Alert archive / New York / Special Weather Statements in 2023

Special Weather Statement, NWS Buffalo, NY

July 18, 2023Niagara County, New York

NWS Buffalo, NY issued this special weather statement at Jul 18, 2023, 10:18 AM EDT for Niagara County, New York. It was in force for 42 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 18, 2023, 10:18 AM EDT (14:18 UTC)
Expired
Jul 18, 2023, 11:00 AM EDT
In force
42 min
Issued by
NWS Buffalo, NY
Hail
0.25 in
Wind
40

County Niagara County, NY

The radar

The Buffalo radar (KBUF), 33 km from the middle of the area, began a volume at 14:21 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, 2.3 hours before the alert went out and 36 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 2023-07-18Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 294 joules per kilogram.LCLLFCEL10008507005003002001001 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 2023-07-18The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -7 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
294 J/kg
Mixed-layer CIN
-32 J/kg
Mixed-layer LCL
978 m above ground
0-6 km bulk shear
30 kt
0-1 km storm-relative helicity
-7 m²/s²
0-3 km storm-relative helicity
11 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

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 18, 6:57 AM EDT, 3 hours 21 minutes earlier.

Area forecast discussion, Jul 18, 6:57 AM EDT, 3 hours 21 minutes before
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  <meta name="viewport" content="width=device-width, initial-scale=1">
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  <link rel="stylesheet" href="index.css">
</head>
<body>
  <main class="wrap">
    <section class="card" role="status" aria-live="polite">
      <div class="status" id="status">Temporary Notice</div>
      <h1 id="headline">This service is currently unavailable.</h1>
      <p id="message1">
        The site you requested is temporarily down for maintenance or an unexpected outage.
      </p>
      <p id="message2">
        Please try again in a few minutes.
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Hazardous weather outlook, Jul 18, 4:54 AM EDT, 5 hours 24 minutes before
Hazardous Weather Outlook
National Weather Service Buffalo NY
454 AM EDT Tue Jul 18 2023

NYZ001>008-010>014-019>021-085-190900-
Niagara-Orleans-Monroe-Wayne-Northern Cayuga-Oswego-Jefferson-Lewis-
Northern Erie-Genesee-Wyoming-Livingston-Ontario-Chautauqua-
Cattaraugus-Allegany-Southern Erie-
454 AM EDT Tue Jul 18 2023

This Hazardous Weather Outlook is for western and north central New
York.

.DAY ONE...Today and tonight.

No hazardous weather is expected at this time.

.DAYS TWO THROUGH SEVEN...Wednesday through Monday.

No hazardous weather is expected at this time.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not expected at this time.

This product, along with other watches, warnings, advisories, and
statements issued by the National Weather Service office in Buffalo
can be found on the internet at http://www.weather.gov/buf

LEZ020-040-041-LOZ030-042>045-062>065-SLZ022-024-190900-
Upper Niagara River and Buffalo Harbor-
Lake Erie nearshore waters from Ripley to Dunkirk-
Lake Erie nearshore waters from Dunkirk to Buffalo-
Lower Niagara River-
Lake Ontario nearshore waters from the Niagara River to Hamlin Beach-
Lake Ontario nearshore waters from Hamlin Beach to Sodus Bay-
Lake Ontario nearshore waters from Sodus Bay to Mexico Bay-
Lake Ontario nearshore waters from Mexico Bay to the Saint Lawrence
River-
Lake Ontario open waters from the Niagara River to Hamlin Beach-
Lake Ontario open waters from Hamlin Beach to Sodus Bay-
Lake Ontario open waters from Sodus Bay to Mexico Bay-
Lake Ontario open waters from Mexico Bay to the Saint Lawrence River-
Saint Lawrence River from Cape Vincent to Ogdensburg-
Saint Lawrence River from Ogdensburg to Saint Regis-
454 AM EDT Tue Jul 18 2023

This Hazardous Weather Outlook is for the New York waters of Lake
Erie, Lake Ontario, and the Saint Lawrence River.

.DAY ONE...Today and tonight.

No hazardous weather is expected at this time.

.DAYS TWO THROUGH SEVEN...Wednesday through Monday.

No hazardous weather is expected at this time.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not expected at this time.

This product, along with other watches, warnings, advisories, and
statements issued by the National Weather Service office in Buffalo
can be found on the internet at http://www.weather.gov/buf

In the hours before

Special weather statement, Jul 18, 7:18 AM EDT, 3 hours before
Special Weather Statement
National Weather Service Buffalo NY
718 AM EDT Tue Jul 18 2023

NYZ020-181200-
Cattaraugus-
718 AM EDT Tue Jul 18 2023

...THUNDERSTORM WITH HEAVY RAIN AFFECTING EAST CENTRAL CATTARAUGUS
COUNTY...

At 714 AM EDT, an area of showers and thunderstorm with heavy
donwpours was located near Ashford, or 9 miles northeast of
Salamanca, moving east at 25 mph. The showers and thunderstorms will
move out of the area by 8 AM EDT.

Locations impacted include...
Ashford, Franklinville, Great Valley, Ischua, Lyndon, Humphrey, and
Ellicottville.

This includes Interstate 86 near exit 27.

Heavy rain is also occurring with this storm with rainfall amounts
of a half inch to an inch falling in one hour. Due to the rain that
occurred in these same areas earlier in the night, any additional
rainfall will only result in high flows on area creeks and ponding
of water in low lying and poor drainage areas. Do not drive your
vehicle through flooded roadways.

LAT...LON 4217 7869 4235 7871 4240 7831 4217 7831
TIME...MOT...LOC 1114Z 264DEG 20KT 4227 7860

JLA
Special weather statement, Jul 18, 10:18 AM EDT, 0 minutes before
Special Weather Statement
National Weather Service Buffalo NY
1018 AM EDT Tue Jul 18 2023

NYZ001-181500-
Niagara NY-
1018 AM EDT Tue Jul 18 2023

...A STRONG THUNDERSTORM WILL IMPACT NIAGARA COUNTY THROUGH 1100 AM
EDT...

At 1017 AM EDT, Doppler radar was tracking a strong thunderstorm over
Lewiston, or near Niagara Falls, moving northeast at 20 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...
Niagara Falls, Lockport, Newfane, Lewiston, Youngstown, Fort Niagara
State Park, Sanborn, Wilson, Cambria Center, Olcott, Ransomville,
Gasport, Model City, and Appleton.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

This storm 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 4311 7906 4312 7907 4314 7904 4317 7905
      4325 7906 4327 7908 4332 7902 4339 7870
      4319 7851 4307 7905 4308 7908
TIME...MOT...LOC 1417Z 228DEG 17KT 4315 7903

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

Thomas

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 17, 11:21 PM EDTSpecial Weather StatementBUFCattaraugus39 min
Jul 17, 11:27 PM EDTSpecial Marine WarningBUF63 min
Jul 17, 11:29 PM EDTSpecial Weather StatementBUFNiagara46 min
Jul 18, 12:15 AM EDTSpecial Weather StatementBUFCattaraugus45 min
Jul 18, 12:32 AM EDTSpecial Weather StatementBUFJefferson43 min
Jul 18, 7:18 AM EDTSpecial Weather StatementBUFCattaraugus42 min
Jul 18, 11:32 AM EDTSpecial Weather StatementBUFOrleans43 min
Jul 18, 11:49 AM EDTSpecial Weather StatementBUFAllegany56 min
Jul 18, 12:09 PM EDTSpecial Marine WarningBUF51 min
Jul 18, 12:10 PM EDTSevere Thunderstorm WarningBUFMonroe, Orleans65 min
Jul 18, 12:54 PM EDTSpecial Marine WarningBUF66 min
Jul 18, 1:38 PM EDTSevere Thunderstorm WarningBUFWayne67 min
Jul 18, 1:48 PM EDTSpecial Weather StatementBUFOntario57 min
Jul 18, 1:56 PM EDTSpecial Marine WarningBUF94 min
Jul 18, 2:45 PM EDTSpecial Weather StatementBUFOntario30 min

Nearby

Special Weather Statements in New York, 2023Every 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.