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Massive Historic Blizzard!!! 967 mb Major Nor'easter!!! Snow already making its way into Upstate NY...
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[quote:DoorBert:MV8yMTI4NTk5XzM1OTgwNjY0X0JFRTc5QUU4] Serious coastal flooding expected in Massachusetts The high winds from the storm will drive a damaging storm surge of 2 - 4' along the coast of Eastern Massachusetts Friday night and Saturday morning. Of particular concern is the flooding that will occur during the Saturday morning high tide cycle, as that is the time of the new moon, which will bring the highest tide of the month. The ocean's height in Boston varies naturally by about ten feet between low tide and high tide, so it matters greatly when the storm surge arrives, relative to the tidal cycle. Thus we speak of the "storm tide"--how how the water gets above the high tide mark, due to the combination of the storm surge and the tide. During Hurricane Sandy, on October 29, 2012, a potentially very damaging storm surge of 4.57' hit Boston, but arrived near low tide, so the water level during the peak surge did not rise above the normal high tide mark. As of noon EST on February 7, 2013, the latest storm surge forecast from the GFS model is calling for a storm tide of about 3.4' above high tide (MHHW, Mean Higher High Water) on Saturday morning, which would cause only minor flooding in Boston. This would be the 10th highest water level on record in Boston since tide gauge records began in 1921. According to former NHC storm surge expert Mike Lowry, who now works for TWC, the official top 5 storm tides at the Boston tide gauge, relative to MHHW, are: 1. 4.82' - February 7, 1978 (Blizzard of 1978) 2. 3.92' - January 2, 1987 3. 3.86' - October 30, 1991 (Perfect Storm) 4. 3.76' - January 28, 1979 5. 3.75' - December 12, 1992 More serious flooding is expected in Cape Cod Bay to the southeast of Boston, where the northeast winds from the storm will pile up a higher storm surge. A storm surge of 3 - 4' is predicted from Scituate to Sandwich Harbor Saturday morning. The surge will be accompanied by battering waves 20' feet high, and major flooding and coastal erosion is expected. Major coastal flooding is also expected on the east end of Nantucket Island. http://www.wunderground.com/hurricane/2013/feb7_surge.png [/quote]
Original Message
Ryan Maue‏@RyanMaue
GFS 12z apparently uses the groundhog as part of its data package: 10-15 day forecast froze-solid USA. [
link to twitter.com
]
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