Alert archive / Virginia / Flash Flood Watches in 2016

Flash Flood Watch 4, NWS Baltimore/Washington

June 5, 201616 counties in Virginia

NWS Baltimore/Washington issued this flash flood watch at Jun 5, 2016, 10:08 AM EDT for 16 counties in Virginia. It took effect at Jun 5, 2016, 1:00 PM EDT. It was in force for 6 hr.

The area

The counties it named.

The facts

Issued: Jun 5, 2016, 10:08 AM EDT (14:08 UTC)
In effect from: Jun 5, 2016, 1:00 PM EDT
Expired: Jun 5, 2016, 6:33 PM EDT
In force: 6 hr
Issued by: NWS Baltimore/Washington
Flood severity: None

Counties Albemarle County, VA, Amherst County, VA, Augusta County, VA, City of Charlottesville, VA, City of Harrisonburg, VA, City of Staunton, VA, City of Waynesboro, VA, Greene County, VA, Madison County, VA, Nelson County, VA, Page County, VA, Rappahannock County, VA, Rockbridge County, VA, Rockingham County, VA, Shenandoah County, VA, Warren County, VA

The radar

The Sterling radar (KLWX), 132 km from the middle of the area, began a volume at 14:11 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

Washington/Dulle, VA (KIAD), launched 12:00Z, 2.1 hours before the alert went out and 137 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: 60 J/kg
Mixed-layer CIN: -155 J/kg
Mixed-layer LCL: 752 m above ground
0-6 km bulk shear: 33 kt
0-1 km storm-relative helicity: 92 m²/s²
0-3 km storm-relative helicity: 93 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 watch 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 watch went out at Jun 5, 3:59 AM EDT, 6 hours 9 minutes earlier.

Area forecast discussion, Jun 5, 3:59 AM EDT, 6 hours 9 minutes before

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Hazardous weather outlook, Jun 5, 9:11 AM EDT, 57 minutes before

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In the hours before

Local storm report, Jun 5, 5:31 AM EDT, 4 hours 37 minutes before

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Local storm report, Jun 5, 8:00 AM EDT, 2 hours 8 minutes before

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Local storm report, Jun 5, 9:30 AM EDT, 38 minutes before

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Local storm report, Jun 5, 9:33 AM EDT, 35 minutes before

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Local storm report, Jun 5, 9:38 AM EDT, 30 minutes before

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Local storm report, Jun 5, 9:48 AM EDT, 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 4, 9:33 PM EDT	Coastal Flood Advisory	LWX	Arlington, City of Alexandria, City of Falls Church	13 hr
Jun 4, 9:35 PM EDT	Flash Flood Warning	LWX	Albemarle, Nelson	5 hr
Jun 4, 10:16 PM EDT	Severe Thunderstorm Warning	LWX	Albemarle, Nelson, City of Charlottesville	44 min
Jun 4, 11:38 PM EDT	Areal Flood Warning	LWX	Page, Rockingham, Shenandoah, City of Harrisonburg	13 hr
Jun 5, 2:32 AM EDT	Areal Flood Warning	LWX	Albemarle, Nelson	9 hr
Jun 5, 2:40 PM EDT	Severe Thunderstorm Warning	LWX	Frederick, Loudoun	53 min
Jun 5, 3:58 PM EDT	Special Marine Warning	LWX		92 min
Jun 5, 4:15 PM EDT	Special Marine Warning	LWX		90 min
Jun 5, 4:30 PM EDT	Severe Thunderstorm Warning	LWX	Albemarle, Nelson	45 min
Jun 5, 5:15 PM EDT	Special Marine Warning	LWX		90 min
Jun 5, 5:23 PM EDT	Special Marine Warning	LWX		97 min
Jun 5, 6:19 PM EDT	Special Marine Warning	LWX		86 min
Jun 5, 7:22 PM EDT	Special Marine Warning	LWX		53 min
Jun 5, 3:13 PM EDT	Severe Thunderstorm Warning	LWX	Baltimore, Carroll, Frederick, Washington	48 min
Jun 5, 3:52 PM EDT	Severe Thunderstorm Warning	LWX	Baltimore, Carroll, Frederick, Harford, Howard, Montgomery and 1 more	38 min
Jun 5, 4:22 PM EDT	Severe Thunderstorm Warning	LWX	Anne Arundel, Baltimore, Carroll, Harford, Howard, Montgomery and 1 more	53 min

Nearby

Flash Flood Watches in Virginia, 2016 Every flash flood watch in 2016

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.