Tuesday, March 21, 2017

'Marchuary' Continues in Northeast as New Cold Blast Arrives Wednesday

Brian Donegan
Published: March 21,2017

"Marchuary" continues in the Northeast this week despite the calendar now saying spring, as a new blast of cold air arrives Wednesday behind an arctic cold front. For many cities, the average temperature in March so far is lower than what was seen in January and February – hence the term, "Marchuary."
(MORE: 5 Things to Know About Arctic Cold Fronts)
A southward dip in the jet stream, or upper-level trough of low pressure, will take hold of the Northeast and Great Lakes region, allowing arctic air to spill south of the Canadian border.

Five-Day Forecast
High temperatures will be 10 to 20 degrees below average, while lows will be up to 25 degrees colder than average from the Northeast into the Great Lakes.
Portions of the interior Northeast and northern New England will be stuck in the 20s for highs Wednesday and Thursday, and low temperatures will plunge into the single digits and teens. Wind chill values will be even colder as a stiff north to northwest breeze develops.
(MORE: Pattern Change This Week)

Forecast Morning Lows
Thursday morning will likely feature the coldest temperatures, and a few record lows may be challenged. This includes (current record in parentheses): Hartford, Connecticut (9 degrees), Binghamton, New York (9 degrees), Scranton, Pennsylvania (9 degrees), and Charleston, West Virginia (19 degrees).
These cold temperatures will also allow the chance for some wintry precipitation at times. This includes a minor lake-effect snow threat in parts of western and central New York Wednesday morning, where most areas still have a deep snowpack from Winter Storm Stella. Accumulations are expected to be less than two inches in most spots, however.
(MAPS: 7-Day Rain/Snow Forecast)
The good news is this shot of cold air will be short-lived, and temperatures will return to average or above average Friday into Saturday. Parts of New England and New York may see cold air return Sunday, and there is the potential for some wintry weather, as well.

'Marchuary' – Colder Than January, February

February was record or near-record warm in a large swath of the southern and eastern U.S., so March has been quite a change in the Great Lakes and Northeast, especially.
Many Northeast cities are experiencing a colder average temperature this month through March 20 than the average temperatures they recorded in January and February.
(MORE: The Two Warmest Februaries on Earth Since 1880 Have Occurred the Past Two Years)

Average monthly temperatures and departures in January, February and March (through March 20).
Buffalo is coming off its warmest February on record with an average temperature of 34.8 degrees, which was 8.5 degrees above average. March is currently running 3.1 degrees below average with an average temperature of only 28.9 degrees.
On the other end of the Empire State, New York City also saw its warmest February on record with an average temperature of 41.6 degrees, which was 6.3 degrees above average. The average temperature in March so far is only 36.6 degrees, or 4.1 degrees below average.
In Pittsburgh, it was the third-warmest February on record with an average temperature of 40.6 degrees, a whopping 9.5 degrees above average. So far, March is running 3.6 degrees below average with an average temperature of 34 degrees, colder than this past January's average of 34.6 degrees, which was 6.2 degrees warmer than average.
(MORE: Late-Spring Outlook)

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