Alert archive / California / Severe Thunderstorm Warnings in 2025

Severe Thunderstorm Warning 8, NWS Medford, OR

June 30, 2025Siskiyou County, California

NWS Medford, OR issued this severe thunderstorm warning at Jun 30, 2025, 4:44 PM PDT for Siskiyou County, California. It was in force for 46 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: Jun 30, 2025, 4:44 PM PDT (23:44 UTC)
Expired: Jun 30, 2025, 5:30 PM PDT
In force: 46 min
Issued by: NWS Medford, OR
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

County Siskiyou County, CA

The radar

The Medford radar (KMAX), 56 km from the middle of the area, began a volume at 23:45 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

Salem/Mcnary, OR (KSLE), launched 12:00Z, 11.7 hours before the alert went out and 372 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: 2096 m above ground
0-6 km bulk shear: 22 kt
0-1 km storm-relative helicity: 31 m²/s²
0-3 km storm-relative helicity: 81 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

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 Jun 30, 2:29 PM PDT, 2 hours 15 minutes earlier.

Area forecast discussion, Jun 30, 2:29 PM PDT, 2 hours 15 minutes before

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In the hours before

Special weather statement, Jun 30, 2:01 PM PDT, 2 hours 43 minutes before

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Special weather statement, Jun 30, 2:56 PM PDT, 1 hour 48 minutes before

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Special weather statement, Jun 30, 4:36 PM PDT, 8 minutes before

Special Weather Statement
National Weather Service Medford OR
436 PM PDT Mon Jun 30 2025

ORZ029-010000-
Klamath Basin OR-
436 PM PDT Mon Jun 30 2025

...A strong thunderstorm will impact portions of southwestern Klamath
County through 500 PM PDT
...

At 436 PM PDT, Doppler radar was tracking a strong thunderstorm near
Modoc Point, or 17 miles north of Klamath Falls. This storm was
nearly stationary.

HAZARD...Winds in excess of 40 mph and pea size hail.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around
         unsecured objects. Minor damage to outdoor objects is
         possible.

This storm will remain over mainly rural areas of southwestern
Klamath County.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

&&

LAT...LON 4249 12162 4240 12173 4250 12187 4259 12177
TIME...MOT...LOC 2336Z 127DEG 3KT 4248 12177

MAX HAIL SIZE...0.25 IN
MAX WIND GUST...40 MPH

DW

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 30, 2:01 PM PDT	Special Weather Statement	MFR		44 min
Jun 30, 4:36 PM PDT	Special Weather Statement	MFR	Klamath	24 min
Jun 30, 4:50 PM PDT	Special Weather Statement	MFR	Klamath	25 min
Jun 30, 1:28 PM PDT	Red Flag Warning	MFR	Siskiyou	31 hr
Jun 30, 2:56 PM PDT	Special Weather Statement	MFR	Siskiyou	34 min

Nearby

Severe Thunderstorm Warnings in California, 2025 Every severe thunderstorm warning in 2025

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.