Alert archive / Oregon / Tornado Warnings in 1998
Tornado Warning 2, NWS Portland, OR
NWS Portland, OR issued this tornado warning at Oct 3, 1998, 4:54 PM PDT for Clackamas County, Oregon. It was in force for 61 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
- Oct 3, 1998, 4:54 PM PDT (23:54 UTC)
- Expired
- Oct 3, 1998, 5:55 PM PDT
- In force
- 61 min
- Issued by
- NWS Portland, OR
- Area
- Whole counties
County Clackamas County, OR
The radar
The Portland,OR radar (KRTX), 82 km from the middle of the area, began a volume at 23:54 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 12:00Z, 11.9 hours before the alert went out and 68 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
- 96 J/kg
- Mixed-layer CIN
- -2 J/kg
- Mixed-layer LCL
- 508 m above ground
- 0-6 km bulk shear
- 31 kt
- 0-1 km storm-relative helicity
- 123 m²/s²
- 0-3 km storm-relative helicity
- 123 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
921 WFUS1 KPDX 032356 RRA TORPDX ORC005-040055- BULLETIN-IMMEDIATE BROADCAST REQUESTED TORNADO WARNING NATIONAL WEATHER SERVICE PORTLAND OR 454 PM PDT SAT OCT 3 1998 THE NATIONAL WEATHER SERVICE IN PORTLAND HAS ISSUED A * TORNADO WARNING FOR... NORTHWESTERN CLACKAMAS COUNTY IN NORTHWESTERN OREGON * UNTIL 555 PM PDT * AT 445 PM PDT... AREA LAW ENFORCEMENT INDICATED A TORNADO NEAR BARLOW ALONG HIGHWAY 99E AND BARLOW ROAD... MOVING EAST AT 15 MPH. * THE TORNADO IS EXPECTED TO BE NEAR... MULINO BETWEEN 5 AND 515 PM PDT IF YOU ARE IN A CAR...GO IN A NEARBY STURDY BUILDING AS A LAST RESORT LIE FLAT IN A DITCH AND COVER YOUR HEAD. TOLLESON &
What forecasters said that day
The local office's own words before this tornado warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
In the hours before
Special weather statement, Oct 3, 3:00 PM PDT, 1 hour 54 minutes before
ORZALL-040600- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE PORTLAND OR 300 PM PDT SAT OCT 3 1998 ...ACCUMULATING SNOW LIKELY HIGHER ELEVATIONS NORTH OREGON CASCADES EARLY TONIGHT... ...POSSIBLE SNOW ACCUMULATIONS TONIGHT HIGHER MOUNTAINS NORTHEAST OREGON... A COLD PACIFIC TROUGH WILL MOVE ACROSS OREGON TONIGHT. SHOWERS OVER NORTHWEST OREGON WILL TAPER OFF LATER TONIGHT. SHOWERS IN THE NORTH CASCADES MAY DROP AN ADDITIONAL 2 INCHES OF SNOW ABOVE 5000 FEET WITH A DUSTING AS LOW AS 4000 FEET BY MORNING. IN NORTHEAST OREGON...SHOWERS WILL INCREASE EARLY TONIGHT ESPECIALLY MOUNTAINS. SHOWERS WILL CONTINUE INTO SUNDAY MORNING WITH THE SNOW LEVEL LOWERING TO 4500 FEET. SOME LIGHT ACCUMULATION IS POSSIBLE ABOVE 4500 FEET TONIGHT INTO SUNDAY MORNING. STARMER
Special weather statement, Oct 3, 3:00 PM PDT, 1 hour 54 minutes before
ORZALL-040600- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE PORTLAND OR 300 PM PDT SAT OCT 3 1998 ...ACCUMULATING SNOW LIKELY HIGHER ELEVATIONS NORTH OREGON CASCADES EARLY TONIGHT... ...POSSIBLE SNOW ACCUMULATIONS TONIGHT HIGHER MOUNTAINS NORTHEAST OREGON... A COLD PACIFIC TROUGH WILL MOVE ACROSS OREGON TONIGHT. SHOWERS OVER NORTHWEST OREGON WILL TAPER OFF LATER TONIGHT. SHOWERS IN THE NORTH CASCADES MAY DROP AN ADDITIONAL 2 INCHES ABOVE 5000 FEET WITH A DUSTING AS LOW AS 4000 FEET BY MORNING. IN NORTHEAST OREGON...SHOWERS WILL INCREASE EARLY TONIGHT ESPECIALLY MOUNTAINS. SHOWERS WILL CONTINUE INTO SUNDAY MORNING WITH THE SNOW LEVEL LOWERING TO 4500 FEET. SOME LIGHT ACCUMULATIONf IS POSSIBLE ABOVE 4500 FEET TONIGHT INTO SUNDAY MORNING. STARMER
Special weather statement, Oct 3, 3:00 PM PDT, 1 hour 54 minutes before
ORZALL-040600- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE PORTLAND OR 300 PM PDT SAT OCT 3 1998 ...ACCUMULATING SNOW LIKELY HIGHER ELEVATIONS NORTH OREGON CASCADES EARLY TONIGHT... ...POSSIBLE SNOW ACCUMULATIONS TONIGHT HIGHER MOUNTAINS NORTHEAST OREGON... A COLD PACIFIC TROUGH WILL MOVE ACROSS OREGON TONIGHT. SHOWERS OVER NORTHWEST OREGON WILL TAPER OFF LATER TONIGHT. SHOWERS IN THE NORTH CASCADES MAY DROP AN ADDITIONAL 2 INCHES ABOVE 5000 FEET WITH A DUSTING AS LOW AS 4000 FEET BY MORNING. IN NORTHEAST OREGON...SHOWERS WILL INCREASE EARLY TONIGHT ESPECIALLY MOUNTAINS. SHOWERS WILL CONTINUE INTO SUNDAY MORNING WITH THE SNOW LEVEL LOWERING TO 4500 FEET. SOME LIGHT ACCUMULATIONf IS POSSIBLE ABOVE 4500 FEET TONIGHT INTO SUNDAY MORNING. STARMER
Special weather statement, Oct 3, 3:00 PM PDT, 1 hour 54 minutes before
ORZALL-040600- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE PORTLAND OR 300 PM PDT SAT OCT 3 1998 ...ACCUMULATING SNOW LIKELY HIGHER ELEVATIONS NORTH OREGON CASCADES EARLY TONIGHT... ...POSSIBLE SNOW ACCUMULATIONS TONIGHT HIGHER MOUNTAINS NORTHEAST OREGON... A COLD PACIFIC TROUGH WILL MOVE ACROSS OREGON TONIGHT. SHOWERS OVER NORTHWEST OREGON WILL TAPER OFF LATER TONIGHT. SHOWERS IN THE NORTH CASCADES MAY DROP AN ADDITIONAL 2 INCHES OF SNOW ABOVE 5000 FEET WITH A DUSTING AS LOW AS 4000 FEET BY MORNING. IN NORTHEAST OREGON...SHOWERS WILL INCREASE EARLY TONIGHT ESPECIALLY MOUNTAINS. SHOWERS WILL CONTINUE INTO SUNDAY MORNING WITH THE SNOW LEVEL LOWERING TO 4500 FEET. SOME LIGHT ACCUMULATION IS POSSIBLE ABOVE 4500 FEET TONIGHT INTO SUNDAY MORNING. STARMER
Local storm report, Oct 3, 4:45 PM PDT, 9 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE PORTLAND OREGON
445 PM PDT SAT OCT 03 1998
TIME(PDT) .....CITY LOCATION..... STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
0439 PM SILVERTON OR
10/03/98 MARION AT 4PM MARION 8 REPORTED
ROTATING FUNNEL NOW
DISSIPATED. THUNDER IN
PROGRESS.The office that day
Everything else NWS Portland, OR issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Oct 3, 4:13 PM PDT | Tornado Warning | PQR | Clackamas, Marion | 62 min |
Nearby
Tornado Warnings in Oregon, 1998Every tornado warning in 1998Tornadoes in 1998
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.