Bermuda high pressure dominated the region with broad southwest flow aloft. This flow ushered in hot and humid air. Temperatures across much of east central New York warmed well into the 90s with some locations reaching the century mark in the mid Hudson Valley. On Friday July 22nd in Dutchess County, Rhinebeck reached 104 degrees, Dutchess County Airport in Poughkeepsie reached 102 degrees and Mills Norre State Park came in with 100 degrees. In Columbia County, 101 degrees was reported in Hudson at the Columbia County Airport.
The most oppressive day was Thursday, July 21st, due to very high dew points in the 70s. The high humidity, combined with temperatures in the 90s, resulted in heat indices of 105 to 110 degrees up the Hudson River Valley. The New York Independent System Operator (NYISO) reported that New York State's power consumption on the 21st peaked between 4 pm and 5 pm EDT and was the third highest peak on record.
A weak boundary marked by a shift in winds and lower dew points moved southward  across east central New York on Friday, July 22nd. Dew points dropped into the 50s in the wake of the boundary. However, the boundary did not reach the mid Hudson Valley until late in the day, and this was too late to bring any relief to the oppressive heat and humidity.
The boundary dissipated across the area Friday evening. On Saturday July 23rd, temperatures warmed in the 90s, and with dew points in the upper 60s and lower 70s, resulted in heat indices of 100 to 104 degrees across the Capital District, mid Hudson Valley, southern Taconics and southeastern Catskills.

Heat in EASTERN ULSTER, NEW YORK
From 23-JUL-11 11:00:00 to 23-JUL-11 19:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Heat in WESTERN ULSTER, NEW YORK
From 23-JUL-11 11:00:00 to 23-JUL-11 19:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Excessive Heat in WESTERN COLUMBIA, NEW YORK
From 21-JUL-11 11:00:00 to 21-JUL-11 19:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Excessive Heat in EASTERN ULSTER, NEW YORK
From 21-JUL-11 11:00:00 to 21-JUL-11 19:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Excessive Heat in EASTERN GREENE, NEW YORK
From 21-JUL-11 11:00:00 to 21-JUL-11 19:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Excessive Heat in EASTERN ALBANY, NEW YORK
From 21-JUL-11 11:00:00 to 21-JUL-11 19:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

Excessive Heat in SOUTHERN SARATOGA, NEW YORK
From 21-JUL-11 11:00:00 to 21-JUL-11 19:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Excessive Heat in NORTHERN SARATOGA, NEW YORK
From 21-JUL-11 11:00:00 to 21-JUL-11 19:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Heat in SOUTHERN SARATOGA, NEW YORK
From 23-JUL-11 14:00:00 to 23-JUL-11 19:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Excessive Heat in SOUTHEAST WARREN, NEW YORK
From 21-JUL-11 11:00:00 to 21-JUL-11 19:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

Excessive Heat in SOUTHERN WASHINGTON, NEW YORK
From 21-JUL-11 11:00:00 to 21-JUL-11 19:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Heat in EASTERN GREENE, NEW YORK
From 23-JUL-11 11:00:00 to 23-JUL-11 19:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Heat in WESTERN COLUMBIA, NEW YORK
From 23-JUL-11 11:00:00 to 23-JUL-11 19:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Heat in EASTERN ALBANY, NEW YORK
From 23-JUL-11 14:00:00 to 23-JUL-11 19:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

Heat in WESTERN RENSSELAER, NEW YORK
From 23-JUL-11 14:00:00 to 23-JUL-11 19:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Excessive Heat in WESTERN RENSSELAER, NEW YORK
From 21-JUL-11 11:00:00 to 21-JUL-11 19:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Excessive Heat in EASTERN SCHENECTADY, NEW YORK
From 21-JUL-11 11:00:00 to 21-JUL-11 19:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Heat in EASTERN SCHENECTADY, NEW YORK
From 23-JUL-11 14:00:00 to 23-JUL-11 19:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Excessive Heat in EASTERN DUTCHESS, NEW YORK
From 22-JUL-11 11:00:00 to 22-JUL-11 19:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Excessive Heat in WESTERN DUTCHESS, NEW YORK
From 22-JUL-11 11:00:00 to 22-JUL-11 19:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Excessive Heat in EASTERN ULSTER, NEW YORK
From 22-JUL-11 11:00:00 to 22-JUL-11 19:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Heat in EASTERN DUTCHESS, NEW YORK
From 23-JUL-11 11:00:00 to 23-JUL-11 19:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Heat in WESTERN SCHENECTADY, NEW YORK
From 21-JUL-11 11:00:00 to 21-JUL-11 19:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Heat in SCHOHARIE, NEW YORK
From 21-JUL-11 11:00:00 to 21-JUL-11 19:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Heat in EASTERN GREENE, NEW YORK
From 22-JUL-11 11:00:00 to 22-JUL-11 19:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Heat in EASTERN COLUMBIA, NEW YORK
From 22-JUL-11 11:00:00 to 22-JUL-11 19:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Excessive Heat in WESTERN DUTCHESS, NEW YORK
From 21-JUL-11 11:00:00 to 21-JUL-11 19:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

Excessive Heat in EASTERN DUTCHESS, NEW YORK
From 21-JUL-11 11:00:00 to 21-JUL-11 19:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Heat in MONTGOMERY, NEW YORK
From 21-JUL-11 11:00:00 to 21-JUL-11 19:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Heat in SOUTHERN FULTON, NEW YORK
From 21-JUL-11 11:00:00 to 21-JUL-11 19:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Heat in WESTERN COLUMBIA, NEW YORK
From 22-JUL-11 11:00:00 to 22-JUL-11 19:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Heat in EASTERN RENSSELAER, NEW YORK
From 21-JUL-11 11:00:00 to 21-JUL-11 19:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Heat in WESTERN ULSTER, NEW YORK
From 21-JUL-11 11:00:00 to 21-JUL-11 19:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Heat in NORTHERN FULTON, NEW YORK
From 21-JUL-11 11:00:00 to 21-JUL-11 19:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Heat in SOUTHERN HERKIMER, NEW YORK
From 21-JUL-11 11:00:00 to 21-JUL-11 19:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Heat in EASTERN COLUMBIA, NEW YORK
From 21-JUL-11 11:00:00 to 21-JUL-11 19:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Heat in NORTHERN WASHINGTON, NEW YORK
From 21-JUL-11 11:00:00 to 21-JUL-11 19:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Heat in WESTERN GREENE, NEW YORK
From 21-JUL-11 11:00:00 to 21-JUL-11 19:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Heat in WESTERN ALBANY, NEW YORK
From 21-JUL-11 11:00:00 to 21-JUL-11 19:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Heat in NORTHERN WARREN, NEW YORK
From 21-JUL-11 11:00:00 to 21-JUL-11 19:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Heat in WESTERN ULSTER, NEW YORK
From 22-JUL-11 11:00:00 to 22-JUL-11 19:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Heat in WESTERN DUTCHESS, NEW YORK
From 23-JUL-11 11:00:00 to 23-JUL-11 19:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS