Alert archive / New York / Severe Thunderstorm Warnings in 2019

Severe Thunderstorm Warning 92, NWS Buffalo, NY

August 17, 2019Allegany County, New York

NWS Buffalo, NY issued this severe thunderstorm warning at Aug 17, 2019, 3:36 PM EDT for Allegany County, New York. It was in force for 54 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued
Aug 17, 2019, 3:36 PM EDT (19:36 UTC)
Expired
Aug 17, 2019, 4:30 PM EDT
In force
54 min
Issued by
NWS Buffalo, NY
Area
Storm-based polygon
Hail
1.0 in
Wind
60.0 mph

County Allegany County, NY

The radar

The Buffalo radar (KBUF), 114 km from the middle of the area, began a volume at 19:37 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.

The nearest sounding before it

Buffalo Intl Airport, NY (KBUF), launched 12:00Z, 7.6 hours before the alert went out and 111 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-pSkew-T log-p diagram, Buffalo Intl Airport, NY at 12:00Z on 2019-08-17Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 39 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Buffalo Intl Airport, NY at 12:00Z on 2019-08-17The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 74 square meters per square second.19395878Sfc1 km3 km6 km9 kmRMLM
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
39 J/kg
Mixed-layer CIN
-138 J/kg
Mixed-layer LCL
1233 m above ground
0-6 km bulk shear
35 kt
0-1 km storm-relative helicity
74 m²/s²
0-3 km storm-relative helicity
126 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

647 
WUUS51 KBUF 171936
SVRBUF
NYC003-172030-
/O.NEW.KBUF.SV.W.0092.190817T1936Z-190817T2030Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Buffalo NY
336 PM EDT Sat Aug 17 2019

The National Weather Service in Buffalo has issued a

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

* Until 430 PM EDT..

* At 335 PM EDT, a severe thunderstorm was located near Wellsville,
  moving northeast at 20 mph.

  HAZARD...60 mph wind gusts and quarter size hail.

  SOURCE...Radar indicated.

  IMPACT...Minor damage to vehicles is possible. Expect wind damage 
           to roofs, siding, and trees.

* Locations impacted include...
  Wellsville, Alfred, Whitesville, Bolivar, Andover, Alma, Stannards,
  Paynesville and Knight Creek.

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 4207 7816 4229 7774 4200 7775 4200 7811
TIME...MOT...LOC 1935Z 239DEG 18KT 4205 7804 

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

Hitchcock
2 follow-up statements
602 
WWUS51 KBUF 171959
SVSBUF

Severe Weather Statement
National Weather Service Buffalo NY
359 PM EDT Sat Aug 17 2019

NYC003-172030-
/O.CON.KBUF.SV.W.0092.000000T0000Z-190817T2030Z/
Allegany NY-
359 PM EDT Sat Aug 17 2019

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 430 PM EDT
FOR SOUTHEASTERN ALLEGANY COUNTY...

At 359 PM EDT, a severe thunderstorm was located near Genesee, or
near Wellsville, moving east at 25 mph.

HAZARD...60 mph wind gusts and quarter size hail.

SOURCE...Radar indicated.

IMPACT...Minor damage to vehicles is possible. Expect wind damage to 
         roofs, siding, and trees.

Locations impacted include...
Wellsville, Alfred, Whitesville, Andover, Alma, Stannards,
Paynesville and Knight Creek.

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 4229 7774 4200 7775 4200 7809 4212 7807
TIME...MOT...LOC 1959Z 259DEG 21KT 4205 7786 

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

Hitchcock
907 
WWUS51 KBUF 172033
SVSBUF

Severe Weather Statement
National Weather Service Buffalo NY
433 PM EDT Sat Aug 17 2019

NYC003-172042-
/O.EXP.KBUF.SV.W.0092.000000T0000Z-190817T2030Z/
Allegany NY-
433 PM EDT Sat Aug 17 2019

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN ALLEGANY COUNTY
HAS EXPIRED...
        
The storm which prompted the warning has moved out of the area.
Therefore, the warning has been allowed to expire.

LAT...LON 4229 7774 4200 7775 4200 7809 4212 7807
TIME...MOT...LOC 2032Z 239DEG 18KT 4213 7769 

$$

Hitchcock

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 17, 10:14 AM EDTSpecial Marine WarningBUF61 min
Aug 17, 10:16 AM EDTSpecial Weather StatementBUFGenesee44 min
Aug 17, 10:40 AM EDTSpecial Weather StatementBUFChautauqua35 min
Aug 17, 11:04 AM EDTSpecial Weather StatementBUFMonroe56 min
Aug 17, 11:07 AM EDTSpecial Weather StatementBUFCattaraugus, Chautauqua, Erie, Wyoming53 min
Aug 17, 11:58 AM EDTSpecial Weather StatementBUFLivingston, Ontario, Wyoming47 min
Aug 17, 12:37 PM EDTSevere Thunderstorm WarningBUFLivingston, Ontario38 min
Aug 17, 1:16 PM EDTSpecial Weather StatementBUFOntario44 min
Aug 17, 1:31 PM EDTSevere Thunderstorm WarningBUFCayuga, Oswego, Wayne40 min
Aug 17, 1:48 PM EDTSpecial Weather StatementBUFWyoming57 min
Aug 17, 2:04 PM EDTSpecial Weather StatementBUFCattaraugus56 min
Aug 17, 2:18 PM EDTSpecial Weather StatementBUFLivingston27 min
Aug 17, 2:22 PM EDTSevere Thunderstorm WarningBUFOswego38 min
Aug 17, 2:48 PM EDTSpecial Weather StatementBUFLivingston42 min
Aug 17, 2:58 PM EDTSpecial Weather StatementBUFCattaraugus47 min
Aug 17, 3:27 PM EDTSpecial Weather StatementBUFAllegany33 min
Aug 17, 4:06 PM EDTSpecial Marine WarningBUF39 min
Aug 17, 4:19 PM EDTSevere Thunderstorm WarningBUFNiagara, Orleans41 min

Nearby

Severe Thunderstorm Warnings in New York, 2019Every severe thunderstorm warning in 2019

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.