Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2008

Severe Thunderstorm Warning 180, NWS State College, PA

August 14, 2008Lancaster County, Lebanon County, Pennsylvania

NWS State College, PA issued this severe thunderstorm warning at Aug 14, 2008, 6:04 PM EDT for Lancaster County, Lebanon County, Pennsylvania. It was in force for 41 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
Aug 14, 2008, 6:04 PM EDT (22:04 UTC)
Expired
Aug 14, 2008, 6:45 PM EDT
In force
41 min
Issued by
NWS State College, PA
Area
Storm-based polygon

Counties Lancaster County, PA, Lebanon County, PA

The radar

The State College radar (KCCX), 161 km from the middle of the area, began a volume at 22:07 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
Aug 14, 4:27 PM EDTSevere Thunderstorm WatchSPC5 hr

The nearest sounding before it

Phillips Aaf/Abe, MD (KAPG), launched 12:00Z, 10.1 hours before the alert went out and 84 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, Phillips Aaf/Abe, MD at 12:00Z on 2008-08-14Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 374 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Phillips Aaf/Abe, MD at 12:00Z on 2008-08-14The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 49 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
374 J/kg
Mixed-layer CIN
-64 J/kg
Mixed-layer LCL
966 m above ground
0-6 km bulk shear
30 kt
0-1 km storm-relative helicity
49 m²/s²
0-3 km storm-relative helicity
27 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.9

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 Aug 14, 5:01 PM EDT, 1 hour 3 minutes earlier.

Area forecast discussion, Aug 14, 5:01 PM EDT, 1 hour 3 minutes before
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Hazardous weather outlook, Aug 14, 5:05 PM EDT, 59 minutes before
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In the hours before

Special weather statement, Aug 14, 3:35 PM EDT, 2 hours 29 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE STATE COLLEGE PA
335 PM EDT THU AUG 14 2008

PAZ058-142030-
SCHUYLKILL PA-
335 PM EDT THU AUG 14 2008

...STRONG THUNDERSTORMS WILL AFFECT CENTRAL SCHUYLKILL COUNTY...

AT 329 PM EDT...STRONG THUNDERSTORMS WERE CLUSTERED OVER CENTRAL
SCHUYLKILL COUNTY...MOVING EAST AT 10 MPH.

THESE STORMS WILL PRODUCE HAIL UP TO DIME SIZE. VERY HEAVY RAIN WILL
ALSO FALL FROM THIS STORM...AND WILL CAUSE WATER TO POND ON ROADS AND
QUICKLY FILL ROADSIDE DITCHES AND SMALL STREAMS.

STORMS WILL BE NEAR GILBERTON AROUND 345 PM...SHENANDOAH AROUND
350 PM...POTTSVILLE...AND ST. CLAIR AROUND 355 PM...SCHUYLKILL
HAVEN...AND PORT CARBON AROUND 405 PM...MAHANOY CITY AROUND 410 PM
AND LOCUST LAKE STATE PARK AROUND 415 PM.

THIS WILL IMPACT THE FOLLOWING CENTRAL PENNSYLVANIA INTERSTATES...
I-81 BETWEEN MILE MARKERS 100 AND 133...AS WELL AS THE FOLLOWING
MAJOR ROADS...ROUTE 209...STATE ROAD 61.

FORECASTER: DEVOIR
Special weather statement, Aug 14, 4:02 PM EDT, 2 hours 2 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE STATE COLLEGE PA
402 PM EDT THU AUG 14 2008

PAZ056-057-063-142100-
CUMBERLAND PA-DAUPHIN PA-PERRY PA-
402 PM EDT THU AUG 14 2008

...A STRONG THUNDERSTORM WILL AFFECT CENTRAL PERRY...NORTHEASTERN
CUMBERLAND AND WEST CENTRAL DAUPHIN COUNTIES...

AT 359 PM EDT...A STRONG THUNDERSTORM WAS LOCATED 12 MILES NORTH OF
CARLISLE...MOVING EAST AT 10 MPH.

WIND GUSTS TO 40 MPH AND HAIL UP TO DIME SIZE ARE POSSIBLE WITH THIS
STORM. EXPECT INTENSE 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 NEW BLOOMFIELD AROUND 420 PM...SHERMANSDALE
AROUND 430 PM...CARLISLE SPRINGS AROUND 440 PM AND DUNCANNON AROUND
500 PM.

THIS WILL IMPACT THE FOLLOWING CENTRAL PENNSYLVANIA INTERSTATES...THE
PENNSYLVANIA TURNPIKE BETWEEN MILE MARKERS 236 AND 237...I-70 BETWEEN
MILE MARKERS 236 AND 237...I-81 BETWEEN MILE MARKERS 52 AND 64.

THIS WILL ALSO IMPACT THE FOLLOWING MAJOR ROADS...ROUTE 11...ROUTE
11/15...ROUTE 322/22.

FORECASTER: MARTIN
Special weather statement, Aug 14, 4:34 PM EDT, 1 hour 30 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE STATE COLLEGE PA
434 PM EDT THU AUG 14 2008

PAZ066-142115-
LANCASTER PA-
434 PM EDT THU AUG 14 2008

...A STRONG THUNDERSTORM WILL AFFECT NORTH CENTRAL LANCASTER
COUNTY...

AT 432 PM EDT...A STRONG THUNDERSTORM WAS LOCATED NEAR EAST
PETERSBURG...MOVING EAST AT 11 MPH.

WIND GUSTS TO 40 MPH AND SMALL HAIL ARE POSSIBLE WITH THIS STORM.

THIS STORM WILL BE NEAR MANHEIM AROUND 440 PM...MILLERSVILLE
AROUND 455 PM...LANCASTER AROUND 505 PM AND LEOLA AROUND 515 PM.

THIS WILL IMPACT THE FOLLOWING CENTRAL PENNSYLVANIA INTERSTATES...THE
PENNSYLVANIA TURNPIKE BETWEEN MILE MARKERS 265 AND 284...I-70 BETWEEN
MILE MARKERS 265 AND 284.

THIS WILL ALSO IMPACT THE FOLLOWING MAJOR ROADS...STATE HIGHWAY
283...ROUTE 30...ROUTE 222...ROUTE 322...STATE ROAD 501.

FORECASTER: MARTIN
Special weather statement, Aug 14, 5:10 PM EDT, 54 minutes before
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Special weather statement, Aug 14, 5:20 PM EDT, 44 minutes before
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Local storm report, Aug 14, 5:40 PM EDT, 24 minutes before
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The office that day

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

IssuedProductOfficeCountiesLasted
Aug 13, 8:08 PM EDTSevere Thunderstorm WarningCTPFranklin, Fulton53 min
Aug 13, 9:02 PM EDTAreal Flood AdvisoryCTPLancaster88 min
Aug 14, 2:24 PM EDTSevere Thunderstorm WarningCTPLancaster, York66 min
Aug 14, 2:45 PM EDTAreal Flood AdvisoryCTPSchuylkill3 hr
Aug 14, 2:53 PM EDTSevere Thunderstorm WarningCTPJuniata, Perry, Snyder67 min
Aug 14, 3:20 PM EDTSevere Thunderstorm WarningCTPAdams, Cumberland55 min
Aug 14, 3:29 PM EDTSevere Thunderstorm WarningCTPLancaster31 min
Aug 14, 3:33 PM EDTAreal Flood AdvisoryCTPSchuylkill3 hr
Aug 14, 4:08 PM EDTSevere Thunderstorm WarningCTPSchuylkill37 min
Aug 14, 4:22 PM EDTSevere Thunderstorm WarningCTPAdams, York53 min
Aug 14, 4:42 PM EDTSevere Thunderstorm WarningCTPLancaster, York93 min
Aug 14, 5:27 PM EDTSevere Thunderstorm WarningCTPLancaster, York61 min
Aug 14, 5:43 PM EDTAreal Flood AdvisoryCTPDauphin, Lancaster, Lebanon3 hr

Nearby

Severe Thunderstorm Warnings in Pennsylvania, 2008Every severe thunderstorm warning in 2008

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.