Alert archive / Oregon / Heat Advisories in 2021

Heat Advisory 3, NWS Pendleton, OR

July 2, 202111 counties in Oregon; 7 counties in Washington

NWS Pendleton, OR issued this heat advisory at Jul 2, 2021, 1:43 PM PDT for 11 counties in Oregon; 7 counties in Washington. It was in force for 54 hr.

The area

The counties it named.

The facts

Issued: Jul 2, 2021, 1:43 PM PDT (20:43 UTC)
Expired: Jul 4, 2021, 8:00 PM PDT
In force: 54 hr
Issued by: NWS Pendleton, OR

Counties Crook County, OR, Deschutes County, OR, Gilliam County, OR, Grant County, OR, Jefferson County, OR, Morrow County, OR, Sherman County, OR, Umatilla County, OR, Union County, OR, Wasco County, OR, Wheeler County, OR, Benton County, WA, Columbia County, WA, Franklin County, WA, Kittitas County, WA, Klickitat County, WA, Walla Walla County, WA, Yakima County, WA

The radar

The Pendleton radar (KPDT), 80 km from the middle of the area, began a volume at 20:41 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

Boise Airport, ID (KBOI), launched 12:00Z, 8.7 hours before the alert went out and 360 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: 7 J/kg
Mixed-layer CIN: -390 J/kg
Mixed-layer LCL: 2795 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: 50 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 Pendleton, OR wrote its last area forecast discussion before this heat advisory went out at Jul 1, 3:57 PM PDT, 21 hours 46 minutes earlier.

Area forecast discussion, Jul 1, 3:57 PM PDT, 21 hours 46 minutes before

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Nearby

Heat Advisories in Oregon, 2021 Heat Advisories in Washington, 2021 Every heat advisory in 2021

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.