Alert archive / New York / Special Weather Statements in 2020

Special Weather Statement, NWS Buffalo, NY

July 9, 2020Erie County, New York

NWS Buffalo, NY issued this special weather statement at Jul 9, 2020, 5:56 PM EDT for Erie County, New York. It was in force for 34 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 9, 2020, 5:56 PM EDT (21:56 UTC)
Expired
Jul 9, 2020, 6:30 PM EDT
In force
34 min
Issued by
NWS Buffalo, NY

County Erie County, NY

The radar

The Buffalo radar (KBUF), 12 km from the middle of the area, began a volume at 21:58 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

Pittsburgh, PA (KPIT), launched 12:00Z, 9.9 hours before the alert went out and 307 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, Pittsburgh, PA at 12:00Z on 2020-07-09Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 277 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, Pittsburgh, PA at 12:00Z on 2020-07-09The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 4 square meters per square second.1939Sfc1 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
277 J/kg
Mixed-layer CIN
-58 J/kg
Mixed-layer LCL
1389 m above ground
0-6 km bulk shear
13 kt
0-1 km storm-relative helicity
4 m²/s²
0-3 km storm-relative helicity
5 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 9, 2:48 PM EDT, 3 hours 8 minutes earlier.

Area forecast discussion, Jul 9, 2:48 PM EDT, 3 hours 8 minutes before
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<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.
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      <p id="message2">
        Please try again in a few minutes.
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Hazardous weather outlook, Jul 9, 7:35 AM EDT, 10 hours 21 minutes before
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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.
      </p>
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        If you are an administrator, restore upstream service and remove the redirect/fallback rule when normal operations resume.
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In the hours before

Special weather statement, Jul 9, 5:12 PM EDT, 44 minutes before
Special Weather Statement
National Weather Service Buffalo NY
512 PM EDT Thu Jul 9 2020

NYZ020-085-092145-
Cattaraugus-Southern Erie-
512 PM EDT Thu Jul 9 2020

...A STRONG THUNDERSTORM WILL AFFECT NORTHWESTERN CATTARAUGUS AND
SOUTH CENTRAL ERIE COUNTIES...

At 510 PM EDT, two strong thunderstorms were located in Northern
Cattaraugus County. One was located near Otto, the other near
Ashford Hollow moving northwest at 5 mph.

Wind gusts to 40 mph, small hail and heavy rain are possible with
this storm. A quick half inch or more of rain will fall in some
areas in as little as fifteen minutes.

Locations impacted include...
Springville, Gowanda, Ashford Hollow, New Albion, East Otto,
Cattaraugus, Otto, Cattaraugus County Landfill and West Valley.

Occasional cloud to ground lightning is occurring with this storm.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.

LAT...LON 4237 7852 4229 7893 4250 7905 4256 7872
TIME...MOT...LOC 2110Z 152DEG 4KT 4239 7886

Welch
Special weather statement, Jul 9, 5:56 PM EDT, 0 minutes before
Special Weather Statement
National Weather Service Buffalo NY
556 PM EDT Thu Jul 9 2020

NYZ010-092230-
Northern Erie-
556 PM EDT Thu Jul 9 2020

...A STRONG THUNDERSTORM WILL AFFECT NORTHEASTERN ERIE COUNTY...

At 555 PM EDT, a strong thunderstorm was located near Clarence,
moving northwest at 10 mph.

Winds in excess of 30 mph are possible with this storm.

Locations impacted include...
Cheektowaga, Clarence, Depew, Lancaster, Akron, Alden, Clarence
Center and East Amherst.

This includes Interstate 90 near exit 49.

Torrential rainfall is also occurring with this storm, and may cause
localized flooding. Do not drive your vehicle through flooded
roadways.

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 4287 7850 4287 7872 4302 7872 4303 7851
TIME...MOT...LOC 2155Z 146DEG 6KT 4296 7867

RSH

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 9, 5:12 PM EDTSpecial Weather StatementBUFCattaraugus33 min
Jul 9, 6:45 PM EDTSpecial Weather StatementBUFErie30 min
Jul 9, 7:00 PM EDTSpecial Weather StatementBUFChautauqua45 min
Jul 9, 7:11 PM EDTSpecial Weather StatementBUFErie49 min

Nearby

Special Weather Statements in New York, 2020Every special weather statement in 2020

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.