Alert archive / New York / Special Weather Statements in 2023

Special Weather Statement, NWS Buffalo, NY

July 13, 2023Ontario County, New York

NWS Buffalo, NY issued this special weather statement at Jul 13, 2023, 12:45 PM EDT for Ontario County, New York. It was in force for 60 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: Jul 13, 2023, 12:45 PM EDT (16:45 UTC)
Expired: Jul 13, 2023, 1:45 PM EDT
In force: 60 min
Issued by: NWS Buffalo, NY
Hail: 0.25 in
Wind: 40

County Ontario County, NY

The radar

The Buffalo radar (KBUF), 122 km from the middle of the area, began a volume at 16:48 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, 4.8 hours before the alert went out and 119 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: 448 J/kg
Mixed-layer CIN: -54 J/kg
Mixed-layer LCL: 1038 m above ground
0-6 km bulk shear: 34 kt
0-1 km storm-relative helicity: 240 m²/s²
0-3 km storm-relative helicity: 246 m²/s²
Significant tornado parameter: 0.4
Supercell composite: 3.9

Open this sounding in Storm Lab

The text

As transmitted.

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What forecasters said that day

The local office's own words before this special weather statement went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Buffalo, NY wrote its last area forecast discussion before this special weather statement went out at Jul 13, 11:11 AM EDT, 1 hour 34 minutes earlier.

Area forecast discussion, Jul 13, 11:11 AM EDT, 1 hour 34 minutes before

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Hazardous weather outlook, Jul 13, 5:22 AM EDT, 7 hours 23 minutes before

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In the hours before

Special weather statement, Jul 13, 11:43 AM EDT, 1 hour 2 minutes before

Special Weather Statement
National Weather Service Buffalo NY
1143 AM EDT Thu Jul 13 2023

NYZ003-004-011>014-020-021-131645-
Cattaraugus NY-Allegany NY-Ontario NY-Livingston NY-Wyoming NY-
Wayne NY-Genesee NY-Monroe NY-
1143 AM EDT Thu Jul 13 2023

...STRONG THUNDERSTORMS WILL IMPACT WESTERN WAYNE...WYOMING...EASTERN
CATTARAUGUS...LIVINGSTON...NORTHWESTERN ALLEGANY...MONROE...EASTERN
GENESEE AND NORTHWESTERN ONTARIO COUNTIES THROUGH 1245 PM EDT...

At 1143 AM EDT, Doppler radar was tracking strong thunderstorms along
a line extending from near Hilton to near Pavilion to near Ashford
Hollow. Movement was southeast at 30 mph.

HAZARD...Wind gusts up to 40 mph and pea size hail.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around
         unsecured objects. Minor damage to outdoor objects is
         possible.

Locations impacted include...
Rochester, Greece, Irondequoit, Chili, Olean, Geneseo, East
Rochester, Hilton, Webster, Fairport, Dansville, Brighton,
Gates-North Gates, Letchworth State Park, Ontario, Henrietta,
Penfield, Le Roy, Perry, and Spencerport.

This includes the following highways...
 Interstate 390 between exits 5 and 12.
 Interstate 90 between exits 44 and 47.
 Interstate 86 between exits 25 and 29.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

These storms may intensify, so be certain to monitor local radio
stations and available television stations for additional information
and possible warnings from the National Weather Service.

&&

LAT...LON 4203 7837 4228 7881 4252 7853 4254 7846
      4258 7846 4289 7810 4338 7775 4328 7754
      4333 7730 4330 7716 4268 7755
TIME...MOT...LOC 1543Z 297DEG 26KT 4336 7773 4288 7807 4233 7872

MAX HAIL SIZE...0.25 IN
MAX WIND GUST...40 MPH

EAJ

Special weather statement, Jul 13, 12:45 PM EDT, 0 minutes before

Special Weather Statement
National Weather Service Buffalo NY
1245 PM EDT Thu Jul 13 2023

NYZ003>006-013-014-021-131745-
Allegany NY-Ontario NY-Livingston NY-Oswego NY-Wayne NY-Monroe NY-
Northern Cayuga NY-
1245 PM EDT Thu Jul 13 2023

...STRONG THUNDERSTORMS WILL IMPACT WAYNE...SOUTHEASTERN
LIVINGSTON...CAYUGA...NORTHERN ALLEGANY...SOUTHWESTERN OSWEGO...
SOUTHEASTERN MONROE AND ONTARIO COUNTIES THROUGH 145 PM EDT...

At 1244 PM EDT, Doppler radar was tracking strong thunderstorms along
a line extending from near Fairport to near Hemlock to near Belfast.
Movement was east at 30 mph.

HAZARD...Wind gusts up to 45 mph and pea size hail.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around
         unsecured objects. Minor damage to outdoor objects is
         possible.

Locations impacted include...
Geneva, Canandaigua, East Rochester, Fairport, Dansville, Newark,
Marion, Lyons, Palmyra, Victor, Honeoye Falls, Conesus, Bristol,
Lima, Clifton Springs, Clyde, Phelps, Belfast, Bloomfield, and
Montezuma.

This includes the following highways...
 Interstate 390 between exits 4 and 6.
 Interstate 90 between exits 42 and 45.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

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

A Severe Thunderstorm Watch remains in effect until 800 PM EDT for
central and western New York.

&&

LAT...LON 4233 7822 4277 7772 4317 7744 4327 7637
      4323 7641 4323 7648 4317 7647 4302 7662
      4301 7696 4276 7698 4276 7731 4258 7737
      4258 7766 4253 7766 4253 7772 4234 7773
TIME...MOT...LOC 1644Z 263DEG 28KT 4314 7734 4279 7764 4239 7809

MAX HAIL SIZE...0.25 IN
MAX WIND GUST...40 MPH

Mitchell

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 13, 3:56 AM EDT	Beach Hazards Statement	BUF	Chautauqua, Erie, Jefferson, Oswego	19 hr
Jul 13, 11:43 AM EDT	Special Weather Statement	BUF	Cattaraugus, Livingston, Monroe, Wyoming	62 min
Jul 13, 12:08 PM EDT	Special Marine Warning	BUF		52 min
Jul 13, 12:34 PM EDT	Severe Thunderstorm Warning	BUF	Monroe, Wayne	26 min
Jul 13, 12:55 PM EDT	Special Marine Warning	BUF		65 min
Jul 13, 1:20 PM EDT	Severe Thunderstorm Warning	BUF	Cayuga, Oswego, Wayne	55 min
Jul 13, 1:40 PM EDT	Severe Thunderstorm Warning	BUF	Jefferson, Lewis, Oswego	65 min
Jul 13, 1:47 PM EDT	Special Marine Warning	BUF		88 min
Jul 13, 1:57 PM EDT	Special Marine Warning	BUF		36 min
Jul 13, 2:08 PM EDT	Severe Thunderstorm Warning	BUF	Cayuga, Oswego	67 min
Jul 13, 2:33 PM EDT	Severe Thunderstorm Warning	BUF	Jefferson, Lewis, Oswego	57 min
Jul 13, 3:28 PM EDT	Severe Thunderstorm Warning	BUF	Lewis	32 min

Nearby

Special Weather Statements in New York, 2023 Every special weather statement in 2023

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.