Weather Outlook for May 13, 2014
Posted: May 13, 2014
Rainfall deficits are beginning to mount across Pennsylvania as streams of moisture diverge as they approach the state. Such was the case last weekend. The largest departures from normal are in the central counties where precipitation is now running more than one month (>4 inches) below average for the year to date amounts. Good news is that some of this will be erased by a slow-moving cold front during the next few days. An onshore wind will keep low clouds across the eastern half of the state on Wednesday as a few thundershowers erupt in the warm, sticky air in the western counties. As a cold front edges eastward on Thursday, humid air and partial sunshine will return to the eastern half as showers and thunderstorms accompany the front in the western sections. Several narrow bands (25-50 miles wide) of very heavy rain (oriented north-south) are expected as the front moves through late Thursday and Friday. A few stripes in the central counties could receive more than 3 inches. Steady rain will exit the Commonwealth by Saturday morning and will be followed by notably cooler, somewhat drier conditions. Below average temperatures and abundant afternoon clouds should be the rule from Sunday into Tuesday. A smattering of showers are possible each afternoon with Sunday being the most likely day for widespread light showers. As skies clear, it may be cool enough for a few pockets of frost in the northeast sections on Tuesday. Several dry days with moderating temperatures are expected during the later half of next week.