Alert archive / New York / Severe Thunderstorm Warnings in 2017

Severe Thunderstorm Warning 71, NWS Buffalo, NY

July 8, 2017Allegany County, Cattaraugus County, New York

NWS Buffalo, NY issued this severe thunderstorm warning at Jul 8, 2017, 7:58 AM EDT for Allegany County, Cattaraugus County, New York. It was in force for 47 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: Jul 8, 2017, 7:58 AM EDT (11:58 UTC)
Expired: Jul 8, 2017, 8:45 AM EDT
In force: 47 min
Issued by: NWS Buffalo, NY
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Allegany County, NY, Cattaraugus County, NY

The radar

The Buffalo radar (KBUF), 109 km from the middle of the area, began a volume at 11:58 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
Jul 8, 8:12 AM EDT	TSTM WND DMG	Little Genesee, NY	TREE AND WIRE 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, 12.0 hours before the alert went out and 106 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: 490 J/kg
Mixed-layer CIN: -49 J/kg
Mixed-layer LCL: 996 m above ground
0-6 km bulk shear: 20 kt
0-1 km storm-relative helicity: 38 m²/s²
0-3 km storm-relative helicity: 60 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

833 
WUUS51 KBUF 081158
SVRBUF
NYC003-009-081245-
/O.NEW.KBUF.SV.W.0071.170708T1158Z-170708T1245Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Buffalo NY
758 AM EDT SAT JUL 8 2017

The National Weather Service in Buffalo has issued a

* Severe Thunderstorm Warning for...
  Southeastern Cattaraugus County in western New York...
  Southern Allegany County in western New York...

* Until 845 AM EDT.

* At 758 AM EDT, a severe thunderstorm was located near Weston Mills,
  or 7 miles east of Olean, moving east 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...
  Wellsville, Whitesville, Weston Mills, Scio, Bolivar, Andover,
  Portville and Alma.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4200 7840 4217 7838 4221 7774 4200 7775
TIME...MOT...LOC 1158Z 273DEG 36KT 4206 7828 

HAIL...1.00IN
WIND...60MPH
 
$$

Church

2 follow-up statements

436 
WWUS51 KBUF 081220
SVSBUF

Severe Weather Statement
National Weather Service Buffalo NY
820 AM EDT SAT JUL 8 2017

NYC009-081230-
/O.CAN.KBUF.SV.W.0071.000000T0000Z-170708T1245Z/
Cattaraugus NY-
820 AM EDT SAT JUL 8 2017

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN CATTARAUGUS
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 4200 7821 4213 7816 4217 7774 4200 7775
TIME...MOT...LOC 1220Z 273DEG 36KT 4205 7799 

$$

NYC003-081245-
/O.CON.KBUF.SV.W.0071.000000T0000Z-170708T1245Z/
Allegany NY-
820 AM EDT SAT JUL 8 2017

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 845 AM EDT
FOR SOUTHEASTERN ALLEGANY COUNTY...

At 820 AM EDT, a severe thunderstorm was located near Wellsville,
moving east at 40 mph.

HAZARD...60 mph wind gusts. 

SOURCE...Radar indicated. 

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

Locations impacted include...
Wellsville, Whitesville, Bolivar, Andover, Alma, Richburg, Stannards
and Paynesville.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4200 7821 4213 7816 4217 7774 4200 7775
TIME...MOT...LOC 1220Z 273DEG 36KT 4205 7799 

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

Church

343 
WWUS51 KBUF 081243
SVSBUF

Severe Weather Statement
National Weather Service Buffalo NY
843 AM EDT SAT JUL 8 2017

NYC003-081253-
/O.EXP.KBUF.SV.W.0071.000000T0000Z-170708T1245Z/
Allegany NY-
843 AM EDT SAT JUL 8 2017

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN ALLEGANY COUNTY
WILL EXPIRE AT 845 AM EDT...
        
The storm which prompted the warning has weakened below severe
limits, and has exited the warned area. Therefore the warning will be
allowed to expire.

LAT...LON 4200 7821 4213 7816 4217 7774 4200 7775
TIME...MOT...LOC 1243Z 273DEG 36KT 4204 7769 

$$

Church

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 7, 9:51 PM EDT	Special Marine Warning	BUF		54 min
Jul 8, 1:49 AM EDT	Severe Thunderstorm Warning	BUF	Erie, Genesee, Wyoming	41 min
Jul 8, 2:28 AM EDT	Special Weather Statement	BUF	Monroe	47 min
Jul 8, 3:33 AM EDT	Special Weather Statement	BUF	Jefferson	27 min
Jul 8, 3:42 AM EDT	Special Marine Warning	BUF		63 min
Jul 8, 4:11 AM EDT	Special Weather Statement	BUF	Oswego	49 min
Jul 8, 4:42 AM EDT	Severe Thunderstorm Warning	BUF	Lewis, Oswego	49 min
Jul 8, 4:51 AM EDT	Beach Hazards Statement	BUF	Cayuga, Oswego, Wayne	18 hr
Jul 8, 4:51 AM EDT	Lakeshore Flood Warning	BUF	Cayuga, Jefferson, Oswego, Wayne	36 hr
Jul 8, 4:53 AM EDT	Small Craft Advisory	BUF		39 hr
Jul 8, 5:37 AM EDT	Special Weather Statement	BUF	St. Lawrence	23 min
Jul 8, 7:47 AM EDT	Special Weather Statement	BUF	Allegany	58 min
Jul 8, 8:41 AM EDT	Special Weather Statement	BUF	Livingston	49 min
Jul 8, 2:51 PM EDT	Special Marine Warning	BUF		84 min
Jul 8, 3:12 PM EDT	Special Weather Statement	BUF	Jefferson	48 min
Jul 8, 3:59 PM EDT	Special Weather Statement	BUF	Jefferson	46 min
Jul 8, 4:43 PM EDT	Special Weather Statement	BUF	Lewis	32 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.