Alert archive / New York / Severe Thunderstorm Warnings in 2017
Severe Thunderstorm Warning 98, NWS Buffalo, NY
NWS Buffalo, NY issued this severe thunderstorm warning at Aug 4, 2017, 5:23 PM EDT for Allegany County, Livingston County, New York. It was in force for 67 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 4, 2017, 5:23 PM EDT (21:23 UTC)
- Expired
- Aug 4, 2017, 6:30 PM EDT
- In force
- 67 min
- Issued by
- NWS Buffalo, NY
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 60.0 mph
Counties Allegany County, NY, Livingston County, NY
The radar
The Buffalo radar (KBUF), 95 km from the middle of the area, began a volume at 21:26 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 4, 5:48 PM EDT | TSTM WND DMG | 3 Nne Angelica, NY | MULTIPLE REPORTS OF TREES AND WIRES DOWN |
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 4, 1:25 PM EDT | Severe Thunderstorm Watch | SPC | 8 hr |
The nearest sounding before it
Buffalo Intl Airport, NY (KBUF), launched 12:00Z, 9.4 hours before the alert went out and 91 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
- 243 J/kg
- Mixed-layer CIN
- -61 J/kg
- Mixed-layer LCL
- 895 m above ground
- 0-6 km bulk shear
- 35 kt
- 0-1 km storm-relative helicity
- 179 m²/s²
- 0-3 km storm-relative helicity
- 190 m²/s²
- Significant tornado parameter
- 0.1
- Supercell composite
- 1.0
The text
As transmitted.
101
WUUS51 KBUF 042123
SVRBUF
NYC003-051-042230-
/O.NEW.KBUF.SV.W.0098.170804T2123Z-170804T2230Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Buffalo NY
523 PM EDT FRI AUG 4 2017
The National Weather Service in Buffalo has issued a
* Severe Thunderstorm Warning for...
Southern Livingston County in western New York...
Northeastern Allegany County in western New York...
* Until 630 PM EDT.
* At 523 PM EDT, a severe thunderstorm was located 8 miles east of
Belfast, or 14 miles west of Hornell, moving northeast at 40 mph.
HAZARD...60 mph wind gusts and quarter size hail.
SOURCE...Radar indicated.
IMPACT...Minor damage to vehicles is possible. Expect wind damage
to trees and power lines.
* Locations impacted include...
Geneseo, Dansville, Letchworth State Park, Mount Morris, Conesus,
Groveland, Springwater and Nunda.
This includes the following highways...
Interstate 390 between exits 4 and 7.
Interstate 86 near exit 32.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 4236 7806 4282 7790 4270 7760 4267 7760
4267 7752 4266 7749 4263 7749 4258 7755
4258 7766 4253 7766 4253 7772 4241 7772
4228 7786
TIME...MOT...LOC 2123Z 205DEG 37KT 4236 7794
HAIL...1.00IN
WIND...60MPH
$$
Zaff2 follow-up statements
940
WWUS51 KBUF 042152
SVSBUF
Severe Weather Statement
National Weather Service Buffalo NY
552 PM EDT FRI AUG 4 2017
NYC003-051-042230-
/O.CON.KBUF.SV.W.0098.000000T0000Z-170804T2230Z/
Livingston NY-Allegany NY-
552 PM EDT FRI AUG 4 2017
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 630 PM EDT
FOR SOUTHERN LIVINGSTON AND NORTHEASTERN ALLEGANY COUNTIES...
At 551 PM EDT, severe thunderstorms were located along a line
extending from 7 miles southeast of Belfast to near Portageville,
moving northeast at 35 mph.
HAZARD...60 mph wind gusts and quarter size hail.
SOURCE...Radar indicated.
IMPACT...Minor damage to vehicles is possible. Expect wind damage to
trees and power lines.
Locations impacted include...
Geneseo, Dansville, Letchworth State Park, Mount Morris, Conesus,
Groveland, Springwater and Nunda.
This includes the following highways...
Interstate 390 between exits 4 and 7.
Interstate 86 near exit 32.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 4236 7806 4282 7790 4270 7760 4267 7760
4267 7752 4266 7749 4263 7749 4258 7755
4258 7766 4253 7766 4253 7772 4241 7772
4228 7786
TIME...MOT...LOC 2151Z 233DEG 31KT 4229 7797 4250 7798
HAIL...1.00IN
WIND...60MPH
$$
Zaff427
WWUS51 KBUF 042226
SVSBUF
Severe Weather Statement
National Weather Service Buffalo NY
626 PM EDT FRI AUG 4 2017
NYC003-051-042235-
/O.EXP.KBUF.SV.W.0098.000000T0000Z-170804T2230Z/
Livingston NY-Allegany NY-
626 PM EDT FRI AUG 4 2017
...THE SEVERE THUNDERSTORM WARNING FOR SOUTHERN LIVINGSTON AND
NORTHEASTERN ALLEGANY COUNTIES WILL EXPIRE AT 630 PM EDT...
The storms which prompted the warning have weakened below severe
limits, and have exited the warned area. Therefore the warning will
be allowed to expire.
A severe thunderstorm watch remains in effect until 900 PM EDT for
western New York.
LAT...LON 4236 7806 4282 7790 4270 7760 4267 7760
4267 7752 4266 7749 4263 7749 4258 7755
4258 7766 4253 7766 4253 7772 4241 7772
4228 7786
TIME...MOT...LOC 2225Z 205DEG 37KT 4260 7777 4281 7778
$$
ZaffThe office that day
Everything else NWS Buffalo, NY issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 3, 9:28 PM EDT | Small Craft Advisory | BUF | 54 hr | |
| Aug 4, 8:45 AM EDT | Special Weather Statement | BUF | Wayne | 30 min |
| Aug 4, 8:52 AM EDT | Special Marine Warning | BUF | 53 min | |
| Aug 4, 11:40 AM EDT | Special Marine Warning | BUF | 65 min | |
| Aug 4, 11:53 AM EDT | Special Weather Statement | BUF | Wayne | 37 min |
| Aug 4, 12:22 PM EDT | Special Marine Warning | BUF | 53 min | |
| Aug 4, 12:27 PM EDT | Severe Thunderstorm Warning | BUF | Erie | 63 min |
| Aug 4, 12:55 PM EDT | Severe Thunderstorm Warning | BUF | Cattaraugus, Chautauqua, Erie | 50 min |
| Aug 4, 1:05 PM EDT | Severe Thunderstorm Warning | BUF | Genesee | 31 min |
| Aug 4, 1:08 PM EDT | Special Marine Warning | BUF | 52 min | |
| Aug 4, 1:13 PM EDT | Severe Thunderstorm Warning | BUF | Niagara, Orleans | 62 min |
| Aug 4, 1:41 PM EDT | Severe Thunderstorm Warning | BUF | Erie, Genesee, Wyoming | 49 min |
| Aug 4, 1:59 PM EDT | Special Marine Warning | BUF | 61 min | |
| Aug 4, 3:00 PM EDT | Severe Thunderstorm Warning | BUF | Jefferson, Lewis, Oswego | 45 min |
| Aug 4, 3:22 PM EDT | Special Marine Warning | BUF | 53 min | |
| Aug 4, 3:38 PM EDT | Severe Thunderstorm Warning | BUF | Jefferson | 57 min |
| Aug 4, 3:42 PM EDT | Special Marine Warning | BUF | 63 min | |
| Aug 4, 4:02 PM EDT | Special Marine Warning | BUF | 118 min | |
| Aug 4, 4:14 PM EDT | Special Marine Warning | BUF | 61 min | |
| Aug 4, 4:17 PM EDT | Special Marine Warning | BUF | 88 min | |
| Aug 4, 4:26 PM EDT | Special Marine Warning | BUF | 34 min | |
| Aug 4, 4:27 PM EDT | Severe Thunderstorm Warning | BUF | Jefferson, Oswego | 33 min |
| Aug 4, 4:45 PM EDT | Special Marine Warning | BUF | 2 hr | |
| Aug 4, 4:46 PM EDT | Special Marine Warning | BUF | 89 min | |
| Aug 4, 5:00 PM EDT | Severe Thunderstorm Warning | BUF | Erie, Genesee, Niagara | 45 min |
| Aug 4, 5:04 PM EDT | Severe Thunderstorm Warning | BUF | Cayuga, Oswego | 41 min |
| Aug 4, 5:39 PM EDT | Special Marine Warning | BUF | 36 min | |
| Aug 4, 5:51 PM EDT | Severe Thunderstorm Warning | BUF | Jefferson, Lewis, Oswego | 54 min |
| Aug 4, 6:38 PM EDT | Severe Thunderstorm Warning | BUF | Jefferson, Lewis | 52 min |
| Aug 4, 7:09 PM EDT | Severe Thunderstorm Warning | BUF | Jefferson, Lewis, Oswego | 66 min |
| Aug 4, 7:15 PM EDT | Severe Thunderstorm Warning | BUF | Cayuga, Ontario, Oswego, Wayne | 60 min |
Nearby
Severe Thunderstorm Warnings in New York, 2017Every severe thunderstorm warning in 2017
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.