Monsoons Return to the Southwest U.S.; Potential Atlantic Tropical System Interaction

In Arizona and New Mexico, heavy to excessive rainfall from monsoon thunderstorms may bring isolated flash and urban flooding Thursday into Sunday. The close proximity of Tropical Storm Humberto and a tropical wave (AL94) could lead to interaction between them, and details of their long-range track and intensity forecasts, and any potential impacts, are more uncertain than usual. Read More >

Overview

Frigid Morning Temperatures Saturday 17 Jan 2009 The coldest morning in at least a decade occurred across the region Saturday (the 17th) morning. A record low of 13 below zero F was set at Williamsport, PA, breaking the record set in 1982 of 12 below. See the map below for other reported low/minimum temperatures that morning. Low temperatures varied greatly from urban areas to rural spots, which is not unusual on clear, calm mornings any time of year. They also varied from areas close to bodies of relatively warmer water to open land, and also from hill tops to valleys. Again, this variation was not unusual, but the near-record cold was.