Alert archive / California / Severe Thunderstorm Warnings in 1997
Severe Thunderstorm Warning 7, NWS Medford, OR
NWS Medford, OR issued this severe thunderstorm warning at Jul 26, 1997, 4:50 PM PDT for Siskiyou County, California. It was in force for 55 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 26, 1997, 4:50 PM PDT (23:50 UTC)
- Expired
- Jul 26, 1997, 5:45 PM PDT
- In force
- 55 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 23:49 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
- 1794 m above ground
- 0-6 km bulk shear
- 14 kt
- 0-1 km storm-relative helicity
- -5 m²/s²
- 0-3 km storm-relative helicity
- 111 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 262355 RRA SVRMFR CAC093-270035- BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE MEDFORD OR 450 PM PDT SAT JUL 26 1997 THE NATIONAL WEATHER SERVICE IN MEDFORD OR HAS ISSUED A SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 545 PM PDT FOR PEOPLE IN THE FOLLOWING LOCATIONS... IN NORTH CENTRAL CALIFORNIA ...NORTH CENTRAL SISKIYOU COUNTY AT 445 PM...RADAR INDICATES A SEVERE THUNDERSTORM IN NORTH CENTRAL SISKIYOU COUNTY 5 MILES NORTH OF FORT JONES. THIS WILL DRIFT SLOWLY TO THE NORTHEAST AND WILL EFFECT AREAS JUST WEST OF YREKA. 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 26, 2:30 PM PDT, 2 hours 20 minutes earlier.
Area forecast discussion, Jul 26, 2:30 PM PDT, 2 hours 20 minutes before
SOUTHWEST OREGON/NORTHEAST CALIFORNIA FORECAST DISCUSSION NATIONAL WEATHER SERVICE MEDFORD OR 230 PM PDT SAT JUL 26 1997 THERML TROF REMAINS ORIENTD OFF THE XTRM NRN CA CST THIS AFTN DRIVG THE N-NE FLOW ACRS THE AREA. MDLS SHOW THIS FEATR WEAKENG SO MAY GET SOME CLDS ALG S CST. TROF WL MOVE INLND ON SUN...SO TEMPS WL BE SIMILR IN WRN VLYS AND WARMR E OF CASCDS. CONVCTN STARTG TO FIRE UP A LTL EARLIER TDY CASCDS EWD AND IN NRN CA...MOST IMPRESSV DVLPMNT ATTM JUST S OF MODOC COUNTY. WITH LTL CHNG IN PTTRN THE CONVCTN WL CONT IN THESE AREAS EACH DAY THRU XTNDD PD. AS LOW DROPS S OUT OF GULF OF AK THE FLOW ALFT WL GRADUALLY BACK. THRU COORDINATN W PDX WL LEAVE TSRA OUT OF ROGUE BASIN MON FOR NOW BECAUSE OF SLIGHT WLY COMPONENT TO FLOW. BETTR FLOW INDICATD BY MRF/ECMWF ON TUE. CRAWFORD .MFR...NONE .KMAX...VCP 21...OPERATING. ...SEE PDXCCFPDX FOR CODED CITIES FORECAST MFR UU 056/094 056/093 056 170001 LMT UU 052/087 051/085 051 172222 RBG UU 058/085 058/084 058 170000 4BK UB 052/069 055/068 054 170000 OTH UB 053/069 055/069 055 170000 YKA UU 054/095 054/093 053 172222 MHS UU 053/087 053/085 052 172222 S11 UU 049/089 049/088 048 172222
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.