Alert archive / New York / Severe Thunderstorm Watches in 2003
Severe Thunderstorm Watch 910
The Storm Prediction Center issued this severe thunderstorm watch at Aug 29, 2003, 3:35 PM EDT for 39 counties in New York. It was in force for 5 hr.
The area
The outline as issued.
The facts
- Issued
- Aug 29, 2003, 3:35 PM EDT (19:35 UTC)
- Expired
- Aug 29, 2003, 9:00 PM EDT
- In force
- 5 hr
- Issued by
- the Storm Prediction Center
All 39 counties
Albany County, NY, Allegany County, NY, Broome County, NY, Cayuga County, NY, Chemung County, NY, Chenango County, NY, Columbia County, NY, Cortland County, NY, Delaware County, NY, Fulton County, NY, Genesee County, NY, Greene County, NY, Hamilton County, NY, Herkimer County, NY, Lewis County, NY, Livingston County, NY, Madison County, NY, Monroe County, NY, Montgomery County, NY, Oneida County, NY, Onondaga County, NY, Ontario County, NY, Orleans County, NY, Oswego County, NY, Otsego County, NY, Rensselaer County, NY, Saratoga County, NY, Schenectady County, NY, Schoharie County, NY, Schuyler County, NY, Seneca County, NY, Steuben County, NY, Tioga County, NY, Tompkins County, NY, Warren County, NY, Washington County, NY, Wayne County, NY, Wyoming County, NY, Yates County, NY
Warnings issued inside it
1 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 29, 4:32 PM EDT | Severe Thunderstorm Warning | ALY | Hamilton | 43 min |
Discussions around it
SPC mesoscale discussions over the same counties from four hours before the watch to its end.
The nearest sounding before it
Buffalo Intl Airport, NY (KBUF), launched 12:00Z, 7.6 hours before the alert went out and 186 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.
- Mixed-layer CAPE
- 1055 J/kg
- Mixed-layer CIN
- -42 J/kg
- Mixed-layer LCL
- 850 m above ground
- 0-6 km bulk shear
- 39 kt
- 0-1 km storm-relative helicity
- 194 m²/s²
- 0-3 km storm-relative helicity
- 232 m²/s²
- Significant tornado parameter
- 1.2
- Supercell composite
- 12.6
The text
As transmitted, in the capitals the NWS used until 2016.
000
WWUS20 KWNS 291933
SEL0
SPC WW 291935
NYZ000-LOZ000-300100-
URGENT - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WATCH NUMBER 910
NWS STORM PREDICTION CENTER NORMAN OK
335 PM EDT FRI AUG 29 2003
THE NWS STORM PREDICTION CENTER HAS ISSUED A
SEVERE THUNDERSTORM WATCH FOR PORTIONS OF
NEW YORK
LAKE ONTARIO
EFFECTIVE THIS FRIDAY AFTERNOON AND EVENING FROM 335 PM UNTIL 900
PM EDT.
HAIL TO 2 INCHES 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
NORTH AND SOUTH OF A LINE FROM 45 MILES WEST SOUTHWEST OF
ROCHESTER NEW YORK TO 20 MILES SOUTHEAST OF GLENS FALLS 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 908. WATCH NUMBER 908 WILL NOT BE
IN EFFECT AFTER 335 PM EDT. CONTINUE...WW 909...
DISCUSSION...BANDS OF STRONG/SEVERE THUNDERSTORMS WILL CONTINUE MOVE
ACROSS MUCH OF NY UNTIL AFTER DARK WHEN AIR MASS WILL BEGIN TO
STABILIZE. 30-40KT OF SHEAR SUPPORTS POTENTIAL FOR DAMAGING
WINDS...PARTICULARLY WITH ANY BOWS OR SHORT LINES THAT DEVELOP.
AVIATION...A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT
TO 2 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60
KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 550. MEAN STORM
MOTION VECTOR 26035.
...HALES
434,0782 435,0731 421,0731 420,0782SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 29, 10:30 AM EDT | Mesoscale Discussion | SPC | Allegany, Cayuga, Chemung, Cortland, Erie, Franklin and 22 more | 3 hr |
| Aug 29, 10:55 AM EDT | Severe Thunderstorm Watch | SPC | Allegany, Cattaraugus, Cayuga, Clinton, Erie, Essex and 22 more | 5 hr |
| Aug 29, 1:32 PM EDT | Mesoscale Discussion | SPC | Broome, Chautauqua, Chemung, Chenango, Cortland, Otsego and 4 more | 2 hr |
| Aug 29, 2:23 PM EDT | Mesoscale Discussion | SPC | Allegany, Cattaraugus, Cayuga, Clinton, Erie, Essex and 22 more | 97 min |
| Aug 29, 6:33 PM EDT | Mesoscale Discussion | SPC | Albany, Broome, Chemung, Chenango, Columbia, Cortland and 20 more | 57 min |
Nearby
Severe Thunderstorm Watches in New York, 2003Every severe thunderstorm watch in 2003
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.