Alert archive / Nevada / Excessive Heat Watches in 2021

Excessive Heat Watch 4, NWS Las Vegas, NV

July 5, 20214 counties in Nevada; Inyo County, San Bernardino County, California; Mohave County, Arizona

NWS Las Vegas, NV issued this excessive heat watch at Jul 5, 2021, 1:04 PM PDT for 4 counties in Nevada; Inyo County, San Bernardino County, California; Mohave County, Arizona. It took effect at Jul 7, 2021, 8:00 AM PDT. It was in force for .

The area

The counties it named.

The facts

Issued: Jul 5, 2021, 1:04 PM PDT (20:04 UTC)
In effect from: Jul 7, 2021, 8:00 AM PDT
Expired: Jul 6, 2021, 1:37 PM PDT
In force
Issued by: NWS Las Vegas, NV

Counties Mohave County, AZ, Inyo County, CA, San Bernardino County, CA, Clark County, NV, Esmeralda County, NV, Lincoln County, NV, Nye County, NV

The radar

The Las Vegas radar (KESX), 142 km from the middle of the area, began a volume at 20:05 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 12:00Z, 8.1 hours before the alert went out and 379 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: 3350 m above ground
0-6 km bulk shear: 10 kt
0-1 km storm-relative helicity: -29 m²/s²
0-3 km storm-relative helicity: 2 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 watch went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Las Vegas, NV wrote its last area forecast discussion before this excessive heat watch went out at Jul 5, 8:15 AM PDT, 4 hours 49 minutes earlier.

Area forecast discussion, Jul 5, 8:15 AM PDT, 4 hours 49 minutes before

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Nearby

Excessive Heat Watches in Nevada, 2021 Excessive Heat Watches in California, 2021 Excessive Heat Watches in Arizona, 2021 Every excessive heat watch 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.