Alert archive / Maine / Heat Advisories in 2011

Heat Advisory 2, NWS Gray, ME

July 21, 201111 counties in Maine; 5 counties in New Hampshire

NWS Gray, ME issued this heat advisory at Jul 21, 2011, 8:08 PM EDT for 11 counties in Maine; 5 counties in New Hampshire. It took effect at Jul 22, 2011, 12:00 PM EDT. It was in force for 7 hr.

The area

The counties it named.

The facts

Issued
Jul 21, 2011, 8:08 PM EDT (00:08 UTC)
In effect from
Jul 22, 2011, 12:00 PM EDT
Expired
Jul 22, 2011, 6:31 PM EDT
In force
7 hr
Issued by
NWS Gray, ME

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, Merrimack County, NH, Rockingham County, NH, Strafford County, NH

The radar

The Portland,ME radar (KGYX), 17 km from the middle of the area, began a volume at 00:07 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 00:00Z, 0.1 hours before the alert went out and 17 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-pSkew-T log-p diagram, Gray, ME at 00:00Z on 2011-07-22Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2051 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Gray, ME at 00:00Z on 2011-07-22The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 211 square meters per square second.193958Sfc1 km3 km6 km9 kmRMLM
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
2051 J/kg
Mixed-layer CIN
-25 J/kg
Mixed-layer LCL
1512 m above ground
0-6 km bulk shear
30 kt
0-1 km storm-relative helicity
211 m²/s²
0-3 km storm-relative helicity
370 m²/s²
Significant tornado parameter
1.6
Supercell composite
20.0

Open this sounding in Storm Lab

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 21, 11:35 PM EDTSpecial Weather StatementGYXWaldo40 min
Jul 22, 4:30 AM EDTExcessive Heat WarningGYXAndroscoggin, Cumberland, Kennebec, Sagadahoc, York14 hr

Nearby

Heat Advisories in Maine, 2011Heat Advisories in New Hampshire, 2011Every heat 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.