Alert archive / Maryland / High Wind Watches in 2016

High Wind Watch 1, NWS Baltimore/Washington

April 1, 20169 counties in Virginia; 12 counties in Maryland; 6 counties in West Virginia

NWS Baltimore/Washington issued this high wind watch at Apr 1, 2016, 2:29 PM EDT for 9 counties in Virginia; 12 counties in Maryland; 6 counties in West Virginia. It took effect at Apr 2, 2016, 10:00 PM EDT. It was in force for .

The area

The counties it named.

The facts

Issued: Apr 1, 2016, 2:29 PM EDT (18:29 UTC)
In effect from: Apr 2, 2016, 10:00 PM EDT
Expired: Apr 2, 2016, 4:10 AM EDT
In force
Issued by: NWS Baltimore/Washington

All 27 counties

Allegany County, MD, Anne Arundel County, MD, Baltimore County, MD, Calvert County, MD, Carroll County, MD, City of Baltimore, MD, Frederick County, MD, Harford County, MD, Howard County, MD, Montgomery County, MD, Prince George's County, MD, Washington County, MD, Arlington County, VA, City of Alexandria, VA, City of Fairfax, VA, City of Falls Church, VA, City of Winchester, VA, Clarke County, VA, Fairfax County, VA, Frederick County, VA, Loudoun County, VA, Berkeley County, WV, Grant County, WV, Hampshire County, WV, Jefferson County, WV, Mineral County, WV, Morgan County, WV

The radar

The Sterling radar (KLWX), 25 km from the middle of the area, began a volume at 18:32 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, 6.5 hours before the alert went out and 30 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: 136 J/kg
Mixed-layer CIN: -172 J/kg
Mixed-layer LCL: 1035 m above ground
0-6 km bulk shear: 39 kt
0-1 km storm-relative helicity: 124 m²/s²
0-3 km storm-relative helicity: 136 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.1

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this high wind 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 high wind watch went out at Apr 1, 10:04 AM EDT, 4 hours 25 minutes earlier.

Area forecast discussion, Apr 1, 10:04 AM EDT, 4 hours 25 minutes before

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Hazardous weather outlook, Apr 1, 6:02 AM EDT, 8 hours 27 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
Apr 1, 4:21 AM EDT	Small Craft Advisory	LWX		38 hr
Apr 1, 2:11 PM EDT	Gale Warning	LWX		33 hr
Apr 1, 2:29 PM EDT	Freeze Watch	LWX	Albemarle, Amherst, Augusta, Clarke, Fauquier, Frederick and 14 more	14 hr
Apr 1, 4:01 PM EDT	Severe Thunderstorm Warning	LWX	Albemarle, Nelson, City of Charlottesville	29 min
Apr 1, 4:49 PM EDT	Severe Thunderstorm Warning	LWX	Loudoun	14 min
Apr 1, 7:21 PM EDT	Special Marine Warning	LWX		84 min

Nearby

High Wind Watches in Maryland, 2016 High Wind Watches in Virginia, 2016 High Wind Watches in West Virginia, 2016 Every high wind 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.