Alert archive / Pennsylvania / Special Weather Statements in 2016

Special Weather Statement, NWS State College, PA

August 21, 2016Lebanon County, Pennsylvania

NWS State College, PA issued this special weather statement at Aug 21, 2016, 12:21 PM EDT for Lebanon County, Pennsylvania. It was in force for 54 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued
Aug 21, 2016, 12:21 PM EDT (16:21 UTC)
Expired
Aug 21, 2016, 1:15 PM EDT
In force
54 min
Issued by
NWS State College, PA

County Lebanon County, PA

The radar

The State College radar (KCCX), 143 km from the middle of the area, began a volume at 16:23 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 nearest sounding before it

Washington/Dulle, VA (KIAD), launched 12:00Z, 4.4 hours before the alert went out and 145 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 12:00Z on 2016-08-21Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 310 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Washington/Dulle, VA at 12:00Z on 2016-08-21The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 54 square meters per square second.1939Sfc1 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
310 J/kg
Mixed-layer CIN
-37 J/kg
Mixed-layer LCL
719 m above ground
0-6 km bulk shear
26 kt
0-1 km storm-relative helicity
54 m²/s²
0-3 km storm-relative helicity
78 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.5

Open this sounding in Storm Lab

The text

As transmitted.

520 
WWUS81 KCTP 211621
SPSCTP

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE STATE COLLEGE PA
1221 PM EDT SUN AUG 21 2016
 
PAZ057-059-065-066-211715-
DAUPHIN PA-LANCASTER PA-YORK PA-LEBANON PA-
1221 PM EDT SUN AUG 21 2016

...A STRONG THUNDERSTORM WILL AFFECT PARTS OF LEBANON...YORK...
DAUPHIN...AND LANCASTER COUNTIES UNTIL 115 PM EDT...

AT 1219 PM EDT...DOPPLER RADAR INDICATED A STRONG THUNDERSTORM NEAR
MANCHESTER...MOVING NORTHEAST AT 20 MPH.

A 15 TO 20 MINUTE PERIOD OF VERY HEAVY RAIN...UP TO ONE INCH...IS
EXPECTED. WINDS IN EXCESS OF 40 MPH ARE POSSIBLE.

LOCATIONS IMPACTED INCLUDE...
HERSHEY...MANHEIM...ELIZABETHTOWN...PALMYRA...MIDDLETOWN...
HUMMELSTOWN...MOUNT JOY...MAYTOWN...VALLEY GREEN...
MOUNT GRETNA HEIGHTS...MOUNT WOLF...RHEEMS...CAMPBELLTOWN...
QUENTIN...ROYALTON...BAINBRIDGE...LAWN...TIMBER HILLS...
EMIGSVILLE AND MANCHESTER.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

MINOR FLOODING MAY DEVELOP IN POOR DRAINAGE AREAS AND UNDERPASSES.
DO NOT DRIVE INTO WATER COVERING THE ROADWAY.

THIS STORM CONTAINS WEAK ROTATION AND MAY INTENSIFY...SO BE CERTAIN
TO MONITOR LOCAL RADIO STATIONS AND AVAILABLE TELEVISION STATIONS
FOR ADDITIONAL INFORMATION AND POSSIBLE WARNINGS FROM THE NATIONAL
WEATHER SERVICE.

&&

LAT...LON 3998 7680 4010 7689 4038 7660 4018 7627
TIME...MOT...LOC 1619Z 233DEG 18KT 4009 7676 

$$

LAMBERT

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 21, 9:09 AM EDTSpecial Weather StatementCTPElk51 min
Aug 21, 11:12 AM EDTSpecial Weather StatementCTPBlair, Huntingdon, Mifflin63 min
Aug 21, 12:10 PM EDTSpecial Weather StatementCTPLebanon, Schuylkill65 min
Aug 21, 12:24 PM EDTSpecial Weather StatementCTPJuniata, Montour, Northumberland, Perry, Snyder, Union66 min
Aug 21, 1:05 PM EDTSpecial Weather StatementCTPLancaster, Lebanon, Schuylkill40 min
Aug 21, 1:48 PM EDTSpecial Weather StatementCTPLancaster42 min

Nearby

Special Weather Statements in Pennsylvania, 2016Every special weather statement in 2016

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.