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Weather Forecast Discussion

Areas of drizzle and fog overnight into Monday as temperatures remain mild

Rain overnight Monday into Tuesday, mild & breezy

TONIGHT: Mostly cloudy with spotty drizzle. Areas of fog late. Some patchy freezing drizzle possible across the Poconos. Low: 36

 

MONDAY: Areas of patchy morning drizzle and fog; otherwise, rather cloudy. High: 49

 

MONDAY NIGHT: Mostly cloudy with periods of rain arriving late. Temperatures nearly steady or slowly rising. Low: 42

 

 ***FLOOD WATCH FOR LANCASTER COUNTY UNTIL 1 PM MONDAY FOR ICE JAM FLOODING ALONG THE SUSQUEHANNA RIVER***

 

Sunday continued the weekend thaw with high temperatures once again topping out well above normal for this time of the year. Typical highs should be in the low to mid 30s, but many of us topped out in the upper 40s to low 50s, even with a fair amount of cloud cover. We did see the sun break through those clouds on occasion. Snow has melted very fast and for most folks, the snowpack is all but completely gone.

 

For the overnight, high pressure continues to be centered well to our south off the Southeast U.S. coast. The clockwise flow of air around this feature is bringing us a south wind flow which continues to usher in mild and moist air. At the same time, a warm front to our west will continue pushing northeastward. This all spells lowering and thickening clouds for the overnight as low-level moisture increases across the region. With the warm front moving in, it’s very well possible areas of drizzle will develop. Expect milder nighttime lows tonight with many only expected to dip into the mid 30s. It’s possible, some very isolated areas across the Poconos could be just cold enough, or at least have ground temperatures just cold enough, that some freezing drizzle develops. Overall though, this should not be a big deal. Some locally dense fog will also be possible overnight.

 

Areas of drizzle and fog will continue to be a possibility as we work through Monday morning. The aforementioned warm front will continue lifting to our north throughout the day allowing mild and moist air to continue to build across the region. As the warm front pushes further away to our north Monday afternoon, low-level moisture may decrease a little moving away to our north. This may allow for some breaks in the clouds but we can still anticipate a mostly cloudy day overall. Still, the afternoon may actually be free of any rain or drizzle and with a warm sector pushing into the region, high temperatures once again may be able to climb back to around 50 for several locations. Certainly the further south you go from I-78, the better your chances will be to hit 50 if not go a few degrees above 50.

 

By Monday night, a potent area of low pressure will be tracking into the Great Lakes from the Plains States. As it does so, it will drag a cold front into our direction. Out ahead of this front, a southerly wind flow will just keep pumping in mild and moist air. Initially Monday night, we may be dry and just cloudy; however, after midnight, as the cold front gets closer, steady rain is likely with areas of fog. Temperatures Monday night into early Tuesday morning will likely not drop much from the highs during the day Monday. Everyone should stay above 40 for the low. In fact, the numbers may very well stay steady or slowly rise.

 

The aforementioned cold front will track through Tuesday bringing steady rain for the morning into the early afternoon. Locally heavy downpours will be possible. Quite the surge of mild air is anticipated to push into our region right out ahead of the cold front, so we can expect high temperatures Tuesday to climb several degrees into the 50s. Once we get behind the front, rain should end from west to east during the afternoon with perhaps a little bit of clearing sky as winds change from the southeast to the west ushering in drier air. This west wind could also become a bit gusty with perhaps some gusts over 20 miles-per-hour. Rainfall totals look to be on the order of a half inch to one inch area-wide with perhaps some locally higher amounts.

 

High pressure will slowly build back in from our west for the middle of the week leading to fair skies. We can expect breezy conditions Wednesday as there will be a somewhat tight pressure gradient between the high and the exiting storm system off the coast. We can also expect cooler conditions as a northwest wind flow combined with a dip in the jet stream will usher back in a more seasonable air mass. High temperatures Wednesday will likely be back in the upper 30s, and as we go into Thursday, even colder air pushes in on the northwest wind flow making for highs only in the low to mid 30s. Winds should be lighter Thursday as high pressure starts to build right atop the region. High pressure will then slowly make its way off the coast by the end of the day Friday allowing our winds to start to turn back out of the south. This means warmer air will start to make a comeback. Expect mostly sunny skies Friday with high temperatures back to around 40.

 

High pressure will anchor itself off the coast for next weekend allowing a persistent southerly wind flow to once again pump in mild air. Look for dry conditions next Saturday with a mix of sun and clouds and high temperatures well into the 40s. Next Sunday, a cold front once again works in from our west and this will bring us a chance for rain as high temperatures may very well crack the 50 degree mark. Have a great and safe week ahead folks!


10 Day Forecast

  • Sunday

    50° / 36°
    Mostly Cloudy; Mild 0%
  • Monday

    49° / 42°
    AM Drizzle/Fog; Rather Cloudy 60%
  • Tuesday

    54° / 32°
    Periods of Rain Early; Breezy 90%
  • Wednesday

    39° / 23°
    Sun, Clouds; Breezy and Cooler 0%
  • Thursday

    34° / 18°
    Chilly with Sun and Clouds 0%
  • Friday

    40° / 26°
    Mostly Sunny; Milder 0%
  • Saturday

    46° / 35°
    Partly Sunny; Even Warmer 0%
  • Sunday

    52° / 41°
    Mostly Cloudy; Rain Possible 40%
  • Monday

    48° / 25°
    Mostly Cloudy; Chance of Rain 30%
  • Tuesday

    36° / 20°
    Mostly Sunny; Brisk and Colder 0%

Historical Averages

High Low
Current 50°F 36°F
Average 35°F 19°F
Record 63°F January 21, 1959 -15°F January 21, 1994

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