Heavy Rainfall in the Southwest and Southeast This Weekend; Monitoring Tropical Cyclone Formation Which Could Impact the Southeast U.S.

Heavy rainfall from monsoon thunderstorms may bring isolated flash and urban flooding to the Desert Southwest. A near-stationary front will bring numerous showers and thunderstorms to much of the Mid-Atlantic and Southeast. Tropical wave (AL94) is likely to become a depression. Significant uncertainty remains in the track and intensity, but chances for impacts to the Southeast are increasing. Read More >

Overview

Another La Niña Winter's Storm arrived in Central Pennsylvania Tuesday, and lasted into Wednesday morning (27th). It brought heavy snow to the far Northern Tier of the State, but a messy mix of Sleet and Snow to areas from I-80 to Route 6, and mostly Rain and Freezing Rain to the rest of the region. While the precipitation started as snow over most of Central Pennsylvania early on Tuesday morning, making a messy morning rush hour commute, the temperatures warmed up very quickly aloft (See SkewT) and turned the precipitation to rain in the south and freezing rain in central areas rather early on Tuesday. The precipitation stayed Snow for all of the 24 to 30 Hours in the northlands.

Animation of radar pictures/mosaic from 6 AM to 1 PM Tuesday (26th)

Maps & Figures

Maps & Figures


IR Satellite Picture with 13z (8 AM EST) Observations	Coop 2-day Snowfall Total from 7:00 am Tues Feb 26th thru 7:00 am Thursday Feb 28th	12z Skew T Diagrams (Upper Air soundings) - note the above freezing air aloft (and at the surface at KLWX)