Alert archive / Maryland / Winter Storm Warnings in 2018

Winter Storm Warning 4, NWS Baltimore/Washington

March 6, 2018Baltimore County, Harford County, Maryland

NWS Baltimore/Washington issued this winter storm warning at Mar 6, 2018, 10:52 PM EST for Baltimore County, Harford County, Maryland. It was in force for 13 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: Mar 6, 2018, 10:52 PM EST (03:52 UTC)
Expired: Mar 7, 2018, 11:50 AM EST
In force: 13 hr
Issued by: NWS Baltimore/Washington

Counties Baltimore County, MD, Harford County, MD

The radar

The Sterling radar (KLWX), 105 km from the middle of the area, began a volume at 03:56 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 00:00Z, 3.9 hours before the alert went out and 101 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: 1167 m above ground
0-6 km bulk shear: 70 kt
0-1 km storm-relative helicity: 204 m²/s²
0-3 km storm-relative helicity: 234 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 Mar 6, 10:12 PM EST, 40 minutes earlier.

Area forecast discussion, Mar 6, 10:12 PM EST, 40 minutes before

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In the hours before

Local storm report, Mar 6, 10:22 PM EST, 30 minutes before

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Local storm report, Mar 6, 10:23 PM EST, 29 minutes before

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Local storm report, Mar 6, 10:27 PM EST, 25 minutes before

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Local storm report, Mar 6, 10:28 PM EST, 24 minutes before

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Local storm report, Mar 6, 10:43 PM EST, 9 minutes before

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Local storm report, Mar 6, 10:45 PM EST, 7 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
Mar 7, 1:33 PM EST	Small Craft Advisory	LWX		35 hr
Mar 7, 2:59 AM EST	Coastal Flood Advisory	LWX	Calvert	18 hr

Nearby

Winter Storm Warnings in Maryland, 2018 Every winter storm warning in 2018

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.