Alert archive / New York / Tornado Watches in 2005
Tornado Watch 735
The Storm Prediction Center issued this tornado watch at Aug 19, 2005, 4:05 PM EDT for 12 counties in New York; 4 counties in Pennsylvania. It was in force for 5 hr.
The area
The outline as issued.
The facts
- Issued
- Aug 19, 2005, 4:05 PM EDT (20:05 UTC)
- Expired
- Aug 19, 2005, 9:01 PM EDT
- In force
- 5 hr
- Issued by
- the Storm Prediction Center
Counties Allegany County, NY, Cattaraugus County, NY, Chautauqua County, NY, Erie County, NY, Genesee County, NY, Livingston County, NY, Monroe County, NY, Niagara County, NY, Ontario County, NY, Orleans County, NY, Wayne County, NY, Wyoming County, NY, Crawford County, PA, Erie County, PA, McKean County, PA, Warren County, PA
The radar
The Buffalo radar (KBUF), 19 km from the middle of the area, began a volume at 20:05 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
4 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 19, 5:12 PM EDT | Severe Thunderstorm Warning | CLE | Crawford, Erie | 67 min |
| Aug 19, 6:23 PM EDT | Severe Thunderstorm Warning | CLE | Crawford | 67 min |
| Aug 19, 6:43 PM EDT | Severe Thunderstorm Warning | CTP | Warren | 62 min |
| Aug 19, 7:06 PM EDT | Severe Thunderstorm Warning | BUF | Cattaraugus, Chautauqua | 54 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, 8.1 hours before the alert went out and 15 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
- 68 J/kg
- Mixed-layer CIN
- -71 J/kg
- Mixed-layer LCL
- 832 m above ground
- 0-6 km bulk shear
- 29 kt
- 0-1 km storm-relative helicity
- 60 m²/s²
- 0-3 km storm-relative helicity
- 145 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- -0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000
WWUS20 KWNS 192006
SEL5
SPC WW 192006
NYZ000-PAZ000-LEZ000-LOZ000-200200-
URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 735
NWS STORM PREDICTION CENTER NORMAN OK
405 PM EDT FRI AUG 19 2005
THE NWS STORM PREDICTION CENTER HAS ISSUED A
TORNADO WATCH FOR PORTIONS OF
WESTERN NEW YORK
NORTHWEST PENNSYLVANIA
LAKE ERIE
LAKE ONTARIO
EFFECTIVE THIS FRIDAY AFTERNOON AND EVENING FROM 405 PM UNTIL 1000
PM EDT.
TORNADOES...HAIL TO 1.5 INCHES IN DIAMETER...THUNDERSTORM WIND
GUSTS TO 70 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE
AREAS.
THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 65 STATUTE MILES
EAST AND WEST OF A LINE FROM 35 MILES NORTH OF ROCHESTER NEW YORK
TO 35 MILES SOUTH OF JAMESTOWN NEW YORK. FOR A COMPLETE DEPICTION
OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS
WOU5).
REMEMBER...A TORNADO WATCH MEANS CONDITIONS ARE FAVORABLE FOR
TORNADOES AND 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.
DISCUSSION...THUNDERSTORMS ARE BEGINNING TO DEVELOP SWD ALONG
PRE-FRONTAL BOUNDARY FROM SWRN ONTARIO INTO ERN LAKE ERIE IN
RESPONSE TO INCREASING DYNAMIC FORCING FOR ASCENT IN ADVANCE OF
UPPER SHORT WAVE MOVING ACROSS SWRN ONTARIO. AIRMASS HAS
DESTABILIZED ALONG THE SRN SHORE OF LAKE ONTARIO SSWWD INTO ERN OH
AND WRN PA...AND CONTINUING SOUTHERLY WINDS NEAR THE SURFACE VEER
MARKEDLY ABOVE THE BOUNDARY LAYER RESULTING IN STRONG VERTICAL SHEAR
SUPPORTIVE OF SEVERE STORMS INCLUDING POSSIBLE TORNADOES.
AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL
SURFACE AND ALOFT TO 1.5 INCHES. EXTREME TURBULENCE AND SURFACE
WIND GUSTS TO 60 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO
450. MEAN STORM MOTION VECTOR 26030.
...WEISS
433,0762 413,0775 413,0803 433,0785SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 19, 8:16 AM EDT | Mesoscale Discussion | SPC | Cattaraugus, Chautauqua, Erie, Niagara | 59 min |
| Aug 19, 2:32 PM EDT | Mesoscale Discussion | SPC | Allegany, Cattaraugus, Chautauqua, Erie, Genesee, Livingston and 4 more | 118 min |
| Aug 19, 7:12 PM EDT | Mesoscale Discussion | SPC | Allegany, Cattaraugus, Chautauqua, Erie, Genesee, Livingston and 6 more | 93 min |
Nearby
Tornado Watches in New York, 2005Tornado Watches in Pennsylvania, 2005Every tornado watch in 2005
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.