Alert archive / New York / Severe Thunderstorm Warnings in 2009
Severe Thunderstorm Warning 89, NWS Buffalo, NY
NWS Buffalo, NY issued this severe thunderstorm warning at Aug 20, 2009, 9:52 PM EDT for Allegany County, Cattaraugus County, New York. It was in force for 53 min. 1 report came from inside the area while it was in force.
The area
The outline as issued, with what was reported inside it.
The facts
- Issued
- Aug 20, 2009, 9:52 PM EDT (01:52 UTC)
- Expired
- Aug 20, 2009, 10:45 PM EDT
- In force
- 53 min
- Issued by
- NWS Buffalo, NY
- Area
- Storm-based polygon
Counties Allegany County, NY, Cattaraugus County, NY
The radar
The Buffalo radar (KBUF), 74 km from the middle of the area, began a volume at 01:54 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.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Aug 20, 10:20 PM EDT | TSTM WND DMG | Cuba, NY | TREE DOWN IN CUBA |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Aug 20, 6:54 PM EDT | Severe Thunderstorm Watch | SPC | 5 hr |
The nearest sounding before it
Buffalo Intl Airport, NY (KBUF), launched 00:00Z, 1.9 hours before the alert went out and 71 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
- 828 J/kg
- Mixed-layer CIN
- -14 J/kg
- Mixed-layer LCL
- 1273 m above ground
- 0-6 km bulk shear
- 42 kt
- 0-1 km storm-relative helicity
- 232 m²/s²
- 0-3 km storm-relative helicity
- 306 m²/s²
- Significant tornado parameter
- 0.8
- Supercell composite
- 6.5
The text
As transmitted, in the capitals the NWS used until 2016.
000
WUUS51 KBUF 210152
SVRBUF
NYC003-009-210245-
/O.NEW.KBUF.SV.W.0089.090821T0152Z-090821T0245Z/
BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE BUFFALO NY
952 PM EDT THU AUG 20 2009
THE NATIONAL WEATHER SERVICE IN BUFFALO HAS ISSUED A
* SEVERE THUNDERSTORM WARNING FOR...
NORTHERN ALLEGANY COUNTY IN WESTERN NEW YORK
EASTERN CATTARAUGUS COUNTY IN WESTERN NEW YORK
* UNTIL 1045 PM EDT
* AT 951 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING DAMAGING WINDS IN EXCESS
OF 60 MPH. THIS STORM WAS LOCATED 5 MILES SOUTH OF ASHFORD...OR 9
MILES NORTHEAST OF SALAMANCA...AND MOVING NORTHEAST AT 40 MPH.
* THE SEVERE THUNDERSTORM WILL BE NEAR...
FRANKLINVILLE BY 1005 PM EDT...
RUSHFORD BY 1020 PM EDT...
HOUGHTON BY 1030 PM EDT...
A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 200 AM EDT FRIDAY
MORNING FOR WESTERN NEW YORK.
LAT...LON 4234 7867 4253 7831 4252 7791 4233 7773
4211 7857
TIME...MOT...LOC 0152Z 237DEG 36KT 4225 7858
$$
ZAFF2 follow-up statements
000 WWUS51 KBUF 210229 SVSBUF SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE BUFFALO NY 1029 PM EDT THU AUG 20 2009 NYC009-210238- /O.CAN.KBUF.SV.W.0089.000000T0000Z-090821T0245Z/ CATTARAUGUS NY- 1029 PM EDT THU AUG 20 2009 ...THE SEVERE THUNDERSTORM WARNING FOR EASTERN CATTARAUGUS COUNTY IS CANCELLED... THE SEVERE THUNDERSTORM HAS MOVED EAST OF CATTAURAUGUS COUNTY... THEREFORE THE SEVERE THUNDERSTORM WARNING HAS BEEN CANCELLED. A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL MIDNIGHT EDT TONIGHT FOR WESTERN NEW YORK. LAT...LON 4221 7822 4253 7829 4252 7791 4233 7773 TIME...MOT...LOC 0228Z 237DEG 36KT 4244 7817 $$ NYC003-210245- /O.CON.KBUF.SV.W.0089.000000T0000Z-090821T0245Z/ ALLEGANY NY- 1029 PM EDT THU AUG 20 2009 ...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1045 PM EDT FOR NORTHERN ALLEGANY COUNTY... AT 1028 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING DAMAGING WINDS IN EXCESS OF 60 MPH. THIS STORM WAS LOCATED NEAR HOUGHTON...MOVING NORTHEAST AT 40 MPH. THE SEVERE THUNDERSTORM WILL BE NEAR... FILLMORE BY 1035 PM EDT... PRECAUTIONARY/PREPAREDNESS ACTIONS... IN ADDITION TO LARGE HAIL AND DAMAGING WINDS...CONTINUOUS CLOUD TO GROUND LIGHTNING IS OCCURRING WITH THIS STORM. MOVE INDOORS IMMEDIATELY LIGHTNING IS ONE OF NATURES NUMBER ONE KILLERS. REMEMBER...IF YOU CAN HEAR THUNDER...YOU ARE CLOSE ENOUGH TO BE STRUCK BY LIGHTNING. A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL MIDNIGHT EDT TONIGHT FOR WESTERN NEW YORK. && LAT...LON 4221 7822 4253 7829 4252 7791 4233 7773 TIME...MOT...LOC 0228Z 237DEG 36KT 4244 7817 $$ HITCHCOCK
000 WWUS51 KBUF 210245 SVSBUF SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE BUFFALO NY 1045 PM EDT THU AUG 20 2009 NYC003-210254- /O.EXP.KBUF.SV.W.0089.000000T0000Z-090821T0245Z/ ALLEGANY NY- 1045 PM EDT THU AUG 20 2009 ...THE SEVERE THUNDERSTORM WARNING FOR NORTHERN ALLEGANY COUNTY WILL EXPIRE AT 1045 PM EDT... AT 1044 PM EDT NATIONAL WEATHER SERVICE RADAR SHOWED THAT THE SEVERE THUNDERSTORM THAT PROMPTED THE WARNING HAD WEAKENED AND WAS NO LONGER SEVERE...THUS THE WARNING HAS BEEN ALLOWED TO EXPIRE. A SEVERE THUNDERSTORM WATCH ALSO REMAINS IN EFFECT UNTIL MIDNIGHT EDT TONIGHT FOR WESTERN NEW YORK. LAT...LON 4221 7822 4253 7829 4252 7791 4233 7773 TIME...MOT...LOC 0244Z 237DEG 36KT 4253 7798 $$ HITCHCOCK
The office that day
Everything else NWS Buffalo, NY issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 20, 8:31 PM EDT | Special Marine Warning | BUF | 44 min | |
| Aug 20, 8:31 PM EDT | Severe Thunderstorm Warning | BUF | Orleans | 59 min |
| Aug 20, 8:52 PM EDT | Areal Flood Advisory | BUF | Allegany, Cattaraugus, Chautauqua, Erie, Genesee, Niagara and 2 more | 3 hr |
| Aug 20, 8:59 PM EDT | Severe Thunderstorm Warning | BUF | Cattaraugus, Chautauqua | 61 min |
| Aug 20, 9:16 PM EDT | Special Marine Warning | BUF | 89 min | |
| Aug 20, 10:04 PM EDT | Severe Thunderstorm Warning | BUF | Genesee, Monroe, Orleans | 56 min |
| Aug 20, 10:06 PM EDT | Severe Thunderstorm Warning | BUF | Allegany | 54 min |
| Aug 20, 10:19 PM EDT | Special Marine Warning | BUF | 86 min | |
| Aug 20, 10:25 PM EDT | Tornado Warning | BUF | Allegany | 35 min |
| Aug 20, 11:28 PM EDT | Special Marine Warning | BUF | 92 min |
Nearby
Severe Thunderstorm Warnings in New York, 2009Every severe thunderstorm warning in 2009
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.