PUBLIC INFORMATION STATEMENT
NATIONAL WEATHER SERVICE NEW YORK NY
549 PM EDT WED APR 22 2020
...GUSTNADO CONFIRMED OVER THE HARLEM RIVER ON APRIL 21ST...
VIDEO EVIDENCE INDICATES A GUSTNADO OCCURRED OVER THE HARLEM RIVER
AROUND 230PM IN THE AFTERNOON ON TUESDAY APRIL 21ST, 2020. THE
GUSTNADO WAS FILMED MOVING OVER THE HARLEM RIVER, SOUTH OF THE
BROADWAY BRIDGE THAT CONNECTS NORTHERN MANHATTAN AND THE BRONX,
BEFORE DISSIPATING OVER THE BRONX SHORELINE NORTH OF FORDHAM ROAD.
RADAR VELOCITY ESTIMATES AND A MESONET OBSERVATION OF 71 MPH FROM
FORDHAM IN THE BRONX INDICATES ESTIMATED STRAIGHT LINE WIND
SPEEDS OF 70-75 MPH.
A GUSTNADO IS A SMALL WHIRLWIND WHICH FORMS AS AN EDDY IN
THUNDERSTORM OUTFLOWS. THEY DO NOT CONNECT WITH ANY CLOUD-BASE
ROTATION AND ARE NOT TORNADOES. SINCE THEIR ORIGIN IS ASSOCIATED
WITH CUMULIFORM CLOUDS, GUSTNADOES ARE OFFICIALLY CLASSIFIED
AS THUNDERSTORM WIND EVENTS BY THE NATIONAL WEATHER SERVICE. LIKE
DUST DEVILS, SOME STRONGER GUSTNADOES CAN CAUSE DAMAGE.
A SEVERE THUNDERSTORM WARNING WAS INITIALLY ISSUED BY NWS NEW
YORK FOR THIS AREA AT 212PM TUESDAY AFTERNOON AS A SEVERE LINE OF
THUNDERSTORMS APPROACHED, WITH A SEVERE WEATHER STATEMENT
INDICATING THE POSSIBILITY OF A TORNADO ISSUED AT 227PM.
STRENGTHENING STORM RELATIVE VELOCITY ROTATION WAS DETECTED BY
FORECASTERS ON BOTH THE NEWARK LIBERTY INTERNATIONAL AIRPORT AND
JOHN F KENNEDY INTERNATIONAL AIRPORT TERMINAL DOPPLER RADARS,
PROMPTING THE UPGRADED ISSUANCE OF A TORNADO WARNING AT 233PM. AT
THIS POINT THOUGH, OBSERVATIONAL EVIDENCE IS INCONCLUSIVE OF A
TORNADO TOUCHDOWN. IF ANYONE HAS VIDEO OR PICTURES OF THIS STORM
FROM THIS AREA BETWEEN 220PM AND 240PM ON TUESDAY APRIL 21ST,
PLEASE SEND TO
[email protected] TO AID OUR FURTHER EVALUATION
OF THIS EVENT.
THANK YOU TO ALL OF OUR EMERGENCY MANAGEMENT, SPOTTERS, AND MEDIA
PARTNERS FOR YOUR ASSISTANCE DURING AND AFTER THE SEVERE WEATHER
EVENT OF APRIL 21ST, 2020.