Alert archive / Oregon / Severe Thunderstorm Warnings in 1997
Severe Thunderstorm Warning 18, NWS Medford, OR
NWS Medford, OR issued this severe thunderstorm warning at Aug 1, 1997, 5:41 PM PDT for Jackson County, Oregon. It was in force for 34 min. 3 reports 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
- Aug 1, 1997, 5:41 PM PDT (00:41 UTC)
- Expired
- Aug 1, 1997, 6:15 PM PDT
- In force
- 34 min
- Issued by
- NWS Medford, OR
- Area
- Whole counties
County Jackson County, OR
The radar
The Medford radar (KMAX), 39 km from the middle of the area, began a volume at 00:42 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 |
|---|---|---|---|
| Aug 1, 6:01 PM PDT | Hail 0.75 | Central Pt, OR | |
| Aug 1, 6:01 PM PDT | Hail 0.75 | White City, OR | |
| Aug 1, 6:07 PM PDT | Hail 1.38 | Central Pt, OR | REPORTED BY NWS EMPLOYEE |
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 00:00Z, 0.7 hours before the alert went out and 9 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
- 884 J/kg
- Mixed-layer CIN
- -61 J/kg
- Mixed-layer LCL
- 2238 m above ground
- 0-6 km bulk shear
- 26 kt
- 0-1 km storm-relative helicity
- -23 m²/s²
- 0-3 km storm-relative helicity
- 40 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.3
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KMFR 020056 RRA SVRMFR ORC029-020115- BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE MEDFORD OR 541 PM PDT FRI AUG 1 1997 THE NATIONAL WEATHER SERVICE IN MEDFORD OR HAS ISSUED A SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 615 PM PDT FOR PEOPLE IN THE FOLLOWING LOCATIONS... IN SOUTHWEST OREGON ...SOUTH CENTRAL JACKSON COUNTY A SEVERE THUNDERSTORM HAS BEEN DETECTED JUST SOUTH OF MEDFORD...OR JUST SOUTHWEST OF TALENT. THIS SEVERE STORM IS CAPABLE OF PRODUCING HAIL UP TO ONE AND A HALF INCHES IN DIAMETER. THE STORM IS MOVING NORTHEAST AT 15-20 MPH AND WILL PASS ACROSS TALENT AND PHOENIX BY 6PM. THIS IS A DANGEROUS STORM...SEEK SHELTER IMMEDIATELY! HOLTZ
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 Aug 1, 2:30 PM PDT, 3 hours 11 minutes earlier.
Area forecast discussion, Aug 1, 2:30 PM PDT, 3 hours 11 minutes before
SOUTHWEST OREGON/NORTHEAST CALIFORNIA FORECAST DISCUSSION NATIONAL WEATHER SERVICE MEDFORD OR 230 PM PDT FRI AUG 01 1997 LESS CONV ACTVTY THIS AFTN THAN YSTRDY. ONLY TCU THUS FAR ALNG THE CASCDS. STILL APRS TO BE A WK ROT CNTR OVR NW CA..SO WL CONT WITH ISOLD TSRA THIS EVE CAZ11/12 AND ORZ08/12/15 AS AMS APCHG CONV TEMP. WKEND PTRN SHWS UPR HI RETROGRDS TO 4 CRNRS AREA WITH UPR TROF OFSHR AND SWRLY FLO ALFT CONT. HGTS RISE THRU THE WKEND WITH WRMG ALFT AND MOR STBL AMS. THINK ISOLD TSRA STILL POSS CASCDS EWD AND SISKIYOUS EWD OVR CA THO ACTVTY LESS WDSPRD. WITH AMS WRMG THIS WKEND APRS GUID TEMPS TOO COOL SO WL INCR SUM. LT NGT AND MRNG LO CLDS WL CONT SAT/SUN CSTL AREAS WITH FAIRLY WK PRES GRADS. RC .MFR...NONE .KMAX...VCP 21...OPERATING. ...SEE PDXCCFPDX FOR CODED CITIES FORECAST MFR UU 059/091 060/094 061 061--- LMT UU 050/086 050/088 051 061111 RBG UU 056/085 056/086 057 060000 4BK BB 053/068 053/069 053 060000 OTH BB 053/069 053/070 053 060000 YKA UU 050/090 050/094 051 061111 MHS UU 049/084 050/087 051 061111 S11 UU 045/086 046/088 047 061111
The office that day
Everything else NWS Medford, OR issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 1, 6:51 PM PDT | Flash Flood Warning | MFR | Klamath | 94 min |
Nearby
Severe Thunderstorm Warnings in Oregon, 1997Every severe thunderstorm warning in 1997
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.