griteater Posted March 27, 2018 Author Share Posted March 27, 2018 3 Snowstorms: 500mb wave tracks & tilt Source: griteater Link to comment Share on other sites More sharing options...
griteater Posted March 27, 2018 Author Share Posted March 27, 2018 Early January Cold Wave The average temperature in Greenville, NC for the period from December 28 to January 8 was 23.4 degrees. This was the coldest of any 12-day period in the historical record, for any month, dating back to 1897. Link to comment Share on other sites More sharing options...
griteater Posted March 27, 2018 Author Share Posted March 27, 2018 Early January Cold Wave The last time it was this cold, they drove a car on the Yadkin River in Elkin, NC (winter of 1917-1918). Source: Surry County Historical Society - http://surrycounty.pastperfectonline.com/photo/F57129DC-B587-492B-8753-585554254989 Link to comment Share on other sites More sharing options...
griteater Posted March 27, 2018 Author Share Posted March 27, 2018 Early January Cold Wave This time, they played ice hockey on a frozen pond in Wilmington, NC (Source: Kailey Tracy, wect.com) Link to comment Share on other sites More sharing options...
griteater Posted March 27, 2018 Author Share Posted March 27, 2018 Early January Cold Wave Alligators at Shallotte River Swamp Park in southeast NC went into a state of brumation in order to survive in the icy waters. Source: http://www.wcnc.com/article/news/local/regional/breathtaking-video-shows-group-of-alligators-surviving-frozen-nc-river/275-506294769 Link to comment Share on other sites More sharing options...
griteater Posted March 27, 2018 Author Share Posted March 27, 2018 Early January Cold Wave Water fountains froze in Charlotte (Source: AP Photo / Chuck Burton) Link to comment Share on other sites More sharing options...
griteater Posted March 27, 2018 Author Share Posted March 27, 2018 Early January Cold Wave They walked on a fast flowing, yet frozen, Looking Glass Falls near Brevard, NC (Source: James Harrison, twitter @jharrisonAVL) Link to comment Share on other sites More sharing options...
griteater Posted March 27, 2018 Author Share Posted March 27, 2018 Early January Cold Wave Temperatures fell below zero across parts of North Carolina (Source: Eric Webb, twitter @webberweather) Link to comment Share on other sites More sharing options...
griteater Posted March 27, 2018 Author Share Posted March 27, 2018 Early January Cold Wave Checkout the video of this man attempting to get into his car on an icy driveway in Maryland during the cold wave (Source: twitter @payton_besecker) Link to comment Share on other sites More sharing options...
griteater Posted March 27, 2018 Author Share Posted March 27, 2018 Early January Cold Wave 500mb pattern during the cold wave Link to comment Share on other sites More sharing options...
griteater Posted March 27, 2018 Author Share Posted March 27, 2018 Early January Cold Wave CONUS temperature departures during the cold wave Link to comment Share on other sites More sharing options...
griteater Posted March 27, 2018 Author Share Posted March 27, 2018 February Warmth February 10-25 was the warmest 16 day period of any winter month, of any year on record for a number of sites, including: Asheville, Charlotte, Greenville-Spartanburg, Columbia, Atlanta, and Augusta Here are the record warm temperatures for Asheville: Link to comment Share on other sites More sharing options...
griteater Posted March 27, 2018 Author Share Posted March 27, 2018 February Warmth CONUS temperature anomalies during the February warm spell Link to comment Share on other sites More sharing options...
griteater Posted March 27, 2018 Author Share Posted March 27, 2018 February Warmth There were record breaking 500mb heights (high and low) during February across the Pacific / North America sector Link to comment Share on other sites More sharing options...
griteater Posted March 27, 2018 Author Share Posted March 27, 2018 Sudden Stratospheric Warming (SSW) / Subsequent -NAO / Upper Southeast Snowfalls An official, major SSW occurred on Feb 11th. This was the first official SSW since Jan 2013. Zonal wind reversal from westerly (positive values) to easterly (negative values) during February here shown at 10mb, at 65 deg N. Source: Hannah Attard - http://www.atmos.albany.edu/student/hattard/realtime.php Link to comment Share on other sites More sharing options...
griteater Posted March 27, 2018 Author Share Posted March 27, 2018 Sudden Stratospheric Warming (SSW) / Subsequent -NAO / Upper Southeast Snowfalls Chart from JMA shows the sudden temperature rise in the stratosphere at 30mb in February over the North Pole Source: Tokyo Climate Center - http://ds.data.jma.go.jp/tcc/tcc/products/clisys/STRAT/ Link to comment Share on other sites More sharing options...
griteater Posted March 27, 2018 Author Share Posted March 27, 2018 Sudden Stratospheric Warming (SSW) / Subsequent -NAO / Upper Southeast Snowfalls 10mb temperature anomaly animation of the SSW Link to comment Share on other sites More sharing options...
griteater Posted March 27, 2018 Author Share Posted March 27, 2018 Sudden Stratospheric Warming (SSW) / Subsequent -NAO / Upper Southeast Snowfalls Two weeks after the SSW, a retrograding NAO blocking episode ensued. The NAO was negative every day from 2/25 to 3/21, or 25 straight days. 500mb pattern during the NAO blocking episode shown in the chart below. While the Atlantic pattern was favorable for wintry precipitation in the southeast, the Pacific pattern was unfavorable. In spite of that, the northern sections of the southeast states have seen a few wintry events in March. Link to comment Share on other sites More sharing options...
griteater Posted March 27, 2018 Author Share Posted March 27, 2018 Sudden Stratospheric Warming (SSW) / Subsequent -NAO / Upper Southeast Snowfalls March 12-14 Southeast Snowfall Map Link to comment Share on other sites More sharing options...
griteater Posted March 27, 2018 Author Share Posted March 27, 2018 Sudden Stratospheric Warming (SSW) / Subsequent -NAO / Upper Southeast Snowfalls March 12-14 NC Snowfall Map (Source: Eric Webb, twitter @webberweather) Link to comment Share on other sites More sharing options...
griteater Posted March 27, 2018 Author Share Posted March 27, 2018 Sudden Stratospheric Warming (SSW) / Subsequent -NAO / Upper Southeast Snowfalls March 20-21 Southeast Snowfall Map Link to comment Share on other sites More sharing options...
griteater Posted March 27, 2018 Author Share Posted March 27, 2018 Sudden Stratospheric Warming (SSW) / Subsequent -NAO / Upper Southeast Snowfalls March 20-21 NC Snowfall Map (Source: Eric Webb, twitter @webberweather) Link to comment Share on other sites More sharing options...
griteater Posted March 27, 2018 Author Share Posted March 27, 2018 Sudden Stratospheric Warming (SSW) / Subsequent -NAO / Upper Southeast Snowfalls March 24-25 Southeast Snowfall Map Link to comment Share on other sites More sharing options...
griteater Posted March 27, 2018 Author Share Posted March 27, 2018 Sudden Stratospheric Warming (SSW) / Subsequent -NAO / Upper Southeast Snowfalls March 24-25 NC Snowfall Map (Source: Eric Webb, twitter @webberweather) Link to comment Share on other sites More sharing options...
griteater Posted March 27, 2018 Author Share Posted March 27, 2018 Sudden Stratospheric Warming (SSW) / Subsequent -NAO / Upper Southeast Snowfalls March 24-25 Snowfall – Bluefield, WV (Source: Ross Harris, twitter @crhwx_wvva) Link to comment Share on other sites More sharing options...
griteater Posted March 27, 2018 Author Share Posted March 27, 2018 Sudden Stratospheric Warming (SSW) / Subsequent -NAO / Upper Southeast Snowfalls March 24-25 Snowfall – Link to full storm radar loop http://mesonet.agron.iastate.edu/current/mcview.phtml?prod=usrad&java=script&mode=archive&frames=125&interval=15&year=2018&month=3&day=24&hour=0&minute=0 Link to comment Share on other sites More sharing options...
griteater Posted March 27, 2018 Author Share Posted March 27, 2018 Sudden Stratospheric Warming (SSW) / Subsequent -NAO / Upper Southeast Snowfalls March 24-25 Snowfall – Southwest flow at 850mb delivering moisture into a deformation zone over southern VA https://earth.nullschool.net/#2018/03/24/2100Z/wind/isobaric/850hPa/orthographic=-83.37,35.54,1607 Link to comment Share on other sites More sharing options...
griteater Posted March 27, 2018 Author Share Posted March 27, 2018 Sudden Stratospheric Warming (SSW) / Subsequent -NAO / Upper Southeast Snowfalls The -NAO pattern produced 4 noreasters in March alone for the Northeast and Mid-Atlantic states (Source: twitter @weatherchannel) Link to comment Share on other sites More sharing options...
griteater Posted March 27, 2018 Author Share Posted March 27, 2018 After a lengthy winter, spring begins next week in Augusta Link to comment Share on other sites More sharing options...
Eric Posted March 28, 2018 Share Posted March 28, 2018 Isle of Palms, SC - Image credit to Windjammer webcam. Drayton Hall Charleston, SC - Photo credit to Drayton Hall. Have to remember this one come summer when the temperature is 95° and the dewpoint is 78°. Link to comment Share on other sites More sharing options...
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