Spring 2016 thread (Northern Hemisphere) (temperatures, day, storms, city)
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Classic extension of the Bermuda High and ridge poking into the region. Notice the clouds around the ridge.
Classic case of being an island as well. Bermuda should be in the 90s right now being right underneath it.
Thank the Pacific for this pattern we have past few days... Here's whats coming up.
Quote:
Prognostic Discussion for Experimental Week 3-4 Outlook
NWS Climate Prediction Center College Park MD
300PM EDT Fri May 27 2016
Week 3-4 Forecast Discussion Valid Sat Jun 11 2016-Fri Jun 24 2016
The ECMWF and CFS are in broadly good agreement, with some key differences resulting in increased uncertainty. Both models agree on anomalous troughing in the Northeast Pacific, near and southeast of the Aleutians. The models diverge somewhat in the evolution of the wave train eastward from that center. Those differences could be related to timing, as both models show troughing moving through the ridge near the West Coast into the northern Rockies and Northern Plains. This happens earlier in the CFS, and later in the ECMWF. As a result, the CFS has a cooler solution over the Northern tier of the U.S.
The general consensus between the two is for near to slightly below normal 500-hPa heights over the northern CONUS, and above normal heights over the Southeast. A weak frontal zone is inferred near the Mississippi Valley, with enhanced odds of above median precipitation indicated from parts of Texas northeastward toward the southern Great Lakes region.
Looking at the map, we're at the edge of that cool cloudy airflow that's keeping Boston cool. High was at 1 pm (82°F). Dew point down a couple degrees, not much but still helps with the breeze.
Boston can't be under the ridge, but it appears so from the map. Some air from the north "snuck" in at the ridge's edge?
Backdoor "surface" cold front. Winds from the NE at the surface and from the southwest aloft as shown above with map.
That cold front qas supposed to make it down here...nope.. something stopped it. Either too strong a ridge with SW flow or too weak a cold front from gulf of Maine
When the weather systems are traveling in a normal pattern, cold fronts arrive from the west.
A back door cold front is a cold front that approaches from the east or northeast. This type of front can occur when the clockwise rotation around a high pressure system brings colder air toward the south and west. The term “back door cold front” is most commonly used here in the Maritimes and the northeast U.S. when cool Atlantic maritime air moves in from the east or northeast and replaces warmer continental air. A stalled low over Newfoundland is the culprit this time. In fact, it served up snow across northern NB overnight. So, that’s what happened to yesterday’s heat; it was 20 in Truro - it’s only 6 degrees right now. In Moncton, it was 22 degrees yesterday afternoon – at 11 o’clock this morning, the wind chill is -2.
Boston dropping in temp this afternoon. Nuts. Now 56? Low 50s in the suburbs!
Updated map. Temps and Surface wind flow.
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