Alert archive / Pennsylvania / Special Weather Statements in 2021

Special Weather Statement, NWS Pittsburgh, PA

October 16, 2021Clarion County, Pennsylvania

NWS Pittsburgh, PA issued this special weather statement at Oct 16, 2021, 7:23 AM EDT for Clarion County, Pennsylvania. It was in force for 22 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: Oct 16, 2021, 7:23 AM EDT (11:23 UTC)
Expired: Oct 16, 2021, 7:45 AM EDT
In force: 22 min
Issued by: NWS Pittsburgh, PA
Hail: 0.00 in
Wind: 50

County Clarion County, PA

The radar

The Pittsburgh radar (KPBZ), 86 km from the middle of the area, began a volume at 11:26 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 00:00Z, 11.4 hours before the alert went out and 90 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: 138 J/kg
Mixed-layer CIN: -23 J/kg
Mixed-layer LCL: 1149 m above ground
0-6 km bulk shear: 38 kt
0-1 km storm-relative helicity: 111 m²/s²
0-3 km storm-relative helicity: 153 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.7

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 Pittsburgh, PA wrote its last area forecast discussion before this special weather statement went out at Oct 16, 7:10 AM EDT, 13 minutes earlier.

Area forecast discussion, Oct 16, 7:10 AM EDT, 13 minutes before

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<head>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width, initial-scale=1">
  <title>Service Notice</title>
  <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>
      <p class="small" id="detail">
        If you are an administrator, restore upstream service and remove the redirect/fallback rule when normal operations resume.
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Hazardous weather outlook, Oct 16, 3:05 AM EDT, 4 hours 18 minutes before

Hazardous Weather Outlook
National Weather Service Pittsburgh PA
305 AM EDT Sat Oct 16 2021

OHZ039>041-048>050-057>059-068-069-PAZ007>009-013>016-020>023-029-
031-073>076-WVZ001>004-012-021-509>514-170715-
Tuscarawas-Carroll-Columbiana-Coshocton-Harrison-Jefferson OH-
Muskingum-Guernsey-Belmont-Noble-Monroe-Mercer-Venango-Forest-
Lawrence-Butler-Clarion-Jefferson PA-Beaver-Allegheny-Armstrong-
Indiana-Washington-Greene-Westmoreland-
Higher Elevations of Westmoreland-Fayette-
Higher Elevations of Fayette-Hancock-Brooke-Ohio-Marshall-Wetzel-
Marion-Monongalia-
Ridges of Eastern Monongalia and Northwestern Preston-Preston-
Eastern Preston-Western Tucker-Eastern Tucker-
305 AM EDT Sat Oct 16 2021

This Hazardous Weather Outlook is for east central Ohio, western
Pennsylvania, and northern West Virginia.

.DAY ONE...Today and tonight.

The probability for widespread hazardous weather is low.

.DAYS TWO THROUGH SEVEN...Sunday through Friday.

No hazardous weather is expected at this time.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not expected at this time.

In the hours before

Special weather statement, Oct 16, 4:31 AM EDT, 2 hours 52 minutes before

Special Weather Statement
National Weather Service Pittsburgh PA
431 AM EDT Sat Oct 16 2021

OHZ039-040-049-050-058-059-160900-
Guernsey OH-Jefferson OH-Tuscarawas OH-Harrison OH-Belmont OH-
Carroll OH-
431 AM EDT Sat Oct 16 2021

...A STRONG THUNDERSTORM WILL IMPACT HARRISON...CENTRAL JEFFERSON...
NORTHEASTERN GUERNSEY...SOUTHERN CARROLL...NORTHWESTERN BELMONT AND
SOUTHEASTERN TUSCARAWAS COUNTIES THROUGH 500 AM EDT...

At 430 AM EDT, Doppler radar was tracking a strong thunderstorm near
Freeport, moving northeast at 50 mph.

HAZARD...Wind gusts up to 50 mph.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around
         unsecured objects.

Locations impacted include...
Cadiz, Freeport, Wintersville, Antrim, Hopedale, Flushing,
Smithfield, Adena, Jewett, Amsterdam, Richmond, and Holloway.

This includes Interstate 70 in Ohio between mile markers 193 and 195.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

&&

LAT...LON 4004 8133 4020 8145 4052 8082 4029 8065
TIME...MOT...LOC 0830Z 239DEG 43KT 4017 8130

MAX HAIL SIZE...0.00 IN
MAX WIND GUST...50 MPH

Local storm report, Oct 16, 5:01 AM EDT, 2 hours 22 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE PITTSBURGH PA
501 AM EDT SAT OCT 16 2021

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0351 AM     TSTM WND DMG     3 S NEW CONCORD         39.95N  81.74W
10/16/2021                   MUSKINGUM          OH   SOCIAL MEDIA

            TREES DOWN

&&

EVENT NUMBER PBZ2102406

07

Special weather statement, Oct 16, 5:37 AM EDT, 1 hour 46 minutes before

Special Weather Statement
National Weather Service Pittsburgh PA
537 AM EDT Sat Oct 16 2021

OHZ041-050-PAZ020-021-029-WVZ001-161015-
Jefferson OH-Columbiana OH-Beaver PA-Washington PA-Allegheny PA-
Hancock WV-
537 AM EDT Sat Oct 16 2021

...A STRONG THUNDERSTORM WILL IMPACT THE AREA THROUGH 615 AM EDT...

At 537 AM EDT, Doppler radar was tracking a strong thunderstorm near
New Cumberland, or 8 miles northwest of Steubenville, moving
northeast at 35 mph.

HAZARD...Wind gusts up to 50 mph.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around
         unsecured objects.

Locations impacted include...
Weirton, Steubenville, Franklin Park, East Liverpool, Aliquippa,
Beaver Falls, Monaca, Wellsville, Economy, Ambridge, New Brighton,
and Toronto.

This includes the following highways...
  Pennsylvania Turnpike between mile markers 14 and 16.
  Interstate 376 in Pennsylvania between mile markers 31 and 50.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

&&

LAT...LON 4036 8075 4052 8087 4082 8029 4058 8011
TIME...MOT...LOC 0937Z 240DEG 29KT 4048 8073

MAX HAIL SIZE...0.00 IN
MAX WIND GUST...50 MPH

Special weather statement, Oct 16, 7:23 AM EDT, 0 minutes before

Special Weather Statement
National Weather Service Pittsburgh PA
723 AM EDT Sat Oct 16 2021

PAZ015-022-161145-
Armstrong PA-Clarion PA-
723 AM EDT Sat Oct 16 2021

...STRONG THUNDERSTORMS WILL IMPACT CENTRAL ARMSTRONG AND
SOUTHWESTERN CLARION COUNTIES THROUGH 745 AM EDT...

At 721 AM EDT, Doppler radar was tracking a broken line of intense
showers along a line extending from near Rimersburg to East Brady to
Worthington, associated with a strong cold front. This line was
moving east at 40 mph.

HAZARD...Wind gusts up to 50 mph.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around
         unsecured objects.

Locations impacted include...
Rimersburg, New Bethlehem, East Brady, and Sligo.

This includes Interstate 80 in Pennsylvania near mile marker 62.

LAT...LON 4119 7939 4099 7932 4093 7965 4103 7966
TIME...MOT...LOC 1121Z 252DEG 20KT 4105 7961 4098 7964 4090 7964

MAX HAIL SIZE...0.00 IN
MAX WIND GUST...50 MPH

Bookbinder

The office that day

Everything else NWS Pittsburgh, PA issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Oct 16, 4:52 AM EDT	Severe Thunderstorm Warning	PBZ	Beaver, Washington	38 min
Oct 16, 5:37 AM EDT	Special Weather Statement	PBZ	Beaver	38 min
Oct 16, 5:47 AM EDT	Severe Thunderstorm Warning	PBZ	Allegheny, Beaver, Washington	43 min
Oct 16, 6:07 AM EDT	Tornado Warning	PBZ	Beaver	23 min
Oct 16, 6:54 AM EDT	Tornado Warning	PBZ	Butler	21 min
Oct 16, 7:40 AM EDT	Severe Thunderstorm Warning	PBZ	Armstrong, Clarion, Jefferson	35 min
Oct 16, 8:13 AM EDT	Severe Thunderstorm Warning	PBZ	Jefferson	17 min
Oct 16, 7:44 AM EDT	Special Weather Statement	PBZ	Preston	31 min
Oct 16, 4:31 AM EDT	Special Weather Statement	PBZ	Harrison, Jefferson	29 min

Nearby

Special Weather Statements in Pennsylvania, 2021 Every special weather statement in 2021

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.