Alert archive / Virginia / Flash Flood Warnings in 2014

Flash Flood Warning 31, NWS Baltimore/Washington

June 27, 2014Albemarle County, Augusta County, Virginia

NWS Baltimore/Washington issued this flash flood warning at Jun 27, 2014, 10:43 PM EDT for Albemarle County, Augusta County, Virginia. It was in force for 6 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: Jun 27, 2014, 10:43 PM EDT (02:43 UTC)
Expired: Jun 28, 2014, 5:01 AM EDT
In force: 6 hr
Issued by: NWS Baltimore/Washington
Area: Storm-based polygon
Flood severity: None

Counties Albemarle County, VA, Augusta County, VA

The radar

The Sterling radar (KLWX), 153 km from the middle of the area, began a volume at 02:43 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, 2.7 hours before the alert went out and 243 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: 210 J/kg
Mixed-layer CIN: -56 J/kg
Mixed-layer LCL: 1286 m above ground
0-6 km bulk shear: 21 kt
0-1 km storm-relative helicity: -79 m²/s²
0-3 km storm-relative helicity: -51 m²/s²
Significant tornado parameter: 0.0
Supercell composite: -0.3

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this flash flood warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Baltimore/Washington wrote its last area forecast discussion before this flash flood warning went out at Jun 27, 9:52 PM EDT, 51 minutes earlier.

Area forecast discussion, Jun 27, 9:52 PM EDT, 51 minutes before

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Hazardous weather outlook, Jun 27, 9:23 PM EDT, 1 hour 20 minutes before

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The office that day

Everything else NWS Baltimore/Washington issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jun 27, 10:09 PM EDT	Flash Flood Warning	LWX	Greene, Page, Rockingham	3 hr
Jun 27, 10:57 PM EDT	Flash Flood Warning	LWX	Greene, Madison, Page, Rappahannock	3 hr
Jun 28, 9:07 AM EDT	Coastal Flood Advisory	LWX	Arlington, City of Alexandria, City of Falls Church	88 min
Jun 27, 9:18 PM EDT	Coastal Flood Advisory	LWX	Anne Arundel	12 hr

Nearby

Flash Flood Warnings in Virginia, 2014 Every flash flood warning in 2014

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.