Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2010

Severe Thunderstorm Warning 145, NWS State College, PA

July 24, 2010Lycoming County, Pennsylvania

NWS State College, PA issued this severe thunderstorm warning at Jul 24, 2010, 8:35 PM EDT for Lycoming County, Pennsylvania. It was in force for 40 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 24, 2010, 8:35 PM EDT (00:35 UTC)
Expired
Jul 24, 2010, 9:15 PM EDT
In force
40 min
Issued by
NWS State College, PA
Area
Storm-based polygon

County Lycoming County, PA

The radar

The State College radar (KCCX), 92 km from the middle of the area, began a volume at 00:39 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 24, 4:14 PM EDTSevere Thunderstorm WatchSPC6 hr
Jul 24, 6:48 PM EDTTornado WatchSPC4 hr

The nearest sounding before it

Washington/Dulle, VA (KIAD), launched 00:00Z, 0.6 hours before the alert went out and 268 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 2010-07-25Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1790 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 2010-07-25The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 105 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
1790 J/kg
Mixed-layer CIN
-13 J/kg
Mixed-layer LCL
1888 m above ground
0-6 km bulk shear
35 kt
0-1 km storm-relative helicity
105 m²/s²
0-3 km storm-relative helicity
171 m²/s²
Significant tornado parameter
0.1
Supercell composite
5.2

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 24, 7:43 PM EDT, 52 minutes earlier.

Area forecast discussion, Jul 24, 7:43 PM EDT, 52 minutes before
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Hazardous weather outlook, Jul 24, 7:09 PM EDT, 1 hour 26 minutes before
HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE STATE COLLEGE PA
709 PM EDT SAT JUL 24 2010

PAZ005-006-010>012-017-018-037-041-042-251630-
MCKEAN-POTTER-ELK-CAMERON-NORTHERN CLINTON-CLEARFIELD-
NORTHERN CENTRE-TIOGA-NORTHERN LYCOMING-SULLIVAN-
709 PM EDT SAT JUL 24 2010

...TORNADO WATCH 533 IN EFFECT UNTIL 1 AM EDT SUNDAY...

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.

   TORNADO WATCH.

A STALLED FRONTAL BOUNDARY NEAR THE NEW YORK BORDER WILL BE THE
FOCUS FOR THUNDERSTORMS INTO THIS EVENING. SOME STORMS WILL
BE SEVERE WITH DAMAGING WINDS AND HAIL.

.DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY.

THE PROBABILITY FOR WIDESPREAD HAZARDOUS WEATHER IS LOW.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION IS NOT EXPECTED AT THIS TIME.

PAZ004-024-033-251630-
WARREN-CAMBRIA-SOMERSET-
709 PM EDT SAT JUL 24 2010

THIS HAZARDOUS WEATHER OUTLOOK IS FOR CENTRAL PENNSYLVANIA.

.DAY ONE...TONIGHT.

A STALLED FRONTAL BOUNDARY NEAR THE NEW YORK BORDER WILL BE THE
FOCUS FOR THUNDERSTORMS LATER TODAY. A FEW OF THESE STORMS COULD
PRODUCE DAMAGING WIND GUSTS THIS AFTERNOON AND EVENING...ESPECIALLY
ACROSS THE NORTHERN HALF OF THE STATE.

.DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY.

A FEW STORMS MAY BE ON THE STRONG TO SEVERE SIDE ON SUNDAY...
AS A COLD FRONT MOVES SOUTHWARD ACROSS THE STATE.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION IS NOT EXPECTED AT THIS TIME.

PAZ057-059-063>066-251630-
DAUPHIN-LEBANON-CUMBERLAND-ADAMS-YORK-LANCASTER-
709 PM EDT SAT JUL 24 2010

...EXCESSIVE HEAT WARNING IN EFFECT UNTIL 9 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.

   EXCESSIVE HEAT WARNING.

A STALLED FRONTAL BOUNDARY NEAR THE NEW YORK BORDER WILL BE THE
FOCUS FOR THUNDERSTORMS INTO THIS EVENING. SOME STORMS WILL
BE SEVERE WITH DAMAGING WINDS AND HAIL.

.DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY.

A FEW STORMS MAY BE ON THE STRONG TO SEVERE SIDE ON SUNDAY...
AS A COLD FRONT MOVES SOUTHWARD ACROSS THE STATE.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION IS NOT EXPECTED AT THIS TIME.

PAZ019-045-046-049-051>053-058-251630-
SOUTHERN CENTRE-SOUTHERN CLINTON-SOUTHERN LYCOMING-UNION-MONTOUR-
NORTHUMBERLAND-COLUMBIA-SCHUYLKILL-
709 PM EDT SAT JUL 24 2010

...HEAT ADVISORY IN EFFECT UNTIL 9 PM EDT THIS EVENING...
...TORNADO WATCH 533 IN EFFECT UNTIL 1 AM EDT SUNDAY...

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.

   TORNADO WATCH.
   HEAT ADVISORY.

A STALLED FRONTAL BOUNDARY NEAR THE NEW YORK BORDER WILL BE THE
FOCUS FOR THUNDERSTORMS INTO THIS EVENING. SOME STORMS WILL
BE SEVERE WITH DAMAGING WINDS AND HAIL.

.DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY.

A FEW STORMS MAY BE ON THE STRONG TO SEVERE SIDE ON SUNDAY...
AS A COLD FRONT MOVES SOUTHWARD ACROSS THE STATE.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION IS NOT EXPECTED AT THIS TIME.

PAZ025>028-034>036-050-056-251630-
BLAIR-HUNTINGDON-MIFFLIN-JUNIATA-BEDFORD-FULTON-FRANKLIN-SNYDER-
PERRY-
709 PM EDT SAT JUL 24 2010

...HEAT ADVISORY IN EFFECT UNTIL 9 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.

   HEAT ADVISORY.

A STALLED FRONTAL BOUNDARY NEAR THE NEW YORK BORDER WILL BE THE
FOCUS FOR THUNDERSTORMS LATER TODAY. A FEW OF THESE STORMS COULD
PRODUCE DAMAGING WIND GUSTS THIS AFTERNOON AND EVENING...ESPECIALLY
ACROSS THE NORTHERN HALF OF THE STATE.

.DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY.

A FEW STORMS MAY BE ON THE STRONG TO SEVERE SIDE ON SUNDAY...
AS A COLD FRONT MOVES SOUTHWARD ACROSS THE STATE.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION IS NOT EXPECTED AT THIS TIME.

MARTIN

In the hours before

Local storm report, Jul 24, 7:02 PM EDT, 1 hour 33 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE STATE COLLEGE PA
702 PM EDT SAT JUL 24 2010

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

0645 PM     TSTM WND DMG     4 S BRADFORD            41.90N 78.64W
07/24/2010                   MCKEAN             PA   EMERGENCY MNGR

            TREES AND WIRES DOWN ON MINARD RUN ROAD NEAR CUSTER CITY
            AT 650 PM

0645 PM     TSTM WND DMG     4 S BRADFORD            41.90N 78.64W
07/24/2010                   MCKEAN             PA   EMERGENCY MNGR

            TREES AND WIRES DOWN ON MINARD ROAD NEAR CUSTER CITY

&&

PAH
Local storm report, Jul 24, 7:07 PM EDT, 1 hour 28 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE STATE COLLEGE PA
707 PM EDT SAT JUL 24 2010

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

0650 PM     HAIL             6 S ULYSSES             41.82N 77.76W
07/24/2010  M1.25 INCH       POTTER             PA   TRAINED SPOTTER

            HAIL THE SIZE OF KENNEDY HALF DOLLARS ACCOMPANIED 0.76
            INCHES OF RAIN

&&

PAH
Local storm report, Jul 24, 7:31 PM EDT, 1 hour 4 minutes before
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Special weather statement, Jul 24, 8:03 PM EDT, 32 minutes before
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Local storm report, Jul 24, 8:12 PM EDT, 23 minutes before
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Local storm report, Jul 24, 8:21 PM EDT, 14 minutes before
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The office that day

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

IssuedProductOfficeCountiesLasted
Jul 24, 8:03 PM EDTSpecial Weather StatementCTPClinton42 min
Jul 24, 8:14 PM EDTSevere Thunderstorm WarningCTPCameron, Clearfield, Elk76 min
Jul 24, 8:18 PM EDTSevere Thunderstorm WarningCTPClinton, Lycoming42 min
Jul 24, 8:57 PM EDTSevere Thunderstorm WarningCTPCentre, Clinton, Columbia, Lycoming, Montour, Northumberland and 2 more78 min
Jul 24, 9:07 PM EDTSpecial Weather StatementCTPClearfield23 min
Jul 24, 9:45 PM EDTSevere Thunderstorm WarningCTPClearfield29 min
Jul 24, 9:59 PM EDTSevere Thunderstorm WarningCTPSchuylkill46 min
Jul 24, 10:10 PM EDTSpecial Weather StatementCTPClearfield35 min
Jul 24, 10:32 PM EDTSpecial Weather StatementCTPJuniata, Mifflin, Snyder43 min
Jul 24, 11:16 PM EDTSpecial Weather StatementCTPDauphin14 min
Jul 24, 11:35 PM EDTSpecial Weather StatementCTPDauphin25 min
Jul 24, 11:57 PM EDTSpecial Weather StatementCTPLebanon33 min
Jul 25, 8:34 AM EDTSpecial Weather StatementCTPMcKean56 min
Jul 25, 8:35 AM EDTSpecial Weather StatementCTPWarren55 min
Jul 25, 8:41 AM EDTAreal Flood AdvisoryCTPMcKean, Warren3 hr
Jul 25, 9:27 AM EDTSpecial Weather StatementCTPPotter, Tioga63 min
Jul 25, 9:35 AM EDTSpecial Weather StatementCTPWarren55 min
Jul 25, 9:46 AM EDTSpecial Weather StatementCTPMcKean59 min
Jul 25, 10:24 AM EDTSpecial Weather StatementCTPCameron, Elk, McKean66 min
Jul 25, 10:28 AM EDTSpecial Weather StatementCTPTioga62 min
Jul 25, 10:35 AM EDTSevere Thunderstorm WarningCTPColumbia, Lycoming, Montour, Northumberland, Potter, Sullivan and 1 more55 min
Jul 25, 10:41 AM EDTSpecial Weather StatementCTPPotter64 min
Jul 25, 11:19 AM EDTSpecial Weather StatementCTPCambria26 min
Jul 25, 11:42 AM EDTSevere Thunderstorm WarningCTPCameron, Clinton, Lycoming, Potter63 min
Jul 25, 11:50 AM EDTSevere Thunderstorm WarningCTPBedford, Blair, Cambria, Fulton, Huntingdon, Somerset55 min
Jul 25, 12:06 PM EDTSevere Thunderstorm WarningCTPBedford, Somerset54 min
Jul 25, 12:29 PM EDTSevere Thunderstorm WarningCTPCumberland, Dauphin, Lebanon, Perry61 min
Jul 25, 12:37 PM EDTAreal Flood AdvisoryCTPBedford, Blair, Cambria, Franklin, Fulton, Huntingdon and 4 more3 hr
Jul 25, 12:44 PM EDTSevere Thunderstorm WarningCTPCentre, Clinton, Lycoming, Union46 min
Jul 25, 12:46 PM EDTSevere Thunderstorm WarningCTPBedford, Cumberland, Franklin, Fulton, Huntingdon, Juniata and 3 more59 min
Jul 25, 1:03 PM EDTTornado WarningCTPDauphin, Lancaster27 min
Jul 25, 1:15 PM EDTSevere Thunderstorm WarningCTPLancaster, Lebanon60 min
Jul 25, 1:22 PM EDTSevere Thunderstorm WarningCTPColumbia, Montour, Northumberland, Schuylkill, Snyder, Union38 min
Jul 25, 1:28 PM EDTSevere Thunderstorm WarningCTPAdams, Cumberland, Franklin, Lebanon, York77 min
Jul 25, 1:38 PM EDTSevere Thunderstorm WarningCTPLancaster, York52 min
Jul 25, 1:54 PM EDTSpecial Weather StatementCTPSchuylkill51 min
Jul 25, 2:06 PM EDTTornado WarningCTPYork24 min
Jul 25, 2:33 PM EDTSevere Thunderstorm WarningCTPLancaster, York42 min
Jul 25, 2:38 PM EDTAreal Flood AdvisoryCTPAdams, Lancaster, York3 hr

Nearby

Severe Thunderstorm Warnings in Pennsylvania, 2010Every severe thunderstorm warning in 2010

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.