unsettled Archives - Page 27 of 35 - New York Metro Weather

Flooding rains give way to storms, warmer air

May 1, 2014/0 Comments/by John Homenuk

Widespread flooding rains occurred on Wednesday as a significant plume of tropical moisture surged northward along a frontal zone, which was draped near the area. Heavy rain “trained” northeastward from the Mid-Atlantic states towards New Jersey, New York City and parts of Southern New England. Rainfall amounts over 4″ were widespread, especially in parts of Central and Northeastern New Jersey. The result of prolonged heavy rain was widespread river, creek and poor drainage flooding which resulted in some property damage and a significant amount of road closures.

The rainfall, in fact, was as prolific as it seemed. The 4.97″ which fell at New York City’s Central Park was the 10th highest daily rainfall total in the reporting stations history, and the 2nd highest during the month of April. The 7.85″ which fell during the month of April made it the 6th wettest April in the reporting stations history.

24 Hour radar estimated rainfall totals, courtesy of the National Weather Service.

Pleasant start, but heavy rain likely Friday Night

April 25, 2014/0 Comments/by John Homenuk

It is not often, this time of year, that a relatively progressive passing disturbance will force the development of a low pressure system around 995mb off the Northeast US Coast. Exactly that will occur late Friday Night into early Saturday, as a mid and upper level disturbance passing through the Northeast US with some vigor moves toward New England. Forecast models indicate a high likelihood of increasing moisture as well as strengthening lift for precipitation by Friday Night — even some weak instability which could force thunderstorms — along an axis which will shift from west to east. This raises confidence in a period of heavy rain Friday Night into Saturday morning, as the low pressure system passes nearby and eventually into the Gulf of Maine.

Not all will be lost, however. Much of Friday will turn out pleasant. This morning, visible satellite imagery showed only some filtered high clouds moving into the area. High temperatures on most forecast models are expected to reach into the lower 60’s. Most notably, however, the winds which were blustery over the past few days have settled down. As a result, the 60 degree temperatures will feel much more comfortable in the warm sun as opposed to the brisk and blustery winds. Rain is forecast to move into the area after the PM Rush, and will be out of the area by Saturday’s sunrise.

Simulated radar for tonight shows an area of moderate to heavy rain with embedded thunderstorms.

Pleasant, but fire danger through Friday

April 24, 2014/0 Comments/by John Homenuk

Calm weather has settled into the area during the middle part of this week in the wake of a cold front, but gusty winds have ramped up over the last 12 to 24 hours with a tightening pressure gradient over the area. Blustery northwest winds led in a surface high pressure on Wednesday Night, as a low pressure system deepened well off to our north and east. The northwest winds and very low humidity are leading to concern for brush fire spread throughout the area. Subsequently, the National Weather Service has issued a Red Flag Warning for much of the area — save for Long Island, where higher humidity values are present near the coasts.

A Red Flag Warning is issued by the National Weather Service when high winds and low humidity are expected to make conditions favorable for dangerous and rapid spread of brush fires if ignition occurs. Despite the concern for fire spread, pleasant weather will continue — albeit a bit cool of this time of year. Highs in the lower 60’s will be common on Thursday and Friday before a disturbance approaches with a period of rain expected Friday Night.

Very low dew points and gusty winds could cause rapid fire spread today.

PM Update: Milder this week, more wintry by weekend

December 3, 2013/0 Comments/by John Homenuk

The trend towards milder temperatures continues this week, as high temperatures rose into the upper 40’s and the 50’s throughout the area on Tuesday. The modifying airmass and stagnant high pressure are initially to blame this week, with no reinforced source of cold arctic air. But by Wednesday into Thursday, the warm air will be forced northward by a surging warm front and associated storm system moving through the Great Lakes.

The warm front moving northward on Thursday will bring an unseasonably warm airmass with it. Southerly winds will pump in very mild air, with temperatures rising into the 60’s by Thursday afternoon. But the warmth will be short lived, as a cold front moving through the area on Friday will mark the beginning of another infiltration of arctic air.

NAM model showing high temperatures in the lower to middle 60’s in parts of the area on Thursday afternoon.

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