Alert archive / California / Severe Thunderstorm Warnings in 1997
Severe Thunderstorm Warning 15, NWS Medford, OR
NWS Medford, OR issued this severe thunderstorm warning at Jul 28, 1997, 4:49 PM PDT for Siskiyou County, California. It was in force for 56 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
- Jul 28, 1997, 4:49 PM PDT (23:49 UTC)
- Expired
- Jul 28, 1997, 5:45 PM PDT
- In force
- 56 min
- Issued by
- NWS Medford, OR
- Area
- Whole counties
County Siskiyou County, CA
The radar
The Medford radar (KMAX), 56 km from the middle of the area, began a volume at 23:52 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.
The nearest sounding before it
Medford/Jackson, OR (KMFR), launched 12:00Z, 11.8 hours before the alert went out and 89 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
- 1549 m above ground
- 0-6 km bulk shear
- 5 kt
- 0-1 km storm-relative helicity
- -22 m²/s²
- 0-3 km storm-relative helicity
- 28 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KMFR 282354 RRA SVRMFR CAC093-290045- BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE MEDFORD OR 449 PM PDT MON JUL 28 1997 THE NATIONAL WEATHER SERVICE IN MEDFORD HAS ISSUED A SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 545 PM PDT FOR PEOPLE IN THE FOLLOWING LOCATION...... IN NORTH CENTRAL CALIFORNIA ...WESTERN SISKIYOU COUNTY AT 450PM RADAR INDICATED A SEVERE THUNDERSTORM MOVING THROUGH WESTERN SISKIYOU COUNTY. THE STORM WAS ABOUT 10 MILES SOUTHEAST OF CLEAR CREEK. THE STORM WAS MOVING NORTHWEST AT 15 MPH AND WILL PRODUCE VERY HEAVY RAIN AND HAIL. SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND IN EXCESS OF 55 MPH...DESTRUCTIVE HAIL...DEADLY LIGHTNING...AND VERY HEAVY RAINSHOWERS. IF THREATENING WEATHER APPROACHES TAKE SHELTER. WHILE DRIVING BE ALERT TO POSSIBLE FLOODING IN LOW LYING AREAS.
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 28, 2:30 PM PDT, 2 hours 19 minutes earlier.
Area forecast discussion, Jul 28, 2:30 PM PDT, 2 hours 19 minutes before
SOUTHWEST OREGON/NORTHEAST CALIFORNIA FORECAST DISCUSSION NATIONAL WEATHER SERVICE MEDFORD OR 230 PM PDT MON JUL 28 1997 CONVECTN HAS BEGUN AND AS XPCTD IT LOOKS TO BE AN ACTV EVNG. THUS FAR STORMS SEEM TO BE MOVG VRY SLWLY NWD. WV LOOP SHOWS MOISTURE WORKG ITS WAY NWWD OUT OF NWRN NV. DEWPTS UP IN THE 50S AND SFC TEMPS RUNNG AT LEAST AS WRM AS YDY. TMRW WL BE SIMILR WITHOUT THE CHC FOR WRN OREGON TO GET ANY WX AS WNDS ALFT TURN MORE SWLY. WITH SWLY WNDS BEST MSTR WL ADVECT E BY WED SO STORMS WL DECREASE IN NUMBER/INTENSITY WITH BEST ACTN IN XTRM ERN PART OF CWA. .MFR...NONE .KMAX...VCP 21...OPERATING. ...SEE PDXCCFPDX FOR CODED CITIES FORECAST MFR BU 057/090 057/088 XXX 1720-X LMT TB 051/083 050/082 XXX 17433X RBG UU 057/082 056/081 XXX 17100X 4BK BB 052/067 052/068 XXX 17000X OTH BB 054/069 054/069 XXX 17000X YKA TU 053/091 052/089 XXX 17433X MHS TU 052/085 051/083 XXX 17433X S11 TU 047/086 045/084 XXX 17433X
Nearby
Severe Thunderstorm Warnings in California, 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.