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REGIONAL FORECAST Extreme Mother's Day Weekend: Bomb Cyclone to Usher in All-Time May Record Cold, Northeast Snow By weather.com meteorologists
8:00pm / May 9,2020
weather.com
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At a Glance* An extreme weather pattern is in place for Mother's Day weekend.
* Some all-time May record lows have been set in the Northeast and Midwest.
* A frost is possible as far south as parts of the Carolinas and Southeast this weekend.
* Parts of the Northeast have picked up over 10 inches of snow.
* Rare May lake-effect snow is also falling in some Great Lakes snowbelts.
* This system has rapidly intensified as it exits the United States. _________________________________________________________________________________________________________
An extreme weather pattern is in place this Mother's Day weekend that shattered dozens of temperature records, wrung out strange May snow in the interior Northeast and set at least one May pressure record.
Happening NowSome rare May lake-effect snowbands and snow squalls were spreading across the Great Lakes and interior Northeast. Overpasses were already snow covered in parts of western Pennsylvania, according to live cams.
Graupel has mixed in across parts of the I-95 corridor.
TWITTER MESSAGEMJVentrice
@MJVentrice
Looks like dip N dots
TWITTER IMAGE LINK6:18 PM - May 9, 2020
https://pbs.twimg.com/media/EXm92y1X0AEaZMU?format=jpg&name=900x900Several trees and power lines have been damaged by gusty winds in southeastern New England already. A tree and powerline came down on two cars in Providence, Rhode Island, Saturday afternoon. Cars were also damaged by falling trees in Plymouth and Norfolk, Massachusetts.
Wind gusts have already been as high as 55 mph.
Parts of Upstate New York, Vermont, New Hampshire and Maine have already picked up 3-6 inches of snow, with up to 14 inches in eastern Maine.
One location near the Vermont - New York border northeast of Albany at an elevation of 1,300 feet reported one foot of new snow Saturday morning.
TWITTER MESSAGEJeff Richards
@JeffTwinsfather
@NWSAlbany @WashCoNYDPS911 #snow has stopped, 8" total on the snow boards. Which month is this, MAZY is what I'll name it!!!! Harford NY, 760' elevation
TWITTER IMAGE LINK8:25 AM - May 9, 2020
https://pbs.twimg.com/media/EXk2GngXkAIy4Gd?format=jpg&name=smallLight snow accumulations were also reported in parts of western and central Massachusetts and the Litchfield Hills of northern Connecticut.
TWITTER MESSAGEChristine Peterson
@ChrisPetersonTG
Ohhhhhh. They were serious about snow on May 9, 2020 😳 @NWSBoston these are from #Barre at 1070 Feet.
TWITTER IMAGE LINK7:40 AM - May 9, 2020
https://twitter.com/ChrisPetersonTG/status/1259085831207358464/photo/1Just after 1 a.m. Saturday, New York City's precipitation ended as less than an hour's worth of wet snow, tying the city's record latest spring snow. A trace of snow and a new record low temperature for the date will go into the record books.
Boston's temperature only rose to 44 degrees, Saturday afternoon, setting a new coolest maximum temperature record for the date.
The system set low pressure records in Maine. Eastpoint, Maine dropped to 982.0 mb Saturday afternoon, eclipsing the previous record low pressure for the month of May of 982.4 mb.
More records and superlatives from this extreme event can be toward toward the end of the article.
Forecast:
Record ColdThe strong cold front sweeping across the Midwest and East will make it feel more like late March than early May. High temperatures will be 10 to 25 degrees below average Mother's Day weekend.
Numerous daily record cold high temperatures are possible in the Midwest, South and East the next few days.
Low temperatures will be downright cold for Mother's Day weekend, even in parts of the South.
Thirties will plunge into parts of the Carolinas and Tennessee Valley, including Nashville, Tennessee, where the average low this time of year is in the mid-50s.
Early-morning temperatures in the 20s are expected in the Great Lakes, Ohio Valley and parts of the interior Northeast.
This late-season cold air might harm any sensitive spring vegetation where a frost or freeze occurs.
The National Weather Service has issued freeze warnings and frost advisories for much of the Appalachians, interior mid-Atlantic and portions of the Northeast. Freeze warnings and frost advisories have also been issued in the Plains.
These are locations where spring plant growth could be killed off, especially in the areas in pink on the map below. Move plants in side and cover gardens if possible.
This cold will threaten scores of daily record lows this weekend in the Midwest, South and East.
As mentioned earlier, some all-time May record lows could be in jeopardy.
If that isn't enough, a reinforcing blast of cold air will drop from the Plains and Midwest this weekend into the East and South, with more record lows expected at least through Tuesday, if not lingering into Wednesday morning.
Forecast:
Snow and WindParts of northern Maine may pick up another few inches of snow through Sunday morning, before precipitation with the low pulls away. Lighter snow is possible elsewhere throughout the Northeast in snowbands.
Strong winds combined with the weight of wet snow, could trigger power outages and lead to some tree damage, particularly in northern New England. Some graupel may continue to mix in at times across northern New England.
Gusts up to 50 mph are possible in parts of the Northeast. The wind combined with below-average temperatures will make it feel even colder.
A separate weather system sweeping through the Northern Plains and Great Lakes this weekend should also lay down a narrow stripe of accumulating wet snow from North Dakota and northern Minnesota into northern Wisconsin and northern Michigan that could lead to some slushy accumulation on roads, particularly at night.
A few strong thunderstorms are also possible on the southern side of this clipper system, generally in parts of Indiana and Ohio.
Notables and Records So FarPittsburgh reported a trace of snow both Friday and Saturday, the first consecutive May days of snow, there, in 97 years.
And, as noted by NWS-Charleston, West Virginia, meteorologist Nick Webb, Snowshoe, West Virginia, set their record 24-hour May snowfall in 45 years of records. Elkins, West Virginia, also set a new 24-hour May snow record, picking up 1.5 inches of snow Friday.
This forecast prompted the National Weather Service in Caribou, Maine, to issue its first May winter storm warning in at least 15 years. According to the NWS, this event could be the heaviest May calendar-day snow on record in both Caribou (current record: 5.8 inches in 1967) and Bangor (current record: 3.8 inches in 1963).
Meanwhile, the cold has already smashed records in the East.
All-time May record lows were set Saturday in Binghamton, New York (24 degrees); Fort Wayne, Indiana (23 degrees); Indianapolis (27 degrees); New York's LaGuardia Airport, and Jackson, Kentucky (30 degrees). State College, Pennsylvania, New York's JFK Airport and London, Kentucky tied their all-time May records, Saturday.
According to the National Weather Service, prior to Saturday, the latest spring date Fort Wayne, Indiana, plunged to 23 degrees was Apr. 20, 1897 and 1904, almost three weeks earlier in the spring.
Nashville, Tennessee, also plunged to their coldest low so late in spring Saturday morning, beating their previous record latest 35-degree low by three days.
Washington's Reagan National Airport dipped to its coldest May low since 1966. Peoria, Illinois, had its latest spring freeze since 1971.
Van Wert, Ohio, plunged to 18 degrees Saturday morning, the first time they've dropped into the teens in May in 127 years of records.
Wind chills in were as cold as the teens, even upper single digits, in parts of the East Saturday.
Extreme PatternThis weather pattern would grab the attention of meteorologists in the middle of winter, much less the second weekend of May.
Basically, the jet stream will resemble a white-knuckle ride on a roller coaster.
Blocking high pressure near Greenland and another "omega block" of high pressure bulging northward from the West Coast of the U.S. to the Arctic Ocean northeast of Alaska will work together to force the jet stream to take a sharp southward plunge over the Great Lakes and Northeast.
There are several parts of this pattern that could be record-setting.For starters, the cold surface air mass pushing toward the United States from northern Canada is exceptionally strong. The town of Mould Bay in Canada's Northwest Territories set an all-time barometric high pressure record for May with a reading of 1049.2 millibars on Friday, according to David Roth, a meteorologist at NOAA's Weather Prediction Center.
The Weather Channel meteorologist Jim Cantore noted temperatures in the mid-levels of the atmosphere – for meteorologists, the 500-millibar level – could reach minus 40 degrees (Celsius and Fahrenheit) over the Great Lakes this weekend, a first anywhere in the U.S. in May, according to data from NOAA's Storm Prediction Center dating to the mid-20th century.
Secondly, intensifying low pressure in the Northeast is now a bomb cyclone – a drop in the storm's central pressure by at least 24 millibars in 24 hours or less – in the Gulf of Maine. The storm is already strong enough to set all-time May pressure records along the Maine coast, according to data compiled by Roth.
Eastpoint, Maine dropped to 982.0 mb Saturday afternoon, eclipsing the previous record low pressure for the month of May of 982.4 mb.
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The Weather Company’s primary journalistic mission is to report on breaking weather news,
the environment and the importance of science to our lives.
This story does not necessarily represent the position of our parent company, IBM.________________________________________________________________________________________________________
