Alert archive / California / Severe Thunderstorm Warnings in 1996

Severe Thunderstorm Warning 4, NWS Medford, OR

July 15, 1996Siskiyou County, California

NWS Medford, OR issued this severe thunderstorm warning at Jul 15, 1996, 2:37 PM PDT for Siskiyou County, California. 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: Jul 15, 1996, 2:37 PM PDT (21:37 UTC)
Expired: Jul 15, 1996, 3:40 PM PDT
In force: 63 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, 9.6 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.

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: 14 J/kg
Mixed-layer CIN: -513 J/kg
Mixed-layer LCL: 1992 m above ground
0-6 km bulk shear: 9 kt
0-1 km storm-relative helicity: -11 m²/s²
0-3 km storm-relative helicity: 10 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 152140
SVRMFR
CAC093-152240-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MEDFORD OR
237 PM PDT MON JUL 15 1996

THE NATIONAL WEATHER SERVICE IN MEDFORD OR HAS ISSUED A SEVERE
THUNDERSTORM WARNING EFFECTIVE UNTIL 340 PM PDT FOR PEOPLE IN THE
FOLLOWING LOCATIONS...

IN NORTH CENTRAL CALIFORNIA

  ...NORTHEASTERN SISKIYOU COUNTY

AT 235 PM RADAR INDICATES A SEVERE THUNDERSTORM MOVING INTO SISKIYOU
COUNTY 5 MILES NORTHEAST OF DORRIS. THIS STORM IS PRODUCING VERY
HEAVY RAIN AND HAIL. THIS STORM WAS MOVING SOUTHEAST AT 10 MPH AND
WILL MOVE ACROSS LOWER KLAMATH LAKE.

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, Jul 15, 10:17 AM PDT, 4 hours 20 minutes before

ORZ003-005-013-CAZ007-152000-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MEDFORD OR
1015 AM PDT MON JUL 15 1996

...SHOWERS AND THUNDERSTORMS EXPECTED TODAY NEAR THE
CALIFORNIA/OREGON BORDER...

AN AREA OF SHOWERS AND THUNDERSTORMS JUST OFFSHORE NEAR THE
CALIFORNIA/OREGON BORDER WILL SLOWLY MOVE INLAND TODAY.  THE EASTERN
EDGE OF THIS AREA HAS ALREADY MOVED INTO SOUTHERN CURRY COUNTY THIS
MORNING AND WILL PROGRESS SLOWLY INTO JOSEPHINE AND JACKSON COUNTY IN
SOUTHERN OREGON AND SISKIYOU COUNTY IN NORTHERN CALIFORNIA THROUGH
EARLY AFTERNOON.

THESE STORMS ARE MOVING VERY SLOWLY AND THE ATMOSPHERE IS VERY MOIST.
THEREFORE...HEAVY RAINFALL IS POSSIBLE...ESPECIALLY OVER HIGHER
TERRAIN(. SMALL CREEKS MAY SEE SIGNIFICANT RISES. IF YOU LIVE NEAR A
SMALL CREEK OR DRAINAGE...STAY ALERT TODAY FOR THUNDERSTORMS.

SARGEANT

Special weather statement, Jul 15, 1:02 PM PDT, 1 hour 35 minutes before

ORZ003-005-009-013-CAZ007-152300-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MEDFORD OR
100 PM PDT MON JUL 15 1996

...SHOWERS AND THUNDERSTORMS CONTINUE NEAR THE CALIFORNIA/OREGON
BORDER...

AN AREA OF SHOWERS AND THUNDERSTORMS COVERS SOUTHERN CURRY COUNTY
...SOUTHERN JOSEPHINE COUNTY...AND WESTERN SISKIYOU COUNTY.  THIS
AREA WILL CONTINUE TO MOVE SLOWLY EASTWARD THIS AFTERNOON.

IN ADDITION...ISOLATED THUNDERSTORMS ARE DEVELOPING IN KLAMATH
COUNTY...LAKE COUNTY...AND THE REMAINDER OF SISKIYOU COUNTY DUE TO A
MOIST AND UNSTABLE ATMOSPHERE.

THESE STORMS WILL CONTINUE THROUGH THE AFTERNOON AND MAY PRODUCE
HEAVY RAINFALL...ESPECIALLY OVER HIGHER TERRAIN. SMALL CREEKS MAY SEE
SIGNLIFICANT RISES. IF YOU LIVE NEAR A SMALL CREEK OR DRAINAGE...STAY
ALERT TODAY FOR THUNDERSTORMS AND HEAVY RAIN.

SARGEANT

Local storm report, Jul 15, 2:27 PM PDT, 10 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE MEDFORD OR
225 PM PDT MON JUL 15 1996

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

0200 PM    YREKA                     CA  1/2 INCH HAIL - HEAVY RAIN
           SISKIYOU

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 14, 6:55 PM PDT	Severe Thunderstorm Warning	MFR	Siskiyou	40 min

Nearby

Severe Thunderstorm Warnings in California, 1996 Every severe thunderstorm warning in 1996

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.