Tuesday, April 24, 2012

Here it comes...and there it went

NOAA animation of the April 2012 Spring Storm in the Northeast

10:45 PM EDT 4/24/12 (Forecaster Mike) - The Out of Season Nor'easter is winding down now, as the last bits of rain and snow have finally dissipated in the Northeastern states. You may have been wondering how such a snowstorm could happen this time of year. The answer lies in the same thing that allowed for the October 2011 snowstorm: Dynamic Cooling. A brief explanation of this phenomenon was included in the previous lead story from yesterday. For some locations in Pennsylvania and New York, the apparent hype was warranted. Selected snowfall acccumulations through Monday night:
  • 23 inches - Laurel Summit, PA (Somerset County, southern PA) 
  • 9 inches - Acme, PA (Westmoreland County, southwest PA)
  • 8 inches - Phillipsburg, PA (Centre County, central PA
FEATURED LOCAL ZONE. Snow showers are continuing on and off for our Foot's Forecast | Central Pennsylvania zone, as posted in their Facebook page.

REMEMBERING LA PLATA Ten years ago this week, on a warm April afternoon the lives of an entire Maryland town were changed forever. It was the April 28, 2002 LaPlata tornado, and the memories for some are still fresh. Our Affiliate in Southern Maryland, the Maryland Weather Center (MWC)  - lead by Forecaster Josh Owens, in partnership with our Capital Region Team of the Washington DC metro area is commemorating the lessons learned and the recovery from this most unusual of tornadoes to ever strike Maryland. Please visit the MWC website for videos and special reports coming up this week.

WHAT'S COMING NEXT? Behind this storm, we have a trough digging into the eastern half of the country, bringing below average temperatures to many people in that region.  This will change the general storm track over the next week compared to what we have been seeing. Storms will start to dive very quickly out of the northern Rockies, then slide along the Ohio River Valley and then out.

THE PATTERN AHEAD We  expect multiple storms to follow this same track this week into next, which will make for some tiringly repetitive rain over the next week or so. The good news is that this storm track makes it very difficult to wind up any severe weather! While scattered showers and thunderstorms are possible across the east, it will be very difficult to get a major severe weather outbreak with a deep eastern trough. 

TOASTY IN THE MIDDLE Right in the middle of all of this is our Kansas City Metro zone. The jet stream is taking a dive right over Missouri, so we will end up with a very unique Tuesday with highs in the 80s, while we could be seeing highs 10ยบ cooler just across the state in St. Louis. Temperatures will continue dropping as you head east, to the February or March-like weather that will be common around the eastern Great Lakes. Stay tuned for more and have a wonderful Tuesday! 

WEST IS AGAIN BEST If there's a trough in the east, there is quite often a ridge in the west. Tuesday will be another warm day across much of the west, but we will again see a large area in which scattered showers and thunderstorms are possible. We don't have any organized storm systems moving into the west at the time, but that does not eliminate the chance for some pop-up showers and thunderstorms. 

Enjoy this brief respite from the recent stormy pattern, and have a great Tuesday! 

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