Alert archive / New York / Severe Thunderstorm Warnings in 2026

Severe Thunderstorm Warning 71, NWS Buffalo, NY

July 18, 20265 counties in New York

NWS Buffalo, NY issued this severe thunderstorm warning at Jul 18, 2026, 11:41 AM EDT for 5 counties in New York. It was in force for 64 min. 2 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: Jul 18, 2026, 11:41 AM EDT (15:41 UTC)
Expired: Jul 18, 2026, 12:45 PM EDT
In force: 64 min
Issued by: NWS Buffalo, NY
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

Counties Genesee County, NY, Livingston County, NY, Monroe County, NY, Niagara County, NY, Orleans County, NY

The radar

The Buffalo radar (KBUF), 79 km from the middle of the area, began a volume at 15:44 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 18, 11:44 AM EDT	TSTM WND DMG	Barre, NY	Tree and wires down in Barre.
Jul 18, 12:34 PM EDT	TSTM WND DMG	5 Nnw Bergen, NY	Tree down across West Sweden Road.

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 12:00Z, 3.7 hours before the alert went out and 76 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: 176 J/kg
Mixed-layer CIN: -138 J/kg
Mixed-layer LCL: 958 m above ground
0-6 km bulk shear: 44 kt
0-1 km storm-relative helicity: 173 m²/s²
0-3 km storm-relative helicity: 212 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.1

Open this sounding in Storm Lab

The text

As transmitted.

070 
WUUS51 KBUF 181541
SVRBUF
NYC037-051-055-063-073-181645-
/O.NEW.KBUF.SV.W.0071.260718T1541Z-260718T1645Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Buffalo NY
1141 AM EDT Sat Jul 18 2026

The National Weather Service in Buffalo has issued a

* Severe Thunderstorm Warning for...
  North central Livingston County in western New York...
  East central Niagara County in western New York...
  Orleans County in western New York...
  Genesee County in western New York...
  Monroe County in western New York...

* Until 1245 PM EDT.

* At 1141 AM EDT, severe thunderstorms were located along a line
  extending from near Brockport to near Oakfield to near Middleport,
  moving southeast at 25 mph.

  HAZARD...60 mph wind gusts.

  SOURCE...Radar indicated.

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

* Locations impacted include...
  Rochester, Greece, Irondequoit, Chili, Batavia, Brockport, East
  Rochester, Medina, Albion, and Hilton.

This includes the following highways...
 Interstate 390 between exits 11 and 12.
 Interstate 90 between exits 46 and 48.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4336 7792 4333 7772 4310 7737 4304 7737
      4304 7748 4299 7749 4294 7767 4290 7796
      4292 7818 4321 7865
TIME...MOT...LOC 1541Z 307DEG 22KT 4327 7792 4315 7831 4316 7851 

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

Brothers

1 follow-up statement

765 
WWUS51 KBUF 181616
SVSBUF

Severe Weather Statement
National Weather Service Buffalo NY
1216 PM EDT Sat Jul 18 2026

NYC063-181625-
/O.CAN.KBUF.SV.W.0071.000000T0000Z-260718T1645Z/
Niagara NY-
1216 PM EDT Sat Jul 18 2026

...THE SEVERE THUNDERSTORM WARNING FOR EAST CENTRAL NIAGARA COUNTY IS
CANCELLED...

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

&&

LAT...LON 4297 7815 4312 7847 4321 7846 4321 7824
      4330 7799 4333 7772 4310 7737 4304 7737
      4304 7748 4299 7749 4294 7767 4294 7796
TIME...MOT...LOC 1615Z 287DEG 31KT 4318 7756 4306 7795 4308 7815 

$$

NYC037-051-055-073-181645-
/O.CON.KBUF.SV.W.0071.000000T0000Z-260718T1645Z/
Livingston NY-Orleans NY-Genesee NY-Monroe NY-
1216 PM EDT Sat Jul 18 2026

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1245 PM EDT
FOR NORTH CENTRAL LIVINGSTON...SOUTHERN ORLEANS...NORTHERN GENESEE
AND MONROE COUNTIES...

At 1215 PM EDT, severe thunderstorms were located along a line
extending from near Irondequoit to near Churchville to near Byron,
moving east at 35 mph.

HAZARD...60 mph wind gusts.

SOURCE...Radar indicated.

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

Locations impacted include...
Rochester, Greece, Irondequoit, Chili, Batavia, Brockport, East
Rochester, Medina, Hilton, and Fairport.

This includes the following highways...
 Interstate 390 between exits 11 and 12.
 Interstate 90 between exits 46 and 48.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4297 7815 4312 7847 4321 7846 4321 7824
      4330 7799 4333 7772 4310 7737 4304 7737
      4304 7748 4299 7749 4294 7767 4294 7796
TIME...MOT...LOC 1615Z 287DEG 31KT 4318 7756 4306 7795 4308 7815 

TORNADO...POSSIBLE
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

Brothers

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 18, 3:46 AM EDT	Beach Hazards Statement	BUF	Cayuga, Chautauqua, Erie, Jefferson, Monroe, Orleans and 2 more	26 hr
Jul 18, 10:43 AM EDT	Special Marine Warning	BUF		51 min
Jul 18, 12:04 PM EDT	Special Marine Warning	BUF		56 min
Jul 18, 12:35 PM EDT	Severe Thunderstorm Warning	BUF	Livingston, Monroe, Ontario, Wayne	70 min
Jul 18, 12:55 PM EDT	Flash Flood Warning	BUF	Genesee, Monroe, Niagara, Orleans	6 hr
Jul 18, 1:05 PM EDT	Tornado Warning	BUF	Ontario	40 min
Jul 18, 1:06 PM EDT	Special Marine Warning	BUF		54 min
Jul 18, 1:25 PM EDT	Severe Thunderstorm Warning	BUF	Genesee, Niagara, Orleans	65 min
Jul 18, 1:59 PM EDT	Special Marine Warning	BUF		46 min
Jul 18, 2:24 PM EDT	Severe Thunderstorm Warning	BUF	Erie, Genesee, Livingston, Monroe, Niagara, Orleans	81 min
Jul 18, 2:44 PM EDT	Tornado Warning	BUF	Genesee, Livingston, Monroe, Orleans	31 min
Jul 18, 3:25 PM EDT	Severe Thunderstorm Warning	BUF	Livingston, Monroe, Ontario, Wayne	65 min
Jul 18, 3:32 PM EDT	Special Marine Warning	BUF		43 min
Jul 18, 3:40 PM EDT	Severe Thunderstorm Warning	BUF	Erie, Genesee, Livingston, Wyoming	47 min
Jul 18, 3:54 PM EDT	Areal Flood Warning	BUF	Monroe	15 hr
Jul 18, 4:05 PM EDT	Flash Flood Warning	BUF	Livingston, Monroe, Ontario	4 hr
Jul 18, 4:10 PM EDT	Severe Thunderstorm Warning	BUF	Cattaraugus, Chautauqua	50 min
Jul 18, 4:35 PM EDT	Special Marine Warning	BUF		85 min

Nearby

Severe Thunderstorm Warnings in New York, 2026 Every severe thunderstorm warning in 2026

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.