Alert archive / New York / Severe Thunderstorm Warnings in 2017

Severe Thunderstorm Warning 7, NWS Buffalo, NY

May 1, 20175 counties in New York

NWS Buffalo, NY issued this severe thunderstorm warning at May 1, 2017, 3:47 PM EDT for 5 counties in New York. It was in force for 58 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
May 1, 2017, 3:47 PM EDT (19:47 UTC)
Expired
May 1, 2017, 4:45 PM EDT
In force
58 min
Issued by
NWS Buffalo, NY
Area
Storm-based polygon
Hail
0.75 in
Wind
70.0 mph

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

The radar

The Buffalo radar (KBUF), 34 km from the middle of the area, began a volume at 19:47 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

TimeReportWhereRemark
May 1, 3:57 PM EDTTSTM WND DMGMedina, NYTREES AND WIRES DOWN.
May 1, 4:05 PM EDTTSTM WND DMG1 Nw Alabama, NYPOWERLINES DOWN ON LEVITA ROAD.
May 1, 4:05 PM EDTTSTM WND DMG1 Nw Alabama, NYTREES DOWN ON ROSEVILLE ROAD.
May 1, 4:05 PM EDTTSTM WND DMGAlexander, NYTREES DOWN BEAVER ROAD.
May 1, 4:12 PM EDTTSTM WND DMGAlbion, NYTREES AND WIRES DOWN.
May 1, 4:23 PM EDTTSTM WND DMGArcade, NYTREE DOWN
May 1, 4:25 PM EDTTSTM WND DMG2 Nw Oakfield, NYSTRAIGHT LINE WIND DAMAGE...NUMEROUS TREES DOWN NEAR EAST SHELBY ROAD.
May 1, 4:26 PM EDTTSTM WND DMGPavilion, NYTREE DOWN ON LINWOOD ROAD.
May 1, 4:30 PM EDTTSTM WND DMGPike, NYTREE 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.

IssuedProductOfficeLasted
May 1, 2:12 PM EDTTornado WatchSPC8 hr

The nearest sounding before it

Buffalo Intl Airport, NY (KBUF), launched 12:00Z, 7.8 hours before the alert went out and 30 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 2017-05-01Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°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 2017-05-01The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 306 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
1242 m above ground
0-6 km bulk shear
48 kt
0-1 km storm-relative helicity
306 m²/s²
0-3 km storm-relative helicity
318 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

795 
WUUS51 KBUF 011947
SVRBUF
NYC029-037-063-073-121-012045-
/O.NEW.KBUF.SV.W.0007.170501T1947Z-170501T2045Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Buffalo NY
347 PM EDT MON MAY 1 2017

The National Weather Service in Buffalo has issued a

* Severe Thunderstorm Warning for...
  Wyoming County in western New York...
  Eastern Erie County in western New York...
  Eastern Niagara County in western New York...
  Orleans County in western New York...
  Genesee County in western New York...

* Until 445 PM EDT.

* At 347 PM EDT, severe thunderstorms were located along a line
  extending from Lockport to near Alden to Springville, moving
  northeast at 60 mph.

  HAZARD...70 mph wind gusts. 

  SOURCE...Radar indicated. 

  IMPACT...Expect considerable tree damage. Damage is likely to 
           mobile homes, roofs, and outbuildings. 

* Locations impacted include...
  Batavia, Medina, Albion, Darien Lakes State Park, Newfane, Le Roy,
  Pembroke and Warsaw.

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.

Torrential rainfall is occurring with these storms, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.

&&

A tornado watch remains in effect until 1000 PM EDT for western New
York.

LAT...LON 4254 7847 4253 7851 4252 7852 4252 7861
      4295 7853 4336 7871 4341 7812 4301 7798
      4252 7807 4252 7846
TIME...MOT...LOC 1947Z 239DEG 51KT 4318 7872 4291 7857 4252 7868 

HAIL...<.75IN
WIND...70MPH
 
$$

HITCHCOCK
3 follow-up statements
338 
WWUS51 KBUF 012011
SVSBUF

Severe Weather Statement
National Weather Service Buffalo NY
411 PM EDT MON MAY 1 2017

NYC029-037-063-073-121-012045-
/O.CON.KBUF.SV.W.0007.000000T0000Z-170501T2045Z/
Wyoming NY-Erie NY-Niagara NY-Orleans NY-Genesee NY-
411 PM EDT MON MAY 1 2017

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 445 PM EDT
FOR WYOMING...EASTERN ERIE...EASTERN NIAGARA...ORLEANS AND GENESEE
COUNTIES...

At 409 PM EDT, severe thunderstorms were located along a line
extending from near Middleport to near Oakfield to near Chaffee,
moving northeast at 50 mph.

HAZARD...70 mph wind gusts. 

SOURCE...Radar indicated. 

IMPACT...Expect considerable tree damage. Damage is likely to mobile 
         homes, roofs, and outbuildings. Although not an immediate 
         threat, this storm is capable of producing a tornado.

Locations impacted include...
Batavia, Medina, Albion, Darien Lakes State Park, Newfane, Le Roy,
Pembroke and Warsaw.

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.

Torrential rainfall is occurring with these storms, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.

&&

A tornado watch remains in effect until 1000 PM EDT for western New
York.

LAT...LON 4254 7847 4253 7851 4252 7852 4252 7861
      4295 7853 4336 7871 4341 7812 4301 7798
      4252 7807 4252 7846
TIME...MOT...LOC 2009Z 239DEG 42KT 4329 7845 4302 7830 4263 7841 

TORNADO...POSSIBLE
HAIL...<.75IN
WIND...70MPH
 
$$

Church
484 
WWUS51 KBUF 012031
SVSBUF

Severe Weather Statement
National Weather Service Buffalo NY
431 PM EDT MON MAY 1 2017

NYC029-063-012040-
/O.CAN.KBUF.SV.W.0007.000000T0000Z-170501T2045Z/
Erie NY-Niagara NY-
431 PM EDT MON MAY 1 2017

...THE SEVERE THUNDERSTORM WARNING FOR EASTERN ERIE AND EASTERN
NIAGARA COUNTIES IS CANCELLED...

The storms which prompted the warning have moved out of the warned 
area. Therefore, the warning has been cancelled.

A tornado watch remains in effect until 1000 PM EDT for western New
York.

LAT...LON 4300 7829 4338 7843 4341 7812 4301 7798
      4252 7807 4252 7845
TIME...MOT...LOC 2030Z 239DEG 51KT 4344 7812 4317 7797 4278 7808 

$$

NYC037-073-121-012045-
/O.CON.KBUF.SV.W.0007.000000T0000Z-170501T2045Z/
Wyoming NY-Orleans NY-Genesee NY-
431 PM EDT MON MAY 1 2017

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 445 PM EDT
FOR WYOMING...ORLEANS AND CENTRAL GENESEE COUNTIES...

At 430 PM EDT, severe thunderstorms were located along a line
extending from near Point Breeze to near Brockport to near Warsaw,
moving northeast at 60 mph.

HAZARD...70 mph wind gusts. 

SOURCE...Radar indicated. 

IMPACT...Expect considerable tree damage. Damage is likely to mobile 
         homes, roofs, and outbuildings. 

Locations impacted include...
Batavia, Medina, Albion, Le Roy, Warsaw, Attica, Pavilion and Byron. 

This includes Interstate 90 near exit 48.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Torrential rainfall is occurring with these storms, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.

&&

A tornado watch remains in effect until 1000 PM EDT for western New
York.

LAT...LON 4300 7829 4338 7843 4341 7812 4301 7798
      4252 7807 4252 7845
TIME...MOT...LOC 2030Z 239DEG 51KT 4344 7812 4317 7797 4278 7808 

TORNADO...POSSIBLE
HAIL...<.75IN
WIND...70MPH
 
$$

Church
905 
WWUS51 KBUF 012046
SVSBUF

Severe Weather Statement
National Weather Service Buffalo NY
446 PM EDT MON MAY 1 2017

NYC037-073-121-012055-
/O.EXP.KBUF.SV.W.0007.000000T0000Z-170501T2045Z/
Wyoming NY-Orleans NY-Genesee NY-
446 PM EDT MON MAY 1 2017

...THE SEVERE THUNDERSTORM WARNING FOR WYOMING...ORLEANS AND CENTRAL
GENESEE COUNTIES HAS EXPIRED...
    
The storms which prompted the warning have moved out of the area.
Therefore the warning has been allowed to expire.

Remember, a Severe Thunderstorm Warning still remains in effect for 
far eastern Orleans, Genesee and Wyoming counties eastward into 
Monroe and Livingston.

A tornado watch remains in effect until 1000 PM EDT for western New
York.

LAT...LON 4300 7829 4338 7843 4341 7812 4301 7798
      4252 7807 4252 7845
TIME...MOT...LOC 2045Z 239DEG 51KT 4353 7790 4326 7775 4288 7786 

$$

Church

The office that day

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

IssuedProductOfficeCountiesLasted
Apr 30, 8:20 PM EDTSpecial Weather StatementBUFOntario40 min
Apr 30, 9:57 PM EDTSpecial Weather StatementBUFNiagara48 min
Apr 30, 10:09 PM EDTSpecial Marine WarningBUF81 min
Apr 30, 10:34 PM EDTSevere Thunderstorm WarningBUFErie, Niagara41 min
May 1, 3:45 AM EDTLakeshore Flood WarningBUFCayuga, Jefferson, Oswego, Wayne60 hr
May 1, 6:16 AM EDTFlood WatchBUFAllegany, Cattaraugus, Cayuga, Chautauqua, Erie, Genesee and 10 more13 hr
May 1, 2:10 PM EDTSpecial Marine WarningBUF95 min
May 1, 2:20 PM EDTSevere Thunderstorm WarningBUFChautauqua55 min
May 1, 2:40 PM EDTSpecial Marine WarningBUF65 min
May 1, 2:41 PM EDTSpecial Marine WarningBUF64 min
May 1, 3:00 PM EDTSevere Thunderstorm WarningBUFErie, Niagara60 min
May 1, 3:06 PM EDTSevere Thunderstorm WarningBUFCattaraugus, Chautauqua, Erie54 min
May 1, 3:26 PM EDTSpecial Marine WarningBUF94 min
May 1, 3:50 PM EDTSevere Thunderstorm WarningBUFAllegany, Cattaraugus55 min
May 1, 4:16 PM EDTSevere Thunderstorm WarningBUFGenesee, Livingston, Monroe, Orleans, Wyoming14 min
May 1, 4:24 PM EDTSevere Thunderstorm WarningBUFGenesee, Livingston, Monroe, Orleans, Wyoming51 min
May 1, 4:28 PM EDTSevere Thunderstorm WarningBUFAllegany, Livingston62 min
May 1, 4:45 PM EDTAreal Flood WarningBUFAllegany, Cattaraugus, Chautauqua, Erie, Genesee, Livingston and 5 more3 hr
May 1, 4:49 PM EDTSpecial Marine WarningBUF116 min
May 1, 4:52 PM EDTSevere Thunderstorm WarningBUFLivingston, Monroe, Ontario, Wayne53 min
May 1, 5:18 PM EDTSmall Craft AdvisoryBUF47 hr
May 1, 5:36 PM EDTSevere Thunderstorm WarningBUFJefferson, Oswego54 min
May 1, 5:38 PM EDTSpecial Marine WarningBUF97 min
May 1, 5:46 PM EDTSevere Thunderstorm WarningBUFCayuga, Ontario, Wayne59 min
May 1, 6:09 PM EDTSevere Thunderstorm WarningBUFJefferson, Lewis, Oswego66 min
May 1, 6:45 PM EDTSpecial Marine WarningBUF60 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.