Alert archive / New York / Severe Thunderstorm Warnings in 2017

Severe Thunderstorm Warning 5, NWS Buffalo, NY

May 1, 2017Erie County, Niagara County, New York

NWS Buffalo, NY issued this severe thunderstorm warning at May 1, 2017, 3:00 PM EDT for Erie County, Niagara County, New York. It was in force for 60 min. 4 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, 3:00 PM EDT (19:00 UTC)
Expired: May 1, 2017, 4:00 PM EDT
In force: 60 min
Issued by: NWS Buffalo, NY
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

Counties Erie County, NY, Niagara County, NY

The radar

The Buffalo radar (KBUF), 17 km from the middle of the area, began a volume at 19:01 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
May 1, 3:36 PM EDT	TSTM WND DMG	Blasdell, NY	LARGE TREE DOWN ON GILBERT.
May 1, 3:36 PM EDT	TSTM WND DMG	North Tonawanda, NY	TREE DOWN ON HOUSE.
May 1, 3:41 PM EDT	TSTM WND DMG	2 N North Tonawanda, NY	POWER POLE AND LINES DOWN.
May 1, 3:41 PM EDT	TSTM WND DMG	Depew, NY	NUMEROUS LARGE TREES SNAPPED AND UPROOTED.

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.

Issued	Product	Office	Lasted
May 1, 2:12 PM EDT	Tornado Watch	SPC	8 hr

The nearest sounding before it

Buffalo Intl Airport, NY (KBUF), launched 12:00Z, 7.0 hours before the alert went out and 20 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: 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.

251 
WUUS51 KBUF 011900
SVRBUF
NYC029-063-012000-
/O.NEW.KBUF.SV.W.0005.170501T1900Z-170501T2000Z/

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

The National Weather Service in Buffalo has issued a

* Severe Thunderstorm Warning for...
  Northern Erie County in western New York...
  Niagara County in western New York...

* Until 400 PM EDT.

* At 300 PM EDT, severe thunderstorms were located along a line
  extending from 6 miles west of Fort Niagara State Park to near
  Dunkirk, moving northeast at 55 mph.

  HAZARD...60 mph wind gusts. 

  SOURCE...Radar indicated. 

  IMPACT...Expect damage to roofs, siding, and trees. 

* Locations impacted include...
  Buffalo, Cheektowaga, Niagara Falls, West Seneca, North Tonawanda,
  Clarence, Lockport and Lackawanna.

This includes Interstate 90 between exits 57 and 49.
 
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 4273 7908 4280 7892 4284 7893 4291 7890
      4295 7892 4300 7902 4306 7900 4308 7908
      4315 7904 4325 7906 4330 7909 4340 7864
      4341 7845 4277 7849 4269 7910
TIME...MOT...LOC 1900Z 232DEG 49KT 4325 7918 4257 7934 

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

HITCHCOCK

2 follow-up statements

497 
WWUS51 KBUF 011933
SVSBUF

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

NYC029-063-012000-
/O.CON.KBUF.SV.W.0005.000000T0000Z-170501T2000Z/
Erie NY-Niagara NY-
333 PM EDT MON MAY 1 2017

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 400 PM EDT
FOR NORTHERN ERIE AND NIAGARA COUNTIES...

At 332 PM EDT, severe thunderstorms were located along a line
extending from 15 miles north of Newfane to Small Boat Harbor, moving
northeast at 55 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...
Buffalo, Cheektowaga, Niagara Falls, West Seneca, North Tonawanda,
Clarence, Lockport and Lackawanna.

This includes Interstate 90 between exits 57 and 49.
 
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 4273 7908 4280 7892 4284 7893 4291 7890
      4295 7892 4300 7902 4306 7900 4308 7908
      4315 7904 4325 7906 4330 7909 4340 7864
      4341 7845 4277 7849 4269 7910
TIME...MOT...LOC 1932Z 232DEG 49KT 4351 7872 4283 7889 

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

Church

934 
WWUS51 KBUF 012003
SVSBUF

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

NYC029-063-012012-
/O.EXP.KBUF.SV.W.0005.000000T0000Z-170501T2000Z/
Erie NY-Niagara NY-
403 PM EDT MON MAY 1 2017

...THE SEVERE THUNDERSTORM WARNING FOR NORTHERN ERIE AND NIAGARA
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 
eastern Erie county and eastern Niagara Counties into Orleans, 
Genesee and Wyoming counties.

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

LAT...LON 4273 7908 4280 7892 4284 7893 4291 7890
      4295 7892 4300 7902 4306 7900 4308 7908
      4315 7904 4325 7906 4330 7909 4340 7864
      4341 7845 4277 7849 4269 7910
TIME...MOT...LOC 2002Z 232DEG 49KT 4375 7829 4307 7846 

$$

Church

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 30, 8:20 PM EDT	Special Weather Statement	BUF	Ontario	40 min
Apr 30, 9:57 PM EDT	Special Weather Statement	BUF	Niagara	48 min
Apr 30, 10:09 PM EDT	Special Marine Warning	BUF		81 min
Apr 30, 10:34 PM EDT	Severe Thunderstorm Warning	BUF	Erie, Niagara	41 min
May 1, 3:45 AM EDT	Lakeshore Flood Warning	BUF	Cayuga, Jefferson, Oswego, Wayne	60 hr
May 1, 6:16 AM EDT	Flood Watch	BUF	Allegany, Cattaraugus, Cayuga, Chautauqua, Erie, Genesee and 10 more	13 hr
May 1, 2:10 PM EDT	Special Marine Warning	BUF		95 min
May 1, 2:20 PM EDT	Severe Thunderstorm Warning	BUF	Chautauqua	55 min
May 1, 2:40 PM EDT	Special Marine Warning	BUF		65 min
May 1, 2:41 PM EDT	Special Marine Warning	BUF		64 min
May 1, 3:06 PM EDT	Severe Thunderstorm Warning	BUF	Cattaraugus, Chautauqua, Erie	54 min
May 1, 3:26 PM EDT	Special Marine Warning	BUF		94 min
May 1, 3:47 PM EDT	Severe Thunderstorm Warning	BUF	Erie, Genesee, Niagara, Orleans, Wyoming	58 min
May 1, 3:50 PM EDT	Severe Thunderstorm Warning	BUF	Allegany, Cattaraugus	55 min
May 1, 4:16 PM EDT	Severe Thunderstorm Warning	BUF	Genesee, Livingston, Monroe, Orleans, Wyoming	14 min
May 1, 4:24 PM EDT	Severe Thunderstorm Warning	BUF	Genesee, Livingston, Monroe, Orleans, Wyoming	51 min
May 1, 4:28 PM EDT	Severe Thunderstorm Warning	BUF	Allegany, Livingston	62 min
May 1, 4:45 PM EDT	Areal Flood Warning	BUF	Allegany, Cattaraugus, Chautauqua, Erie, Genesee, Livingston and 5 more	3 hr
May 1, 4:49 PM EDT	Special Marine Warning	BUF		116 min
May 1, 4:52 PM EDT	Severe Thunderstorm Warning	BUF	Livingston, Monroe, Ontario, Wayne	53 min
May 1, 5:18 PM EDT	Small Craft Advisory	BUF		47 hr
May 1, 5:36 PM EDT	Severe Thunderstorm Warning	BUF	Jefferson, Oswego	54 min
May 1, 5:38 PM EDT	Special Marine Warning	BUF		97 min
May 1, 5:46 PM EDT	Severe Thunderstorm Warning	BUF	Cayuga, Ontario, Wayne	59 min
May 1, 6:09 PM EDT	Severe Thunderstorm Warning	BUF	Jefferson, Lewis, Oswego	66 min
May 1, 6:45 PM EDT	Special Marine Warning	BUF		60 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.