Alert archive / New York / Severe Thunderstorm Watches in 2002

Severe Thunderstorm Watch 22

March 9, 20024 states

The Storm Prediction Center issued this severe thunderstorm watch at Mar 9, 2002, 11:30 PM EST for 4 states. It was in force for 4 hr.

The area

The outline as issued.

The facts

Issued
Mar 9, 2002, 11:30 PM EST (04:30 UTC)
Expired
Mar 10, 2002, 3:00 AM EST
In force
4 hr
Issued by
the Storm Prediction Center
All 70 counties

Bergen County, NJ, Burlington County, NJ, Camden County, NJ, Essex County, NJ, Hudson County, NJ, Hunterdon County, NJ, Mercer County, NJ, Middlesex County, NJ, Monmouth County, NJ, Morris County, NJ, Ocean County, NJ, Passaic County, NJ, Somerset County, NJ, Sussex County, NJ, Union County, NJ, Warren County, NJ, Albany County, NY, Bronx County, NY, Chenango County, NY, Clinton County, NY, Columbia County, NY, Delaware County, NY, Dutchess County, NY, Essex County, NY, Franklin County, NY, Fulton County, NY, Greene County, NY, Hamilton County, NY, Herkimer County, NY, Kings County, NY, Montgomery County, NY, New York County, NY, Oneida County, NY, Orange County, NY, Otsego County, NY, Putnam County, NY, Rensselaer County, NY, Richmond County, NY, Rockland County, NY, Saratoga County, NY, Schenectady County, NY, Schoharie County, NY, St. Lawrence County, NY, Sullivan County, NY, Ulster County, NY, Warren County, NY, Washington County, NY, Westchester County, NY, Berks County, PA, Bucks County, PA, Carbon County, PA, Chester County, PA, Delaware County, PA, Lackawanna County, PA, Lancaster County, PA, Lehigh County, PA, Luzerne County, PA, Monroe County, PA, Montgomery County, PA, Northampton County, PA, Philadelphia County, PA, Pike County, PA, Susquehanna County, PA, Wayne County, PA, Addison County, VT, Chittenden County, VT, Franklin County, VT, Grand Isle County, VT, Lamoille County, VT, Rutland County, VT

The radar

The Binghamton radar (KBGM), 97 km from the middle of the area, began a volume at 04:34 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

Warnings issued inside it

9 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.

IssuedProductOfficeCountiesLasted
Mar 9, 11:39 PM ESTSevere Thunderstorm WarningPHIBerks51 min
Mar 9, 11:43 PM ESTSevere Thunderstorm WarningPHICarbon32 min
Mar 10, 12:05 AM ESTSevere Thunderstorm WarningPHILehigh, Monroe, Northampton55 min
Mar 10, 12:07 AM ESTSevere Thunderstorm WarningBGMDelaware, Otsego, Sullivan53 min
Mar 10, 12:15 AM ESTSevere Thunderstorm WarningBGMDelaware, Otsego, Sullivan60 min
Mar 10, 12:56 AM ESTSevere Thunderstorm WarningPHIWarren34 min
Mar 10, 1:03 AM ESTSevere Thunderstorm WarningPHISussex42 min
Mar 10, 1:19 AM ESTSevere Thunderstorm WarningPHIMorris41 min
Mar 10, 2:12 AM ESTSevere Thunderstorm WarningPHIMercer18 min

The nearest sounding before it

Albany, NY (KALY), launched 00:00Z, 4.5 hours before the alert went out and 128 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.

Skew-T log-pSkew-T log-p diagram, Albany, NY at 00:00Z on 2002-03-10Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Albany, NY at 00:00Z on 2002-03-10The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 219 square meters per square second.19395878Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
1042 m above ground
0-6 km bulk shear
28 kt
0-1 km storm-relative helicity
219 m²/s²
0-3 km storm-relative helicity
513 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

000 
WWUS20 KWNS 100415
SEL2  
SPC WW 100406
NJZ000-NYZ000-PAZ000-VTZ000-CWZ000-100800-

URGENT - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WATCH NUMBER 22
STORM PREDICTION CENTER NORMAN OK
1106 PM EST SAT MAR 9 2002

THE STORM PREDICTION CENTER HAS ISSUED A
SEVERE THUNDERSTORM WATCH FOR PORTIONS OF

   NORTHERN AND CENTRAL NEW JERSEY                         
   EASTERN NEW YORK                           
   EASTERN PENNSYLVANIA                       
   WESTERN VERMONT                            
   COASTAL WATERS                     

EFFECTIVE THIS SATURDAY NIGHT AND SUNDAY MORNING FROM 1130 PM UNTIL
300 AM EST.

HAIL TO 1 INCH IN DIAMETER...THUNDERSTORM WIND GUSTS TO 70
MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS.

THE SEVERE THUNDERSTORM WATCH AREA IS ALONG AND 60 STATUTE MILES
EAST AND WEST OF A LINE FROM 10 MILES SOUTH SOUTHWEST OF
PHILADELPHIA PENNSYLVANIA TO 25 MILES NORTH NORTHWEST OF PLATTSBURG
NEW YORK.

REMEMBER...A SEVERE THUNDERSTORM WATCH MEANS CONDITIONS ARE
FAVORABLE FOR SEVERE THUNDERSTORMS IN AND CLOSE TO THE WATCH AREA. 
PERSONS IN THESE AREAS SHOULD BE ON THE LOOKOUT FOR THREATENING
WEATHER CONDITIONS AND LISTEN FOR LATER STATEMENTS AND POSSIBLE
WARNINGS.  SEVERE THUNDERSTORMS CAN AND OCCASIONALLY DO PRODUCE
TORNADOES.

OTHER WATCH INFORMATION...THIS SEVERE THUNDERSTORM WATCH REPLACES
SEVERE THUNDERSTORM WATCH NUMBER 21.  WATCH NUMBER 21 WILL NOT BE
IN EFFECT AFTER 1130 PM EST.

DISCUSSION...LINE OF CONVECTION MOVING THROUGH WRN NY/CENTRAL PA
REMAINS SEVERE AS IT MOVES ENEWD AT 50 KT. INTENSE UPPER LEVEL
SHORTWAVE TROUGH IS ACCELERATING NEWD WITH STRONG MID/HIGH LEVEL
SUBSIDENCE AIDING IN 60-80 MPH WINDS WITHIN LINE OF CONVECTION.
ISOLATED SEVERE HAIL IS POSSIBLE ACROSS ERN PA/SERN NY/ NJ WHERE
INSTABILITY IS SLIGHTLY STRONGER.
 
AVIATION...A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT
TO 1 INCH EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60 KNOTS. 
A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 350.  MEAN STORM MOTION
VECTOR 25045.

...IMY

450,0722 394,0741 394,0762 450,0745

SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Mar 9, 8:30 PM ESTSevere Thunderstorm WatchSPCBroome, Cayuga, Chemung, Chenango, Cortland, Delaware and 20 more5 hr
Mar 10, 2:00 AM ESTSevere Thunderstorm WatchSPCNassau, Queens, Suffolk, Westchester4 hr

Nearby

Severe Thunderstorm Watches in New York, 2002Severe Thunderstorm Watches in New Jersey, 2002Severe Thunderstorm Watches in Pennsylvania, 2002Every severe thunderstorm watch in 2002

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.