Alert archive / New Hampshire / Winter Weather Advisories in 2011

Winter Weather Advisory 21, NWS Gray, ME

December 14, 2011Franklin County, Oxford County, Somerset County, Maine; 6 counties in New Hampshire

NWS Gray, ME issued this winter weather advisory at Dec 14, 2011, 3:09 PM EST for Franklin County, Oxford County, Somerset County, Maine; 6 counties in New Hampshire. It took effect at Dec 15, 2011, 2:00 AM EST. It was in force for 10 hr.

The area

The counties it named.

The facts

Issued: Dec 14, 2011, 3:09 PM EST (20:09 UTC)
In effect from: Dec 15, 2011, 2:00 AM EST
Expired: Dec 15, 2011, 12:00 PM EST
In force: 10 hr
Issued by: NWS Gray, ME

Counties Franklin County, ME, Oxford County, ME, Somerset County, ME, Belknap County, NH, Carroll County, NH, Coos County, NH, Grafton County, NH, Merrimack County, NH, Sullivan County, NH

The radar

The Portland,ME radar (KGYX), 82 km from the middle of the area, began a volume at 20:09 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

Gray, ME (KGYX), launched 12:00Z, 8.2 hours before the alert went out and 82 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: 795 m above ground
0-6 km bulk shear: 38 kt
0-1 km storm-relative helicity: -22 m²/s²
0-3 km storm-relative helicity: 31 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 weather 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 winter weather advisory went out at Dec 14, 10:07 AM EST, 5 hours 2 minutes earlier.

Area forecast discussion, Dec 14, 10:07 AM EST, 5 hours 2 minutes before

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Hazardous weather outlook, Dec 14, 5:11 AM EST, 9 hours 58 minutes before

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      <div class="status" id="status">Temporary Notice</div>
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        The site you requested is temporarily down for maintenance or an unexpected outage.
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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 14, 12:40 AM EST	Small Craft Advisory	GYX		6 hr
Dec 14, 6:31 AM EST	Small Craft Advisory	GYX		33 hr

Nearby

Winter Weather Advisories in New Hampshire, 2011 Winter Weather Advisories in Maine, 2011 Every winter weather advisory in 2011

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.