Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2019

Severe Thunderstorm Warning 263, NWS State College, PA

August 18, 2019Centre County, Pennsylvania

NWS State College, PA issued this severe thunderstorm warning at Aug 18, 2019, 3:34 PM EDT for Centre County, Pennsylvania. It was in force for 56 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued
Aug 18, 2019, 3:34 PM EDT (19:34 UTC)
Expired
Aug 18, 2019, 4:30 PM EDT
In force
56 min
Issued by
NWS State College, PA
Area
Storm-based polygon
Hail
1.0 in
Wind
60.0 mph

County Centre County, PA

The radar

The State College radar (KCCX), 15 km from the middle of the area, began a volume at 19:33 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, 7.6 hours before the alert went out and 200 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 2019-08-18Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 566 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 2019-08-18The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 60 square meters per square second.193958Sfc1 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
566 J/kg
Mixed-layer CIN
-60 J/kg
Mixed-layer LCL
1315 m above ground
0-6 km bulk shear
33 kt
0-1 km storm-relative helicity
60 m²/s²
0-3 km storm-relative helicity
113 m²/s²
Significant tornado parameter
0.1
Supercell composite
0.7

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this severe thunderstorm warning 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 severe thunderstorm warning went out at Aug 18, 3:32 PM EDT, 2 minutes earlier.

Area forecast discussion, Aug 18, 3:32 PM EDT, 2 minutes before
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Hazardous weather outlook, Aug 18, 5:20 AM EDT, 10 hours 14 minutes before
Hazardous Weather Outlook
National Weather Service State College PA
520 AM EDT Sun Aug 18 2019

PAZ019-024>028-045-046-049>053-190930-
Southern Centre-Cambria-Blair-Huntingdon-Mifflin-Juniata-
Southern Clinton-Southern Lycoming-Union-Snyder-Montour-
Northumberland-Columbia-
520 AM EDT Sun Aug 18 2019

This Hazardous Weather Outlook is for central Pennsylvania.

.DAY ONE...Today and tonight.

Scattered to numerous late day showers and thunderstorms will
occur today. A few of the storms will become strong to severe
thunderstorms with gusty winds, locally heavy rain and frequent
lightning.

.DAYS TWO THROUGH SEVEN...Monday through Saturday.

Heat indices around 100 degrees likely both Monday and Tuesday
afternoon.

.SPOTTER INFORMATION STATEMENT...

Spotters are encouraged to report significant hazardous weather.

PAZ033>036-056>059-063>066-190930-
Somerset-Bedford-Fulton-Franklin-Perry-Dauphin-Schuylkill-Lebanon-
Cumberland-Adams-York-Lancaster-
520 AM EDT Sun Aug 18 2019

This Hazardous Weather Outlook is for central Pennsylvania.

.DAY ONE...Today and tonight.

Scattered late afternoon and early evening showers and thunderstorms
will occur today. A few of the storms will become strong to severe
thunderstorms with gusty winds, locally heavy rain and frequent
lightning.

.DAYS TWO THROUGH SEVEN...Monday through Saturday.

Heat indices around 100 degrees likely both Monday and Tuesday
afternoon.

Additional strong to locally severe thunderstorms, containing heavy
rain and gusty winds, will occur each afternoon Monday through
Wednesday.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not expected at this time.

PAZ004>006-010>012-017-018-037-041-042-190930-
Warren-McKean-Potter-Elk-Cameron-Northern Clinton-Clearfield-
Northern Centre-Tioga-Northern Lycoming-Sullivan-
520 AM EDT Sun Aug 18 2019

This Hazardous Weather Outlook is for central Pennsylvania.

.DAY ONE...Today and tonight.

Scattered to numerous late afternoon and early evening showers and
thunderstorms will occur today. A few of the storms will become
strong to severe thunderstorms with gusty winds, locally heavy rain
and frequent lightning.

.DAYS TWO THROUGH SEVEN...Monday through Saturday.

Additional strong to locally severe thunderstorms, containing heavy
rain and gusty winds, will occur each afternoon Monday through
Wednesday.

.SPOTTER INFORMATION STATEMENT...

Spotters are encouraged to report significant hazardous weather.

In the hours before

Local storm report, Aug 18, 2:12 PM EDT, 1 hour 22 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE STATE COLLEGE PA
212 PM EDT SUN AUG 18 2019

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

0136 PM     TSTM WND DMG     RIDGWAY                 41.43N  78.73W
08/18/2019                   ELK                PA   911 CALL CENTER

            MULTIPLE REPORTS OF TREES DOWN ON WIRES INCLUDING ON
            ROCKY ROAD AND AT LAZY RIVER CANOE RENTAL.

&&

EVENT NUMBER CTP1901664

JRB
Local storm report, Aug 18, 2:18 PM EDT, 1 hour 16 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE STATE COLLEGE PA
218 PM EDT SUN AUG 18 2019

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

0120 PM     HAIL             EMPORIUM                41.51N  78.24W
08/18/2019  M1.00 INCH       CAMERON            PA   TRAINED SPOTTER

&&

EVENT NUMBER CTP1901665

JRB
Local storm report, Aug 18, 2:36 PM EDT, 58 minutes before
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Local storm report, Aug 18, 2:38 PM EDT, 56 minutes before
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Local storm report, Aug 18, 3:19 PM EDT, 15 minutes before
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Special weather statement, Aug 18, 3:33 PM EDT, 1 minute before
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The office that day

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

IssuedProductOfficeCountiesLasted
Aug 17, 8:35 PM EDTSpecial Weather StatementCTPCambria25 min
Aug 18, 8:16 AM EDTSpecial Weather StatementCTPWarren44 min
Aug 18, 12:37 PM EDTSpecial Weather StatementCTPMcKean38 min
Aug 18, 12:40 PM EDTSpecial Weather StatementCTPPotter50 min
Aug 18, 12:44 PM EDTSevere Thunderstorm WarningCTPCameron, Elk, McKean76 min
Aug 18, 1:18 PM EDTSpecial Weather StatementCTPCameron42 min
Aug 18, 1:36 PM EDTSevere Thunderstorm WarningCTPCameron, Clinton, Elk, Potter54 min
Aug 18, 1:51 PM EDTSpecial Weather StatementCTPClearfield39 min
Aug 18, 2:02 PM EDTSevere Thunderstorm WarningCTPCameron, Clearfield, Clinton58 min
Aug 18, 2:09 PM EDTSevere Thunderstorm WarningCTPTioga81 min
Aug 18, 2:28 PM EDTSevere Thunderstorm WarningCTPCameron, Clinton, Potter62 min
Aug 18, 2:45 PM EDTSevere Thunderstorm WarningCTPCentre, Clinton, Lycoming60 min
Aug 18, 3:33 PM EDTSpecial Weather StatementCTPCentre12 min
Aug 18, 3:36 PM EDTSpecial Weather StatementCTPCambria24 min
Aug 18, 3:39 PM EDTSpecial Weather StatementCTPSomerset21 min
Aug 18, 3:55 PM EDTSpecial Weather StatementCTPClearfield20 min
Aug 18, 3:58 PM EDTSpecial Weather StatementCTPLycoming, Sullivan32 min
Aug 18, 4:18 PM EDTSpecial Weather StatementCTPLancaster12 min
Aug 18, 4:29 PM EDTSpecial Weather StatementCTPLancaster16 min
Aug 18, 4:33 PM EDTSpecial Weather StatementCTPMontour, Union27 min
Aug 18, 4:34 PM EDTSpecial Weather StatementCTPCentre26 min
Aug 18, 4:43 PM EDTSpecial Weather StatementCTPBedford17 min
Aug 18, 4:44 PM EDTSpecial Weather StatementCTPColumbia16 min
Aug 18, 4:55 PM EDTSpecial Weather StatementCTPBlair35 min
Aug 18, 5:03 PM EDTAreal Flood AdvisoryCTPLancaster117 min
Aug 18, 5:05 PM EDTSpecial Weather StatementCTPColumbia, Montour25 min
Aug 18, 5:06 PM EDTSevere Thunderstorm WarningCTPCentre, Huntingdon, Mifflin24 min
Aug 18, 5:21 PM EDTSpecial Weather StatementCTPMcKean24 min
Aug 18, 5:25 PM EDTSevere Thunderstorm WarningCTPJuniata, Mifflin50 min
Aug 18, 5:31 PM EDTSpecial Weather StatementCTPYork29 min
Aug 18, 5:36 PM EDTSpecial Weather StatementCTPSchuylkill24 min
Aug 18, 5:38 PM EDTSpecial Weather StatementCTPFulton22 min
Aug 18, 5:47 PM EDTSpecial Weather StatementCTPSchuylkill28 min
Aug 18, 6:01 PM EDTSevere Thunderstorm WarningCTPPerry44 min
Aug 18, 6:21 PM EDTSpecial Weather StatementCTPSchuylkill24 min
Aug 18, 6:24 PM EDTSpecial Weather StatementCTPElk21 min
Aug 18, 6:30 PM EDTSpecial Weather StatementCTPFranklin30 min
Aug 18, 6:30 PM EDTSevere Thunderstorm WarningCTPElk44 min
Aug 18, 6:43 PM EDTSpecial Weather StatementCTPSchuylkill32 min
Aug 18, 6:45 PM EDTSpecial Weather StatementCTPCameron15 min
Aug 18, 6:46 PM EDTAreal Flood AdvisoryCTPSchuylkill3 hr
Aug 18, 7:04 PM EDTSpecial Weather StatementCTPCameron26 min
Aug 18, 7:22 PM EDTSpecial Weather StatementCTPLebanon23 min
Aug 18, 7:44 PM EDTSpecial Weather StatementCTPLebanon31 min
Aug 18, 7:53 PM EDTSevere Thunderstorm WarningCTPLancaster, Lebanon55 min

Nearby

Severe Thunderstorm Warnings in Pennsylvania, 2019Every severe thunderstorm warning 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.