Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2013

Severe Thunderstorm Warning 17, NWS State College, PA

April 10, 20134 counties in Pennsylvania

NWS State College, PA issued this severe thunderstorm warning at Apr 10, 2013, 10:11 PM EDT for 4 counties in Pennsylvania. It was in force for 64 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: Apr 10, 2013, 10:11 PM EDT (02:11 UTC)
Expired: Apr 10, 2013, 11:15 PM EDT
In force: 64 min
Issued by: NWS State College, PA
Area: Storm-based polygon

Counties Bedford County, PA, Blair County, PA, Cambria County, PA, Somerset County, PA

The radar

The State College radar (KCCX), 93 km from the middle of the area, began a volume at 02:12 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.

Issued	Product	Office	Lasted
Apr 10, 6:13 PM EDT	Severe Thunderstorm Watch	SPC	5 hr

The nearest sounding before it

Pittsburgh, PA (KPIT), launched 00:00Z, 2.2 hours before the alert went out and 125 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: 173 J/kg
Mixed-layer CIN: -144 J/kg
Mixed-layer LCL: 1067 m above ground
0-6 km bulk shear: 55 kt
0-1 km storm-relative helicity: 8 m²/s²
0-3 km storm-relative helicity: 103 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 3.0

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 Apr 10, 9:19 PM EDT, 52 minutes earlier.

Area forecast discussion, Apr 10, 9:19 PM EDT, 52 minutes before

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Hazardous weather outlook, Apr 10, 9:46 PM EDT, 25 minutes before

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In the hours before

Special weather statement, Apr 10, 4:33 PM EDT, 5 hours 38 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE STATE COLLEGE PA
433 PM EDT WED APR 10 2013

PAZ012-017>019-024>027-045-102100-
BLAIR PA-CAMBRIA PA-CLEARFIELD PA-HUNTINGDON PA-MIFFLIN PA-
NORTHERN CENTRE PA-NORTHERN CLINTON PA-SOUTHERN CENTRE PA-
SOUTHERN CLINTON PA-
433 PM EDT WED APR 10 2013

...A LINE OF STRONG THUNDERSTORMS WILL AFFECT CENTRAL MIFFLIN...
CENTRE...EASTERN CLEARFIELD...NORTHEASTERN CAMBRIA...NORTHERN
BLAIR...NORTHERN HUNTINGDON AND SOUTHWESTERN CLINTON COUNTIES...

AT 430 PM EDT...A LINE OF STRONG THUNDERSTORMS WAS LOCATED FROM
CLEARFIELD TO 15 MILES NORTH OF TYRONE TO ALTOONA...MOVING EAST AT 50
MPH.

WIND GUSTS TO 50 MPH AND SMALL HAIL ARE POSSIBLE WITH THESE STORMS.
THESE STORMS WILL AFFECT UNIONVILLE...KEATING AND MCALEVYS FORT.

LOCATIONS AFFECTED INCLUDE PHILIPSBURG...SNOW SHOE...STATE
COLLEGE...BELLEFONTE AND BEECH CREEK.

THIS WILL IMPACT THE FOLLOWING CENTRAL PENNSYLVANIA INTERSTATES...
I-80 BETWEEN MILE MARKERS 123 AND 174...I-99 BETWEEN MILE MARKERS 36
AND 85.

THIS WILL ALSO IMPACT THE FOLLOWING MAJOR ROADS...ROUTE 22...ROUTE
220...ALTERNATE ROUTE 220...ROUTE 322...STATE ROAD 26...STATE ROAD
45...STATE ROAD 350...STATE ROAD 453.

LAT...LON 4089 7828 4124 7849 4122 7809 4126 7806
      4126 7765 4091 7742 4054 7776 4051 7862

FORECASTER: DEVOIR/JUNG

Special weather statement, Apr 10, 4:57 PM EDT, 5 hours 14 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE STATE COLLEGE PA
457 PM EDT WED APR 10 2013

PAZ026>028-050-056-057-102145-
DAUPHIN PA-HUNTINGDON PA-JUNIATA PA-MIFFLIN PA-PERRY PA-SNYDER PA-
457 PM EDT WED APR 10 2013

...A LINE OF STRONG THUNDERSTORMS WILL AFFECT JUNIATA...MIFFLIN...
NORTHEASTERN HUNTINGDON...NORTHERN PERRY...NORTHWESTERN DAUPHIN AND
SOUTHERN SNYDER COUNTIES...

AT 453 PM EDT...A LINE OF STRONG THUNDERSTORMS WAS LOCATED FROM
MILROY TO ALLENSVILLE...MOVING EAST AT 60 MPH.

INTENSE LIGHTNING...WIND GUSTS TO 40 MPH AND PEA SIZE HAIL ARE
POSSIBLE WITH THESE STORMS. MOVE INDOORS WHEN A THUNDERSTORM
APPROACHES.

THESE STORMS WILL AFFECT MCCLURE...LIVERPOOL AND SHERMANSDALE.

LAT...LON 4060 7795 4075 7765 4081 7747 4064 7694
      4060 7692 4062 7689 4060 7679 4033 7715

FORECASTER: DEVOIR

Local storm report, Apr 10, 5:26 PM EDT, 4 hours 45 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE STATE COLLEGE PA
526 PM EDT WED APR 10 2013

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

0425 PM     TSTM WND DMG     MONTOURSVILLE           41.25N  76.92W
04/10/2013                   LYCOMING           PA   TRAINED SPOTTER

            NUMEROUS TREES REPORTED DOWN JUST NORTH OF
            MONTOURSVILLE.

&&

EVENT NUMBER CTP1300012

EVANEGO

Special weather statement, Apr 10, 6:32 PM EDT, 3 hours 39 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE STATE COLLEGE PA
632 PM EDT WED APR 10 2013

PAZ057>059-066-102315-
DAUPHIN PA-LANCASTER PA-LEBANON PA-SCHUYLKILL PA-
632 PM EDT WED APR 10 2013

...STRONG THUNDERSTORMS WILL AFFECT CENTRAL
DAUPHIN...LEBANON...NORTHEASTERN LANCASTER AND SOUTHERN SCHUYLKILL
COUNTIES...

AT 627 PM EDT...A STRONG THUNDERSTORM WAS NEAR FORT INDIANTOWN GAP...
MOVING EAST AT 50 MPH.

WIND GUSTS TO 50 MPH ARE POSSIBLE WITH THESE STORMS. THESE STORMS
WILL AFFECT FREDERICKSBURG...MYERSTOWN...ADAMSTOWN AND CHURCHTOWN.

OTHER LOCATIONS AFFECTED INCLUDE PENN STATE SCHUYLKILL.

THIS WILL IMPACT THE FOLLOWING CENTRAL PENNSYLVANIA INTERSTATES...THE
PENNSYLVANIA TURNPIKE BETWEEN MILE MARKERS 269 AND 295...I-78 BETWEEN
MILE MARKERS 0 AND 8...I-81 BETWEEN MILE MARKERS 75 AND 114.

THIS WILL ALSO IMPACT THE FOLLOWING MAJOR ROADS...ROUTE 22...ROUTE
209...ROUTE 222...ROUTE 322...ROUTE 422...STATE ROAD 61...STATE ROAD
501.

LAT...LON 4011 7593 4010 7594 4040 7701 4071 7632
      4063 7599 4058 7602 4058 7606 4051 7626
      4051 7634 4049 7643 4037 7623 4036 7620
      4015 7588 4013 7587

FORECASTER: EVANEGO

Local storm report, Apr 10, 8:19 PM EDT, 1 hour 52 minutes before

PRELIMINARY LOCAL STORM REPORT...SUMMARY
NATIONAL WEATHER SERVICE STATE COLLEGE PA
819 PM EDT WED APR 10 2013

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

0607 PM     TSTM WND DMG     SMETHPORT               41.81N  78.44W
04/10/2013                   MCKEAN             PA   911 CALL CENTER

            POWER POLES AND WIRES DOWN ON RTE 46

0715 PM     TSTM WND DMG     CLEARFIELD              41.02N  78.44W
04/10/2013                   CLEARFIELD         PA   911 CALL CENTER

            NUMEROUS TREES DOWN ACROSS CLEARFIELD COUNTY.

0750 PM     TSTM WND GST     STATE COLLEGE           40.79N  77.86W
04/10/2013  M64 MPH          CENTRE             PA   NWS OFFICE

            SEVERAL GUSTS OVER 60 MPH OVER ABOUT A 10 MINUTE PERIOD
            AS THE STORM MOVED THROUGH

&&

EVENT NUMBER CTP1300013 CTP1300014 CTP1300015

EVANEGO

Local storm report, Apr 10, 9:43 PM EDT, 28 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
Apr 10, 8:04 PM EDT	Severe Thunderstorm Warning	CTP	Centre, Clinton, Huntingdon, Juniata, Lycoming, Mifflin and 2 more	41 min
Apr 10, 8:30 PM EDT	Severe Thunderstorm Warning	CTP	Columbia, Cumberland, Dauphin, Juniata, Lebanon, Northumberland and 5 more	60 min
Apr 10, 9:14 PM EDT	Severe Thunderstorm Warning	CTP	Dauphin, Lancaster, Lebanon	46 min
Apr 11, 1:37 PM EDT	Flood Watch	CTP	Cameron, Clearfield, Elk, McKean, Potter, Warren	15 hr

Nearby

Severe Thunderstorm Warnings in Pennsylvania, 2013 Every severe thunderstorm warning in 2013

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.