Tag Archive for 'frequent lightning'
November 15th, 2008 by Steven DiMartino
A disturbance ahead of the cold front is currently driving through the forecast area, which is produce a narrow yet powerful line of strong to severe thunderstorms. There is growing wind shear ahead and along this line of thunderstorms which will support the potential for an isolated tornado.
The main threat from this line of thunderstorms [...]
November 6th, 2008 by Steven DiMartino
This period will see a rather extreme swing in weather conditions over the next 66 hours.
The upper low and coastal low that brought have rainfall to the forecast area overnight is beginning to weaken and lift to the north and east. With significantly moist air trapped below 850 MB, a cloudy day can be expected. [...]
September 9th, 2008 by Steven DiMartino
A line of strong thunderstorms and very heavy rain is beginning to move through the forecast area this morning. The line of strong thunderstorms is currently impacting northeastern Pennsylvania through the central Hudson Valley, and will slowly move through the entire forecast area this morning through the early evening hours. Rainfall rates with these strong [...]
July 3rd, 2008 by Steven DiMartino
Today, there are two main focuses of severe weather, which both can be attributed to a strong cold front moving south over the Great Lakes and the Plains.
Over the Northeast, the combination of a strong cold front at surface and impressive wind shear aloft along with an unstable atmosphere will lead to the development [...]
July 1st, 2008 by Steven DiMartino
An upper level disturbance over West Virginia will track towards the forecast area this afternoon and evening. The atmosphere over the New York City and Philadelphia metropolitian areas are already close to convective temperatures and the cap over the area is weakening rapidly. The enhance lifting combined with the cool, dry air aloft will support [...]
June 29th, 2008 by Steven DiMartino
The line of thunderstorms moving towards the forecast area has a high chance of intensifying due to the atmosphere ahead of these thunderstorms.
Currently temperatures are in the upper 70’s to lower 80’s with dew points in the upper 60’s to lower 70’s, which is a very warm, humid, and unstable atmosphere to move into. [...]
June 27th, 2008 by Steven DiMartino
Strong and severe thunderstorms are moving towards Philadelphia, southern New Jersey, and central New Jersey over the next few hours.
A line of strong thunderstorms to the south and west of Reading, Pennsylvania will move towards Lancaster, Chester, Berks, Montgomery, Bucks, Delaware, and Philadelphia Counties over the next 3 hours. These thunderstorms have remained strong [...]
June 22nd, 2008 by Steven DiMartino
The focus of the severe weather is basically revolve around the upper low over central Ontario. A series of disturbances will rotate around the upper low, which will produce strong to severe thunderstorms from the northern Plains, central Plains, to the Ohio Valley, and then towards the Northeast and Mid Atlantic. The strongest thunderstorms will [...]
June 16th, 2008 by Steven DiMartino
I will be away from the computer the rest of the afternoon due to some unavoidable tasks that I’ll have to take care of. So here is what I think will unfold for the rest of the afternoon.
When I look at the combination of recent surface observations along with visible and water vapor satellite images, [...]