Alert archive / Maryland / Winter Storm Warnings in 2017

Winter Storm Warning 1, NWS Baltimore/Washington

January 6, 2017Calvert County, Saint Mary's County, Maryland

NWS Baltimore/Washington issued this winter storm warning at Jan 6, 2017, 7:13 AM EST for Calvert County, Saint Mary's County, Maryland. It took effect at Jan 7, 2017, 1:00 AM EST. It was in force for 16 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 6, 2017, 7:13 AM EST (12:13 UTC)
In effect from: Jan 7, 2017, 1:00 AM EST
Expired: Jan 7, 2017, 4:53 PM EST
In force: 16 hr
Issued by: NWS Baltimore/Washington

Counties Calvert County, MD, Saint Mary's County, MD

The radar

The Sterling radar (KLWX), 107 km from the middle of the area, began a volume at 12:11 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

Wallops Is Stn, VA (KWAL), launched 12:00Z, 0.2 hours before the alert went out and 111 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 1234 m above ground
0-6 km bulk shear: 81 kt
0-1 km storm-relative helicity: -8 m²/s²
0-3 km storm-relative helicity: 207 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 winter storm 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 winter storm warning went out at Jan 6, 3:56 AM EST, 3 hours 17 minutes earlier.

Area forecast discussion, Jan 6, 3:56 AM EST, 3 hours 17 minutes before

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Hazardous weather outlook, Jan 6, 5:08 AM EST, 2 hours 5 minutes before

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In the hours before

Local storm report, Jan 6, 4:53 AM EST, 2 hours 20 minutes before

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Local storm report, Jan 6, 5:09 AM EST, 2 hours 4 minutes before

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Local storm report, Jan 6, 5:45 AM EST, 1 hour 28 minutes before

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Local storm report, Jan 6, 6:00 AM EST, 1 hour 13 minutes before

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Local storm report, Jan 6, 6:23 AM EST, 50 minutes before

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Local storm report, Jan 6, 6:24 AM EST, 49 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
Jan 6, 5:02 AM EST	Small Craft Advisory	LWX		3 days
Jan 6, 8:48 AM EST	Winter Weather Advisory	LWX	Albemarle, Amherst, Arlington, Augusta, Culpeper, Fairfax and 20 more	30 hr
Jan 6, 2:12 PM EST	Wind Chill Advisory	LWX	Albemarle, Amherst, Augusta, Greene, Highland, Madison and 9 more	61 hr

Nearby

Winter Storm Warnings in Maryland, 2017 Every winter storm warning in 2017

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.