Alert archive / Oregon / Severe Thunderstorm Warnings in 2000
Severe Thunderstorm Warning 2, NWS Portland, OR
NWS Portland, OR issued this severe thunderstorm warning at Oct 9, 2000, 7:15 PM PDT for Clackamas County, Multnomah 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 outline the Iowa Environmental Mesonet reconstructed for it; the warning itself named whole counties.
The facts
- Issued
- Oct 9, 2000, 7:15 PM PDT (02:15 UTC)
- Expired
- Oct 9, 2000, 8:00 PM PDT
- In force
- 45 min
- Issued by
- NWS Portland, OR
- Area
- Whole counties; the outline is the Mesonet’s reconstruction
Counties Clackamas County, OR, Multnomah County, OR
The radar
The Portland,OR radar (KRTX), 49 km from the middle of the area, began a volume at 02:17 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.
The nearest sounding before it
Salem/Mcnary, OR (KSLE), launched 00:00Z, 2.3 hours before the alert went out and 60 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
- 123 J/kg
- Mixed-layer CIN
- 0 J/kg
- Mixed-layer LCL
- 578 m above ground
- 0-6 km bulk shear
- 55 kt
- 0-1 km storm-relative helicity
- 185 m²/s²
- 0-3 km storm-relative helicity
- 214 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.4
The text
As transmitted, in the capitals the NWS used until 2016.
000 WUUS56 KPQR 100216 SVRPDX ORC005-051-100300- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE PORTLAND OR 715 PM PDT MON OCT 9 2000 THE NATIONAL WEATHER SERVICE IN PORTLAND HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... EXTREME NORTHWESTERN CLACKAMAS COUNTY IN NORTHWEST OREGON SOUTH CENTRAL MULTNOMAH COUNTY IN NORTHWEST OREGON * UNTIL 800 PM PDT * AT 715 PM PDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM OVER OREGON CITY...MOVING NORTH AT 10 MPH. * THE SEVERE THUNDERSTORM WILL BE NEAR... GLADSTONE AT 730 PM PDT JOHNSON CITY AT 735 PM PDT CLACKAMAS AT 740 PM PDT SUNNYSIDE AT 745 PM PDT HAPPY VALLEY AT 750 PM PDT THE NATIONAL WEATHER SERVICE HAS RECEIVED REPORTS OF DAMAGE FROM THIS STORM IN THE OREGON CITY AREA AND POSSIBLY IN THE MOLALLA AREA. THIS IS A DANGEROUS STORM...CAPABLE OF PRODUCING LARGE HAIL...DAMAGING WINDS IN EXCESS OF 55 MPH...AND DEADLY LIGHTNING. THIS STORM MAY ALSO PRODUCE A FUNNEL CLOUD. IF YOU ARE IN ITS PATH...TAKE COVER IN A STURDY STRUCTURE AWAY FROM WINDOWS UNTIL THE STORM HAS PASSED. LAT...LON 4530 12265 4529 12259 4546 12245 4549 12257
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 Portland, OR wrote its last area forecast discussion before this severe thunderstorm warning went out at Oct 9, 3:00 PM PDT, 4 hours 15 minutes earlier.
Area forecast discussion, Oct 9, 3:00 PM PDT, 4 hours 15 minutes before
NORTHWEST OREGON AND SOUTHWEST WASHINGTON FORECAST DISCUSSION NATIONAL WEATHER SERVICE PORTLAND OR 300 PM PDT MON OCT 9 2000 THE UPPER TROUGH CONTINUES TO DEEPEN TOWARD NORTHERN CALIFORNIA. FEEL AVIATION WILL CONTINUE TO BE BEST MODEL TO FOLLOW. RAIN WILL CHANGE TO SHOWERS OVERNIGHT. SNOW LEVEL AS LOW AS 5000 FEET BY LATE TONIGHT AND WILL CONTINUE SPECIAL WEATHER STATEMENT FOR SNOW IN THE CASCADES. THE MAIN UPPER LOW WILL TRACK THROUGH NORTHERN CALIFORNIA AND NORTHWEST NEVADA TONIGHT AND TUESDAY. SHOWERS WILL SLOWLY TAPER OFF FROM THE NORTHWEST TUESDAY THROUGH WEDNESDAY. BY DAY 4 AND 5 IN THE EXTENDED WILL LEAN TOWARD THE ECMWF AND CANADIAN MODELS. THE MRF BUILDS UP TOO MUCH RIDGE BY SATURDAY AND THE ENSEMBLES OF THE MRF AND CANADIAN SUPPORT MORE OF A WETTER ZONAL FLOW OVER THE FORECAST AREA. STARMER. AST 7322 PDX 8433 SLE 9444 EUG 9544 .PDX...SMALL CRAFT ADVISORY COASTAL WATERS FOR SWELL.
In the hours before
Special weather statement, Oct 9, 2:00 PM PDT, 5 hours 15 minutes before
ORZ011-013-WAZ019-100600- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE PORTLAND OR 200 PM PDT MON OCT 9 2000 ...SNOW LIKELY IN THE HIGHER ELEVATIONS OF THE CASCADES OF SOUTHWEST WASHINGTON AND NORTHWEST OREGON TONIGHT AND TUESDAY... SNOW LEVELS ARE EXPECTED TO DROP TO BETWEEN 5000 AND 6000 FEET OVER THE CASCADES OF SOUTHWEST WASHINGTON AND NORTHWEST OREGON TONIGHT AND TUESDAY. THE SNOW LEVELS WILL DROP AFTER A MOIST PACIFIC FRONT MOVES THROUGH. 3 TO 5 INCHES OF SNOW ARE POSSIBLE ABOVE THESE ELEVATIONS LATE TONIGHT THROUGH TUESDAY. HUNTERS AND OTHER OUTDOOR ENTHUSIASTS ARE URGED TO BE PREPARED FOR COOL AND DAMP WEATHER IN ACTIVITIES OVER THE HIGHER CASCADES.
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; radar from the NEXRAD Level II archive.