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Lead Forecaster Josh Adams
The Storm Prediction Center has labeled much of the state under a slight or enhanced risk of severe thunderstorms for Monday (5/1). An organized line of storms ahead of an approaching cold front will move across the state from west to east Monday Afternoon and Evening. A few isolated cells ahead of the main line have the best potential to produce a tornado in Central PA. However, the highlight of the day will be a widely impacting line of severe thunderstorms. The greatest threat with this line will be damaging winds of 60-70MPH. Here is a timeline of the anticipated…MORE...
A tornado was reported by several sources including a 911 Call Center and other emergency management employees in Northern Warren County Thursday Evening. The supercell thunderstorm had just gone tornado warned at the time of the reports. The video below displays a funnel cloud with a potential touchdown. Great video from Miranda Rose Miller in Warren County. This was reportedly taken from Piccadilly Hill Road, showing an obvious funnel. #pawx pic.twitter.com/0lnLsC8xIN — Geoff Cornish (@StormOfCorn) April 21, 2017 Be sure to share the action using the icons below!
We are now just several hours away from a crippling blizzard that will bury places with a widespread 1 to even 2 feet of snow. We cannot stress enough that you do not want to be driving in this storm at any point Tomorrow. Here are the latest watches and warnings from the NWS. Blizzard Warnings are up across much of Eastern PA. The snow will start 10 PM to 1 AM south to north. Below is the HRRR valid 12 AM tonight showing the first snow bands entering southern pa: The snow quickly begins to intensify and by 3…MORE...
Over the last 24 hours since our first call, guidance has trended more aggressive in terms of snow amounts for much of state Monday Night into Tuesday. The closer we get to impact, the more confidence we are having that this will go down as one of the largest March snowstorms in recorded history. We will take a look at the NAM model to breakdown the timing. Snow will begin to overspread the area from south to north between 9 PM Monday through midnight Tuesday, below is the NAM valid 11 PM Monday night: By 2 AM Tuesday Morning much…MORE...
We hope everyone is enjoying this beautiful Thursday afternoon because the weather is about to change…fast. From temperatures in the 50s and 60s, to accumulating snow within a 12 hour period is pretty impressive and that is exactly what we are anticipating going into the overnight hours. Because surface temperatures are so warm, especially for our southern counties, precipitation may start off as some rain showers, before transitioning to snow. Below is the GFS showing a push of rain and snow into the area by 10 PM tonight: After midnight, most areas will be experiencing some steady wet snow, with…MORE...
A strong cold front moving through Thursday will be followed by a fast moving wave of snow Friday Morning. Snow will move into Southwestern and West Central PA by around 12 AM Friday. Here is the NAM Model Radar Forecast for 1 AM Friday. At this point, snow will be accumulating mainly on grassy surfaces. However as the night goes on and ground surfaces continue to cool, slushy snow will likely begin to accumulate on the roads mainly in areas receiving moderate snow rates. Below is the NAM Model Radar Forecast for 7 AM Friday. Snow is expected to end…MORE...
Severe thunderstorms will pop-up Wednesday Afternoon ahead of an organized line anticipated to move through by the late afternoon and evening depending on location. The NWS Storm Prediction Center has now expanded the Slight Risk to cover the entire state. There is the possibility of an Enhanced Risk being warranted across Southern PA. We expect storms to fire Wednesday Afternoon, some of which will likely turn severe. There is the possibility of a couple cells turning tornadic mainly in Southern and Central PA. By late Wednesday Afternoon we expect an organized line of strong to severe thunderstorms to develop just…MORE...
Severe thunderstorms tore through the eastern half of the state Saturday, delivering widespread wind damage along with golf ball sized hail and even two tornadoes. An EF-2 tornado outside of Scranton in the town of Pittston packed winds of 120 MPH and was observed to be nearly a third-mile wide. The tornado was the strongest in Pennsylvania history for the month of February. A similar setup will be in place Wednesday, with a low pressure system traveling to our north. Along with very high CAPE values for this time of the year, there will be much more lift Wednesday compared…MORE...
A tornado-warned supercell thunderstorm near Scranton, PA in the area of Pittston produced what has been ruled the strongest tornado in Pennsylvania history for the month of February with winds of 120 MPH. Here is the video, check it out! This #tornado occurred this afternoon near Dupont, #Pennsylvania. Video: Jolene Ann Airwyke-Rose pic.twitter.com/c7xyV55Vdz — Zach Sharpe (@StormChaserZach) February 25, 2017 Be sure to share this historic event below using the icons! Stay safe!
On February 24th, 2016, multiple tornadoes touched down from the New York Border to the Maryland Border. This year, parts of the state will face the threat of severe thunderstorms just one day later. While we don’t expect tornadoes this time around due to far different dynamics, strong to severe storms containing mainly damaging winds will be possible Saturday. A low pressure system moving through the Central Plains and Upper Midwest will cut to our west Thursday and Friday, pushing temperatures in Central and Southern PA over the 70 degree mark both days. By Saturday, warm air will still be…MORE...
About a week ago we made a post regarding a chilly and potentially snowy February in-store for the Keystone State. Now, being only seven days from the first day of February, our confidence has only grown that February will bring below average temperatures and above average snowfall to PA. Long range models continue to indicate persistent troughing from the Northern Plains to the Mid-Atlantic for atleast the first half of February. Below is the GFS Ensemble Mean. To make things simple, blue means below normal temperatures, orange is above. We also mentioned the MJO, which can influence our pattern. It…MORE...
A strong cold front will move through the area Thursday, reactivating the lake effect snow machine. Snow will begin across Western PA Thursday Night, with the heaviest snow likely Friday. Pittsburgh will see about 2-4″ of snow, with its northern suburbs picking up 4-6″. The Laurel Highlands, especially around Somerset and Johnstown, will benefit from upslope activity, resulting in persistent snowfall. Around 6-8″ of snow is likely across these areas. Here is our complete snowfall forecast map. SNOWFALL EXPECTED THURSDAY – SATURDAY Area A – Snowfall accumulation of 8-12″ expected. Area B – Snowfall accumulation of 6-8″ expected. Area C…MORE...
To begin with, this article will be more technical than normal. This winter started off with temperatures near average in December. Though, you were probably wondering why it never snowed when it was cold and why it always rained when it was warm. We often turn to the NAO and AO when we think of winter. However, neither of those factors really played a big role in December. The teleconnection that dominated the pattern was the PNA. If you don’t know what the PNA is, it’s no big deal. All you need to know is when the PNA is negative,…MORE...
Today, a 127 year old record was broken across parts of the state. In addition, flash flood and severe thunderstorm warnings shaded the map in Western Pennsylvania north of Pittsburgh as a strong line of storms rolled through. This is what mid-January has come to here in PA. Will it last? Of course not! Just 36 hours from now snow will be falling in some of the same regions that reached the mid 60s today. The same system that will be giving us snow and ice Saturday will be crippling some areas of the Central Plains with up to an…MORE...
Lake effect snow is likely Friday across Western PA. Area A – Snow accumulation of 8-12″+. Area B – Snow accumulation of 4-8″. Area C – Snow accumulation of 2-4″. Area D – Snow accumulation of 1-2″. Area E – Snow accumulation of less than 1″. Like us on facebook at Pennsylvania Weather Action and remember to share the forecast with your family and friends below!
