Alert archive / Virginia / Flash Flood Watches in 2006

Flash Flood Watch 5, NWS Blacksburg, VA

November 15, 200611 counties in Virginia; 6 counties in North Carolina

NWS Blacksburg, VA issued this flash flood watch at Nov 15, 2006, 4:37 AM EST for 11 counties in Virginia; 6 counties in North Carolina. It took effect at Nov 15, 2006, 6:00 PM EST. It was in force for 9 hr.

The area

The counties it named.

The facts

Issued: Nov 15, 2006, 4:37 AM EST (09:37 UTC)
In effect from: Nov 15, 2006, 6:00 PM EST
Expired: Nov 16, 2006, 3:17 AM EST
In force: 9 hr
Issued by: NWS Blacksburg, VA
Flood severity: None

Counties Alleghany County, NC, Ashe County, NC, Surry County, NC, Watauga County, NC, Wilkes County, NC, Yadkin County, NC, Bland County, VA, Carroll County, VA, City of Galax, VA, City of Radford, VA, Floyd County, VA, Giles County, VA, Grayson County, VA, Montgomery County, VA, Patrick County, VA, Pulaski County, VA, Wythe County, VA

The radar

The Roanoke radar (KFCX), 63 km from the middle of the area, began a volume at 09:38 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

Greensboro/Hi Pt, NC (KGSO), launched 00:00Z, 9.6 hours before the alert went out and 113 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: 2370 m above ground
0-6 km bulk shear: 44 kt
0-1 km storm-relative helicity: 27 m²/s²
0-3 km storm-relative helicity: 111 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 Blacksburg, VA wrote its last area forecast discussion before this flash flood watch went out at Nov 15, 3:52 AM EST, 45 minutes earlier.

Area forecast discussion, Nov 15, 3:52 AM EST, 45 minutes before

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Hazardous weather outlook, Nov 14, 6:50 PM EST, 9 hours 47 minutes before

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The office that day

Everything else NWS Blacksburg, VA issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Nov 15, 4:10 AM EST	High Wind Watch	RNK	Smyth, Tazewell	8 hr
Nov 15, 11:43 AM EST	High Wind Warning	RNK	Smyth, Tazewell	16 hr
Nov 15, 11:43 AM EST	Wind Advisory	RNK	Bland, Carroll, Floyd, Giles, Grayson, Montgomery and 4 more	16 hr

Nearby

Flash Flood Watches in Virginia, 2006 Flash Flood Watches in North Carolina, 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.