April 28, 2011 Severe Weather Coverage

2:38 radar update:



2:28: PHI issues Severe Thunderstorm Warning for Burlington, Monmouth, Ocean [NJ] till 3:30 PM EDT

2:03 Update: PHI issues Severe Thunderstorm Warning for Atlantic, Burlington, Camden, Gloucester [NJ] till 3:00 PM EDT

1:53 Radar Map:



1:28 p.m. UPDATE: Thunderstorms weakened a bit about an hour ago but are starting to hit the juicy air over Delaware and South Jersey. Due to the initial weakening trend, they have become less linear and more cellular/clustered. This likely enhances the tornadic threat and hail threat, but it will continue the downdraft potential. The latest radar trends showing 50-60 DBZ increases. Clearly, areas from the Delaware River and points east will be impacted for the next two to three hours.





12:29 p.m.: Look at the two mesoscale analysis maps I have posted just recently updated.





12:20 p.m. Update: Several dangerous thunderstorms continue to ride along the slow moving front with numerous severe t-storm warnings from Northeastern NJ down through areas just west of Philadelphia...and also NE MD and N DE.

11:03 a.m.: Tornado Warning for Northampton, Hunterdon, Warren, and Bucks Counties!

10:32 a.m.: Tornado Warning number three continues for Lancaster County---very strong rotation noted on doppler radar at times!

9:53 AM Update:  A Severe Thunderstorm Watch is out for the region until 4 PM (see below).   Lancaster County area has been in and out of tornado warnings for the last hour or two while Berks, Lehigh, and Lancaster area remains under severe t-storm warnings.   Sunshine is out in parts of NJ and DE...could provide more fuel for storms.

Isolated tornadoes, despite this only being a severe t-storm watch, remain very possible....hence the warnings we have already had today.

Update, 9:40 AM:   Wanted to point out the main action that will impact our region will be coming out of Maryland over the next hour or two as most of the storms in Lancaster County at present will slide to the north of the city.   The line itself is moving east slowly while the individual thunderstorms on the line are moving northeast, which means that storms farther south will be the ones that ultimately impact us as the line gradually shifts east throughout the rest of the morning.   One particular part of the line in Maryland has had a bit of a history of damaging winds and showing signs of tornadic rotation within it.  That cell is circled on the radar map above.  This cell will be working into Northern Maryland, then into Lancaster and Chester Counties over the next hour or two, perhaps into far upper Montgomery County if it can maintain itself.  At minimum, damaging winds may be the result of that line of storms later on.

9:19 a.m.: Severe T-Storm Warning continues for Lehigh, Berks, and Lancaster Counties until 10:00 a.m.

9:04 a.m. Update: Tornado Warning has been allowed to expire for Lancaster County. A severe thunderstorm warning is in effect for Lancaster and Berks Counties.




9:00 a.m.:

A tornado warning was recently issued until 9:15 a.m. for Lancaster County. Get inside an interior closet or basement if you live near Strasburg or New Holland.