Alert archive / Oregon / Severe Thunderstorm Warnings in 1998
Severe Thunderstorm Warning 8, NWS Medford, OR
NWS Medford, OR issued this severe thunderstorm warning at May 6, 1998, 4:33 PM PDT for Lake County, Oregon. It was in force for 47 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
- May 6, 1998, 4:33 PM PDT (23:33 UTC)
- Expired
- May 6, 1998, 5:20 PM PDT
- In force
- 47 min
- Issued by
- NWS Medford, OR
- Area
- Whole counties
County Lake County, OR
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| May 6, 5:30 PM PDT | Hail 0.75 | Summer Lake, OR |
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
Medford/Jackson, OR (KMFR), launched 12:00Z, 11.6 hours before the alert went out and 203 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
- 568 m above ground
- 0-6 km bulk shear
- 27 kt
- 0-1 km storm-relative helicity
- -16 m²/s²
- 0-3 km storm-relative helicity
- 44 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
565 WUUS1 KMFR 062335 RRA SVRMFR ORC037-070020- BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE MEDFORD OR 433 PM PDT WED MAY 6 1998 THE NATIONAL WEATHER SERVICE IN MEDFORD HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... NORTHWESTERN LAKE COUNTY IN SOUTH CENTRAL OREGON * UNTIL 520 PM PDT * AT 430 PM PDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM 15 MILES NORTHEAST OF SILVER LAKE... MOVING WEST AT 10 MPH. * THE SEVERE THUNDERSTORM WILL BE NEAR... FORT ROCK AT 510 PM PDT THIS IS A DANGEROUS STORM STAY INDOORS AWAY FROM WINDOWS. CRAWFORD
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 Medford, OR wrote its last area forecast discussion before this severe thunderstorm warning went out at May 6, 2:30 PM PDT, 2 hours 3 minutes earlier.
Area forecast discussion, May 6, 2:30 PM PDT, 2 hours 3 minutes before
SOUTHWEST OREGON/NORTHEAST CALIFORNIA FORECAST DISCUSSION NATIONAL WEATHER SERVICE MEDFORD OR 230 PM PDT WED MAY 06 1998 SCT SHRA/TSRA POPPING UP IN LAKE...KLAMATH...AND MODOC COUNTIES ATTM. WITH THETA-E RIDGE STRECTHED ACRS SRN ORE/EXTRM NERN CA WOULD EXPECT CONTINUED DEVELOPEMENT CASCADES EWD. ONSHORE FLOW AND MCLDY SKIES STABILIZING AIRMASS W OF CASCADES BUT SCTD SHRA OR SPRINKLES STILL POSSIBLE. ALTHOUGH MID-UPR LVL ELY FLOW WILL PERSIST INTO THU THE STUBBORN UPR LOW WILL LOSE MORE OF ITS INFLUENCE AS A RIDGE BUILDS INTO THE COUNTY WARNING AREA. ONLY ISOLATED TSRA POSSIBLE OVR THE MTNS OF SC ORE AND NERN CA. LOW LVL FLOW WILL CONTINUE ONSHORE AND STRENGHTEN. MARINE CLOUDS HAVING DIFFICULT TIME CLEARING OUT THIS AFTN AND THAT WILL LIKELY BE THE CASE THROUGH FRI. NEXT TROUGH SCHEDULED TO ARRIVE ON THE COAST LATE FRI AFTN. LIMITED OMEGA FIELD TO SUPPORT ONLY FEW SHRA OR SPINKLES ON THE COAST. WILL STAY CLOSER TO AVN TEMPS WHICH LOOKS MORE REASONABLE WITH INTRUSION OF MARINE AIR AND CLOUD COVER. IN THE EXTENDED... TROUGH PASSES BY SAT FOR COOLER TEMPS AND A FEW INSTABILITY SHRA. SUN LOOKS MOSTLY DRY WITH SOME RIDGING ALG THE PAC NW COAST. FOSTER .KMFR...NONE .KMAX...VCP 21 ...SEE PDXCCFPDX FOR CODED CITIES FORECAST MFR BB 050/072 048/069 046 103111 LMT BB 042/067 041/066 039 105111 RBG BB 051/069 049/067 047 103112 4BK EE 051/061 049/061 047 101112 OTH EE 051/061 049/060 049 101113 YKA BB 044/070 043/067 042 103111 MHS BB 042/067 041/066 041 103111 S11 BB 042/068 039/067 038 105111
The office that day
Everything else NWS Medford, OR issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 6, 4:11 PM PDT | Severe Thunderstorm Warning | MFR | Lake | 44 min |
Nearby
Severe Thunderstorm Warnings in Oregon, 1998Every severe thunderstorm warning 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.