Alert archive / Pennsylvania / Special Weather Statements in 2021

Special Weather Statement, NWS State College, PA

November 12, 2021Columbia County, Montour County, Pennsylvania

NWS State College, PA issued this special weather statement at Nov 12, 2021, 5:10 AM EST for Columbia County, Montour County, Pennsylvania. It was in force for 35 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: Nov 12, 2021, 5:10 AM EST (10:10 UTC)
Expired: Nov 12, 2021, 5:45 AM EST
In force: 35 min
Issued by: NWS State College, PA
Hail: 0.00 in
Wind: 50

Counties Columbia County, PA, Montour County, PA

The radar

The State College radar (KCCX), 126 km from the middle of the area, began a volume at 10:14 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

Washington/Dulle, VA (KIAD), launched 00:00Z, 10.2 hours before the alert went out and 245 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 1411 m above ground
0-6 km bulk shear: 51 kt
0-1 km storm-relative helicity: 161 m²/s²
0-3 km storm-relative helicity: 186 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 State College, PA wrote its last area forecast discussion before this special weather statement went out at Nov 12, 5:02 AM EST, 8 minutes earlier.

Area forecast discussion, Nov 12, 5:02 AM EST, 8 minutes before

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Hazardous weather outlook, Nov 12, 12:05 AM EST, 5 hours 5 minutes before

Hazardous Weather Outlook
National Weather Service State College PA
1205 AM EST Fri Nov 12 2021

PAZ004>006-010>012-017>019-024>027-033>035-037-041-042-045-046-
130515-
Warren-McKean-Potter-Elk-Cameron-Northern Clinton-Clearfield-
Northern Centre-Southern Centre-Cambria-Blair-Huntingdon-Mifflin-
Somerset-Bedford-Fulton-Tioga-Northern Lycoming-Sullivan-
Southern Clinton-Southern Lycoming-
1205 AM EST Fri Nov 12 2021

This Hazardous Weather Outlook is for central Pennsylvania.

.DAY ONE...Tonight.

The probability for widespread hazardous weather is low.

.DAYS TWO THROUGH SEVEN...Friday through Wednesday.

The probability for widespread hazardous weather is low.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not expected at this time.

PAZ028-036-049>053-056>059-063>066-130515-
Juniata-Franklin-Union-Snyder-Montour-Northumberland-Columbia-Perry-
Dauphin-Schuylkill-Lebanon-Cumberland-Adams-York-Lancaster-
1205 AM EST Fri Nov 12 2021

This Hazardous Weather Outlook is for central Pennsylvania.

.DAY ONE...Tonight.

A narrow squall line may produce a few instances of strong to
locally damaging wind gusts late tonight into the pre dawn hours
Friday morning.

.DAYS TWO THROUGH SEVEN...Friday through Wednesday.

The probability for widespread hazardous weather is low.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not expected at this time.

MRS

In the hours before

Special weather statement, Nov 12, 1:09 AM EST, 4 hours 1 minute before

Special Weather Statement
National Weather Service State College PA
109 AM EST Fri Nov 12 2021

PAZ004>006-010-011-017-018-024-025-033-120730-
McKean PA-Warren PA-Potter PA-Northern Centre PA-Cameron PA-
Somerset PA-Clearfield PA-Blair PA-Cambria PA-Elk PA-
109 AM EST Fri Nov 12 2021

...A LINE OF SHOWERS WITH STRONG WIND GUSTS WILL IMPACT ELK...EASTERN
WARREN...CLEARFIELD...SOUTHWESTERN CENTRE...NORTH CENTRAL SOMERSET...
MCKEAN...WESTERN POTTER...BLAIR...CAMERON AND CAMBRIA COUNTIES
THROUGH 230 AM EST...

At 107 AM EST, Doppler radar was tracking a line of showers with
strong wind gusts along a line extending from near Scandia to near
Reynoldsville to near Jerome. Movement was northeast at 30 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...
Altoona, Johnstown, St. Marys, Bradford, DuBois, Clearfield,
Hollidaysburg, Tyrone, Westmont, Ridgway, Kane, Ebensburg, Belmont,
Nanty-Glo, Portage, Johnsonburg, Allegany State Park, Sandy, Cameron
and Northern Cambria.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

&&

LAT...LON 4200 7813 4142 7806 4079 7815 4074 7823
      4074 7816 4068 7822 4062 7818 4041 7821
      4019 7909 4072 7880 4114 7880 4120 7876
      4120 7871 4126 7874 4136 7900 4162 7896
      4163 7904 4200 7909
TIME...MOT...LOC 0607Z 246DEG 26KT 4197 7905 4113 7894 4027 7906

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

Steinbugl

Special weather statement, Nov 12, 3:17 AM EST, 1 hour 53 minutes before

Special Weather Statement
National Weather Service State College PA
317 AM EST Fri Nov 12 2021

PAZ036-063-064-120900-
Adams PA-Franklin PA-Cumberland PA-
317 AM EST Fri Nov 12 2021

...A LINE OF SHOWERS WITH STRONG WIND GUSTS WILL IMPACT WESTERN
ADAMS...SOUTHEASTERN FRANKLIN AND WESTERN CUMBERLAND COUNTIES THROUGH
400 AM EST...

At 315 AM EST, Doppler radar was tracking a line of showers with
strong wind gusts along a line extending from near St. Thomas to
Shepherdstown. Movement was northeast 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...
Chambersburg, Carlisle, Waynesboro, Shippensburg, Greencastle,
Guilford, Plainfield, St. Thomas, Carroll Valley, Fayetteville, Wayne
Heights, Mont Alto, Scotland, Newville, Rouzerville, Marion,
Cashtown, Orrtanna, Pine Grove Furnace and Colonel Denning State
Park.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

&&

LAT...LON 3996 7778 4031 7740 4032 7736 4026 7742
      4026 7740 4029 7733 4028 7733 4027 7730
      4029 7722 3972 7728 3972 7780
TIME...MOT...LOC 0815Z 224DEG 34KT 3994 7773 3945 7778

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

Steinbugl

Special weather statement, Nov 12, 4:25 AM EST, 45 minutes before

Special Weather Statement
National Weather Service State College PA
425 AM EST Fri Nov 12 2021

PAZ028-050-056-121000-
Perry PA-Juniata PA-Snyder PA-
425 AM EST Fri Nov 12 2021

...A SHOWER WITH STRONG WIND GUSTS WILL IMPACT NORTHEASTERN
JUNIATA...EASTERN SNYDER AND NORTHEASTERN PERRY COUNTIES THROUGH 500
AM EST...

At 423 AM EST, Doppler radar was tracking a heavy shower with strong
wind gusts near Richfield, moving northeast at 45 mph.

HAZARD...Wind gusts up to 50 mph.

SOURCE...Radar indicated.

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

This strong thunderstorm will be near...
  Mount Pleasant Mills around 435 AM EST.
  Meiserville, Fremont and Middleburg around 440 AM EST.
  Port Trevorton around 445 AM EST.
  Kreamer around 450 AM EST.
  Selinsgrove, Hummels Wharf and Kratzerville around 455 AM EST.
  Shamokin Dam around 500 AM EST.

Other locations impacted by this storm include Liverpool,
Millerstown, Freeburg, East Salem and Selinsgrove Airport.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

&&

LAT...LON 4062 7729 4089 7693 4088 7692 4089 7682
      4088 7680 4078 7686 4072 7686 4069 7687
      4064 7694 4059 7696 4057 7699 4055 7699
      4047 7714
TIME...MOT...LOC 0923Z 231DEG 37KT 4061 7713

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

Jurewicz

Special weather statement, Nov 12, 4:49 AM EST, 21 minutes before

Special Weather Statement
National Weather Service State College PA
449 AM EST Fri Nov 12 2021

PAZ050-052-121015-
Northumberland PA-Snyder PA-
449 AM EST Fri Nov 12 2021

...A SHOWER WITH STRONG WIND GUSTS WILL IMPACT CENTRAL NORTHUMBERLAND
AND EASTERN SNYDER COUNTIES THROUGH 515 AM EST...

At 448 AM EST, Doppler radar was tracking a heavy shower with strong
wind gusts over Selinsgrove, moving northeast at 45 mph.

HAZARD...Wind gusts up to 50 mph.

SOURCE...Radar indicated.

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

This strong thunderstorm will be near...
  Shamokin Dam, Rebuck and Winfield around 455 AM EST.
  Sunbury around 500 AM EST.
  Northumberland, Stonington and Trevorton around 505 AM EST.
  Riverside and Elysburg around 515 AM EST.

Other locations impacted by this storm include Seven Points,
Freeburg, Snydertown, Herndon and Selinsgrove Airport.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

&&

LAT...LON 4083 7650 4064 7687 4078 7702 4089 7687
      4089 7682 4091 7684 4095 7679 4097 7666
      4096 7663 4094 7660 4094 7656 4090 7656
      4088 7654 4088 7651
TIME...MOT...LOC 0948Z 231DEG 37KT 4077 7687

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

Jurewicz

Special weather statement, Nov 12, 5:10 AM EST, 0 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
Nov 12, 1:09 AM EST	Special Weather Statement	CTP	Blair, Cambria, Cameron, Clearfield, Elk, McKean	81 min
Nov 12, 3:17 AM EST	Special Weather Statement	CTP	Cumberland, Franklin	43 min
Nov 12, 4:25 AM EST	Special Weather Statement	CTP	Snyder	35 min
Nov 12, 4:49 AM EST	Special Weather Statement	CTP	Northumberland	26 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.