Alert archive / Virginia / Flash Flood Warnings in 2019

Flash Flood Warning 32, NWS Baltimore/Washington

August 1, 2019Orange County, Spotsylvania County, Virginia

NWS Baltimore/Washington issued this flash flood warning at Aug 1, 2019, 9:50 PM EDT for Orange County, Spotsylvania County, Virginia. It was in force for 96 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: Aug 1, 2019, 9:50 PM EDT (01:50 UTC)
Expired: Aug 1, 2019, 11:26 PM EDT
In force: 96 min
Issued by: NWS Baltimore/Washington
Area: Storm-based polygon
Flood severity: None

Counties Orange County, VA, Spotsylvania County, VA

The radar

The Sterling radar (KLWX), 90 km from the middle of the area, began a volume at 01:52 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, 1.8 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: 176 J/kg
Mixed-layer CIN: -130 J/kg
Mixed-layer LCL: 1312 m above ground
0-6 km bulk shear: 19 kt
0-1 km storm-relative helicity: 11 m²/s²
0-3 km storm-relative helicity: 9 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 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 Aug 1, 2:52 PM EDT, 6 hours 58 minutes earlier.

Area forecast discussion, Aug 1, 2:52 PM EDT, 6 hours 58 minutes before

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Hazardous weather outlook, Aug 1, 2:14 PM EDT, 7 hours 36 minutes before

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In the hours before

Local storm report, Aug 1, 5:36 PM EDT, 4 hours 14 minutes before

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Local storm report, Aug 1, 6:04 PM EDT, 3 hours 46 minutes before

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Local storm report, Aug 1, 6:44 PM EDT, 3 hours 6 minutes before

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Local storm report, Aug 1, 6:55 PM EDT, 2 hours 55 minutes before

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Local storm report, Aug 1, 6:57 PM EDT, 2 hours 53 minutes before

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Local storm report, Aug 1, 7:05 PM EDT, 2 hours 45 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
Aug 1, 8:47 PM EDT	Severe Thunderstorm Warning	LWX	Albemarle, City of Charlottesville	43 min
Aug 1, 8:57 PM EDT	Severe Thunderstorm Warning	LWX	Orange, Spotsylvania	48 min
Aug 1, 9:38 PM EDT	Severe Thunderstorm Warning	LWX	Orange, Spotsylvania	35 min
Aug 1, 10:37 PM EDT	Severe Thunderstorm Warning	LWX	Albemarle, City of Charlottesville	23 min
Aug 1, 10:53 PM EDT	Areal Flood Warning	LWX	Albemarle, City of Charlottesville	3 hr
Aug 2, 2:12 AM EDT	Severe Thunderstorm Warning	LWX	King George	48 min
Aug 2, 2:14 AM EDT	Special Marine Warning	LWX		61 min
Aug 2, 3:09 AM EDT	Special Marine Warning	LWX		96 min
Aug 2, 3:15 AM EDT	Special Marine Warning	LWX		90 min
Aug 2, 7:55 AM EDT	Special Marine Warning	LWX		33 min
Aug 2, 8:51 AM EDT	Special Marine Warning	LWX		29 min
Aug 2, 9:53 AM EDT	Special Marine Warning	LWX		19 min
Aug 2, 3:50 PM EDT	Special Marine Warning	LWX		55 min
Aug 2, 5:33 PM EDT	Special Marine Warning	LWX		27 min
Aug 2, 6:30 PM EDT	Special Marine Warning	LWX		15 min

Nearby

Flash Flood Warnings in Virginia, 2019 Every flash flood warning in 2019

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.