Alert archive / Maine / Frost Advisories in 2011

Frost Advisory 3, NWS Gray, ME

September 16, 20118 counties in Maine; 7 counties in New Hampshire

NWS Gray, ME issued this frost advisory at Sep 16, 2011, 3:06 AM EDT for 8 counties in Maine; 7 counties in New Hampshire. It took effect at Sep 17, 2011, 1:00 AM EDT. It was in force for 7 hr.

The area

The counties it named.

The facts

Issued: Sep 16, 2011, 3:06 AM EDT (07:06 UTC)
In effect from: Sep 17, 2011, 1:00 AM EDT
Expired: Sep 17, 2011, 8:00 AM EDT
In force: 7 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, Grafton County, NH, Merrimack County, NH, Rockingham County, NH, Strafford County, NH, Sullivan County, NH

The radar

The Portland,ME radar (KGYX), 43 km from the middle of the area, began a volume at 07:08 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, 7.1 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: 1047 m above ground
0-6 km bulk shear: 83 kt
0-1 km storm-relative helicity: -270 m²/s²
0-3 km storm-relative helicity: -46 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 frost 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 frost advisory went out at Sep 16, 1:33 AM EDT, 1 hour 33 minutes earlier.

Area forecast discussion, Sep 16, 1:33 AM EDT, 1 hour 33 minutes before

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Hazardous weather outlook, Sep 15, 7:20 PM EDT, 7 hours 46 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
Sep 16, 3:06 AM EDT	Freeze Warning	GYX	Franklin, Oxford, Somerset	29 hr
Sep 16, 3:33 AM EDT	Gale Warning	GYX		9 hr
Sep 16, 7:23 PM EDT	Small Craft Advisory	GYX		4 hr

Nearby

Frost Advisories in Maine, 2011 Frost Advisories in New Hampshire, 2011 Every frost 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.