Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2014

Severe Thunderstorm Warning 108, NWS State College, PA

July 13, 20144 counties in Pennsylvania

NWS State College, PA issued this severe thunderstorm warning at Jul 13, 2014, 8:10 PM EDT for 4 counties in Pennsylvania. It was in force for 80 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
Jul 13, 2014, 8:10 PM EDT (00:10 UTC)
Expired
Jul 13, 2014, 9:30 PM EDT
In force
80 min
Issued by
NWS State College, PA
Area
Storm-based polygon

Counties Adams County, PA, Cumberland County, PA, Franklin County, PA, York County, PA

The radar

The Sterling radar (KLWX), 113 km from the middle of the area, began a volume at 00:14 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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

IssuedProductOfficeLasted
Jul 13, 4:06 PM EDTSevere Thunderstorm WatchSPC6 hr

The nearest sounding before it

Washington/Dulle, VA (KIAD), launched 00:00Z, 0.2 hours before the alert went out and 114 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, Washington/Dulle, VA at 00:00Z on 2014-07-14Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 569 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, Washington/Dulle, VA at 00:00Z on 2014-07-14The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 94 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
569 J/kg
Mixed-layer CIN
-52 J/kg
Mixed-layer LCL
1600 m above ground
0-6 km bulk shear
28 kt
0-1 km storm-relative helicity
94 m²/s²
0-3 km storm-relative helicity
172 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

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 Jul 13, 7:20 PM EDT, 50 minutes earlier.

Area forecast discussion, Jul 13, 7:20 PM EDT, 50 minutes before
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Hazardous weather outlook, Jul 13, 7:58 PM EDT, 12 minutes before
HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE STATE COLLEGE PA
758 PM EDT SUN JUL 13 2014

PAZ024>028-033>036-041-042-046-049>053-056>059-063>066-150000-
CAMBRIA-BLAIR-HUNTINGDON-MIFFLIN-JUNIATA-SOMERSET-BEDFORD-FULTON-
FRANKLIN-NORTHERN LYCOMING-SULLIVAN-SOUTHERN LYCOMING-UNION-SNYDER-
MONTOUR-NORTHUMBERLAND-COLUMBIA-PERRY-DAUPHIN-SCHUYLKILL-LEBANON-
CUMBERLAND-ADAMS-YORK-LANCASTER-
758 PM EDT SUN JUL 13 2014

...SEVERE THUNDERSTORM WATCH 414 IN EFFECT UNTIL 11 PM EDT THIS
EVENING...

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.

   SEVERE THUNDERSTORM WATCH.

.DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY.

SCATTERED STRONG TO SEVERE THUNDERSTORMS ARE POSSIBLE AGAIN MONDAY
AFTERNOON AND EVENING AS A WAVE OF SURFACE LOW PRESSURE AND UPPER
AIR DISTURBANCE MOVES EAST ACROSS THE REGION.

.SPOTTER INFORMATION STATEMENT...

WEATHER SPOTTERS ARE ENCOURAGED TO REPORT SIGNIFICANT WEATHER
CONDITIONS ACCORDING TO STANDARD OPERATING PROCEDURES.

PAZ012-017>019-045-150000-
NORTHERN CLINTON-CLEARFIELD-NORTHERN CENTRE-SOUTHERN CENTRE-
SOUTHERN CLINTON-
758 PM EDT SUN JUL 13 2014

THIS HAZARDOUS WEATHER OUTLOOK IS FOR CENTRAL PENNSYLVANIA.

.DAY ONE...TONIGHT.

THE PROBABILITY OF WIDESPREAD HAZARDOUS WEATHER IS LOW.

.DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY.

SCATTERED STRONG TO SEVERE THUNDERSTORMS ARE POSSIBLE AGAIN MONDAY
AFTERNOON AND EVENING AS A WAVE OF SURFACE LOW PRESSURE AND UPPER
AIR DISTURBANCE MOVES EAST ACROSS THE REGION.

.SPOTTER INFORMATION STATEMENT...

WEATHER SPOTTERS ARE ENCOURAGED TO REPORT SIGNIFICANT WEATHER
CONDITIONS ACCORDING TO STANDARD OPERATING PROCEDURES.

PAZ004>006-010-011-037-150000-
WARREN-MCKEAN-POTTER-ELK-CAMERON-TIOGA-
758 PM EDT SUN JUL 13 2014

THIS HAZARDOUS WEATHER OUTLOOK IS FOR CENTRAL PENNSYLVANIA.

.DAY ONE...TONIGHT.

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY.

THE PROBABILITY OF WIDESPREAD HAZARDOUS WEATHER IS LOW.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION IS NOT EXPECTED AT THIS TIME.

LAMBERT

In the hours before

Local storm report, Jul 13, 6:20 PM EDT, 1 hour 50 minutes before
PRELIMINARY LOCAL STORM REPORT...SUMMARY
NATIONAL WEATHER SERVICE STATE COLLEGE PA
620 PM EDT SUN JUL 13 2014

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

0510 PM     TSTM WND DMG     JOHNSTOWN               40.33N  78.92W
07/13/2014                   CAMBRIA            PA   911 CALL CENTER

            TREES AND WIRES DOWN IN THE CITY

0512 PM     HAIL             JOHNSTOWN               40.33N  78.92W
07/13/2014  E0.88 INCH       CAMBRIA            PA   PUBLIC

0603 PM     HAIL             CHICKAREE               40.45N  78.88W
07/13/2014  E1.00 INCH       CAMBRIA            PA   PUBLIC

&&

EVENT NUMBER CTP1400244 CTP1400245 CTP1400246

COLBERT
Local storm report, Jul 13, 7:01 PM EDT, 1 hour 9 minutes before
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Local storm report, Jul 13, 7:35 PM EDT, 35 minutes before
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Local storm report, Jul 13, 7:41 PM EDT, 29 minutes before
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Special weather statement, Jul 13, 7:43 PM EDT, 27 minutes before
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Special weather statement, Jul 13, 7:52 PM EDT, 18 minutes before
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The office that day

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

IssuedProductOfficeCountiesLasted
Jul 13, 8:01 PM EDTSevere Thunderstorm WarningCTPDauphin, Lebanon, Perry59 min
Jul 13, 8:32 PM EDTSevere Thunderstorm WarningCTPDauphin, Schuylkill58 min
Jul 13, 8:53 PM EDTAreal Flood AdvisoryCTPCumberland, Dauphin, Perry, York3 hr
Jul 13, 8:59 PM EDTSevere Thunderstorm WarningCTPCumberland, Dauphin, Lancaster, Lebanon, York61 min
Jul 14, 3:42 AM EDTFlash Flood WatchCTPAdams, Cumberland, Dauphin, Franklin, Lancaster, Lebanon and 3 more17 hr
Jul 14, 12:59 PM EDTSpecial Weather StatementCTPBlair, Cambria, Huntingdon, Mifflin76 min
Jul 14, 1:39 PM EDTAreal Flood AdvisoryCTPBedford, Blair, Cambria, Somerset111 min
Jul 14, 1:45 PM EDTSpecial Weather StatementCTPAdams45 min
Jul 14, 1:59 PM EDTAreal Flood AdvisoryCTPHuntingdon2 hr
Jul 14, 2:01 PM EDTSpecial Weather StatementCTPPerry44 min
Jul 14, 2:39 PM EDTSpecial Weather StatementCTPDauphin36 min
Jul 14, 2:45 PM EDTSevere Thunderstorm WarningCTPDauphin, Lebanon, Perry45 min
Jul 14, 3:13 PM EDTSpecial Weather StatementCTPLebanon47 min
Jul 14, 4:08 PM EDTSpecial Weather StatementCTPLancaster37 min
Jul 14, 4:25 PM EDTSpecial Weather StatementCTPAdams, Cumberland, Franklin35 min
Jul 14, 5:40 PM EDTAreal Flood AdvisoryCTPAdams, Cumberland, Dauphin, Franklin, Lancaster, Lebanon and 1 more3 hr
Jul 14, 6:51 PM EDTFlash Flood WarningCTPLancaster, York3 hr

Nearby

Severe Thunderstorm Warnings in Pennsylvania, 2014Every severe thunderstorm warning in 2014

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.