Alert archive / Nevada / Excessive Heat Warnings in 2017

Excessive Heat Warning 1, NWS Reno, NV

August 2, 20177 counties in Nevada; 4 counties in California

NWS Reno, NV issued this excessive heat warning at Aug 2, 2017, 2:57 AM PDT for 7 counties in Nevada; 4 counties in California. It was in force for 38 hr. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued
Aug 2, 2017, 2:57 AM PDT (09:57 UTC)
Expired
Aug 3, 2017, 5:09 PM PDT
In force
38 hr
Issued by
NWS Reno, NV

Counties Lassen County, CA, Modoc County, CA, Plumas County, CA, Sierra County, CA, Churchill County, NV, Douglas County, NV, Lyon County, NV, Mineral County, NV, Pershing County, NV, Storey County, NV, Washoe County, NV

The radar

The Reno radar (KRGX), 18 km from the middle of the area, began a volume at 09:57 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

Reno, NV (KREV), launched 00:00Z, 10.0 hours before the alert went out and 126 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-pSkew-T log-p diagram, Reno, NV at 00:00Z on 2017-08-02Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 61 joules per kilogram.LCLEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Reno, NV at 00:00Z on 2017-08-02The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 28 square meters per square second.1939Sfc1 km3 km6 km9 kmRMLM
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
61 J/kg
Mixed-layer CIN
-14 J/kg
Mixed-layer LCL
4242 m above ground
0-6 km bulk shear
10 kt
0-1 km storm-relative helicity
28 m²/s²
0-3 km storm-relative helicity
15 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 excessive heat warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Reno, NV wrote its last area forecast discussion before this excessive heat warning went out at Aug 2, 2:12 AM PDT, 45 minutes earlier.

Area forecast discussion, Aug 2, 2:12 AM PDT, 45 minutes before
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The office that day

Everything else NWS Reno, NV issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Aug 1, 5:14 PM PDTSpecial Weather StatementREV46 min
Aug 2, 2:45 PM PDTSpecial Weather StatementREVDouglas, Storey2 hr
Aug 2, 3:22 PM PDTSpecial Weather StatementREV23 min
Aug 2, 4:34 PM PDTSpecial Weather StatementREV41 min
Aug 2, 3:37 PM PDTSevere Thunderstorm WarningREVPlacer23 min
Aug 2, 4:41 PM PDTSevere Thunderstorm WarningREVEl Dorado, Placer34 min

Nearby

Excessive Heat Warnings in Nevada, 2017Excessive Heat Warnings in California, 2017Every excessive heat warning in 2017

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.