Alert archive / New York / Severe Thunderstorm Warnings in 2017

Severe Thunderstorm Warning 124, NWS Buffalo, NY

September 4, 20174 counties in New York

NWS Buffalo, NY issued this severe thunderstorm warning at Sep 4, 2017, 10:24 PM EDT for 4 counties in New York. It was in force for 32 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: Sep 4, 2017, 10:24 PM EDT (02:24 UTC)
Expired: Sep 4, 2017, 10:56 PM EDT
In force: 32 min
Issued by: NWS Buffalo, NY
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

Counties Erie County, NY, Genesee County, NY, Orleans County, NY, Wyoming County, NY

The radar

The Buffalo radar (KBUF), 27 km from the middle of the area, began a volume at 02:24 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, 10:36 PM EDT	TSTM WND DMG	1 Nnw East Pembroke, NY	WIRES DOWN ON BECKWITH RD.

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, 2.4 hours before the alert went out and 25 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.

219 
WUUS51 KBUF 050224
SVRBUF
NYC029-037-073-121-050315-
/O.NEW.KBUF.SV.W.0124.170905T0224Z-170905T0315Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Buffalo NY
1024 PM EDT MON SEP 4 2017

The National Weather Service in Buffalo has issued a

* Severe Thunderstorm Warning for...
  Northwestern Wyoming County in western New York...
  Northeastern Erie County in western New York...
  South central Orleans County in western New York...
  Genesee County in western New York...

* until 1115 PM EDT.

* At 1024 PM EDT, a severe thunderstorm was located over Clarence,
  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...
  Cheektowaga, West Seneca, Clarence, Batavia, Depew, Lancaster,
  Darien Lakes State Park and Elma.

This includes Interstate 90 between exits 49 and 48.
 
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 4303 7871 4310 7851 4308 7850 4309 7846
      4311 7846 4322 7814 4309 7802 4287 7807
      4284 7873
TIME...MOT...LOC 0224Z 256DEG 53KT 4295 7862 

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

HITCHCOCK

2 follow-up statements

790 
WWUS51 KBUF 050240
SVSBUF

Severe Weather Statement
National Weather Service Buffalo NY
1040 PM EDT MON SEP 4 2017

NYC029-050250-
/O.CAN.KBUF.SV.W.0124.000000T0000Z-170905T0315Z/
Erie NY-
1040 PM EDT MON SEP 4 2017

...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN ERIE COUNTY IS
CANCELLED...
    
The severe thunderstorm which prompted the warning has moved out of 
the warned area. Therefore, the warning has been cancelled.

LAT...LON 4322 7814 4309 7802 4287 7807 4285 7846
      4311 7846
TIME...MOT...LOC 0240Z 256DEG 50KT 4301 7828 

$$

NYC037-073-121-050315-
/O.CON.KBUF.SV.W.0124.000000T0000Z-170905T0315Z/
Wyoming NY-Orleans NY-Genesee NY-
1040 PM EDT MON SEP 4 2017

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1115 PM EDT
FOR NORTHWESTERN WYOMING...SOUTH CENTRAL ORLEANS AND GENESEE
COUNTIES...

At 1040 PM EDT, a severe thunderstorm was located near Oakfield, or
near Batavia, 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...
Batavia, Darien Lakes State Park, Pembroke, Attica, Byron, Oakfield,
Stafford and Alabama.

This includes Interstate 90 between exits 48A and 48.
 
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 4322 7814 4309 7802 4287 7807 4285 7846
      4311 7846
TIME...MOT...LOC 0240Z 256DEG 50KT 4301 7828 

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

HITCHCOCK

380 
WWUS51 KBUF 050256
SVSBUF

Severe Weather Statement
National Weather Service Buffalo NY
1056 PM EDT MON SEP 4 2017

NYC037-073-121-050306-
/O.CAN.KBUF.SV.W.0124.000000T0000Z-170905T0315Z/
Wyoming NY-Orleans NY-Genesee NY-
1056 PM EDT MON SEP 4 2017

...THE SEVERE THUNDERSTORM WARNING FOR NORTHWESTERN WYOMING...SOUTH
CENTRAL ORLEANS AND GENESEE COUNTIES IS CANCELLED...
                
The storm which prompted the warning has weakened below severe
limits, and no longer pose an immediate threat to life or property.
Therefore the warning has been cancelled.

LAT...LON 4322 7814 4309 7802 4287 7807 4285 7846
      4311 7846
TIME...MOT...LOC 0254Z 256DEG 53KT 4307 7797 

$$

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, 10:55 PM EDT	Beach Hazards Statement	BUF	Cayuga, Jefferson, Oswego	12 hr
Sep 4, 10:59 PM EDT	Severe Thunderstorm Warning	BUF	Cattaraugus, Chautauqua	61 min
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.