Alert archive / Pennsylvania / Special Weather Statements in 2019

Special Weather Statement, NWS State College, PA

August 20, 2019Somerset County, Pennsylvania

NWS State College, PA issued this special weather statement at Aug 20, 2019, 12:40 PM EDT for Somerset County, Pennsylvania. It was in force for 50 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 20, 2019, 12:40 PM EDT (16:40 UTC)
Expired
Aug 20, 2019, 1:30 PM EDT
In force
50 min
Issued by
NWS State College, PA

County Somerset County, PA

The radar

The Pittsburgh radar (KPBZ), 114 km from the middle of the area, began a volume at 16:40 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, 4.7 hours before the alert went out and 98 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 2019-08-20Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 545 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 2019-08-20The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 14 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
545 J/kg
Mixed-layer CIN
-57 J/kg
Mixed-layer LCL
1113 m above ground
0-6 km bulk shear
13 kt
0-1 km storm-relative helicity
14 m²/s²
0-3 km storm-relative helicity
10 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 20, 7:38 AM EDT, 5 hours 2 minutes earlier.

Area forecast discussion, Aug 20, 7:38 AM EDT, 5 hours 2 minutes before
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Hazardous weather outlook, Aug 20, 3:57 AM EDT, 8 hours 43 minutes before
Hazardous Weather Outlook
National Weather Service State College PA
357 AM EDT Tue Aug 20 2019

PAZ024>026-033>036-064-210800-
Cambria-Blair-Huntingdon-Somerset-Bedford-Fulton-Franklin-Adams-
357 AM EDT Tue Aug 20 2019

This Hazardous Weather Outlook is for central Pennsylvania.

.DAY ONE...Today and tonight.

Strong to severe thunderstorms with gusty winds, frequent lightning
and small hail are possible this afternoon and early this evening
as a warm front lifts north across the region.

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

The probability for widespread hazardous weather is low.

.SPOTTER INFORMATION STATEMENT...

Spotters are encouraged to report significant hazardous weather.

PAZ004>006-010>012-017>019-037-041-042-045-046-049>053-057>059-066-
210800-
Warren-McKean-Potter-Elk-Cameron-Northern Clinton-Clearfield-
Northern Centre-Southern Centre-Tioga-Northern Lycoming-Sullivan-
Southern Clinton-Southern Lycoming-Union-Snyder-Montour-
Northumberland-Columbia-Dauphin-Schuylkill-Lebanon-Lancaster-
357 AM EDT Tue Aug 20 2019

This Hazardous Weather Outlook is for central Pennsylvania.

.DAY ONE...Today and tonight.

The probability for widespread hazardous weather is low.

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

Strong to severe thunderstorms with gusty winds, frequent lightning
and small hail are possible Wednesday afternoon and evening.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not expected at this time.

PAZ027-028-056-063-065-210800-
Mifflin-Juniata-Perry-Cumberland-York-
357 AM EDT Tue Aug 20 2019

This Hazardous Weather Outlook is for central Pennsylvania.

.DAY ONE...Today and tonight.

Strong to severe thunderstorms with gusty winds, frequent lightning
and small hail are possible this afternoon and early this evening, as
a warm front lifts north across the region.

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

Strong to severe thunderstorms with gusty winds, frequent lightning
and small hail are possible again Wednesday afternoon and evening.

.SPOTTER INFORMATION STATEMENT...

Spotters are encouraged to report significant hazardous weather.

Lambert

In the hours before

Special weather statement, Aug 20, 6:40 AM EDT, 6 hours before
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Special weather statement, Aug 20, 12:40 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.

IssuedProductOfficeCountiesLasted
Aug 20, 1:30 PM EDTSpecial Weather StatementCTPBedford45 min
Aug 20, 3:32 PM EDTSpecial Weather StatementCTPFulton28 min
Aug 20, 4:33 PM EDTSpecial Weather StatementCTPJuniata, Mifflin, Perry42 min
Aug 20, 4:39 PM EDTSpecial Weather StatementCTPSomerset36 min
Aug 20, 5:02 PM EDTSpecial Weather StatementCTPYork43 min
Aug 20, 5:07 PM EDTSpecial Weather StatementCTPAdams38 min
Aug 20, 5:30 PM EDTSpecial Weather StatementCTPCumberland30 min
Aug 20, 6:01 PM EDTSpecial Weather StatementCTPYork29 min
Aug 20, 6:04 PM EDTSpecial Weather StatementCTPYork26 min
Aug 20, 6:25 PM EDTSpecial Weather StatementCTPDauphin50 min
Aug 20, 6:28 PM EDTSpecial Weather StatementCTPYork32 min
Aug 20, 6:32 PM EDTSevere Thunderstorm WarningCTPDauphin, York43 min
Aug 20, 6:35 PM EDTSpecial Weather StatementCTPYork25 min
Aug 20, 6:41 PM EDTAreal Flood AdvisoryCTPYork3 hr
Aug 20, 6:59 PM EDTSpecial Weather StatementCTPYork31 min
Aug 20, 7:05 PM EDTAreal Flood AdvisoryCTPYork3 hr
Aug 20, 7:24 PM EDTSpecial Weather StatementCTPDauphin36 min
Aug 20, 7:29 PM EDTSpecial Weather StatementCTPLebanon31 min
Aug 20, 7:39 PM EDTSpecial Weather StatementCTPYork36 min

Nearby

Special Weather Statements in Pennsylvania, 2019Every special weather statement in 2019

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.