Alert archive / California / Severe Thunderstorm Warnings in 1998
Severe Thunderstorm Warning 16, NWS Medford, OR
NWS Medford, OR issued this severe thunderstorm warning at Jul 22, 1998, 3:42 PM PDT for Siskiyou County, California. It was in force for 58 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 22, 1998, 3:42 PM PDT (22:42 UTC)
- Expired
- Jul 22, 1998, 4:40 PM PDT
- In force
- 58 min
- Issued by
- NWS Medford, OR
- Area
- Whole counties
County Siskiyou County, CA
The nearest sounding before it
Medford/Jackson, OR (KMFR), launched 12:00Z, 10.7 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
- 40 J/kg
- Mixed-layer CIN
- -582 J/kg
- Mixed-layer LCL
- 1516 m above ground
- 0-6 km bulk shear
- 12 kt
- 0-1 km storm-relative helicity
- -4 m²/s²
- 0-3 km storm-relative helicity
- 24 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
562 WUUS1 KMFR 222247 RRA SVRMFR CAC093-222340- BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE MEDFORD OR 342 PM PDT WED JUL 22 1998 THE NATIONAL WEATHER SERVICE IN MEDFORD HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... SOUTH CENTRAL SISKIYOU COUNTY IN NORTH CENTRAL CALIFORNIA * UNTIL 440 PM PDT * AT 340 PM...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM 12 MILES WEST OF WEED OR 10 MILES EAST OF ETNA MOVING NORTHEAST AT 10 MPH. * THE SEVERE THUNDERSTORM WILL REMAIN... OVER RURAL AREAS THIS IS A DANGEROUS STORM STAY INDOORS AWAY FROM WINDOWS. AF
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 22, 2:30 PM PDT, 1 hour 12 minutes earlier.
Area forecast discussion, Jul 22, 2:30 PM PDT, 1 hour 12 minutes before
SOUTHWEST OREGON/NORTHEAST CALIFORNIA FORECAST DISCUSSION NATIONAL WEATHER SERVICE MEDFORD OR 230 PM PDT WED JUL 22 1998 INTRUSTION OF MONSOONAL MOISTURE WILL INCREASE THREAT OF TSTMS OVER THE NEXT FEW DAYS. INCREASINGLY SSE FLOW BETWEEN THE GREAT BASIN HIGH AND WEAK TROUGH PATTERN ALONG THE WEST COAST WILL BRING SCATTERED TSTMS TO SC ORE/NERN CA AND POSSIBLY INTO THE ROGUE BASIN. AMPLE LOW LEVEL MOISTURE IN PLACE WITH DEW POINTS THIS AFTN ARND 60 DEG C FROM SHASTA VALLEY NWD INTO ROGUE AND KLAMATH BASINS. CONVECTION BEGINNING AT TO FIRE AT 21Z ON LEADING EDGE OF DEBRIS CLOUDS AND HEAD OF MOISTURE PLUME MVG INTO NRN CA/NWRN NV. CONCERNS WILL SHIFT TO FLASH FLOOD POTENTIAL OVER NEXT COUPLE OF DAYS DUE TO MOISTENING AIRMASS AND LIGHT STEERING CURRENTS. COAST WILL REMAIN UNDER INFLUENCE OF MARINE LAYER. JUST MINOR COOLING WITH INCREASE IN CLOUDS AND TSTM ACTIVITY. NO MAJOR CHANGES INTO THE WEEKEND AS LARGE SCALE PATTERN CHANGES LITTLE. FOSTER KMFR...NONE .KMAX...VCP 21 ...SEE PDXCCFPDX FOR CODED CITIES FORECAST MFR UU 066/098 066/097 066 101222 LMT BB 060/093 059/093 058 103443 RBG UU 061/091 061/091 061 101111 4BK BB 055/066 055/064 055 100000 OTH BB 056/065 056/065 056 100000 YKA UU 061/098 060/098 059 102443 MHS BB 059/089 059/089 058 103443 S11 BB 056/093 057/093 056 103443
The office that day
Everything else NWS Medford, OR issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 22, 4:08 PM PDT | Flash Flood Warning | MFR | Siskiyou | 4 hr |
| Jul 22, 4:36 PM PDT | Severe Thunderstorm Warning | MFR | Siskiyou | 59 min |
Nearby
Severe Thunderstorm Warnings in California, 1998Every severe thunderstorm warning in 1998
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.