Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2010

Severe Thunderstorm Warning 26, NWS State College, PA

May 8, 20105 counties in Pennsylvania

NWS State College, PA issued this severe thunderstorm warning at May 8, 2010, 2:40 AM EDT for 5 counties in Pennsylvania. It was in force for 35 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: May 8, 2010, 2:40 AM EDT (06:40 UTC)
Expired: May 8, 2010, 3:15 AM EDT
In force: 35 min
Issued by: NWS State College, PA
Area: Storm-based polygon

Counties Blair County, PA, Cambria County, PA, Centre County, PA, Clearfield County, PA, Huntingdon County, PA

The radar

The State College radar (KCCX), 37 km from the middle of the area, began a volume at 06:42 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
May 7, 9:31 PM EDT	Severe Thunderstorm Watch	SPC	5 hr

The nearest sounding before it

Pittsburgh, PA (KPIT), launched 00:00Z, 6.7 hours before the alert went out and 157 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: 50 J/kg
Mixed-layer CIN: -172 J/kg
Mixed-layer LCL: 2231 m above ground
0-6 km bulk shear: 57 kt
0-1 km storm-relative helicity: 242 m²/s²
0-3 km storm-relative helicity: 535 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.2

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 May 8, 2:08 AM EDT, 32 minutes earlier.

Area forecast discussion, May 8, 2:08 AM EDT, 32 minutes before

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Hazardous weather outlook, May 8, 1:13 AM EDT, 1 hour 27 minutes before

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In the hours before

Special weather statement, May 8, 12:43 AM EDT, 1 hour 57 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE STATE COLLEGE PA
1243 AM EDT SAT MAY 8 2010

PAZ006-010>012-037-041-080530-
CAMERON PA-ELK PA-NORTHERN CLINTON PA-NORTHERN LYCOMING PA-POTTER PA-
TIOGA PA-
1243 AM EDT SAT MAY 8 2010

...A LINE OF STRONG THUNDERSTORMS WILL AFFECT THE COUNTIES OF
CAMERON...NORTHWESTERN CLINTON...NORTHWESTERN LYCOMING...
POTTER...SOUTHEASTERN ELK AND TIOGA THROUGH 130 AM EDT...

AT 1236 AM EDT...A LINE OF STRONG THUNDERSTORMS WAS LOCATED FROM
GENESEE...SOUTHWEST TO NEAR AUSTIN...SAINT MARYS AND BROOKVILLE...
MOVING EAST AT 65 MPH.

WIND GUSTS TO 50 MPH AND SMALL HAIL ARE POSSIBLE WITH SOME OF THE
STORMS IN THE LINE. ALSO EXPECT FREQUENT...DANGEROUS CLOUD TO GROUND
LIGHTNING FROM THESE STORMS. DO NOT STAY IN THE OPEN NOR SEEK
SHELTER UNDER TREES WHEN LIGHTNING THREATENS...MOVE INDOORS WHEN A
THUNDERSTORM APPROACHES.

THESE STORMS WILL BE NEAR BROCKPORT AROUND 1250 AM...GALETON AROUND
100 AM...MEDIX RUN AROUND 110 AM...TAMARACK AROUND 120 AM AND CEDAR
RUN AROUND 130 AM.

THIS WILL IMPACT THE FOLLOWING MAJOR ROADS...ROUTE 6...ROUTE 15...
ROUTE 219...STATE ROAD 120...STATE ROAD 255...STATE ROAD 449.

LAT...LON 4172 7712 4151 7746 4130 7799 4124 7842
      4125 7864 4122 7865 4121 7872 4123 7875
      4127 7875 4131 7884 4161 7818 4200 7781
      4200 7703

EXPERIMENTAL

FORECASTER: LAMBERT

Special weather statement, May 8, 1:35 AM EDT, 1 hour 5 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE STATE COLLEGE PA
135 AM EDT SAT MAY 8 2010

PAZ006-010>012-080615-
CAMERON PA-ELK PA-NORTHERN CLINTON PA-POTTER PA-
135 AM EDT SAT MAY 8 2010

...A STRONG THUNDERSTORM WILL AFFECT CAMERON...ELK...NORTHWESTERN
CLINTON AND SOUTHERN POTTER COUNTIES THROUGH 215 AM EDT...

AT 132 AM EDT...A STRONG THUNDERSTORM WAS 12 MILES NORTHEAST OF
BROOKVILLE...MOVING EAST AT 65 MPH.

WIND GUSTS TO 50 MPH ARE POSSIBLE WITH THIS STORM. EXPECT
FREQUENT...DANGEROUS CLOUD TO GROUND LIGHTNING FROM THIS STORM. DO
NOT STAY IN THE OPEN NOR SEEK SHELTER UNDER TREES WHEN LIGHTNING
THREATENS...MOVE INDOORS WHEN A THUNDERSTORM APPROACHES.

THIS STORM WILL BE NEAR BRANDY CAMP AROUND 140 AM...ST. MARYS AROUND
150 AM...TRUMAN AROUND 200 AM...CAMERON AROUND 210 AM AND WHARTON
AROUND 220 AM.

THIS WILL IMPACT THE FOLLOWING MAJOR ROADS...ROUTE 219...STATE ROAD
120...STATE ROAD 255.

LAT...LON 4130 7769 4124 7842 4125 7864 4122 7865
      4122 7872 4123 7875 4127 7875 4137 7896
      4136 7901 4145 7903 4144 7897 4152 7897
      4167 7776

EXPERIMENTAL

FORECASTER: LAMBERT

Special weather statement, May 8, 1:54 AM EDT, 46 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE STATE COLLEGE PA
154 AM EDT SAT MAY 8 2010

PAZ010>012-017-018-080630-
CAMERON PA-CLEARFIELD PA-ELK PA-NORTHERN CENTRE PA-
NORTHERN CLINTON PA-
154 AM EDT SAT MAY 8 2010

...A LINE OF STRONG THUNDERSTORMS WILL AFFECT CLEARFIELD...
NORTHWESTERN CENTRE...SOUTHEASTERN CAMERON...SOUTHEASTERN ELK AND
WEST CENTRAL CLINTON COUNTIES THROUGH 230 AM EDT...

AT 151 AM EDT...A LINE OF STRONG THUNDERSTORMS WAS LOCATED FROM
PENFIELD...SOUTH TO ROCKTON AND BURNSIDE...MOVING EAST AT 65 MPH.

WIND GUSTS TO 50 MPH ARE POSSIBLE WITH THESE STORMS. EXPECT INTENSE
LIGHTNING FROM THESE STORMS. DO NOT STAY IN THE OPEN NOR SEEK SHELTER
UNDER TREES WHEN LIGHTNING THREATENS...MOVE INDOORS WHEN A
THUNDERSTORM APPROACHES. THESE STORMS WILL BE NEAR CURWENSVILLE
AROUND 200 AM...WOODLAND AROUND 205 AM...WALLACETON AROUND 210 AM...
PINE GLEN AROUND 215 AM AND RENOVO AROUND 220 AM.

THIS WILL IMPACT I-80 BETWEEN MILE MARKERS 106 AND 149.

THIS WILL ALSO IMPACT THE FOLLOWING MAJOR ROADS...ROUTE 219...ROUTE
322...STATE ROAD 120...STATE ROAD 153...STATE ROAD 255...STATE ROAD
350.

LAT...LON 4129 7850 4136 7766 4091 7796 4082 7881
      4085 7881

EXPERIMENTAL

FORECASTER: LAMBERT

Special weather statement, May 8, 1:59 AM EDT, 41 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE STATE COLLEGE PA
159 AM EDT SAT MAY 8 2010

PAZ012-018-037-041-042-045-046-049-052-080645-
NORTHERN CENTRE PA-NORTHERN CLINTON PA-NORTHERN LYCOMING PA-
NORTHUMBERLAND PA-SOUTHERN CLINTON PA-SOUTHERN LYCOMING PA-
SULLIVAN PA-TIOGA PA-UNION PA-
159 AM EDT SAT MAY 8 2010

...A LINE OF STRONG THUNDERSTORMS WILL AFFECT CENTRAL CLINTON...
LYCOMING...NORTH CENTRAL CENTRE...NORTHEASTERN UNION...NORTHWESTERN
NORTHUMBERLAND...SOUTHERN TIOGA AND WESTERN SULLIVAN COUNTIES
THROUGH 245 AM EDT...

AT 156 AM EDT...A LINE OF STRONG THUNDERSTORMS WAS LOCATED FROM
CEDAR RUN...TO 7 MILES NORTHWEST OF HOWARD...MOVING EAST
AT 70 MPH.

WIND GUSTS TO 50 MPH ARE POSSIBLE WITH THESE STORMS. EXPECT
FREQUENT...DANGEROUS CLOUD TO GROUND LIGHTNING FROM THESE STORMS. DO
NOT STAY IN THE OPEN NOR SEEK SHELTER UNDER TREES WHEN LIGHTNING
THREATENS...MOVE INDOORS WHEN A THUNDERSTORM APPROACHES. THESE
STORMS WILL BE NEAR WATERVILLE...LITTLE PINE STATE
PARK...CAMMAL...AND MILL HALL AROUND 205 AM...ENGLISH
CENTER...BUTTONWOOD...MCELHATTAN...AND LOCK HAVEN AROUND 210
AM...OGDENSBURG AND TROUT RUN AROUND 215 AM.

THIS WILL IMPACT THE FOLLOWING CENTRAL PENNSYLVANIA INTERSTATES...
I-80 BETWEEN MILE MARKERS 178 AND 208...I-180 BETWEEN MILE MARKERS 2
AND 29.

THIS WILL ALSO IMPACT THE FOLLOWING MAJOR ROADS...ROUTE 15...ROUTE
220...STATE ROAD 14...STATE ROAD 118...STATE ROAD 120.

LAT...LON 4163 7688 4161 7688 4156 7638 4116 7670
      4117 7674 4106 7678 4106 7756 4109 7763
      4106 7769 4105 7786 4164 7747

EXPERIMENTAL

FORECASTER: LAMBERT

Special weather statement, May 8, 2:10 AM EDT, 30 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE STATE COLLEGE PA
210 AM EDT SAT MAY 8 2010

PAZ017>019-024-025-080645-
BLAIR PA-CAMBRIA PA-CLEARFIELD PA-NORTHERN CENTRE PA-
SOUTHERN CENTRE PA-
210 AM EDT SAT MAY 8 2010

...A STRONG THUNDERSTORM WILL AFFECT NORTHEASTERN BLAIR...
NORTHEASTERN CAMBRIA...SOUTHERN CLEARFIELD AND SOUTHWESTERN CENTRE
COUNTIES THROUGH 245 AM EDT...

AT 205 AM EDT...A STRONG THUNDERSTORM WAS 14 MILES SOUTHEAST OF
PUNXSUTAWNEY...OR 3 MILES SOUTHWEST OF BURNSIDE...MOVING EAST AT 70
MPH.

WIND GUSTS TO 50 MPH ARE POSSIBLE WITH THIS STORM. THIS STORM WILL BE
NEAR GLEN HOPE AROUND 220 AM...HOUTZDALE AROUND 230 AM...BLACK
MOSHANNON STATE PARK AROUND 240 AM AND UNIONVILLE AROUND 250 AM.

THIS WILL IMPACT I-99 BETWEEN MILE MARKERS 52 AND 75.

THIS WILL ALSO IMPACT THE FOLLOWING MAJOR ROADS...ROUTE 219...ROUTE
220...ALTERNATE ROUTE 220...ROUTE 322...STATE ROAD 26...STATE ROAD
45...STATE ROAD 350.

LAT...LON 4087 7881 4096 7784 4074 7781 4072 7805
      4074 7812 4072 7814 4071 7819 4065 7883

EXPERIMENTAL

FORECASTER: LAMBERT

Special weather statement, May 8, 2:27 AM EDT, 13 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
May 7, 10:26 PM EDT	Special Weather Statement	CTP	Warren	49 min
May 7, 10:46 PM EDT	Severe Thunderstorm Warning	CTP	McKean, Warren	59 min
May 7, 11:48 PM EDT	Special Weather Statement	CTP	Cameron, Elk, McKean, Potter	57 min
May 8, 12:43 AM EDT	Special Weather Statement	CTP	Cameron, Potter, Tioga	47 min
May 8, 1:35 AM EDT	Special Weather Statement	CTP	Cameron, Elk	40 min
May 8, 1:54 AM EDT	Special Weather Statement	CTP	Clearfield	36 min
May 8, 1:59 AM EDT	Special Weather Statement	CTP	Clinton, Lycoming, Sullivan	46 min
May 8, 2:10 AM EDT	Special Weather Statement	CTP	Centre	35 min
May 8, 2:27 AM EDT	Special Weather Statement	CTP	Blair, Cambria	48 min
May 8, 3:06 AM EDT	Special Weather Statement	CTP	Cambria	9 min
May 8, 2:24 PM EDT	Freeze Watch	CTP	Bedford, Blair, Cambria, Cameron, Centre, Clearfield and 17 more	14 hr
May 8, 3:48 PM EDT	Special Weather Statement	CTP	Centre, Clinton, Lycoming, Mifflin, Sullivan, Union	27 min
May 8, 3:50 PM EDT	Special Weather Statement	CTP	Cameron	25 min

Nearby

Severe Thunderstorm Warnings in Pennsylvania, 2010 Every 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.