Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2016

Severe Thunderstorm Warning 21, NWS State College, PA

June 21, 2016York County, Pennsylvania

NWS State College, PA issued this severe thunderstorm warning at Jun 21, 2016, 8:11 AM EDT for York County, Pennsylvania. It was in force for 27 min. 1 report came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued
Jun 21, 2016, 8:11 AM EDT (12:11 UTC)
Expired
Jun 21, 2016, 8:38 AM EDT
In force
27 min
Issued by
NWS State College, PA
Area
Storm-based polygon
Tornado
Possible
Hail
1.0 in
Wind
70.0 mph

County York County, PA

The radar

The Sterling radar (KLWX), 111 km from the middle of the area, began a volume at 12:11 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.

What was reported inside it

TimeReportWhereRemark
Jun 21, 8:12 AM EDTTSTM WND DMGHomeland Gardens, PATREES AND WIRES DOWN ON PINE GROVE ROAD

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Phillips Aaf/Abe, MD (KAPG), launched 12:00Z, 0.2 hours before the alert went out and 79 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 2016-06-21Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1292 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, Phillips Aaf/Abe, MD at 12:00Z on 2016-06-21The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 150 square meters per square second.19395878Sfc1 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
1292 J/kg
Mixed-layer CIN
-69 J/kg
Mixed-layer LCL
1267 m above ground
0-6 km bulk shear
46 kt
0-1 km storm-relative helicity
150 m²/s²
0-3 km storm-relative helicity
191 m²/s²
Significant tornado parameter
0.0
Supercell composite
2.2

Open this sounding in Storm Lab

The text

As transmitted.

146 
WUUS51 KCTP 211211
SVRCTP
PAC133-211315-
/O.NEW.KCTP.SV.W.0021.160621T1211Z-160621T1315Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE STATE COLLEGE PA
811 AM EDT TUE JUN 21 2016

THE NATIONAL WEATHER SERVICE IN STATE COLLEGE PA HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTHWESTERN YORK COUNTY IN SOUTH CENTRAL PENNSYLVANIA...

* UNTIL 915 AM EDT

* AT 811 AM EDT...A SEVERE THUNDERSTORM WAS LOCATED OVER SPRING
  GROVE... MOVING SOUTHEAST AT 35 MPH.

  HAZARD...70 MPH WIND GUSTS AND QUARTER SIZE HAIL. 

  SOURCE...RADAR INDICATED. 

  IMPACT...HAIL DAMAGE TO VEHICLES IS EXPECTED. EXPECT CONSIDERABLE 
           TREE DAMAGE. WIND DAMAGE IS ALSO LIKELY TO MOBILE HOMES...
           ROOFS...AND OUTBUILDINGS. 

* LOCATIONS IMPACTED INCLUDE...
  SPRY...WEIGELSTOWN...YORK...DALLASTOWN...PARKVILLE...SHREWSBURY...
  JACOBUS...SHILOH...SPRING GROVE...NEW FREEDOM...GRANTLEY...
  STEWARTSTOWN...CROSS ROADS...WEST YORK...CODORUS...GLEN ROCK...
  YORK AIRPORT...RAILROAD...TYLER RUN-QUEENS GATE AND GLENVILLE.

THIS INCLUDES INTERSTATE 83 FROM MILE MARKERS 0 TO 15.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

PREPARE IMMEDIATELY FOR LARGE HAIL AND DAMAGING WINDS. PEOPLE OUTSIDE
SHOULD MOVE IMMEDIATELY TO SHELTER INSIDE A STRONG BUILDING. STAY
AWAY FROM WINDOWS.

&&

LAT...LON 3985 7697 3985 7696 3987 7696 3988 7698
      3994 7694 4000 7678 3972 7644 3972 7692
TIME...MOT...LOC 1211Z 314DEG 32KT 3988 7687 

TORNADO...POSSIBLE
HAIL...1.00IN
WIND...70MPH
 
$$

CERU
2 follow-up statements
593 
WWUS51 KCTP 211230
SVSCTP

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE STATE COLLEGE PA
830 AM EDT TUE JUN 21 2016

PAC133-211315-
/O.CON.KCTP.SV.W.0021.000000T0000Z-160621T1315Z/
YORK PA-
830 AM EDT TUE JUN 21 2016

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 915 AM EDT
FOR SOUTH CENTRAL YORK COUNTY...

AT 829 AM EDT...A SEVERE THUNDERSTORM WAS LOCATED OVER
STEWARTSTOWN... MOVING SOUTHEAST AT 50 MPH. THIS STORM HAS WEAKENED
SIGNIFICANTLY IN THE PAST 20 MINUTES BUT IS STILL CAPABLE OF
PRODUCING WIND DAMAGE.

HAZARD...60 MPH WIND GUSTS AND PENNY SIZE HAIL. 

SOURCE...RADAR INDICATED. 

IMPACT...EXPECT DAMAGE TO ROOFS...SIDING...AND TREES. 

LOCATIONS IMPACTED INCLUDE...
RAILROAD...SHREWSBURY...STEWARTSTOWN...CROSS ROADS...NEW FREEDOM...
GLEN ROCK...JACOBUS...WINTERSTOWN...FAWN GROVE...
SEVEN VALLEYS AND LOGANVILLE.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF A
BUILDING.

&&

LAT...LON 3977 7679 3986 7678 3988 7663 3972 7644
      3972 7677
TIME...MOT...LOC 1229Z 299DEG 43KT 3977 7663 

TORNADO...POSSIBLE
HAIL...0.75IN
WIND...60MPH
 
$$

DANGELO
994 
WWUS51 KCTP 211238
SVSCTP

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE STATE COLLEGE PA
838 AM EDT TUE JUN 21 2016

PAC133-211247-
/O.CAN.KCTP.SV.W.0021.000000T0000Z-160621T1315Z/
YORK PA-
838 AM EDT TUE JUN 21 2016

...THE SEVERE THUNDERSTORM WARNING FOR SOUTH CENTRAL YORK COUNTY IS
CANCELLED...
                
THE STORM WHICH PROMPTED THE WARNING HAS WEAKENED BELOW SEVERE
LIMITS...AND NO LONGER POSES AN IMMEDIATE THREAT TO LIFE OR PROPERTY.
THEREFORE THE WARNING HAS BEEN CANCELLED.

LAT...LON 3977 7679 3986 7678 3988 7663 3972 7644
      3972 7677
TIME...MOT...LOC 1234Z 314DEG 32KT 3972 7656 

$$

DANGELO

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 21, 12:38 AM EDTSpecial Weather StatementCTPWarren37 min
Jun 21, 1:43 AM EDTSpecial Weather StatementCTPTioga47 min
Jun 21, 2:23 AM EDTSpecial Weather StatementCTPPotter37 min
Jun 21, 3:01 AM EDTSpecial Weather StatementCTPLycoming, Sullivan59 min
Jun 21, 4:08 AM EDTSpecial Weather StatementCTPColumbia, Montour22 min
Jun 21, 6:43 AM EDTSpecial Weather StatementCTPCumberland47 min
Jun 21, 7:16 AM EDTSpecial Weather StatementCTPCumberland29 min
Jun 21, 7:22 AM EDTSevere Thunderstorm WarningCTPAdams, Cumberland, York53 min
Jun 21, 11:40 AM EDTSpecial Weather StatementCTPAdams, Franklin, Fulton20 min
Jun 21, 12:01 PM EDTSpecial Weather StatementCTPAdams, Franklin44 min
Jun 21, 12:21 PM EDTSpecial Weather StatementCTPSomerset54 min
Jun 21, 7:20 PM EDTSpecial Weather StatementCTPAdams25 min
Jun 21, 7:47 PM EDTSpecial Weather StatementCTPAdams43 min
Jun 21, 7:59 PM EDTSevere Thunderstorm WarningCTPAdams, York61 min

Nearby

Severe Thunderstorm Warnings in Pennsylvania, 2016Every severe thunderstorm warning 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.