Alert archive / Maine / Winter Storm Watches in 2017

Winter Storm Watch 13, NWS Gray, ME

December 23, 201711 counties in Maine; 10 counties in New Hampshire

NWS Gray, ME issued this winter storm watch at Dec 23, 2017, 2:59 PM EST for 11 counties in Maine; 10 counties in New Hampshire. It took effect at Dec 24, 2017, 10:00 PM EST. It was in force for .

The area

The counties it named.

The facts

Issued: Dec 23, 2017, 2:59 PM EST (19:59 UTC)
In effect from: Dec 24, 2017, 10:00 PM EST
Expired: Dec 24, 2017, 2:51 AM EST
In force
Issued by: NWS Gray, ME

All 21 counties

Androscoggin County, ME, Cumberland County, ME, Franklin County, ME, Kennebec County, ME, Knox County, ME, Lincoln County, ME, Oxford County, ME, Sagadahoc County, ME, Somerset County, ME, Waldo County, ME, York County, ME, Belknap County, NH, Carroll County, NH, Cheshire County, NH, Coos County, NH, Grafton County, NH, Hillsborough County, NH, Merrimack County, NH, Rockingham County, NH, Strafford County, NH, Sullivan County, NH

The radar

The Portland,ME radar (KGYX), 39 km from the middle of the area, began a volume at 20:02 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

Albany, NY (KALY), launched 12:00Z, 8.0 hours before the alert went out and 285 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: 508 m above ground
0-6 km bulk shear: 57 kt
0-1 km storm-relative helicity: 222 m²/s²
0-3 km storm-relative helicity: 260 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 watch went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Gray, ME wrote its last area forecast discussion before this winter storm watch went out at Dec 23, 11:10 AM EST, 3 hours 49 minutes earlier.

Area forecast discussion, Dec 23, 11:10 AM EST, 3 hours 49 minutes before

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Hazardous weather outlook, Dec 23, 11:01 AM EST, 3 hours 58 minutes before

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In the hours before

Local storm report, Dec 23, 12:39 PM EST, 2 hours 20 minutes before

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Local storm report, Dec 23, 12:43 PM EST, 2 hours 16 minutes before

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Local storm report, Dec 23, 1:19 PM EST, 1 hour 40 minutes before

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Local storm report, Dec 23, 1:27 PM EST, 1 hour 32 minutes before

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Local storm report, Dec 23, 1:30 PM EST, 1 hour 29 minutes before

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Local storm report, Dec 23, 1:31 PM EST, 1 hour 28 minutes before

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The office that day

Everything else NWS Gray, ME issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Dec 23, 10:59 AM EST	Gale Warning	GYX		4 hr

Nearby

Winter Storm Watches in Maine, 2017 Winter Storm Watches in New Hampshire, 2017 Every winter storm watch 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.