Alert archive / Arizona / Flash Flood Watches in 2006

Flash Flood Watch 8, NWS Las Vegas, NV

August 11, 2006Mohave County, Arizona

NWS Las Vegas, NV issued this flash flood watch at Aug 11, 2006, 10:58 AM MST for Mohave County, Arizona. It took effect at Aug 11, 2006, 12:00 PM MST. It was in force for 7 hr.

The area

The counties it named.

The facts

Issued: Aug 11, 2006, 10:58 AM MST (17:58 UTC)
In effect from: Aug 11, 2006, 12:00 PM MST
Expired: Aug 11, 2006, 7:27 PM MST
In force: 7 hr
Issued by: NWS Las Vegas, NV
Flood severity: None

County Mohave County, AZ

The radar

The Las Vegas radar (KESX), 102 km from the middle of the area, began a volume at 17:57 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

Flgstf/Belemont, AZ (KFGZ), launched 12:00Z, 6.0 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: 552 J/kg
Mixed-layer CIN: -49 J/kg
Mixed-layer LCL: 1192 m above ground
0-6 km bulk shear: 2 kt
0-1 km storm-relative helicity: -22 m²/s²
0-3 km storm-relative helicity: -4 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 flash flood 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 flash flood watch went out at Aug 11, 2:50 AM MST, 8 hours 8 minutes earlier.

Area forecast discussion, Aug 11, 2:50 AM MST, 8 hours 8 minutes before

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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
Aug 11, 1:11 PM MST	Severe Thunderstorm Warning	VEF	Mohave	49 min
Aug 11, 1:12 PM MST	Flash Flood Warning	VEF	Mohave	2 hr

Nearby

Flash Flood Watches in Arizona, 2006 Every flash flood watch in 2006

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.