Alert archive / Oregon / Severe Thunderstorm Warnings in 1992

Severe Thunderstorm Warning 2, NWS Medford, OR

May 6, 1992Klamath County, Oregon

NWS Medford, OR issued this severe thunderstorm warning at May 6, 1992, 7:48 PM PDT for Klamath County, Oregon. It was in force for 57 min.

The area

The counties it named.

The facts

Issued: May 6, 1992, 7:48 PM PDT (02:48 UTC)
Expired: May 6, 1992, 8:45 PM PDT
In force: 57 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, 2.8 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.

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: 393 J/kg
Mixed-layer CIN: -287 J/kg
Mixed-layer LCL: 3051 m above ground
0-6 km bulk shear: 17 kt
0-1 km storm-relative helicity: 12 m²/s²
0-3 km storm-relative helicity: 35 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

000 
TTAA00 KMFR 070248
SVRMFR
ORC035-070345-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING 
NATIONAL WEATHER SERVICE MEDFORD OR
748 PM PDT WED MAY 6 1992

THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM 
WARNING EFFECTIVE UNTIL 845 PM PDT FOR PEOPLE IN THE FOLLOWING 
COUNTY

   IN THE SOUTH CENTRAL PART OF OREGON
      WESTERN KLAMATH

AT 740 PDT MEDFORD RADAR HAS DETECED A STRONG THUNDERSTORM ABOUT
1 MILE SOUTH OF FORT KLAMATH OREGON...32 MILES NORTHWEST OF KLAMATH
FALLS OREGON. THE THUNDERSTORM IS MOVING SLOWLY NORTHWARD.

IF YOU ARE IN AN AREA THREATENED BY THE STORM..GO TO A REINFORECED
SHELTER AND PREPARE FOR DAMAGING WIND...LARGE HAIL...VERY HEAVY
RAIN AND LIGHTNING.

PRITCHETT

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.

In the hours before

Special weather statement, May 6, 5:36 PM PDT, 2 hours 12 minutes before

ORZ005-DDHHMM-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MEDFORD OR
 500 PDT PM WED MAY 6 1992

...THUNDERSTORMS DEVELOPING OVER SOUTHERN OREGON THIS EVENING...

AN UNSTABLE AIRMASS OVER SOUTHERN OREGON THIS EVENING IS PRODUCING
NUMEROUS THUNDERSTORMS OVER THE SOUTHERN OREGON CASCADES AND SISKIYOUS
THIS EVENING.

THE THUNDERSTORMS ARE MOVING SLOWLY TOWARDS THE NORTH AND NORTHWEST AND
ARE EXPECTED TO LAST FOR THE NEXT FEW HOURS. THESE THUNDERSTORMS
ARE CAPABLE OF PRODUCING...STRONG WINDS THAT COULD DOWN SMALL TREES...
BRIEF HEAVY RAIN...SMALL HAIL...AND FREQUENT LIGHTNING.

THERE HAVE BEEN SCATTERED REPORTS OF SMALL TREES BEING BLOWN OVER IN
SOUTHERN DESCHUTES COUNTY IN THE PAST 2 HOURS.
 IF THUNDERSTORMS OCCUR IN YOUR AREA DO NOT TAKE SHELTER UNDER
TALL TREES OR OTHER LARGE OBJECTS THAT MAY ATTRACT LIGHTNING.

WSO MEDFORD

PRITCHETT

The office that day

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

Issued	Product	Office	Counties	Lasted
May 6, 5:50 PM PDT	Severe Thunderstorm Warning	MFR	Jackson, Klamath	55 min

Nearby

Severe Thunderstorm Warnings in Oregon, 1992 Every severe thunderstorm warning in 1992

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.