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Showing posts from March, 2012

Temporary "Cool Down" Tomorrow

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A back door cold front (BDCF) is currently stalled out in Eastern Massachusetts creating a sharp temperature divide in New England.  A BDCF moves from the east to west instead of the typical west to east motion.  These are notoriously difficult to forecast; my professor of meteorology at Umass-Lowell, Dr. Frank Colby, gave a great presentation on the topic my freshman year.  He showed the differences between what the computer models were forecasting to happen and what actually happened.  That is why some of our weather has been "unexpected" this week.  Take last night...severe thunderstorms ripped across Southern NH and Northern MA.  Click here to read storm reports.  Severe hail ( > 1 inch diameter) was reported for the first time in the month of March since at least 1950, when record keeping began (h/t to Climate Data Center).  Some asked me if that was really lightning that was occurring last night when there were clear skies.  The answer is yes and that is an indicati…

Warm Weather on the Way

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The unseasonably warm weather will continue into middle to late March.  After approaching 70 on Thursday we cooled down yesterday and today.  I was expecting a quick burst of snow yesterday but I did not expect 3-6 inches north of Boston.  Here you can see the totals from last nights snow event.  That is behind us now as the energy is moving offshore of Cape Cod.  High pressure will build into the region and the warming trend will begin.  We have to get through today first as temperatures will only reach 40 or so.  Temperatures tonight will drop into the upper 20's before climbing into the upper 50's tomorrow.  The south coast will be held to the upper 40's due to  a southerly wind off the water.

The energy in Arizona and New Mexico has cut off from the general flow.  This will slowly move northeastward toward the Great Lakes.  Areas in the path of this low will see some heavy rainfall over the next several days.  This will help pull warm air into the Northeast.  High pr…

Wintry Precip Overnight, Heavy Rain Tomorrow

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A powerful storm system sweeping across the United States will impact New England overnight.  This is the same system responsible for producing 53 tornadoes (and counting) across the Ohio Valley and the Deep South.  The storm will be weaker but there will still be some impacts around the region.  First off, a Winter Weather Advisory has been issued by the National Weather Service in the areas shaded below.  Image courtesy of NOAA WWA txt here
Areas south of the Mass Pike will see very little snow and mainly a mixture of rain and sleet.  A warm front is surging north which will turn all precip over to rain by 3 am in the lower elevations.  Higher elevations will also turn over by 6 am.  The roads will be slick overnight so be careful on your way home.   Saturday will be warm, with highs near 50.  There will be a chance of a thunderstorm with this system as it moves through.  There will be no severe weather or tornadoes, but it will not be surprising to hear a few rumbles of thunder.  …