Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2010

Severe Thunderstorm Warning 159, NWS State College, PA

July 25, 2010Lancaster County, York County, Pennsylvania

NWS State College, PA issued this severe thunderstorm warning at Jul 25, 2010, 1:38 PM EDT for Lancaster County, York County, Pennsylvania. It was in force for 52 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 25, 2010, 1:38 PM EDT (17:38 UTC)
Expired: Jul 25, 2010, 2:30 PM EDT
In force: 52 min
Issued by: NWS State College, PA
Area: Storm-based polygon

Counties Lancaster County, PA, York County, PA

The radar

The Sterling radar (KLWX), 141 km from the middle of the area, began a volume at 17:38 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
Jul 25, 11:29 AM EDT	Severe Thunderstorm Watch	SPC	8 hr

The nearest sounding before it

Washington/Dulle, VA (KIAD), launched 12:00Z, 5.6 hours before the alert went out and 139 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: 607 J/kg
Mixed-layer CIN: -173 J/kg
Mixed-layer LCL: 1349 m above ground
0-6 km bulk shear: 39 kt
0-1 km storm-relative helicity: 76 m²/s²
0-3 km storm-relative helicity: 190 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.1

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 25, 1:26 PM EDT, 12 minutes earlier.

Area forecast discussion, Jul 25, 1:26 PM EDT, 12 minutes before

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Hazardous weather outlook, Jul 25, 11:40 AM EDT, 1 hour 58 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE STATE COLLEGE PA
1140 AM EDT SUN JUL 25 2010

PAZ004>006-010>012-017>019-037-041-042-045-046-049-051-053-261545-
WARREN-MCKEAN-POTTER-ELK-CAMERON-NORTHERN CLINTON-CLEARFIELD-
NORTHERN CENTRE-SOUTHERN CENTRE-TIOGA-NORTHERN LYCOMING-SULLIVAN-
SOUTHERN CLINTON-SOUTHERN LYCOMING-UNION-MONTOUR-COLUMBIA-
1140 AM EDT SUN JUL 25 2010

THIS HAZARDOUS WEATHER OUTLOOK IS FOR CENTRAL PENNSYLVANIA.

.DAY ONE...THIS AFTERNOON AND TONIGHT.

A FEW STORMS WITH GUSTY WINDS ARE POSSIBLE THIS AFTERNOON.

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

THE PROBABILITY FOR WIDESPREAD HAZARDOUS WEATHER IS LOW.

.SPOTTER INFORMATION STATEMENT...

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

PAZ024>028-033>036-050-052-056>059-063>066-261545-
CAMBRIA-BLAIR-HUNTINGDON-MIFFLIN-JUNIATA-SOMERSET-BEDFORD-FULTON-
FRANKLIN-SNYDER-NORTHUMBERLAND-PERRY-DAUPHIN-SCHUYLKILL-LEBANON-
CUMBERLAND-ADAMS-YORK-LANCASTER-
1140 AM EDT SUN JUL 25 2010

...SEVERE THUNDERSTORM WATCH 534 IN EFFECT UNTIL 7 PM EDT THIS
EVENING...

THIS HAZARDOUS WEATHER OUTLOOK IS FOR CENTRAL PENNSYLVANIA.

.DAY ONE...THIS AFTERNOON AND 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.

THE PROBABILITY FOR WIDESPREAD HAZARDOUS WEATHER IS LOW.

.SPOTTER INFORMATION STATEMENT...

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

MARTIN

In the hours before

Special weather statement, Jul 25, 9:35 AM EDT, 4 hours 3 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE STATE COLLEGE PA
935 AM EDT SUN JUL 25 2010

PAZ004-005-010-251430-
ELK PA-MCKEAN PA-WARREN PA-
935 AM EDT SUN JUL 25 2010

...A STRONG THUNDERSTORM WILL AFFECT NORTHWESTERN ELK...SOUTHERN
WARREN AND SOUTHWESTERN MCKEAN COUNTIES...

AT 930 AM EDT...A STRONG THUNDERSTORM WAS 20 MILES NORTH OF OIL
CITY...MOVING EAST AT 35 MPH.

WIND GUSTS TO 50 MPH AND SMALL HAIL ARE POSSIBLE WITH THIS STORM.

THIS STORM WILL BE NEAR GRAND VALLEY AROUND 950 AM...GARLAND AROUND
1000 AM...TIDIOUTE AROUND 1005 AM...YOUNGSVILLE AROUND 1010 AM...
CHAPMAN STATE PARK AROUND 1025 AM AND SHEFFIELD AROUND 1030 AM.

THIS WILL IMPACT THE FOLLOWING MAJOR ROADS...ROUTE 6...ROUTE 62...
STATE ROAD 59...STATE ROAD 66.

PERSONS ACROSS THE AREA SHOULD SEEK SHELTER IF THREATENING
WEATHER OCCURS OR A WARNING IS ISSUED.

LAT...LON 4186 7962 4189 7879 4146 7884 4148 7897
      4162 7896 4162 7898 4162 7961 4163 7962
      4183 7963

FORECASTER: MARTIN

Special weather statement, Jul 25, 9:46 AM EDT, 3 hours 52 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE STATE COLLEGE PA
946 AM EDT SUN JUL 25 2010

PAZ004>006-251445-
MCKEAN PA-POTTER PA-WARREN PA-
946 AM EDT SUN JUL 25 2010

...A STRONG THUNDERSTORM WILL AFFECT NORTHEASTERN WARREN...NORTHERN
MCKEAN AND NORTHWESTERN POTTER COUNTIES...

AT 943 AM EDT...A STRONG THUNDERSTORM WAS 16 MILES NORTHEAST OF
WARREN...MOVING EAST AT 35 MPH.

WIND GUSTS TO 40 MPH ARE POSSIBLE WITH THIS STORM.

THIS STORM WILL BE NEAR LEWIS RUN AROUND 1005 AM...BRADFORD AROUND
1010 AM...REW AROUND 1020 AM...ELDRED AROUND 1030 AM AND
SHINGLEHOUSE AROUND 1045 AM.

THIS WILL IMPACT THE FOLLOWING MAJOR ROADS...ROUTE 219...STATE ROAD
46...STATE ROAD 446.

LAT...LON 4201 7813 4199 7801 4183 7803 4188 7904
      4200 7903

FORECASTER: MARTIN

Special weather statement, Jul 25, 10:24 AM EDT, 3 hours 14 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE STATE COLLEGE PA
1024 AM EDT SUN JUL 25 2010

PAZ004>006-010-011-251530-
CAMERON PA-ELK PA-MCKEAN PA-POTTER PA-WARREN PA-
1024 AM EDT SUN JUL 25 2010

...A LINE OF STRONG THUNDERSTORMS WILL AFFECT NORTHERN CAMERON...
NORTHERN ELK...SOUTHEASTERN WARREN...SOUTHERN MCKEAN AND SOUTHWESTERN
POTTER COUNTIES...

AT 1021 AM EDT...A LINE OF STRONG THUNDERSTORMS WAS LOCATED FROM KANE
TO KANE TO 22 MILES SOUTH OF WARREN...MOVING EAST AT 45 MPH.

WIND GUSTS TO 40 MPH ARE POSSIBLE WITH THESE STORMS. A PERIOD OF
VERY HEAVY RAIN WILL FALL FROM THESE STORMS...AND WILL CAUSE WATER
TO POND ON ROADS AND FILL POOR DRAINAGE AREAS. THE RAIN WILL CAUSE
RAPID RISES ON SMALL STREAMS AND CREEKS. THESE STORMS WILL BE NEAR
WESTLINE...MARSHBURG...JAMES CITY...AND WETMORE AROUND 1030
AM...KINZUA BRIDGE STATE PARK...CYCLONE...WILCOX...AND MOUNT JEWETT
AROUND 1040 AM...SMETHPORT AND RIDGWAY AROUND 1050 AM.

THIS WILL IMPACT THE FOLLOWING MAJOR ROADS...ROUTE 6...ROUTE 219...
STATE ROAD 59...STATE ROAD 66...STATE ROAD 120...STATE ROAD 255.

LAT...LON 4171 7777 4149 7794 4147 7799 4146 7800
      4134 7825 4144 7897 4146 7898 4146 7897
      4162 7896 4162 7911 4163 7911 4165 7908
      4187 7892

FORECASTER: RHG

Special weather statement, Jul 25, 10:28 AM EDT, 3 hours 10 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE STATE COLLEGE PA
1028 AM EDT SUN JUL 25 2010

PAZ006-037-041-042-251530-
NORTHERN LYCOMING PA-POTTER PA-SULLIVAN PA-TIOGA PA-
1028 AM EDT SUN JUL 25 2010

...A STRONG THUNDERSTORM WILL AFFECT NORTHERN LYCOMING...NORTHWESTERN
SULLIVAN...SOUTHEASTERN POTTER AND SOUTHERN TIOGA COUNTIES...

AT 1025 AM EDT...A STRONG THUNDERSTORM WAS NEAR MANSFIELD...MOVING
SOUTHEAST AT 40 MPH.

WIND GUSTS TO 50 MPH ARE POSSIBLE WITH THIS STORM.

THIS STORM WILL BE NEAR OGDENSBURG AROUND 1040 AM...SHUNK AROUND
1055 AM...LINCOLN FALLS AROUND 1100 AM...FORKSVILLE AROUND 1105
AM...OVERTON AROUND 1110 AM...AND NEAR LAPORTE AROUND 1120 AM.

THIS WILL IMPACT THE FOLLOWING MAJOR ROADS...ROUTE 6...ROUTE 15...
ROUTE 220...STATE ROAD 14.

LAT...LON 4160 7687 4156 7638 4146 7651 4148 7774
      4177 7723 4177 7690

FORECASTER: MARTIN

Special weather statement, Jul 25, 10:41 AM EDT, 2 hours 57 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE STATE COLLEGE PA
1041 AM EDT SUN JUL 25 2010

PAZ006-037-251545-
POTTER PA-TIOGA PA-
1041 AM EDT SUN JUL 25 2010

...A STRONG THUNDERSTORM WILL AFFECT NORTHERN POTTER AND NORTHWESTERN
TIOGA COUNTIES...

AT 1038 AM EDT...A STRONG THUNDERSTORM WAS 22 MILES SOUTHEAST OF
OLEAN...MOVING EAST AT 40 MPH.

WIND GUSTS TO 40 MPH ARE POSSIBLE WITH THIS STORM.

THIS STORM WILL BE NEAR GENESEE AROUND 1055 AM...DENTON HILL STATE
PARK AROUND 1100 AM...ULYSSES...AND LYMAN RUN STATE PARK AROUND 1105
AM...HARRISON VALLEY AROUND 1110 AM...GALETON AROUND 1115
AM...GAINES AND WESTFIELD AROUND 1120 AM.

THIS WILL IMPACT THE FOLLOWING MAJOR ROADS...ROUTE 6...STATE ROAD
449.

LAT...LON 4165 7746 4178 7821 4200 7821 4201 7728

FORECASTER: MARTIN

Special weather statement, Jul 25, 11:19 AM EDT, 2 hours 19 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE STATE COLLEGE PA
1119 AM EDT SUN JUL 25 2010

PAZ024-025-251545-
BLAIR PA-CAMBRIA PA-
1119 AM EDT SUN JUL 25 2010

...A STRONG THUNDERSTORM WILL AFFECT CAMBRIA AND SOUTHWESTERN BLAIR
COUNTIES...

AT 1116 AM EDT...A CLUSTER OF STRONG THUNDERSTORMS WERE NEAR
INDIANA...MOVING EAST AT 40 MPH.

WIND GUSTS TO 50 MPH ARE POSSIBLE WITH THESE STORMS.

THESE STORMS WILL BE NEAR WESTMONT AROUND 1125 AM...VINTONDALE
AROUND 1130 AM...BELSANO AROUND 1135 AM...COLVER AROUND 1140 AM AND
CARROLLTOWN AROUND 1145 AM.

THIS WILL IMPACT THE FOLLOWING MAJOR ROADS...THE JOHNSTOWN
EXPRESSWAY...ROUTE 22...ROUTE 219...ROUTE 422...STATE ROAD 56.

LAT...LON 4037 7899 4039 7900 4063 7885 4066 7884
      4066 7850 4029 7853 4029 7855 4032 7861
      4032 7863 4030 7864 4031 7904

FORECASTER: MARTIN

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 24, 8:03 PM EDT	Special Weather Statement	CTP	Clinton	42 min
Jul 24, 8:14 PM EDT	Severe Thunderstorm Warning	CTP	Cameron, Clearfield, Elk	76 min
Jul 24, 8:18 PM EDT	Severe Thunderstorm Warning	CTP	Clinton, Lycoming	42 min
Jul 24, 8:35 PM EDT	Severe Thunderstorm Warning	CTP	Lycoming	40 min
Jul 24, 8:57 PM EDT	Severe Thunderstorm Warning	CTP	Centre, Clinton, Columbia, Lycoming, Montour, Northumberland and 2 more	78 min
Jul 24, 9:07 PM EDT	Special Weather Statement	CTP	Clearfield	23 min
Jul 24, 9:45 PM EDT	Severe Thunderstorm Warning	CTP	Clearfield	29 min
Jul 24, 9:59 PM EDT	Severe Thunderstorm Warning	CTP	Schuylkill	46 min
Jul 24, 10:10 PM EDT	Special Weather Statement	CTP	Clearfield	35 min
Jul 24, 10:32 PM EDT	Special Weather Statement	CTP	Juniata, Mifflin, Snyder	43 min
Jul 24, 11:16 PM EDT	Special Weather Statement	CTP	Dauphin	14 min
Jul 24, 11:35 PM EDT	Special Weather Statement	CTP	Dauphin	25 min
Jul 24, 11:57 PM EDT	Special Weather Statement	CTP	Lebanon	33 min
Jul 25, 8:34 AM EDT	Special Weather Statement	CTP	McKean	56 min
Jul 25, 8:35 AM EDT	Special Weather Statement	CTP	Warren	55 min
Jul 25, 8:41 AM EDT	Areal Flood Advisory	CTP	McKean, Warren	3 hr
Jul 25, 9:27 AM EDT	Special Weather Statement	CTP	Potter, Tioga	63 min
Jul 25, 9:35 AM EDT	Special Weather Statement	CTP	Warren	55 min
Jul 25, 9:46 AM EDT	Special Weather Statement	CTP	McKean	59 min
Jul 25, 10:24 AM EDT	Special Weather Statement	CTP	Cameron, Elk, McKean	66 min
Jul 25, 10:28 AM EDT	Special Weather Statement	CTP	Tioga	62 min
Jul 25, 10:35 AM EDT	Severe Thunderstorm Warning	CTP	Columbia, Lycoming, Montour, Northumberland, Potter, Sullivan and 1 more	55 min
Jul 25, 10:41 AM EDT	Special Weather Statement	CTP	Potter	64 min
Jul 25, 11:19 AM EDT	Special Weather Statement	CTP	Cambria	26 min
Jul 25, 11:42 AM EDT	Severe Thunderstorm Warning	CTP	Cameron, Clinton, Lycoming, Potter	63 min
Jul 25, 11:50 AM EDT	Severe Thunderstorm Warning	CTP	Bedford, Blair, Cambria, Fulton, Huntingdon, Somerset	55 min
Jul 25, 12:06 PM EDT	Severe Thunderstorm Warning	CTP	Bedford, Somerset	54 min
Jul 25, 12:29 PM EDT	Severe Thunderstorm Warning	CTP	Cumberland, Dauphin, Lebanon, Perry	61 min
Jul 25, 12:37 PM EDT	Areal Flood Advisory	CTP	Bedford, Blair, Cambria, Franklin, Fulton, Huntingdon and 4 more	3 hr
Jul 25, 12:44 PM EDT	Severe Thunderstorm Warning	CTP	Centre, Clinton, Lycoming, Union	46 min
Jul 25, 12:46 PM EDT	Severe Thunderstorm Warning	CTP	Bedford, Cumberland, Franklin, Fulton, Huntingdon, Juniata and 3 more	59 min
Jul 25, 1:03 PM EDT	Tornado Warning	CTP	Dauphin, Lancaster	27 min
Jul 25, 1:15 PM EDT	Severe Thunderstorm Warning	CTP	Lancaster, Lebanon	60 min
Jul 25, 1:22 PM EDT	Severe Thunderstorm Warning	CTP	Columbia, Montour, Northumberland, Schuylkill, Snyder, Union	38 min
Jul 25, 1:28 PM EDT	Severe Thunderstorm Warning	CTP	Adams, Cumberland, Franklin, Lebanon, York	77 min
Jul 25, 1:54 PM EDT	Special Weather Statement	CTP	Schuylkill	51 min
Jul 25, 2:06 PM EDT	Tornado Warning	CTP	York	24 min
Jul 25, 2:33 PM EDT	Severe Thunderstorm Warning	CTP	Lancaster, York	42 min
Jul 25, 2:38 PM EDT	Areal Flood Advisory	CTP	Adams, Lancaster, York	3 hr

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.