Alert archive / Virginia / Flash Flood Warnings in 2010

Flash Flood Warning 2, NWS Baltimore/Washington

January 24, 20106 counties in Virginia

NWS Baltimore/Washington issued this flash flood warning at Jan 24, 2010, 11:54 PM EST for 6 counties in Virginia. It was in force for 9 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
Jan 24, 2010, 11:54 PM EST (04:54 UTC)
Expired
Jan 25, 2010, 8:45 AM EST
In force
9 hr
Issued by
NWS Baltimore/Washington
Area
Storm-based polygon
Flood severity
None

Counties Albemarle County, VA, Augusta County, VA, City of Charlottesville, VA, Greene County, VA, Nelson County, VA, Rockingham County, VA

The radar

The Sterling radar (KLWX), 143 km from the middle of the area, began a volume at 04:53 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

Roanoke, VA (KRNK), launched 00:00Z, 4.9 hours before the alert went out and 124 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-pSkew-T log-p diagram, Roanoke, VA at 00:00Z on 2010-01-25Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Roanoke, VA at 00:00Z on 2010-01-25The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 920 square meters per square second.1939587897Sfc1 km3 km6 km9 kmRMLM
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
439 m above ground
0-6 km bulk shear
66 kt
0-1 km storm-relative helicity
920 m²/s²
0-3 km storm-relative helicity
1028 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.2

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 Jan 24, 10:45 PM EST, 1 hour 9 minutes earlier.

Area forecast discussion, Jan 24, 10:45 PM EST, 1 hour 9 minutes before
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Hazardous weather outlook, Jan 24, 11:13 PM EST, 41 minutes before
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    <section class="card" role="status" aria-live="polite">
      <div class="status" id="status">Temporary Notice</div>
      <h1 id="headline">This service is currently unavailable.</h1>
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        The site you requested is temporarily down for maintenance or an unexpected outage.
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The office that day

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

IssuedProductOfficeCountiesLasted
Jan 24, 10:58 PM ESTFlash Flood WarningLWXAugusta, Highland, Rockingham, City of Harrisonburg, City of Staunton, City of Waynesboro9 hr
Jan 25, 2:11 AM ESTFlash Flood WarningLWXPage, Rockingham, Shenandoah6 hr
Jan 25, 2:34 AM ESTFlash Flood WarningLWXCulpeper, Greene, Madison, Orange, Rappahannock6 hr
Jan 25, 3:19 AM ESTFlash Flood WarningLWXCulpeper, Fauquier, Orange, Rappahannock, Warren6 hr
Jan 25, 4:11 AM ESTSmall Craft AdvisoryLWX48 hr
Jan 25, 6:35 AM ESTRiver Flood WarningLWXAugusta, City of Waynesboro11 hr
Jan 25, 7:57 AM ESTAreal Flood WarningLWXAugusta, Clarke, Highland, Page, Rockingham, Shenandoah and 5 more6 hr
Jan 25, 8:37 AM ESTAreal Flood WarningLWXAlbemarle, Culpeper, Greene, Madison, Nelson, Rappahannock and 1 more10 hr
Jan 25, 8:51 AM ESTAreal Flood WarningLWXFrederick, City of Winchester10 hr
Jan 25, 1:31 PM ESTRiver Flood WarningLWXCulpeper, Orange15 hr
Jan 25, 2:14 PM ESTAreal Flood WarningLWXAugusta, Clarke, Page, Rockingham, Shenandoah, Warren and 3 more10 hr
Jan 25, 3:19 PM ESTCoastal Flood AdvisoryLWXArlington, Fairfax, King George, Stafford, City of Alexandria, City of Fairfax and 1 more14 hr
Jan 25, 4:18 PM ESTRiver Flood WarningLWXFairfax54 hr
Jan 25, 4:18 PM ESTRiver Flood WarningLWXRockingham18 hr
Jan 25, 4:18 PM ESTRiver Flood WarningLWXWarren37 hr
Jan 25, 4:18 PM ESTRiver Flood WarningLWXCulpeper, Fauquier24 hr
Jan 25, 4:18 PM ESTRiver Flood WarningLWXLoudoun37 hr
Jan 25, 4:18 PM ESTRiver Flood WarningLWXLoudoun54 hr
Jan 25, 9:15 AM ESTAreal Flood WarningLWXCarroll, Frederick, Washington10 hr
Jan 25, 4:18 PM ESTRiver Flood WarningLWXFrederick24 hr
Jan 25, 4:18 PM ESTRiver Flood WarningLWXAllegany18 hr
Jan 25, 4:18 PM ESTRiver Flood WarningLWXWashington12 hr
Jan 25, 6:32 PM ESTRiver Flood WarningLWXWashington49 days
Jan 25, 6:28 AM ESTRiver Flood WarningLWXPendleton11 hr
Jan 25, 10:34 AM ESTRiver Flood WarningLWXGrant18 hr
Jan 25, 3:37 PM ESTRiver Flood WarningLWXBerkeley25 hr
Jan 25, 4:18 PM ESTRiver Flood WarningLWXHampshire24 hr
Jan 25, 4:18 PM ESTRiver Flood WarningLWXJefferson42 hr

Nearby

Flash Flood Warnings in Virginia, 2010Every flash flood warning in 2010

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.