Posts

John Homenuk

NYC Area Forecast: Additional strong storms possible later today

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Strong and severe thunderstorms moved through parts of the Northeast states on Tuesday evening, producing frequent and dangerous lightning as well as strong, gusty winds and torrential rain. There was even a wall cloud spotted in Queens and Nassau counties, as an area of distinct rotation appeared on terminal doppler radar out of Kennedy Airport. This was the third instance of rotating thunderstorms in the NYC area in just over a week.

The threat for strong thunderstorms will continue today as a frontal boundary slowly sinks towards the region. Instability is expected to build once again by this afternoon across the Northern Mid-Atlantic States with ample heating and a continued source of moisture (you may have noticed that it is very humid outside). As better forcing for storm development approaches later today, thunderstorms are expected to increase in coverage once again.

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Miguel Pierre

FREE 1/30/17 AM Zones 4/5 (Southeast NJ) Update on Light Snow

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Regional mesoscale analysis this morning revealed a small, weak area of low pressure near the Delmarva shores drifting gradually northeastwards into the Atlantic. As expected, this low pressure area is developing as a result of a favorably positioned disturbance in the mid levels of the atmosphere, and is also aiding in the development of bands of snow over Southeastern NJ at this hour. This low pressure is expected to continue to track east/northeast over the next few hours.

Local observations and radar analysis confirms that steady or accumulating snow is struggling to make northward progress throughout the state, with banding settled over Cape May, Atlantic, and Southeast Ocean counties. This banding is occurring as a result of enhanced lift in the atmosphere, which works to produce steadier and heavier precipitation. This lift is being enhanced by temperature gradients and wind gradients in the atmosphere, with frontogenesis at the 850mb level (about 5000 feet above your head) aiding in its development.

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