Alert archive / Oregon / Severe Thunderstorm Warnings in 1999
Severe Thunderstorm Warning 2, NWS Medford, OR
NWS Medford, OR issued this severe thunderstorm warning at May 28, 1999, 5:20 PM PDT for Klamath County, Oregon. It was in force for 50 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
- May 28, 1999, 5:20 PM PDT (00:20 UTC)
- Expired
- May 28, 1999, 6:10 PM PDT
- In force
- 50 min
- Issued by
- NWS Medford, OR
- Area
- Whole counties
County Klamath County, OR
The nearest sounding before it
Medford/Jackson, OR (KMFR), launched 00:00Z, 0.3 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
- 2613 m above ground
- 0-6 km bulk shear
- 47 kt
- 0-1 km storm-relative helicity
- -26 m²/s²
- 0-3 km storm-relative helicity
- 145 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
999 WUUS1 KMFR 290025 RRA SVRMFR ORC035-290110- BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE MEDFORD OR 520 PM PDT FRI MAY 28 1999 THE NATIONAL WEATHER SERVICE IN MEDFORD HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... SOUTHEASTERN AND EASTERN KLAMATH COUNTY IN SOUTH CENTRAL OREGON * UNTIL 610 PM PDT * AT 518 PM PDT... MEDFORD DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM 44 MILES EAST OF KLAMATH FALLS OR 4 MILES EAST OF BLY... THE STORM IS MOVING NORTHEAST AT 15 MPH. THIS STORM IS EXPECTED TO REMAIN OVER RURAL AREAS DAMAGING WINDS AND LARGE HAIL ARE LIKELY. GO INSIDE A STURDY BUILDING AND STAY AWAY FROM WINDOWS BUNNAG
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 28, 2:30 PM PDT, 2 hours 50 minutes earlier.
Area forecast discussion, May 28, 2:30 PM PDT, 2 hours 50 minutes before
SOUTHWEST OREGON/NORTHERN CALIFORNIA FORECAST DISCUSSION NATIONAL WEATHER SERVICE MEDFORD OR 230 PM PDT FRI MAY 28 1999 12Z NGM/ETA/AVN IN. A RELATIVELY WEAK UPPER TROUGH OFFSHORE IS PROGGED TO MOVE ONSHORE THIS EVENING. TIMING WILL MINIMIZE SHOWER ACTIVITY SINCE IT COMES IN TOO LATE TO TAKE ADVANTAGE OF MAXIMUM SURFACE HEATING...BUT IT STILL MAY KICK OFF SOME EVENING SHOWERS OVER THE MOUNTAINS AND EAST SIDE. THE TROUGH WILL HANG UP TONIGHT AS IT DIGS IN OVER THE FORECAST AREA...BUT IT LOOKS LIKE IT WILL SPAWN A CUTOFF LOW TO THE SOUTH AND THEN SHEAR TO THE EAST OF THE FORECAST AREA BY TOMORROW AFTERNOON. SO...THE FORECAST AREA WILL BE ON THE NVA SIDE OF THE TROUGH BY MAX SURFACE HEATING SATURDAY. THE TROUGH DOES NOT MAKE MUCH EASTWARD PROGRESS SO A STRONG TRAILING RIDGE WILL REMAIN OFFSHORE...THOUGH IT MAKES IT PRESENCE FELT WITH INCREASING NORTH WINDS ALOFT ALONG THE WEST COAST. THE UPPER LEVEL TRAJECTORIES WOULD SUPPORT A DRY FORECAST ONCE THE TROUGH MOVES TO THE EAST...ANY SHORT WAVES MOVING DOWN THE BACKSIDE OF THE TROUGH WOULD BE DRY INSIDE SLIDERS. MODEL TIME SECTIONS ALL SCREAM DRY AND STABLE AFTER TONIGHT. HOWEVER...WILL PUT SOME CLOUDS IN THE FORECAST FOR SISKIYOU/MODOC COUNTIES SATURDAY AFTERNOON/EVENING TO ACCOUNT FOR UNCERTAINTY AS TO WHERE THE THUNDERSTORMS IN CALIFORNIA WILL DEVELOP ON SATURDAY. MEANWHILE AT LOW LEVELS...AN OFFSHORE EVENT IS IN THE OFFING BEGINNING SATURDAY NIGHT AND STRENGTHENING SUNDAY NIGHT. NOTHING REALLY DRAMATIC...BUT BROOKINGS WILL GET FAIRLY WARM SUNDAY. LOOK FOR AREAS OF MARINE STRATUS TO BE AROUND SATURDAY MORNING...AND ISOLATED NORTH OF CAPE BLANCO SUNDAY MORNING. SO...A DRY FORECAST FOR THE WEEKEND ONCE THE TROUGH MOVES THROUGH... WHICH SHOULD OCCUR BY NOON SATURDAY. THE ONE EXCEPTION TO THIS WILL BE THE AFOREMENTIONED MARINE STRATUS. STOCKTON. .MFR...GALE WARNING...COASTAL WATERS FLORENCE TO PT ST GEORGE. MFR UU 047/082 045/086 047 150000 LMT BU 045/079 040/083 042 152000 RBG UU 048/078 046/082 048 150000 4BK BU 049/066 052/080 058 150000 OTH BU 047/061 046/064 051 150000 YKA BU 044/083 041/086 043 150000 MHS BU 048/080 045/083 047 150000 AAT BU 042/081 038/085 040 152000
Nearby
Severe Thunderstorm Warnings in Oregon, 1999Every severe thunderstorm warning in 1999
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.