Alert archive / New York / Severe Thunderstorm Watches in 2002

Severe Thunderstorm Watch 545

July 28, 200235 counties in New York; Bradford County, Susquehanna County, Wayne County, Pennsylvania

The Storm Prediction Center issued this severe thunderstorm watch at Jul 28, 2002, 5:30 PM EDT for 35 counties in New York; Bradford County, Susquehanna County, Wayne County, Pennsylvania. It was in force for 6 hr.

The area

The outline as issued.

The facts

Issued: Jul 28, 2002, 5:30 PM EDT (21:30 UTC)
Expired: Jul 28, 2002, 11:00 PM EDT
In force: 6 hr
Issued by: the Storm Prediction Center

All 38 counties

Albany County, NY, Broome County, NY, Cayuga County, NY, Chemung County, NY, Chenango County, NY, Columbia County, NY, Cortland County, NY, Delaware County, NY, Dutchess County, NY, Fulton County, NY, Greene County, NY, Hamilton County, NY, Herkimer County, NY, Jefferson County, NY, Lewis County, NY, Madison County, NY, Montgomery County, NY, Oneida County, NY, Onondaga County, NY, Ontario County, NY, Oswego County, NY, Otsego County, NY, Saratoga County, NY, Schenectady County, NY, Schoharie County, NY, Schuyler County, NY, Seneca County, NY, Steuben County, NY, Sullivan County, NY, Tioga County, NY, Tompkins County, NY, Ulster County, NY, Warren County, NY, Wayne County, NY, Yates County, NY, Bradford County, PA, Susquehanna County, PA, Wayne County, PA

Warnings issued inside it

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

Issued	Product	Office	Counties	Lasted
Jul 28, 5:43 PM EDT	Severe Thunderstorm Warning	BUF	Cayuga, Wayne	62 min
Jul 28, 6:17 PM EDT	Severe Thunderstorm Warning	BGM	Cayuga, Onondaga	43 min
Jul 28, 6:33 PM EDT	Tornado Warning	BGM	Onondaga	27 min
Jul 28, 7:18 PM EDT	Severe Thunderstorm Warning	BGM	Oneida	27 min
Jul 28, 7:21 PM EDT	Severe Thunderstorm Warning	ALY	Herkimer	39 min

The nearest sounding before it

Albany, NY (KALY), launched 12:00Z, 9.5 hours before the alert went out and 183 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 869 m above ground
0-6 km bulk shear: 35 kt
0-1 km storm-relative helicity: 30 m²/s²
0-3 km storm-relative helicity: 143 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 282128
SEL5  
SPC WW 282130
NYZ000-PAZ000-LOZ000-290300-

URGENT - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WATCH NUMBER 545
STORM PREDICTION CENTER NORMAN OK
530 PM EDT SUN JUL 28 2002

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

   NEW YORK                           
   NORTHEAST PENNSYLVANIA                       
   LAKE ONTARIO                       

EFFECTIVE THIS SUNDAY AFTERNOON AND EVENING FROM 530 PM UNTIL 1100
PM EDT.

HAIL TO 2 INCHES IN DIAMETER...THUNDERSTORM WIND GUSTS TO 80
MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS.

THE SEVERE THUNDERSTORM WATCH AREA IS ALONG AND 80 STATUTE MILES
NORTH AND SOUTH OF A LINE FROM 10 MILES SOUTH OF ROCHESTER NEW YORK
TO 15 MILES EAST SOUTHEAST OF ALBANY 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...  CONTINUE...WW 542...WW 543...WW 544...

DISCUSSION...WITH A VERY MOIST AND UNSTABLE AIR MASS IN PLACE
ACROSS WW AREA...STORMS DEVELOPING OVER WRN NY EXPECTED TO
INTENSIFY AND MOVE EWD IN FAST WLY FLOW.  SHEAR PROFILES SUPPORT
STORMS DEVELOPING INTO SHORT LINES/BOW ENHANCING WIND DAMAGE
POTENTIAL.


AVIATION...A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT
TO 2 INCHES.  EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 70
KNOTS.  A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 550.  MEAN STORM
MOTION VECTOR 27035.


...HALES

440,0774 434,0733 413,0733 414,0774

SPC that day

Everything else SPC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jul 28, 2:50 PM EDT	Tornado Watch	SPC	Armstrong, Butler, Cameron, Centre, Clarion, Clearfield and 17 more	5 hr

Nearby

Severe Thunderstorm Watches in New York, 2002 Severe Thunderstorm Watches in Pennsylvania, 2002 Every 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.