Alert archive / New York / Severe Thunderstorm Warnings in 2017

Severe Thunderstorm Warning 125, NWS Buffalo, NY

September 4, 2017Cattaraugus County, Chautauqua County, New York

NWS Buffalo, NY issued this severe thunderstorm warning at Sep 4, 2017, 10:59 PM EDT for Cattaraugus County, Chautauqua County, New York. It was in force for 61 min. 9 reports 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: Sep 4, 2017, 10:59 PM EDT (02:59 UTC)
Expired: Sep 5, 2017, 12:00 AM EDT
In force: 61 min
Issued by: NWS Buffalo, NY
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

Counties Cattaraugus County, NY, Chautauqua County, NY

The radar

The Buffalo radar (KBUF), 106 km from the middle of the area, began a volume at 02:58 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
Sep 4, 11:15 PM EDT	TSTM WND DMG	Lakewood, NY	TREES DOWN
Sep 4, 11:17 PM EDT	TSTM WND DMG	Celoron, NY	TREES DOWN
Sep 4, 11:18 PM EDT	TSTM WND DMG	Celoron, NY	TREE ON HOUSE ON DUQUESNE ST.
Sep 4, 11:18 PM EDT	TSTM WND DMG	Jamestown, NY	MULTIPLE REPORTS OF TREES/WIRES DOWN AROUND THE CITY
Sep 4, 11:19 PM EDT	TSTM WND DMG	1 Nne Jamestown, NY	TREES AND WIRES DOWN ON CLYDE AVENUE. ROAD REMAINS CLOSED AS OF 0740 AM THIS MORNING.
Sep 4, 11:19 PM EDT	TSTM WND DMG	1 Wnw Jamestown, NY	TREE DOWN ON CAR ON JEFFERSON ST.
Sep 4, 11:20 PM EDT	TSTM WND DMG	1 E Falconer, NY	TREE DOWN ACROSS ELMWOOD AVE.
Sep 4, 11:22 PM EDT	TSTM WND DMG	1 W Onoville, NY	TREES DOWN ACROSS SAWMILL RUN ROAD
Sep 4, 11:41 PM EDT	TSTM WND DMG	Busti, NY	TREES DOWN

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Buffalo Intl Airport, NY (KBUF), launched 00:00Z, 3.0 hours before the alert went out and 105 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: 94 J/kg
Mixed-layer CIN: -227 J/kg
Mixed-layer LCL: 1561 m above ground
0-6 km bulk shear: 44 kt
0-1 km storm-relative helicity: 339 m²/s²
0-3 km storm-relative helicity: 515 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.4

Open this sounding in Storm Lab

The text

As transmitted.

670 
WUUS51 KBUF 050259
SVRBUF
NYC009-013-050400-
/O.NEW.KBUF.SV.W.0125.170905T0259Z-170905T0400Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Buffalo NY
1059 PM EDT MON SEP 4 2017

The National Weather Service in Buffalo has issued a

* Severe Thunderstorm Warning for...
  Southwestern Cattaraugus County in western New York...
  Southern Chautauqua County in western New York...

* until midnight EDT.

* At 1059 PM EDT, a severe thunderstorm was located near Findley
  Lake, or 21 miles west of Jamestown, moving east at 60 mph.

  HAZARD...60 mph wind gusts. 

  SOURCE...Radar indicated. 

  IMPACT...Expect wind damage to trees and power lines. 

* Locations impacted include...
  Jamestown, Allegany State Park, Lakewood, Falconer, Mayville,
  Clymer, Long Point State Park and Jamestown West.

This includes Interstate 86 between exits 4 and 17.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

Large hail and damaging winds and continuous cloud to ground
lightning is occurring with this storm. Move indoors immediately.
Lightning is one of nature's leading killers. Remember, if you can
hear thunder, you are close enough to be struck by lightning.

&&

LAT...LON 4219 7976 4234 7896 4200 7886 4200 7976
TIME...MOT...LOC 0259Z 255DEG 52KT 4210 7965 

HAIL...<.75IN
WIND...60MPH
 
$$

HITCHCOCK

2 follow-up statements

948 
WWUS51 KBUF 050321
SVSBUF

Severe Weather Statement
National Weather Service Buffalo NY
1121 PM EDT MON SEP 4 2017

NYC009-013-050400-
/O.CON.KBUF.SV.W.0125.000000T0000Z-170905T0400Z/
Cattaraugus NY-Chautauqua NY-
1121 PM EDT MON SEP 4 2017

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL MIDNIGHT EDT
FOR SOUTHWESTERN CATTARAUGUS AND SOUTHERN CHAUTAUQUA COUNTIES...

At 1121 PM EDT, a severe thunderstorm was located over Jamestown
West, or near Jamestown, moving east at 55 mph.

HAZARD...60 mph wind gusts. 

SOURCE...Radar indicated. 

IMPACT...Expect wind damage to trees and power lines. 

Locations impacted include...
Jamestown, Allegany State Park, Lakewood, Falconer, Clymer, Long
Point State Park, Jamestown West and Frewsburg.

This includes Interstate 86 between exits 7 and 17.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

Continuous cloud to ground lightning is occurring with this storm.
Move indoors immediately. Lightning is one of nature's leading
killers. Remember, if you can hear thunder, you are close enough to
be struck by lightning.

&&

LAT...LON 4219 7939 4234 7896 4200 7886 4200 7976
      4209 7976
TIME...MOT...LOC 0321Z 262DEG 48KT 4212 7929 

HAIL...<.75IN
WIND...60MPH
 
$$

HITCHCOCK

057 
WWUS51 KBUF 050400
SVSBUF

Severe Weather Statement
National Weather Service Buffalo NY
1200 AM EDT TUE SEP 5 2017

NYC009-013-050410-
/O.EXP.KBUF.SV.W.0125.000000T0000Z-170905T0400Z/
Cattaraugus NY-Chautauqua NY-
1200 AM EDT TUE SEP 5 2017

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHWESTERN CATTARAUGUS AND
SOUTHERN CHAUTAUQUA COUNTIES HAS EXPIRED...
        
The storm which prompted the warning has moved out of the area.
Therefore the warning has been allowed to expire.

LAT...LON 4219 7939 4234 7896 4200 7886 4200 7976
      4209 7976
TIME...MOT...LOC 0400Z 255DEG 52KT 4226 7856 

$$

HITCHCOCK

The office that day

Everything else NWS Buffalo, NY issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Sep 4, 9:47 PM EDT	Special Marine Warning	BUF		88 min
Sep 4, 10:12 PM EDT	Severe Thunderstorm Warning	BUF	Cattaraugus, Chautauqua, Erie	63 min
Sep 4, 10:20 PM EDT	Special Weather Statement	BUF	Erie, Genesee, Wyoming	40 min
Sep 4, 10:24 PM EDT	Severe Thunderstorm Warning	BUF	Erie, Genesee, Orleans, Wyoming	32 min
Sep 4, 10:55 PM EDT	Beach Hazards Statement	BUF	Cayuga, Jefferson, Oswego	12 hr
Sep 4, 11:06 PM EDT	Severe Thunderstorm Warning	BUF	Monroe, Wayne	39 min
Sep 4, 11:08 PM EDT	Special Marine Warning	BUF		52 min
Sep 4, 11:24 PM EDT	Special Marine Warning	BUF		66 min
Sep 4, 11:33 PM EDT	Severe Thunderstorm Warning	BUF	Allegany, Cattaraugus	57 min
Sep 4, 11:51 PM EDT	Special Marine Warning	BUF		39 min
Sep 4, 11:57 PM EDT	Severe Thunderstorm Warning	BUF	Cayuga, Oswego, Wayne	63 min
Sep 5, 12:07 AM EDT	Flash Flood Warning	BUF	Cattaraugus, Chautauqua	3 hr
Sep 5, 12:18 AM EDT	Severe Thunderstorm Warning	BUF	Allegany, Livingston	30 min
Sep 5, 12:24 AM EDT	Severe Thunderstorm Warning	BUF	Ontario, Wayne	21 min
Sep 5, 10:19 AM EDT	Special Marine Warning	BUF		41 min
Sep 5, 10:23 AM EDT	Special Weather Statement	BUF	Allegany	37 min
Sep 5, 10:38 AM EDT	Special Weather Statement	BUF	Allegany	37 min
Sep 5, 5:46 PM EDT	Special Marine Warning	BUF		59 min

Nearby

Severe Thunderstorm Warnings in New York, 2017 Every 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.