In force: 37 min
Issued by: NWS Pendleton, OR
Area: Counties, with a storm outline in the text

County Wallowa County, OR

The radar

The Pendleton radar (KPDT), 101 km from the middle of the area, began a volume at 06:22 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.

Did it verify

Not verified. The Iowa Environmental Mesonet's Cow found no qualifying storm report inside this severe thunderstorm warning while it was in force. That is not proof nothing happened: reports are thin where few people live.

Cow counts a report within 15 km of the polygon while the warning was in force: a tornado for a tornado warning; hail of 1 inch or more, a gust of 58 mph or more or wind damage for a severe thunderstorm warning; a flash flood report for a flash flood warning.

The nearest sounding before it

Spokane, WA (KOTX), launched 00:00Z, 6.4 hours before the alert went out and 218 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 43 J/kg
Mixed-layer CIN: -27 J/kg
Mixed-layer LCL: 3515 m above ground
0-6 km bulk shear: 8 kt
0-1 km storm-relative helicity: -3 m²/s²
0-3 km storm-relative helicity: 2 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

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

898 
WUUS56 KPDT 250623
SVRPDT
ORC063-250700-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE PENDLETON OR
1122 PM PDT WED JUL 24 2002

THE NATIONAL WEATHER SERVICE IN PENDLETON HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHWESTERN WALLOWA COUNTY IN NORTHEAST OREGON

* UNTIL MIDNIGHT PDT

* AT 1122 PM PDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM 10 MILES SOUTHWEST OF PROMISE...OR ABOUT 32
  MILES NORTHWEST OF ENTERPRISE...MOVING NORTH AT 20 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  TROY AT 1140 PM PDT

LAT...LON 4592 11776 4573 11762 4599 11722 4601 11762

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 Pendleton, OR wrote its last area forecast discussion before this severe thunderstorm warning went out at Jul 24, 8:00 PM PDT, 3 hours 23 minutes earlier.

Area forecast discussion, Jul 24, 8:00 PM PDT, 3 hours 23 minutes before

NORTHEAST OREGON/SOUTHEAST WASHINGTON FORECAST DISCUSSION
NATIONAL WEATHER SERVICE PENDLETON OR
800 PM PDT WED JUL 24 2002

THUNDERSTORMS ARE DECREASING IN INTENSITY AS THE SUN SINKS BELOW THE
HORIZON.  HOWEVER...A VIGOROUS DISTURBANCE OVER SOUTHWEST OREGON
WILL MAKE ITS WAY THROUGH THE FORECAST AREA OVERNIGHT.  LIFT AND AN
UNSTABLE ATMOSPHERE WILL COMBINE TO PRODUCE ANOTHER ROUND OF
CONVECTION LATER TONIGHT.  THE STORMS ARE EXPECTED TO BE DRY OVER
PORTIONS OF THE COLUMBIA BASIN...BUT PRIMARILY WET ELSEWHERE.
CURRENT WATER VAPOR LOOP INDICATES DISTURBANCE MAY BE A LITTLE
FARTHER SOUTH THAN THE 00Z MODEL RUNS LOCATION.  THIS MAY KEEP MOST
OF THE ACTIVITY CONFINED TO THE OREGON SIDE.  MAIN TROUGH MOVES OVER
THE REGION THURSDAY FOR A SLIGHT CHANCE OF THUNDERSTORMS.  CURRENT
FORECAST HANDLE ABOVE SCENARIO WELL.  WILL UPDATE FORECAST AT 900 PM
TO REMOVE SEVERE THUNDERSTORM WATCH WORDING.  EARLE

PDT 3200  ALW 3300  PSC 3200   YKM 2200

KPDT...VCP21/PRECIP...OPERATIONAL.

.KPDT...RED FLAG WARNING FOR DRY LIGHTNING FOR TONIGHT FOR THE
        LOWER COLUMBIA BASIN AND THE FOOTHILLS OF THE BLUE MOUNTAINS.
        SEVERE THUNDERSTORM WATCH UNTIL 900 PM FOR PORTIONS OF
        NORTHEAST OREGON AND SOUTHEAST WASHINGTON.

In the hours before

Local storm report, Jul 24, 7:21 PM PDT, 4 hours 2 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE PENDLETON OREGON
721 PM PDT WED JUL 24 2002

TIME(PDT)  .....CITY LOCATION.....STATE   ...EVENT/REMARKS...
           ....COUNTY LOCATION....

0507 PM    KINZUA                    OR   1.25 INCH HAIL
07/24/02   WHEELER                        EVENT DURATION 10
                                          MINUTES. REPORTED BY
                                          STORM SPOTTER.

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 24, 5:06 PM PDT	Severe Thunderstorm Warning	PDT	Wheeler	24 min
Jul 24, 5:54 PM PDT	Severe Thunderstorm Warning	PDT	Gilliam	51 min

Nearby

Severe Thunderstorm Warnings in Oregon, 2002 Every 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; radar from the NEXRAD Level II archive.