Alert archive / Pennsylvania / Special Weather Statements in 2021

Special Weather Statement, NWS State College, PA

August 11, 2021Warren County, Pennsylvania

NWS State College, PA issued this special weather statement at Aug 11, 2021, 7:14 PM EDT for Warren County, Pennsylvania. It was in force for 31 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: Aug 11, 2021, 7:14 PM EDT (23:14 UTC)
Expired: Aug 11, 2021, 7:45 PM EDT
In force: 31 min
Issued by: NWS State College, PA
Hail: 0.00 in
Wind: 50

County Warren County, PA

The radar

The State College radar (KCCX), 121 km from the middle of the area, began a volume at 23:18 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, 11.2 hours before the alert went out and 146 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: 14 J/kg
Mixed-layer CIN: -314 J/kg
Mixed-layer LCL: 1735 m above ground
0-6 km bulk shear: 36 kt
0-1 km storm-relative helicity: -51 m²/s²
0-3 km storm-relative helicity: 58 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 Aug 11, 7:09 PM EDT, 5 minutes earlier.

Area forecast discussion, Aug 11, 7:09 PM EDT, 5 minutes before

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Hazardous weather outlook, Aug 11, 6:59 PM EDT, 15 minutes before

Hazardous Weather Outlook
National Weather Service State College PA
659 PM EDT Wed Aug 11 2021

PAZ012-018-019-025>027-035-037-041-042-045-122300-
Northern Clinton-Northern Centre-Southern Centre-Blair-Huntingdon-
Mifflin-Fulton-Tioga-Northern Lycoming-Sullivan-Southern Clinton-
659 PM EDT Wed Aug 11 2021

...HEAT ADVISORY IN EFFECT FROM NOON TO 7 PM EDT THURSDAY...

This Hazardous Weather Outlook is for central Pennsylvania.

.DAY ONE...Tonight.

No hazardous weather is expected at this time.

.DAYS TWO THROUGH SEVEN...Thursday through Tuesday.

Please listen to NOAA Weather Radio or go to
weather.gov/StateCollege on the internet for more
information about the following hazards.

   Heat Advisory.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not expected at this time.

PAZ028-036-046-049>053-056>059-063>066-122300-
Juniata-Franklin-Southern Lycoming-Union-Snyder-Montour-
Northumberland-Columbia-Perry-Dauphin-Schuylkill-Lebanon-Cumberland-
Adams-York-Lancaster-
659 PM EDT Wed Aug 11 2021

...HEAT ADVISORY IN EFFECT UNTIL 7 PM EDT THIS EVENING...
...EXCESSIVE HEAT WARNING IN EFFECT FROM NOON TO 7 PM EDT THURSDAY...

This Hazardous Weather Outlook is for central Pennsylvania.

.DAY ONE...Tonight.

Please listen to NOAA Weather Radio or go to
weather.gov/StateCollege on the internet for more
information about the following hazards.

   Heat Advisory.

.DAYS TWO THROUGH SEVEN...Thursday through Tuesday.

Please listen to NOAA Weather Radio or go to
weather.gov/StateCollege on the internet for more
information about the following hazards.

   Excessive Heat Warning.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not expected at this time.

PAZ004>006-010-011-017-024-033-034-122300-
Warren-McKean-Potter-Elk-Cameron-Clearfield-Cambria-Somerset-Bedford-
659 PM EDT Wed Aug 11 2021

This Hazardous Weather Outlook is for central Pennsylvania.

.DAY ONE...Tonight.

No hazardous weather is expected at this time.

.DAYS TWO THROUGH SEVEN...Thursday through Tuesday.

Strong to severe thunderstorms with gusty winds are possible
Thursday
afternoon and evening.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not expected at this time.

In the hours before

Special weather statement, Aug 11, 5:47 PM EDT, 1 hour 27 minutes before

Special Weather Statement
National Weather Service State College PA
547 PM EDT Wed Aug 11 2021

PAZ065-066-112245-
Lancaster PA-York PA-
547 PM EDT Wed Aug 11 2021

...Strong thunderstorms will impact portions of central Lancaster and
central York Counties through 645 PM EDT...

At 546 PM EDT, Doppler radar was tracking strong thunderstorms along
a line extending from near Bainbridge to near Brogue to Delta.
Movement was east at 25 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...
Lancaster, York, Columbia, Millersville, Willow Street, Red Lion,
Spry, Dallastown, Shiloh, East York, Stonybrook-Wilshire, Paradise,
West York, Salunga-Landisville, Maytown, Grantley, Tyler Run-Queens
Gate, Strasburg, Mountville and Manchester.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

Very heavy 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 900 PM EDT for
south central Pennsylvania.

&&

LAT...LON 3987 7659 3986 7682 4014 7678 4014 7674
      4012 7672 4013 7671 4007 7642 4006 7611
      3988 7599 3980 7642
TIME...MOT...LOC 2146Z 259DEG 21KT 4010 7663 3994 7649 3971 7635

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

Colbert

Local storm report, Aug 11, 6:08 PM EDT, 1 hour 6 minutes before

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Local storm report, Aug 11, 6:09 PM EDT, 1 hour 5 minutes before

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Local storm report, Aug 11, 6:26 PM EDT, 48 minutes before

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Local storm report, Aug 11, 6:43 PM EDT, 31 minutes before

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Special weather statement, Aug 11, 7:14 PM EDT, 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
Aug 11, 12:18 AM EDT	Special Weather Statement	CTP	Union	27 min
Aug 11, 3:38 AM EDT	Excessive Heat Warning	CTP	Adams, Columbia, Cumberland, Dauphin, Franklin, Juniata and 10 more	39 hr
Aug 11, 5:03 AM EDT	Special Weather Statement	CTP	Warren	27 min
Aug 11, 6:40 AM EDT	Special Weather Statement	CTP	McKean	50 min
Aug 11, 2:11 PM EDT	Special Weather Statement	CTP	Cambria	49 min
Aug 11, 2:32 PM EDT	Severe Thunderstorm Warning	CTP	Dauphin, Lancaster, Lebanon, York	58 min
Aug 11, 2:59 PM EDT	Special Weather Statement	CTP	Somerset	61 min
Aug 11, 3:02 PM EDT	Special Weather Statement	CTP	Blair	28 min
Aug 11, 3:13 PM EDT	Severe Thunderstorm Warning	CTP	Bedford, Blair, Huntingdon	46 min
Aug 11, 3:28 PM EDT	Severe Thunderstorm Warning	CTP	Centre, Huntingdon, Mifflin	62 min
Aug 11, 3:34 PM EDT	Severe Thunderstorm Warning	CTP	Mifflin	41 min
Aug 11, 3:35 PM EDT	Special Weather Statement	CTP	Huntingdon	25 min
Aug 11, 3:49 PM EDT	Special Weather Statement	CTP	Juniata	26 min
Aug 11, 3:55 PM EDT	Special Weather Statement	CTP	Dauphin	35 min
Aug 11, 4:07 PM EDT	Special Weather Statement	CTP	York	38 min
Aug 11, 4:08 PM EDT	Special Weather Statement	CTP	Franklin	37 min
Aug 11, 4:13 PM EDT	Special Weather Statement	CTP	Juniata, Perry, Snyder, Union	32 min
Aug 11, 4:23 PM EDT	Severe Thunderstorm Warning	CTP	Centre, Snyder, Union	59 min
Aug 11, 4:37 PM EDT	Severe Thunderstorm Warning	CTP	Dauphin	53 min
Aug 11, 4:42 PM EDT	Special Weather Statement	CTP	York	33 min
Aug 11, 4:43 PM EDT	Special Weather Statement	CTP	Cumberland	32 min
Aug 11, 4:47 PM EDT	Severe Thunderstorm Warning	CTP	Dauphin, Juniata, Northumberland, Perry, Snyder	53 min
Aug 11, 4:52 PM EDT	Areal Flood Advisory	CTP	Dauphin	2 hr
Aug 11, 4:54 PM EDT	Special Weather Statement	CTP	Lebanon	36 min
Aug 11, 5:00 PM EDT	Flash Flood Warning Considerable damage threat	CTP	Cumberland, Dauphin, York	85 min
Aug 11, 5:00 PM EDT	Special Weather Statement	CTP	York	30 min
Aug 11, 5:08 PM EDT	Severe Thunderstorm Warning	CTP	Columbia, Montour, Northumberland	52 min
Aug 11, 5:14 PM EDT	Severe Thunderstorm Warning	CTP	Lancaster	46 min
Aug 11, 5:35 PM EDT	Severe Thunderstorm Warning	CTP	Columbia, Northumberland	48 min
Aug 11, 5:44 PM EDT	Areal Flood Advisory	CTP	Lancaster, Lebanon	2 hr
Aug 11, 5:47 PM EDT	Special Weather Statement	CTP	Lancaster, York	58 min
Aug 11, 5:54 PM EDT	Severe Thunderstorm Warning	CTP	Lancaster, York	51 min
Aug 11, 5:58 PM EDT	Severe Thunderstorm Warning	CTP	Lancaster	47 min
Aug 11, 6:25 PM EDT	Areal Flood Advisory	CTP	Cumberland, Dauphin, York	95 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.