Alert archive / Oregon / Severe Thunderstorm Warnings in 2000
Severe Thunderstorm Warning 15, NWS Pendleton, OR
NWS Pendleton, OR issued this severe thunderstorm warning at Jul 18, 2000, 6:30 PM PDT for Jefferson County, Oregon. 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 counties it named.
The facts
- Issued
- Jul 18, 2000, 6:30 PM PDT (01:30 UTC)
- Expired
- Jul 18, 2000, 7:15 PM PDT
- In force
- 45 min
- Issued by
- NWS Pendleton, OR
- Area
- Whole counties
County Jefferson County, OR
The nearest sounding before it
Salem/Mcnary, OR (KSLE), launched 00:00Z, 1.5 hours before the alert went out and 148 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.
- Mixed-layer CAPE
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 1362 m above ground
- 0-6 km bulk shear
- 4 kt
- 0-1 km storm-relative helicity
- -13 m²/s²
- 0-3 km storm-relative helicity
- 9 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000 WUUS56 KPDT 190130 SVRPDT ORC031-190215- BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE PENDLETON OR 630 PM PDT TUE JUL 18 2000 THE NATIONAL WEATHER SERVICE IN PENDLETON HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... SOUTHEASTERN JEFFERSON IN NORTH CENTRAL OREGON * UNTIL 715 PM PDT * AT 626 PM PDT... DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM 10 MILES SOUTH OF MADRAS OR 8 MILES WEST OF GRIZZLY... MOVING EAST AT 10 MPH. * THIS STORM CAN BE EXPECTED IN THE VICINITY OF... GRIZZLY AROUND 707 PM PDT THIS IS A DANGEROUS STORM AND IS CAPABLE OF PRODUCING BRIEF HEAVY RAINFALL AND HAIL UP TO ONE INCH. STAY INDOORS AWAY FROM WINDOWS. STEVENS/EARLE
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, 2:10 PM PDT, 4 hours 20 minutes earlier.
Area forecast discussion, Jul 18, 2:10 PM PDT, 4 hours 20 minutes before
NORTHEAST OREGON/SOUTHEAST WASHINGTON FORECAST DISCUSSION NATIONAL WEATHER SERVICE PENDLETON OR 210 PM PDT TUE JUL 18 2000 FOUR CORNERS HIGH PRESSURE CONTINUES TO DOMINATE THE WEATHER PICTURE OVER OUR FORECAST AREA...AND THIS WILL REMAIN THE CASE FOR THE NEXT COUPLE OF DAYS. DIURNAL THUNDERSTORMS WILL CONTINUE TO BE A POSSIBILITY ESPECIALLY ACROSS CENTRAL OREGON AND OVER THE MOUNTAINS. 12Z PROG PACKAGES SHOW PLENTY OF INSTABILITY AND ENERGY WILL BE AVAILABLE FOR AFTERNOON/EVENING CONVECTIVE DEVELOPMENT IN THESE AREAS OVER THE NEXT COUPLE OF DAYS. PRECIPITABLE WATER VALUES OF BETWEEN 1/2 TO 1 INCH SUGGEST THAT ANY STORMS THAT DO DEVELOP WILL LIKELY BE WET. THICKNESS VALUES AND LOW-LEVEL TEMPERATURES WILL BE ON THE RISE THROUGH MID-WEEK AS THE FOUR-CORNERS HIGH RIDGES INTO THE PACIFIC NORTHWEST. THUS...WARMER TEMPERATURES (BOTH DAYTIME AND AT NIGHT) CAN BE EXPECTED. ISAACSON EXTENDED: THE UPPER RIDGE WILL CONTINUE TO DOMINATE THE WEATHER SCENE FRIDAY...WILL CONTINUE A CHANCE OF AFTERNOON SHOWERS AND THUNDERSTORMS MAINLY OVER THE MOUNTAINS DUE TO SOUTHWEST FLOW ALOFT. THE LONG RANGE MODELS VARY CONSIDERABLY REGARDING TIMING THE OFFSHORE TROUGH AS IT MOVES ONSHORE. WILL GO WITH INCREASING CHANCE OF CONVECTIVE ACTIVITY EACH DAY. THICKNESS VALUES AND THE FMR GUIDANCE INDICATE A WARMING TREND. FARMER PDT 2222 ALW 2222 PSC 1121 YKM 1111 .KPDT...WSR-88D...VCP21/CSR21...OPER7ATIONAL. .KPDT...NONE.
Nearby
Severe Thunderstorm Warnings in Oregon, 2000Every 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.