Alert archive / Oregon / Tornado Warnings in 1998
Tornado Warning 1, NWS Portland, OR
NWS Portland, OR issued this tornado warning at Oct 3, 1998, 4:13 PM PDT for Clackamas County, Marion County, Oregon. It was in force for 62 min. 1 report came from inside the area while it was in force.
The area
The counties it named, with what was reported inside it.
The facts
- Issued
- Oct 3, 1998, 4:13 PM PDT (23:13 UTC)
- Expired
- Oct 3, 1998, 5:15 PM PDT
- In force
- 62 min
- Issued by
- NWS Portland, OR
- Area
- Whole counties
Counties Clackamas County, OR, Marion County, OR
The radar
The Portland,OR radar (KRTX), 86 km from the middle of the area, began a volume at 23:13 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.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Oct 3, 4:45 PM PDT | Tornado F0 | Canby, OR | A tornado was spotted by several residents of Canby at 445 PM PDT south of Highway 99 off Barlow Road. The tornado did very minor damage to the home at 25170 S. Barlow Road, and did minor damage to a barn nearby that was being demolished. Five trees were blow |
NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in.
The nearest sounding before it
Salem/Mcnary, OR (KSLE), launched 12:00Z, 11.2 hours before the alert went out and 49 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
The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.
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 13 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 13 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 13 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 13 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
The office that day
Everything else NWS Portland, OR issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Oct 3, 4:54 PM PDT | Tornado Warning | PQR | Clackamas | 61 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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.