Alert archive / Oregon / Severe Thunderstorm Warnings in 1998

Severe Thunderstorm Warning 4, NWS Medford, OR

April 22, 1998Douglas County, Oregon

NWS Medford, OR issued this severe thunderstorm warning at Apr 22, 1998, 9:17 PM PDT for Douglas County, Oregon. It was in force for 63 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: Apr 22, 1998, 9:17 PM PDT (04:17 UTC)
Expired: Apr 22, 1998, 10:20 PM PDT
In force: 63 min
Issued by: NWS Medford, OR
Area: Whole counties

County Douglas County, OR

The nearest sounding before it

Medford/Jackson, OR (KMFR), launched 00:00Z, 4.3 hours before the alert went out and 106 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.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 2259 m above ground
0-6 km bulk shear: 33 kt
0-1 km storm-relative helicity: 41 m²/s²
0-3 km storm-relative helicity: 121 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.

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 Apr 22, 8:30 PM PDT, 47 minutes earlier.

Area forecast discussion, Apr 22, 8:30 PM PDT, 47 minutes before

SOUTHWEST OREGON/NORTHEAST CALIFORNIA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE MEDFORD OR
830 PM PDT WED APR 22 1998

SEVERE THUNDERSTORMS ONGOING IN SOUTHWEST OREGON ATTM. WILL CONTINUE
TIL ALMOST MIDNIGHT WHEN THEY ARE EXPECTED TO WEAKEN AND MOVE INTO
THE SOUTHERN WILLAMETTE VLY. WILL BEEF UP 1ST PD POPS IN SOUTHERN
OREGON.  BURBACK

.KMFR...NONE

.KMAX...VCP 32

...SEE PDXCCFPDX FOR CODED CITIES FORECAST

MFR CE 049/065 045/060 040 093553
LMT CE 043/060 039/055 035 092552
RBG CE 048/064 044/060 041 094553
4BK CE 050/058 043/059 042 092553
OTH CE 050/057 045/058 043 091553
YKA CE 044/063 038/059 033 092553
MHS CE 046/058 039/054 035 092553
S11 CE 040/062 034/054 03~2 093552

In the hours before

Local storm report, Apr 22, 8:11 PM PDT, 1 hour 6 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE MEDFORD OREGON
811 PM PDT WED APR 22 1998

TIME(PDT)  .....CITY LOCATION..... STATE  ...EVENT/REMARKS...
           ....COUNTY LOCATION....

0809 PM    SELMA                     OR   .75 INCH HAIL
04/22/98   JOSEPHINE                      SPOTTER JO23 4E OF SELMA
                                          REPORTS DIME SIZED HAIL AT
                                          2005 PDT.

The office that day

Everything else NWS Medford, OR issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Apr 22, 7:17 PM PDT	Severe Thunderstorm Warning	MFR	Douglas, Jackson	48 min
Apr 22, 8:09 PM PDT	Severe Thunderstorm Warning	MFR	Josephine	46 min
Apr 22, 8:45 PM PDT	Severe Thunderstorm Warning	MFR	Jackson, Josephine	45 min
Apr 22, 10:15 PM PDT	Severe Thunderstorm Warning	MFR	Douglas	45 min

Nearby

Severe Thunderstorm Warnings in Oregon, 1998 Every 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.