Alert archive / California / Special Weather Statements in 2025

Special Weather Statement, NWS Eureka, CA

July 31, 2025Siskiyou County, California

NWS Eureka, CA issued this special weather statement at Jul 31, 2025, 7:21 PM PDT for Siskiyou County, California. It was in force for 24 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Jul 31, 2025, 7:21 PM PDT (02:21 UTC)
Expired: Jul 31, 2025, 7:45 PM PDT
In force: 24 min
Issued by: NWS Eureka, CA
Hail: 0.25 in
Wind: 30

County Siskiyou County, CA

The radar

The Medford radar (KMAX), 100 km from the middle of the area, began a volume at 02:23 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

Medford/Jackson, OR (KMFR), launched 00:00Z, 2.4 hours before the alert went out and 132 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: 689 J/kg
Mixed-layer CIN: -15 J/kg
Mixed-layer LCL: 2565 m above ground
0-6 km bulk shear: 8 kt
0-1 km storm-relative helicity: -15 m²/s²
0-3 km storm-relative helicity: 1 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

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What forecasters said that day

The local office's own words before this special weather statement went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Eureka, CA wrote its last area forecast discussion before this special weather statement went out at Jul 31, 2:23 PM PDT, 4 hours 58 minutes earlier.

Area forecast discussion, Jul 31, 2:23 PM PDT, 4 hours 58 minutes before

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In the hours before

Special weather statement, Jul 31, 4:30 PM PDT, 2 hours 51 minutes before

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Special weather statement, Jul 31, 4:41 PM PDT, 2 hours 40 minutes before

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Special weather statement, Jul 31, 4:43 PM PDT, 2 hours 38 minutes before

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Special weather statement, Jul 31, 5:12 PM PDT, 2 hours 9 minutes before

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Special weather statement, Jul 31, 5:43 PM PDT, 1 hour 38 minutes before

Special Weather Statement
National Weather Service Eureka CA
543 PM PDT Thu Jul 31 2025

CAZ107-010115-
Northern Trinity CA-
543 PM PDT Thu Jul 31 2025

...A STRONG THUNDERSTORM WILL IMPACT NORTHEASTERN TRINITY COUNTY
UNTIL 615 PM PDT...

At 543 PM PDT, Doppler radar was tracking a strong thunderstorm 9
miles north of Coffee Creek, or 34 miles north of Weaverville,
moving northeast at 15 mph.

HAZARD...Wind gusts up to 30 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.

Locations impacted include...
  Mainly rural areas of Northeastern Trinity County.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Monitor the weather situation closely and be alert for threatening
weather conditions.

&&

LAT...LON 4112 12270 4120 12280 4123 12278 4125 12273
      4127 12271 4129 12265 4133 12264 4133 12259
      4134 12258 4136 12259 4137 12257 4136 12255
      4134 12254 4134 12250 4133 12250 4132 12248
      4131 12250 4129 12250 4128 12251 4123 12251
TIME...MOT...LOC 0042Z 226DEG 12KT 4122 12272

MAX HAIL SIZE...0.25 IN
MAX WIND GUST...30 MPH

MKK

Special weather statement, Jul 31, 7:21 PM PDT, 0 minutes before

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The office that day

Everything else NWS Eureka, CA issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jul 31, 5:12 PM PDT	Special Weather Statement	EKA	Trinity	33 min
Jul 31, 5:43 PM PDT	Special Weather Statement	EKA	Siskiyou	32 min
Jul 31, 6:11 PM PDT	Severe Thunderstorm Warning	EKA	Trinity	49 min
Jul 31, 7:42 PM PDT	Special Weather Statement	EKA	Shasta	33 min
Aug 1, 1:29 PM PDT	Special Weather Statement	EKA	Trinity	31 min
Aug 1, 2:00 PM PDT	Special Weather Statement	EKA	Trinity	30 min
Aug 1, 2:18 PM PDT	Special Weather Statement	EKA	Trinity	27 min
Aug 1, 2:25 PM PDT	Special Weather Statement	EKA	Del Norte	35 min
Aug 1, 2:30 PM PDT	Special Weather Statement	EKA	Trinity	30 min
Aug 1, 2:34 PM PDT	Special Weather Statement	EKA	Siskiyou	26 min
Aug 1, 2:50 PM PDT	Special Weather Statement	EKA	Trinity	25 min
Aug 1, 3:00 PM PDT	Special Weather Statement	EKA	Trinity	30 min
Aug 1, 3:07 PM PDT	Special Weather Statement	EKA	Trinity	23 min
Aug 1, 3:13 PM PDT	Severe Thunderstorm Warning	EKA	Trinity	32 min
Aug 1, 3:38 PM PDT	Special Weather Statement	EKA	Trinity	22 min
Aug 1, 3:49 PM PDT	Special Weather Statement	EKA	Trinity	26 min
Aug 1, 3:51 PM PDT	Special Weather Statement	EKA	Trinity	24 min
Aug 1, 4:07 PM PDT	Special Weather Statement	EKA	Trinity	23 min
Aug 1, 4:32 PM PDT	Special Weather Statement	EKA	Trinity	13 min
Aug 1, 4:44 PM PDT	Special Weather Statement	EKA	Trinity	31 min
Aug 1, 4:58 PM PDT	Special Weather Statement	EKA	Trinity	32 min

Nearby

Special Weather Statements in California, 2025 Every special weather statement 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.