| | | Feeling More Like March Than May This Weekend
Published:
May 14 2016 07:15 AM EDT
By Brian Donegan
weather.com
<ul class="default twc-social-bar glomo-social-bar closed small" data-ng-class="{'closed': !toggleExpand, 'expanded': toggleExpand, 'five': providers.length === 5, 'small': providers.length
Freeze Could Bring in Record Lows
A cold front leaves the weekend chilly, even freezing for some.
<!---->
Weekend Freeze Warnings Issued
Top 5 Cities for Spring Allergies
May Temps Will be Above Average Across Much of Country
How Cold is Cold?
The Science Behind Wind Chill
Although we're only two weeks away from the Memorial Day Weekend, the unofficial start to summer, it will feel more like St. Patrick's Day Weekend across the Midwest and Northeast.
Setup and TimingA cold front slid through the Midwest Friday night with showers and thunderstorms. This weekend, the jet stream, or river of fast-moving air separating cold air from warm air, will dip southward and a cool, Canadian airmass will dominate through at least Monday.
{"uid":4,"hostPeerName":"https://weather.com","initialGeometry":"{\"windowCoords_t\":-8,\"windowCoords_r\":1944,\"windowCoords_b\":1064,\"windowCoords_l\":-8,\"frameCoords_t\":1152.969970703125,\"frameCoords_r\":1166.5,\"frameCoords_b\":1242.969970703125,\"frameCoords_l\":438.5,\"styleZIndex\":\"auto\",\"allowedExpansion_t\":0,\"allowedExpansion_r\":0,\"allowedExpansion_b\":0,\"allowedExpansion_l\":0,\"xInView\":0,\"yInView\":0}","permissions":"{\"expandByOverlay\":false,\"expandByPush\":false,\"readCookie\":false,\"writeCookie\":false}","metadata":"{\"shared\":{\"sf_ver\":\"1-0-2\",\"ck_on\":1,\"flash_ver\":\"21.0.0\"}}","reportCreativeGeometry":false}" width="728" height="90" title="3rd party ad content" id="google_ads_iframe_/7646/web_weather_us/weather/news_4" src="https://tpc.googlesyndication.com/safeframe/1-0-2/html/container.html#xpc=sf-gdn-exp-4&p=https%3A//weather.com" frameborder="0" marginwidth="0" marginheight="0" scrolling="no" style="border: 0px currentColor; vertical-align: bottom; border-image: none;" data-is-safeframe="true">[/iframe]
(MAP: Current Temperatures)
A southward dip in the jet stream will cause a cool, Canadian airmass to set up across the Midwest and Northeast this weekend.
High temperatures will range from 15 to 25 degrees below average from Minneapolis and Chicago over to Pittsburgh and Philadelphia.
This cool shot of air will cause highs to get stuck in the 40s and 50s over the Upper Midwest and Great Lakes Saturday, so residents of Minneapolis and Chicago will likely be looking for their light jackets. Parts of the U.P. of Michigan will even get stuck in the 30s Saturday afternoon.
The cold front will continue its trek eastward through the Northeast Saturday, bringing showers and thunderstorms to the I-95 corridor and into Upstate New York and New England late in the day.
Temperatures will be close to average to start the weekend, but by Sunday Washington D.C. up through Boston will be feeling the chill as the jet stream continues its southward dip. Highs will be stuck in the 50s to low 60s across the Northeast Sunday afternoon. While Washington D.C. and Philadelphia improve to the mid 60s by Monday, that is still 5 to 15 degrees below average for mid-May.
Forecast Highs This Weekend
Not only will high temperatures be below normal, but low temperatures will be too. Lows in the 20s and 30s will be common over the Great Lakes region as the heart of the cold air sets in Saturday night. In fact, portions of the northern Great Lakes could even see a little bit of snow both nights.
Lows in the Northeast won't be quite as chilly as the Great Lakes this weekend. Low temperatures in the 40s are expected across the Northeast on Sunday and Monday mornings, with a few 30s possible in interior locations.
Forecast Lows This Weekend
The highest elevations of Upstate New York and Northern New England also have the possibility of some snow Saturday night and, especially, Sunday night. Residents of the Catskills and Adirondacks in New York, the Green Mountains in Vermont, and the White Mountains in New Hampshire have the greatest potential to wake up with snow on the ground Monday morning.
RPM Model Snow Forecast
Accumulating snow possible Saturday and Sunday nights.
Average Last FreezeBelieve it or not, having near- or below-freezing temperatures in mid-May are not all that uncommon. Much of the Upper Midwest, Great Lakes, and New England typically don't see their last freeze until between April 30 and May 20, which appears to be on target this year.
(MAPS: Frost and Freeze Advisories)
Average dates of the last freeze across the United States.
Return to Spring TemperaturesBelow-average temperatures will be slow to exit next week across the Midwest and Northeast. The early part of the week will still feature cool temperatures, but the pattern appears to transition back toward spring by the middle of next week with highs warming to near-average levels.
(MAPS: 10-Day Forecast Highs/Lows)
Share on FacebookShare on Twitter
MORE ON WEATHER.COM: April 2016 Snow in the Northeast (PHOTOS)
0]" data-ng-click="slideshow.prev()" data-ng-if="!isTouch || isAndroid">
1 of 14
<a title="Next Image" class="wx-iconfont-global wx-icon-arrow-right-2 active" href="" data-ng-class="{true : 'active'}[slideshow.currentIndex
0]" data-ng-click="slideshow.prev();" data-ng-mouseenter="showLeftOpaque = true" data-ng-mouseleave="showLeftOpaque = false">
<div class="wx-wrapper wx-media img-xxxl" style="width: 100%; height: 463.85px; padding-top: 231.92px; display: none; visibility: hidden;" imagesrc="https://dsx.weather.com//util/image/w/cfnsn9awcaewzpj.jpg?v=ap&w=980&h=551&api=7db9fe61-7414-47b5-9871-e17d87b8b6a0" previous="" img-xxxl="https://dsx.weather.com//util/image/w/cfnsn9awcaewzpj.jpg?v=ap&w=980&h=551&api=7db9fe61-7414-47b5-9871-e17d87b8b6a0" img-xxl="https://dsx.weather.com//util/image/w/cfnsn9awcaewzpj.jpg?v=at&w=815&h=458&api=7db9fe61-7414-47b5-9871-e17d87b8b6a0" img-xl="https://dsx.weather.com//util/image/w/cfnsn9awcaewzpj.jpg?v=at&w=650&h=356&api=7db9fe61-7414-47b5-9871-e17d87b8b6a0" img-lg="https://dsx.weather.com//util/image/w/cfnsn9awcaewzpj.jpg?v=at&w=485&h=273&api=7db9fe61-7414-47b5-9871-e17d87b8b6a0" img-md="https://dsx.weather.com//util/image/w/cfnsn9awcaewzpj.jpg?v=at&w=320&h=180&api=7db9fe61-7414-47b5-9871-e17d87b8b6a0" img-sm="https://dsx.weather.com//util/image/w/cfnsn9awcaewzpj.jpg?v=at&w=155&h=114&api=7db9fe61-7414-47b5-9871-e17d87b8b6a0" img-xs="https://dsx.weather.com//util/image/w/cfnsn9awcaewzpj.jpg?v=at&w=85&h=64&api=7db9fe61-7414-47b5-9871-e17d87b8b6a0" data-twc-asset="slideshow.assets[slideshow.currentIndex 
<div title="Next Image" class="image-left-arrow image-hover-icons" data-ng-class="{false : 'notActive'}[slideshow.currentIndex
Snow falls on a sidewalk in Philadelphia, Pennsylvania, on April 9, 2016. (Twitter/J. Coleman)
<span class="wx-iconfont-global wx-icon-arrow-right-2 active" data-ng-class="{true : 'active'}[currentSet
0]">
   |
|
