Alert archive / California / Heat Advisories in 2023

Heat Advisory 3, NWS Eureka, CA

July 19, 2023Lake County, California

NWS Eureka, CA issued this heat advisory at Jul 19, 2023, 1:17 PM PDT for Lake County, California. It took effect at Jul 21, 2023, 11:00 AM PDT. It was in force for 34 hr.

The area

The counties it named.

The facts

Issued: Jul 19, 2023, 1:17 PM PDT (20:17 UTC)
In effect from: Jul 21, 2023, 11:00 AM PDT
Expired: Jul 22, 2023, 9:28 PM PDT
In force: 34 hr
Issued by: NWS Eureka, CA

County Lake County, CA

The nearest sounding before it

Medford/Jackson, OR (KMFR), launched 12:00Z, 8.3 hours before the alert went out and 364 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: 2243 m above ground
0-6 km bulk shear: 12 kt
0-1 km storm-relative helicity: -1 m²/s²
0-3 km storm-relative helicity: 87 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 heat advisory 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 heat advisory went out at Jul 19, 5:38 AM PDT, 7 hours 39 minutes earlier.

Area forecast discussion, Jul 19, 5:38 AM PDT, 7 hours 39 minutes before

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Hazardous weather outlook, Jul 19, 3:18 AM PDT, 9 hours 59 minutes before

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Nearby

Heat Advisories in California, 2023 Every heat advisory in 2023

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.