Tornado in Brooklyn? 'Weak Rotation' Says National Weather Service UPDATED

UPDATE: As of 6:57 p.m.: B,D,F,M lines suspended due to downed trees. Delayed 7 service. L train suspended. Check for status updates here.

More updates below.

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The National Weather Service issued this alert at 5:42 p.m. today. It expires at 6:15 p.m. (A flood advisory is in effect till 7 p.m.)

THE NATIONAL WEATHER SERVICE IN UPTON NY HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... QUEENS COUNTY IN SOUTHEAST NEW YORK... SOUTHERN NASSAU COUNTY IN SOUTHEAST NEW YORK... KINGS (BROOKLYN) COUNTY IN SOUTHEAST NEW YORK... * UNTIL 615 PM EDT... * 

AT 540 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING QUARTER SIZE HAIL...AND DESTRUCTIVE WINDS IN EXCESS OF 70 MPH. THESE STORMS WERE LOCATED ALONG A LINE EXTENDING FROM CANARSIE TO CONEY ISLAND...OR ALONG A LINE EXTENDING FROM CROWN HEIGHTS TO CONEY ISLAND...AND MOVING EAST AT 40 MPH. *

Instructions: DOPPLER RADAR HAS INDICATED SOME WEAK ROTATION WITHIN THIS STORM. WHILE NOT IMMEDIATELY LIKELY...A TORNADO MAY STILL DEVELOP. IF A TORNADO IS SPOTTED...ACT QUICKLY AND MOVE TO A PLACE OF SAFETY IN A STURDY STRUCTURE...SUCH AS A BASEMENT OR SMALL INTERIOR ROOM.

UPDATE: WYDNKBYANM has some Park Slope photos here.

UPDATE: Daily News says wind reached 100 mph.

UPDATE: zhaus has crazy storm photos here. And here.

UPDATE: Hail the size of quarters in Brooklyn Heights. Pedestrians huddled under awnings, inside restaurants. 

UPDATE: 7 p.m.:  Roughly 450 customers lost power near Kings Plaza Shopping Center on East 38th Street.

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