Alert archive / Arizona / Winter Storm Watches in 2011

Winter Storm Watch 7, NWS Las Vegas, NV

April 6, 2011Mohave County, Arizona

NWS Las Vegas, NV issued this winter storm watch at Apr 6, 2011, 3:10 PM MST for Mohave County, Arizona. It took effect at Apr 8, 2011, 5:00 AM MST. It was in force for .

The area

The counties it named.

The facts

Issued: Apr 6, 2011, 3:10 PM MST (22:10 UTC)
In effect from: Apr 8, 2011, 5:00 AM MST
Expired: Apr 7, 2011, 2:47 PM MST
In force
Issued by: NWS Las Vegas, NV

County Mohave County, AZ

The radar

The Las Vegas radar (KESX), 102 km from the middle of the area, began a volume at 22:12 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

Flgstf/Belemont, AZ (KFGZ), launched 12:00Z, 10.2 hours before the alert went out and 185 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: 2592 m above ground
0-6 km bulk shear: 46 kt
0-1 km storm-relative helicity: 252 m²/s²
0-3 km storm-relative helicity: 290 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 winter storm 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 winter storm watch went out at Apr 6, 3:00 PM MST, 10 minutes earlier.

Area forecast discussion, Apr 6, 3:00 PM MST, 10 minutes before

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Hazardous weather outlook, Apr 6, 6:33 AM MST, 8 hours 37 minutes before

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        The site you requested is temporarily down for maintenance or an unexpected outage.
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        Please try again in a few minutes.
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The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 5, 5:05 PM MST	High Wind Watch	VEF	Clark, Lincoln, Nye	23 hr
Apr 6, 4:15 AM MST	High Wind Warning	VEF	Clark, Esmeralda, Lincoln, Nye	43 hr
Apr 5, 5:05 PM MST	High Wind Watch	VEF	Inyo	11 hr
Apr 6, 4:15 AM MST	Wind Advisory	VEF	Inyo	12 hr
Apr 6, 3:10 PM MST	Winter Weather Advisory	VEF	Inyo	24 hr
Apr 6, 4:30 PM MST	Wind Advisory	VEF	San Bernardino	30 hr

Nearby

Winter Storm Watches in Arizona, 2011 Every winter storm watch in 2011

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.