Tuesday, May 10, 2016

Daily Weather Briefing May 10, 2016

High pressure is dominating the weather in the northeast.  Gone are the brisk winds from Monday and the cold of this morning.  This afternoon will be bright and mild.  Here is the national surface chart
WPC Surface Analysis 11 AM
Local temperatures in the Blackstone Valley as of 1230 PM were in the low to mid 60's.  These will rise this afternoon and approach 70.
NWS Enhanced Data Display temps, wind direction 1230 PM
Temperatures are a bit warmer in the Merrimack Valley and similar everywhere else with the exception of the coast/Cape which are still in the 50's.  Tonight is not as cold as last night so I am not anticipating any Frost/Freeze headlines.   In general temperatures will hover around 40.  Wednesday and Thursday are near carbon copies of one another with temperatures in the low to mid 70's and mostly sunny skies.

National Outlook
The severe weather threat moves east and south today.  The SPC severe weather outlook
SPC Day 1 Severe Weather Outlook 
Yesterday some significant tornadoes tore through the Plains and Mississippi River Valley.  Here is the severe weather report chart combined with the Storm Prediction Center (SPC) outlook for yesterday
SPC Severe Reports 5-9-16 with 9 AM severe outlook
Unfortunately 2 people were killed and a lot of homes were damaged and destroyed.  National Weather Service (NWS) teams are still surveying the damage but I would imagine some of these storms were EF-3/EF-4.  Although it is a killer this photo is a beauty.
KFOR NBC Oklahoma Digital Team blog 
On This Day in Weather History
Up to 20" of snow fell in Southern New England beginning on May 9 and ending early morning May 10 in 1977.   Up to 13" fell in Worcester and for the only time in recorded history (1870's in Boston) a snow depth was recorded in May at Logan Airport.  The NWS put together this nice graphic from the storm.
NWS Boston May 9-10, 1977 recap
The snow did not stick around long.  The mid May sun is similar to the early August sun.  This is an event more extreme than the Halloween snow of 2011.  I'm sure quite a few of you remember this event well.  You know that upper air pattern is not all that dissimilar from last week's pattern.  I guess just dissimilar enough!
NOAA NCEP Reanalysis May 9, 1977 8 PM
-Zack Green

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