Alert archive / Oregon / Severe Thunderstorm Warnings in 1997
Severe Thunderstorm Warning 10, NWS Medford, OR
NWS Medford, OR issued this severe thunderstorm warning at Jul 27, 1997, 3:55 PM PDT for Klamath County, Oregon. It was in force for 50 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
- Jul 27, 1997, 3:55 PM PDT (22:55 UTC)
- Expired
- Jul 27, 1997, 4:45 PM PDT
- In force
- 50 min
- Issued by
- NWS Medford, OR
- Area
- Whole counties
County Klamath County, OR
The radar
The Medford radar (KMAX), 110 km from the middle of the area, began a volume at 22:54 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.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Jul 27, 4:40 PM PDT | Hail 1 | Crescent Lake, OR | REPORTED BY SPOTTER TRAVELLING ON HWY 58. |
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, 10.9 hours before the alert went out and 101 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
- 1891 m above ground
- 0-6 km bulk shear
- 14 kt
- 0-1 km storm-relative helicity
- -18 m²/s²
- 0-3 km storm-relative helicity
- 65 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
005 WUUS1 KMFR 272254 RRA SVRMFR ORC035-272345- BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE MEDFORD OR 355 PM PDT SUN JUL 27 1997 THE NATIONAL WEATHER SERVICE IN MEDFORD OR HAS ISSUED A SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 445 PM PDT FOR PEOPLE IN THE FOLLOWING LOCATIONS... IN SOUTH CENTRAL OREGON ...NORTH CENTRAL KLAMATH COUNTY AT 355 PM...RADAR INDICATED A SEVERE THUNDERSTORM EXTREME NOTHERN KLAMATH COUNTY 12 MILES NORTHWEST OF CRESCENT. 3/4 INCH DIAMETER WAS REPORTED BY A SPOTTER ON HIGHWAY 58 WEST OF CRESCENT. LARGE HAIL WILL BE LIKELY THIS STORM. THIS STORM WILL MOVE NORTH AT 10 MPH INTO EXTREME SOUTHWEST DESCHUTES COUNTY 15 MILES WEST OF LA PINE AROUND 420 PM. BE ALERT FOR LOCAL FLOODING CAUSED BY THUNDERSTORM RAINS. FOSTER
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 Jul 27, 2:30 PM PDT, 1 hour 25 minutes earlier.
Area forecast discussion, Jul 27, 2:30 PM PDT, 1 hour 25 minutes before
SOUTHWEST OREGON/NORTHEAST CALIFORNIA FORECAST DISCUSSION NATIONAL WEATHER SERVICE MEDFORD OR 230 PM PDT SUN JUL 27 1997 CONVCTN BEGINNG TO BUBBLE THIS AFTN. STILL FEEL THAT E OF CASCDS/NRN CA WL BE FOCUS OF TSRA...WL LEAVE SLT CHC OF A CELL TO DRIFT INTO SE ROGUE BASIN TNGT. THERML TROF WL DRIFT INTO ERN OR MON. NGM LI VALUES BOTTOM OUT AT -6 IN S CENT AND SERN OR MON AFTN...WITH BLO 0 VALUES WELL WEST OF CASCDS. THETA-E RDG ORIENTED FM UT/NRN NV AND INTO CNTL OREGON TO PROVIDE THE JUICE. CONSENSUS OF MDLS HAVE MID LVL FLOW STRAIGHT SLY. BY TUE AFTN THE FLOW TURNS MORE SWLY AND WHILE MSTR AND INSTABILITY STILL AMPLE E OF CASCDS...W SIDE SAME OR EVEN A BIT LESS. WL NOT MENTN CHC OF TSRA W SIDE TUE. XPCT CSTL ST TO REFORM ALG CST EACH MRNG...WITH THE MARINE PUSH FINALLY OCCURRG THU MRNG ACCORDG TO MRF. CRAWFORD .MFR...NONE .KMAX...VCP 21...OPERATING. ...SEE PDXCCFPDX FOR CODED CITIES FORECAST MFR BU 058/093 057/090 057 171120 LMT TB 053/085 051/083 050 172343 RBG UU 057/086 057/082 056 170-10 4BK BB 051/068 052/068 052 170000 OTH BB 053/069 054/069 054 170000 YKA TU 054/095 053/091 052 172343 MHS TU 053/086 052/083 051 172343 S11 TU 048/088 047/086 045 172343
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.