Alert archive / Oregon / Severe Thunderstorm Warnings in 2000

Severe Thunderstorm Warning 14, NWS Pendleton, OR

July 18, 2000Deschutes County, Jefferson County, Oregon

NWS Pendleton, OR issued this severe thunderstorm warning at Jul 18, 2000, 1:23 PM PDT for Deschutes County, Jefferson County, Oregon. It was in force for 62 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: Jul 18, 2000, 1:23 PM PDT (20:23 UTC)
Expired: Jul 18, 2000, 2:25 PM PDT
In force: 62 min
Issued by: NWS Pendleton, OR
Area: Whole counties

Counties Deschutes County, OR, Jefferson County, OR

The nearest sounding before it

Salem/Mcnary, OR (KSLE), launched 12:00Z, 8.4 hours before the alert went out and 160 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 637 m above ground
0-6 km bulk shear: 6 kt
0-1 km storm-relative helicity: -43 m²/s²
0-3 km storm-relative helicity: -37 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.

000 
WUUS56 KPDT 182024
SVRPDT
ORC017-031-182125-
BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE PENDLETON OR
123 PM PDT TUE JUL 18 2000

THE NATIONAL WEATHER SERVICE IN PENDLETON HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  EXTREME NORTHERN DESCHUTES COUNTY IN CENTRAL OREGON
  EXTREME SOUTHERN JEFFERSON IN NORTH CENTRAL OREGON

* UNTIL 225 PM PDT

* AT 122 PM PDT... DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM 12
  MILES NORTHWEST OF REDMOND OR 8 MILES NORTHEAST OF SISTERS...
  MOVING EAST AT 5 MPH.

THIS STORM IS EXPECTED TO REMAIN IN RURAL AREAS.

THIS IS A DANGEROUS STORM! STAY INDOORS AWAY FROM WINDOWS.

DI/DH

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 18, 8:35 AM PDT, 4 hours 48 minutes earlier.

Area forecast discussion, Jul 18, 8:35 AM PDT, 4 hours 48 minutes before

NORTHEAST OREGON/SOUTHEAST WASHINGTON FORECAST DISCUSSION
NATIONAL WEATHER SERVICE PENDLETON OR
835 AM PDT TUE JUL 18 2000

CHANCES OF THUNDERSTORMS FOR THE NEXT TWO AFTERNOONS ARE THE MAIN
FORECAST CONCERNS. EARLY PREVIEW OF THE NEW 12Z PROG PACKAGES SHOW
PLENTY OF INSTABILITY AND ENERGY AVAILABLE ACROSS THE SOUTHERN AND
CENTRAL PORTIONS OF THE FORECAST AREA TODAY. WITH A MOSTLY CLEAR
START TO THE DAY...DAYTIME HEATING WILL COMBINE WITH THESE
INGREDIENTS FOR POSSIBLE CONVECTIVE DEVELOPMENT. MODELS SHOW
WEDNESDAY AFTERNOON TO BE EVEN MORE UNSTABLE THAN TODAY...SO
CONVECTION IS POSSIBLE ACROSS THOSE AREAS WEDNESDAY AFTERNOON AS
WELL. THE BASIN AREAS MAY SEE SOME CONVECTION STRAY IN FROM THE
SOUTH OVER THE NEXT COUPLE OF AFTERNOONS. PRECIPITABLE WATER VALUES
OF BETWEEN 1/2 TO 1 INCH SUGGESTS THAT ANY STORMS THAT DO DEVELOP
WILL BE WET.

NO CHANGES WILL BE MADE TO THE ON-GOING FORECAST PACKAGE THIS
MORNING.  ISAiACSON

PDT 221  ALW 221  PSC 110  YKM 010

.KPDT...WSR-88D...VCP21/CSR21...OPERATIONAL.

.KPDT...NONE.

Nearby

Severe Thunderstorm Warnings in Oregon, 2000 Every severe thunderstorm warning in 2000

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.