Alert archive / Maine / Wind Chill Advisories in 2017

Wind Chill Advisory 7, NWS Gray, ME

December 30, 20178 counties in Maine; 8 counties in New Hampshire

NWS Gray, ME issued this wind chill advisory at Dec 30, 2017, 3:22 AM EST for 8 counties in Maine; 8 counties in New Hampshire. It took effect at Dec 31, 2017, 12:00 AM EST. It was in force for 3 hr.

The area

The counties it named.

The facts

Issued: Dec 30, 2017, 3:22 AM EST (08:22 UTC)
In effect from: Dec 31, 2017, 12:00 AM EST
Expired: Dec 31, 2017, 3:24 AM EST
In force: 3 hr
Issued by: NWS Gray, ME

Counties Androscoggin County, ME, Cumberland County, ME, Franklin County, ME, Kennebec County, ME, Oxford 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, Merrimack County, NH, Strafford County, NH, Sullivan County, NH

The radar

The Portland,ME radar (KGYX), 52 km from the middle of the area, began a volume at 08:23 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 00:00Z, 8.4 hours before the alert went out and 280 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: 1260 m above ground
0-6 km bulk shear: 64 kt
0-1 km storm-relative helicity: 57 m²/s²
0-3 km storm-relative helicity: 76 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 wind chill advisory 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 wind chill advisory went out at Dec 29, 10:48 PM EST, 4 hours 34 minutes earlier.

Area forecast discussion, Dec 29, 10:48 PM EST, 4 hours 34 minutes before

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Hazardous weather outlook, Dec 30, 3:01 AM EST, 21 minutes before

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In the hours before

Special weather statement, Dec 29, 11:25 PM EST, 3 hours 57 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 30, 2:52 PM EST	Small Craft Advisory	GYX		4 days
Dec 30, 2:52 PM EST	Heavy Freezing Spray Advisory	GYX		72 hr
Dec 30, 3:31 PM EST	Wind Chill Warning	GYX	Franklin, Oxford, Somerset	63 hr

Nearby

Wind Chill Advisories in Maine, 2017 Wind Chill Advisories in New Hampshire, 2017 Every wind chill advisory 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.