Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 225, NWS State College, PA

September 18, 2012Lancaster County, York County, Pennsylvania

NWS State College, PA issued this severe thunderstorm warning at Sep 18, 2012, 3:11 PM EDT for Lancaster County, York County, Pennsylvania. It was in force for 79 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: Sep 18, 2012, 3:11 PM EDT (19:11 UTC)
Expired: Sep 18, 2012, 4:30 PM EDT
In force: 79 min
Issued by: NWS State College, PA
Area: Storm-based polygon

Counties Lancaster County, PA, York County, PA

The radar

The Sterling radar (KLWX), 144 km from the middle of the area, began a volume at 19:14 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

Time	Report	Where	Remark
Sep 18, 3:55 PM EDT	TSTM WND DMG	Lancaster, PA	POWER POLE AND WIRES DOWN.

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

Did it verify

Verified. The Iowa Environmental Mesonet's Cow matched one storm report to this severe thunderstorm warning; the first came 44 minutes after it went out.

Cow counts a report within 15 km of the polygon while the warning was in force: a tornado for a tornado warning; hail of 1 inch or more, a gust of 58 mph or more or wind damage for a severe thunderstorm warning; a flash flood report for a flash flood warning.

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Sep 18, 12:10 PM EDT	Tornado Watch	SPC	9 hr

The nearest sounding before it

Phillips Aaf/Abe, MD (KAPG), launched 12:00Z, 7.2 hours before the alert went out and 70 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: 330 J/kg
Mixed-layer CIN: -6 J/kg
Mixed-layer LCL: 519 m above ground
0-6 km bulk shear: 40 kt
0-1 km storm-relative helicity: 265 m²/s²
0-3 km storm-relative helicity: 275 m²/s²
Significant tornado parameter: 0.4
Supercell composite: 2.3

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

265 
WUUS51 KCTP 181911
SVRCTP
PAC071-133-182030-
/O.NEW.KCTP.SV.W.0225.120918T1911Z-120918T2030Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE STATE COLLEGE PA
311 PM EDT TUE SEP 18 2012

THE NATIONAL WEATHER SERVICE IN STATE COLLEGE PA HAS ISSUED A

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

* UNTIL 430 PM EDT

* AT 306 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  LINE OF SEVERE THUNDERSTORMS. THESE SEVERE STORMS EXTENDED FROM
  MCSHERRYSTOWN TO MILLERS TO MANCHESTER...MOVING NORTHEAST AT 40
  MPH. THESE STORMS ARE CAPABLE OF PRODUCING DAMAGING WINDS IN EXCESS
  OF 60 MPH. 

* LOCATIONS IN THE WARNING INCLUDE...
  SPRING GROVE AND THOMASVILLE...
  SHREWSBURY AND GLEN ROCK...
  WEIGELSTOWN AND DOVER...
  YORK AND EMIGSVILLE...
  MANCHESTER AND WINDSOR...
  BAINBRIDGE AND HALLAM...

THIS WILL IMPACT THE FOLLOWING CENTRAL PENNSYLVANIA INTERSTATES...THE
PENNSYLVANIA TURNPIKE BETWEEN MILE MARKERS 265 AND 295...I-83 BETWEEN
MILE MARKERS 1 AND 31.

THIS WILL ALSO IMPACT THE FOLLOWING MAJOR ROADS...STATE HIGHWAY
283...ROUTE 30...ROUTE 222...ROUTE 322...STATE ROAD 41...STATE ROAD
94...STATE ROAD 501.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A TORNADO WATCH REMAINS IN EFFECT FOR THE WARNED AREA. IF A TORNADO
IS SPOTTED...ACT QUICKLY AND MOVE TO A PLACE OF SAFETY INSIDE A
STRONG BUILDING...SUCH AS A BASEMENT OR SMALL INTERIOR ROOM.

SEVERE THUNDERSTORMS PRODUCE DAMAGE. MOVE INSIDE A PERMANENT BUILDING
NOW TO BE SAFE FROM STRONG WIND GUSTS.

PLEASE REPORT HAIL...STRONG WINDS OR WIND DAMAGE TO THE NATIONAL
WEATHER SERVICE BY CALLING TOLL FREE...1 8 7 7 6 3 3 6 7 7 2.

&&

LAT...LON 3983 7700 3986 7695 3989 7699 3995 7697
      4014 7678 4014 7675 4012 7672 4019 7660
      4024 7643 4025 7630 4032 7615 4014 7587
      4011 7593 4004 7593 3996 7599 3987 7598
      3972 7610 3972 7700
TIME...MOT...LOC 1911Z 236DEG 36KT 3982 7695 3964 7676
          3934 7692

$$

FORECASTER: RXR

2 follow-up statements

379 
WWUS51 KCTP 181950
SVSCTP

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE STATE COLLEGE PA
350 PM EDT TUE SEP 18 2012

PAC071-133-182030-
/O.CON.KCTP.SV.W.0225.000000T0000Z-120918T2030Z/
LANCASTER PA-YORK PA-
350 PM EDT TUE SEP 18 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 430 PM EDT
FOR YORK AND LANCASTER COUNTIES...

AT 346 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING DAMAGING
WINDS IN EXCESS OF 60 MPH. THESE STORMS WERE LOCATED ALONG A LINE
EXTENDING FROM HALLAM TO HOLTWOOD TO 14 MILES SOUTH OF FAWN GROVE...
MOVING NORTHEAST AT 40 MPH.

LOCATIONS IN THE WARNING INCLUDE...
  MOUNT JOY AND RHEEMS...
  WILLOW STREET AND SMITHVILLE...
  MANHEIM AND STRASBURG...
  LITITZ AND QUARRYVILLE...
  BRICKERVILLE AND ROTHSVILLE...
  WAKEFIELD AND NEW HOLLAND...

THIS WILL IMPACT THE FOLLOWING CENTRAL PENNSYLVANIA INTERSTATES...THE
PENNSYLVANIA TURNPIKE BETWEEN MILE MARKERS 265 AND 295...I-83 BETWEEN
MILE MARKERS 1 AND 7.

THIS WILL ALSO IMPACT THE FOLLOWING MAJOR ROADS...STATE HIGHWAY
283...ROUTE 30...ROUTE 222...ROUTE 322...STATE ROAD 41...STATE ROAD
501.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A TORNADO WATCH REMAINS IN EFFECT FOR THE WARNED AREA. IF A TORNADO
IS SPOTTED...ACT QUICKLY AND MOVE TO A PLACE OF SAFETY IN A STURDY
STRUCTURE...SUCH AS A BASEMENT OR SMALL INTERIOR ROOM.

PLEASE REPORT HAIL...STRONG WINDS OR WIND DAMAGE TO THE NATIONAL
WEATHER SERVICE BY CALLING TOLL FREE...1 8 7 7 6 3 3 6 7 7 2.

&&

LAT...LON 4020 7657 4024 7645 4025 7630 4032 7615
      4014 7587 4011 7593 4004 7593 3996 7599
      3987 7598 3985 7601 3984 7601 3972 7610
      3972 7671
TIME...MOT...LOC 1950Z 236DEG 36KT 4004 7653 3986 7634
          3956 7650

$$

FORECASTER: RXR

248 
WWUS51 KCTP 182018
SVSCTP

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE STATE COLLEGE PA
418 PM EDT TUE SEP 18 2012

PAC133-182028-
/O.CAN.KCTP.SV.W.0225.000000T0000Z-120918T2030Z/
YORK PA-
418 PM EDT TUE SEP 18 2012

...THE SEVERE THUNDERSTORM WARNING FOR YORK COUNTY IS CANCELLED...

THE STORM THAT PROMPTED THE SEVERE THUNDERSTORM WARNING HAS MOVED OUT
OF THE AREA...THEREFORE THE SEVERE THUNDERSTORM WARNING HAS BEEN
CANCELLED.

LAT...LON 3978 7628 3982 7634 4002 7628 4027 7626
      4032 7615 4013 7587 4011 7593 4004 7593
      3996 7599 3987 7598 3985 7601 3983 7601
      3977 7606 3972 7610 3972 7624
TIME...MOT...LOC 2018Z 216DEG 49KT 4038 7612 4014 7611
          3975 7626

$$

PAC071-182030-
/O.CON.KCTP.SV.W.0225.000000T0000Z-120918T2030Z/
LANCASTER PA-
418 PM EDT TUE SEP 18 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 430 PM EDT
FOR LANCASTER COUNTY...

AT 413 PM EDT...A LINE OF SEVERE THUNDERSTORMS WAS REPORTED CAPABLE
OF PRODUCING DAMAGING WINDS IN EXCESS OF 60 MPH. THESE STORMS WERE
LOCATED ALONG A LINE EXTENDING FROM 7 MILES NORTH OF DENVER TO LEOLA
TO 9 MILES SOUTHWEST OF WAKEFIELD...MOVING NORTHEAST AT 50 MPH.

LOCATIONS IN THE WARNING INCLUDE...
  ADAMSTOWN AND TERRE HILL...
  GAP AND CHURCHTOWN...

THIS WILL IMPACT THE PENNSYLVANIA TURNPIKE BETWEEN MILE MARKERS 277
AND 295.

THIS WILL ALSO IMPACT THE FOLLOWING MAJOR ROADS...ROUTE 30...ROUTE
222...ROUTE 322...STATE ROAD 41.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A TORNADO WATCH REMAINS IN EFFECT FOR THE WARNED AREA. IF A TORNADO
IS SPOTTED...ACT QUICKLY AND MOVE TO A PLACE OF SAFETY IN A STURDY
STRUCTURE...SUCH AS A BASEMENT OR SMALL INTERIOR ROOM.

PLEASE REPORT HAIL...STRONG WINDS OR WIND DAMAGE TO THE NATIONAL
WEATHER SERVICE BY CALLING TOLL FREE...1 8 7 7 6 3 3 6 7 7 2.

&&

LAT...LON 3978 7628 3982 7634 4002 7628 4027 7626
      4032 7615 4013 7587 4011 7593 4004 7593
      3996 7599 3987 7598 3985 7601 3983 7601
      3977 7606 3972 7610 3972 7624
TIME...MOT...LOC 2018Z 216DEG 49KT 4038 7612 4014 7611
          3975 7626

$$

FORECASTER: RXR

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 Sep 18, 2:58 PM EDT, 13 minutes earlier.

Area forecast discussion, Sep 18, 2:58 PM EDT, 13 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE STATE COLLEGE PA
258 PM EDT TUE SEP 18 2012

.SYNOPSIS...
A COLD FRONT WILL PUSH ACROSS THE STATE LATE TODAY AND THIS EVENING.
A SFC RIDGE WILL BUILD OVER PENNSYLVANIA FOR THE SECOND HALF OF THIS
WEEK. A COLD FRONT IS LIKELY TO PASS THROUGH THE AREA OVER THE
UPCOMING WEEKEND WITH THE NEXT CHANCE FOR SHOWERS.

&&

.NEAR TERM /UNTIL 6 PM THIS EVENING/...
TORNADO WATCH NO. 643 CONTINUES UNTIL 7 PM EDT...BUT WILL LIKELY BE
GRADUALLY CHOPPED OFF WEST OF THE SUSQ VALLEY PRIOR TO THAT AS THE
EXTREMELY STRONG...GRTN 50 KT LLJ LIFTS TO THE NE OF THE STATE.

SFC COLD FRONT ACROSS EXTREME WRN PENN AT 19Z WILL PUSH EAST AT
NEARLY 20 KTS...CROSSING THE CENTRAL MTNS THIS EVENING...AND
CLEARING THE EXTREME EASTERN PARTS OF OUR CWA AROUND OR SHORTLY
AFTER MIDNIGHT. SEVERAL WEAK WAVES OF LOW PRESSURE WILL BE RIPPLING
NORTH ALONG THE WESTERN PERIPHERY OF THE DEPARTING LLJ AND WILL
MAINTAIN LIGHT TO MODERATE RAIN FOR THE NEXT SEVERAL HOURS ACROSS
THE EASTERN HALF OF PENN. A FEW ADDITIONAL LIGHT TO MDT SHOWERS WILL
ACCOMPANY THE CFROPA.

A FLASH FLOOD...AND MARGINAL SEVERE WEATHER THREAT REMAINS FOR THE
NEXT 2-3 HOURS ACROSS THE REGION TO THE SE OF INTERSTATE 81...AS A
LEWP MOVES NE FROM NE MARYLAND...AND SOME TRAINING OF THE CONVECTION
OCCURS.

STORM TOTAL RAINFALL FOR THE PAST 18 HOURS HAS RANGED FROM ABOUT 1.5
INCHES IN THE WEST...TO AS MUCH AS 3-3.5 INCHES ACROSS PORTIONS OF
THE EASTERN THIRD OF THE CWA.
&&

.SHORT TERM /6 PM THIS EVENING THROUGH 6 PM WEDNESDAY/...
IMPROVING CONDITIONS WILL OCCUR THROUGH THIS PERIOD AS A DRY SLOT
OVERSPREADS THE REGION IN THE WAKE OF THE CFRONT.

VERY LOW MID-LEVEL LAPSE RATES...AND A LARGE BAND OF BELOW NORMAL
PWAT AIR OF ONLY 0.50 INCH...WILL LEAD TO MAINLY SUNNY SKIES
WEDNESDAY...AFTER SOME AREAS OF MORNING CLOUDS AND PATCHY FOG.

LOW TEMPS TONIGHT WILL RANGE FROM A CHILLY 40F ACROSS THE NW
MTNS...TO THE MID 50S IN THE FAR SE.

MAX TEMPS WED WILL BE IN THE U50S OVER THE HIGHER TERRAIN OF THE
NORTH AND WEST...TO THE UPPER 60S THROUGHOUT THE SUSQ VALLEY.

&&

.LONG TERM /WEDNESDAY NIGHT THROUGH TUESDAY/...
POTENTIAL EXISTS FOR A FROST ACROSS THE N MTNS WED NIGHT...AS SFC
RIDGE AND ASSOC DRY AIR MASS BUILD OVR THE REGION. BULK OF MED
RANGE GUIDANCE INDICATES PA WILL REMAIN UNDER SFC RIDGE THRU LATE
THIS WEEK...INDICATING FAIR AND RELATIVELY MILD WX. CAN/T RULE OUT
A FEW -SHRA FRI AFTN ACROSS THE NW MTNS ASSOC WITH A DYING COLD
FRONT...BUT WILL KEEP POPS IN THE SLIGHT CHC CATEGORY FOR NOW.

GEFS AND ECMWF ENSEMBLE MEAN INDICATE UPPER TROF OVR THE GRT LKS
SHIFTS EAST OVR THE WEEKEND...PUSHING A COLD FRONT THRU CENTRAL
PA. THIS WILL BRING A CHANCE FOR SHOWERS...MAINLY SAT...BUT
POSSIBLY LASTING INTO SUNDAY. SOMEWHAT BLW NORMAL TEMPS APPEAR
LIKELY BY NEXT MONDAY...WHEN GEFS AND ECMWF MEAN 8H TEMPS FALL BLW
SEASONAL NORMS.

&&

.AVIATION /19Z TUESDAY THROUGH SUNDAY/...
EXTENSIVE STRATIFORM RAIN SHIELD...AND A FEW EMBEDDED HEAVIER LINES
OF CONVECTIVE RAINS/LOW-TOPPED TSRA WILL SLOWLY EXIT THE EASTERN
HALF THE CWA THIS EVENING AS A COLD FRONT PUSHES EAST ACROSS THE
STATE. WIDESPREAD MVFR TO IFR CONDITIONS WILL BECOME CONFINED TO THE
WESTERN HIGH TERRAIN WHERE MOIST UPSLOPE FLOW WILL KEEP CIGS BELOW 1
KFT AGL AND AREAS OF MVFR VSBYS.

LLWS ACROSS THE EASTERN TAF SITES WILL END BY 22 TUE-00Z WED.

AFTER SOME AREAS OF MORNING LOW CLOUDS AND FOG....WIDESPREAD VFR
WILL OVERSPREAD THE AREA BY LATE WED MORNING.

OUTLOOK...WED TO SATURDAY...
WED...IMPROVING CONDITIONS WITH WEST TO NW WINDS OF 10-15 KTS...
MAINLY VFR AFTER ABOUT 15Z.
THU AND FRI...MAINLY VFR EXCEPT IN POSSIBLE AREAS MVFR/IFR IN
OVERNIGHT PATCHY FOG.
SAT AND SUN...A FEW PERIODS OF MVFR CIGS AND VSBYS IN SHOWERS WITH
THE PASSAGE OF ONE OR TWO COLD FRONTS.

&&

.CTP WATCHES/WARNINGS/ADVISORIES...
NONE.

&&

SYNOPSIS...LAMBERT
NEAR TERM...LAMBERT
SHORT TERM...LAMBERT
LONG TERM...DEVOIR/FITZGERALD
AVIATION...LAMBERT

Hazardous weather outlook, Sep 18, 12:15 PM EDT, 2 hours 56 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE STATE COLLEGE PA
1215 PM EDT TUE SEP 18 2012

PAZ006-011-012-017>019-024>027-033>035-037-045-191615-
POTTER-CAMERON-NORTHERN CLINTON-CLEARFIELD-NORTHERN CENTRE-
SOUTHERN CENTRE-CAMBRIA-BLAIR-HUNTINGDON-MIFFLIN-SOMERSET-BEDFORD-
FULTON-TIOGA-SOUTHERN CLINTON-
1215 PM EDT TUE SEP 18 2012

THIS HAZARDOUS WEATHER OUTLOOK IS FOR CENTRAL PENNSYLVANIA.

.DAY ONE...THIS AFTERNOON AND TONIGHT.

THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS THROUGH LATE
AFTERNOON...ASSOCIATED WITH A POTENT COLD FRONT APPROACHING FROM
THE WEST. THE MAIN SEVERE WEATHER THREAT WILL BE DAMAGING WIND
GUSTS AND THE AREA MOST PRONE TO DAMAGING GUSTS WILL BE ACROSS THE
EASTERN HALF OF THE STATE.

.DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY.

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION IS NOT EXPECTED AT THIS TIME.

PAZ028-036-041-042-046-049>053-056>059-063>066-191615-
JUNIATA-FRANKLIN-NORTHERN LYCOMING-SULLIVAN-SOUTHERN LYCOMING-UNION-
SNYDER-MONTOUR-NORTHUMBERLAND-COLUMBIA-PERRY-DAUPHIN-SCHUYLKILL-
LEBANON-CUMBERLAND-ADAMS-YORK-LANCASTER-
1215 PM EDT TUE SEP 18 2012

...TORNADO WATCH 643 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.

   TORNADO WATCH.

.DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY.

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION IS NOT EXPECTED AT THIS TIME.

PAZ004-005-010-191615-
WARREN-MCKEAN-ELK-
1215 PM EDT TUE SEP 18 2012

THIS HAZARDOUS WEATHER OUTLOOK IS FOR CENTRAL PENNSYLVANIA.

.DAY ONE...THIS AFTERNOON AND TONIGHT.

THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS THROUGH MID
AFTERNOON...ASSOCIATED WITH A POTENT COLD FRONT APPROACHING FROM
THE WEST. THE MAIN SEVERE WEATHER THREAT WILL BE DAMAGING WIND
GUSTS AND THE AREA MOST PRONE TO DAMAGING GUSTS WILL BE ACROSS THE
EASTERN HALF OF THE STATE.

.DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY.

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION IS NOT EXPECTED AT THIS TIME.

DEVOIR

In the hours before

Special weather statement, Sep 18, 11:24 AM EDT, 3 hours 47 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE STATE COLLEGE PA
1124 AM EDT TUE SEP 18 2012

PAZ036-064-065-181600-
ADAMS PA-FRANKLIN PA-YORK PA-
1124 AM EDT TUE SEP 18 2012

...SHOWERS WITH STRONG WIND GUSTS WILL AFFECT ADAMS...SOUTHEASTERN
FRANKLIN AND SOUTHWESTERN YORK COUNTIES...

AT 1120 AM EDT...SHOWERS WITH STRONG WIND GUSTS WERE LOCATED FROM
HEIDLERSBURG TO CARROLL VALLEY TO 12 MILES SOUTHEAST OF SMITHSBURG...
MOVING NORTHEAST AT 40 MPH.

WIND GUSTS TO 50 MPH ARE POSSIBLE WITH THESE SHOWERS. VERY HEAVY RAIN
WILL FALL FROM THESE SHOWERS...AND WILL CAUSE WATER TO POND ON ROADS
AND FILL POOR DRAINAGE AREAS. THESE SHOWERS WILL AFFECT LAKE
MEADE...WELLSVILLE...NEW OXFORD AND THOMASVILLE.

THIS WILL ALSO IMPACT THE FOLLOWING MAJOR ROADS...ROUTE 11...ROUTE
15...ROUTE 30...STATE ROAD 94...STATE ROAD 97.

LAT...LON 3972 7774 3998 7753 3999 7748 3996 7745
      3999 7740 4003 7719 4009 7711 4013 7698
      3994 7686 3971 7685

FORECASTER: RXR

Special weather statement, Sep 18, 11:32 AM EDT, 3 hours 39 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE STATE COLLEGE PA
1132 AM EDT TUE SEP 18 2012

PAZ028-050-056-181600-
JUNIATA PA-PERRY PA-SNYDER PA-
1132 AM EDT TUE SEP 18 2012

...A SHOWER WITH STRONG WIND GUSTS WILL AFFECT NORTHEASTERN
JUNIATA...NORTHEASTERN PERRY AND SNYDER COUNTIES...

AT 1130 AM EDT...A SHOWER WITH STRONG WIND GUSTS WAS NEAR PORT
ROYAL...MOVING NORTHEAST AT 45 MPH.

WIND GUSTS TO 50 MPH ARE POSSIBLE WITH THIS SHOWER. THIS SHOWER WILL
AFFECT RICHFIELD...MIDDLEBURG AND KRATZERVILLE.

THIS WILL IMPACT THE FOLLOWING MAJOR ROADS...ROUTE 11...ROUTE
11/15...ROUTE 15...ROUTE 322/22...ROUTE 522.

LAT...LON 4049 7750 4085 7716 4087 7708 4086 7702
      4087 7701 4089 7695 4088 7680 4080 7685
      4070 7686 4066 7692 4062 7695 4039 7734

FORECASTER: RXR

Special weather statement, Sep 18, 12:02 PM EDT, 3 hours 9 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE STATE COLLEGE PA
1202 PM EDT TUE SEP 18 2012

PAZ064-065-181645-
ADAMS PA-YORK PA-
1202 PM EDT TUE SEP 18 2012

...SHOWERS WITH STRONG WIND GUSTS WILL AFFECT ADAMS AND YORK
COUNTIES...

AT 1155 AM EDT...SHOWERS WITH STRONG WIND GUSTS WERE LOCATED FROM NEW
OXFORD TO 10 MILES SOUTH OF SABILLASVILLE...MOVING NORTHEAST AT 55
MPH.

WIND GUSTS TO 50 MPH ARE POSSIBLE WITH THESE SHOWERS. IN ADDITION...
VERY HEAVY RAIN WILL FALL FROM THESE SHOWERS...AND WILL CAUSE WATER
TO POND ON ROADS AND FILL POOR DRAINAGE AREAS. THESE SHOWERS WILL
AFFECT DOVER...MANCHESTER...MCSHERRYSTOWN...STEWARTSTOWN AND YORK.

THIS WILL IMPACT THE FOLLOWING CENTRAL PENNSYLVANIA INTERSTATES...THE
PENNSYLVANIA TURNPIKE BETWEEN MILE MARKERS 240 AND 245...I-83 BETWEEN
MILE MARKERS 1 AND 39.

THIS WILL ALSO IMPACT THE FOLLOWING MAJOR ROADS...ROUTE 15...ROUTE
30...STATE ROAD 94...STATE ROAD 97.

LAT...LON 4001 7730 4003 7719 4015 7703 4017 7695
      4016 7691 4019 7693 4019 7691 4020 7693
      4022 7690 4022 7684 4018 7676 4013 7674
      4006 7664 3972 7657 3972 7741

FORECASTER: RXR

Special weather statement, Sep 18, 12:07 PM EDT, 3 hours 4 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE STATE COLLEGE PA
1207 PM EDT TUE SEP 18 2012

PAZ049>053-181630-
COLUMBIA PA-MONTOUR PA-NORTHUMBERLAND PA-SNYDER PA-UNION PA-
1207 PM EDT TUE SEP 18 2012

...A SHOWER WITH STRONG WIND GUSTS WILL AFFECT CENTRAL COLUMBIA...
EAST CENTRAL UNION...EASTERN SNYDER...MONTOUR AND NORTHERN
NORTHUMBERLAND COUNTIES...

AT NOON EDT...A SHOWER WITH STRONG WIND GUSTS WAS NEAR FREEBURG...
MOVING NORTHEAST AT 50 MPH.

WIND GUSTS TO 50 MPH ARE POSSIBLE WITH THIS SHOWER. VERY HEAVY RAIN
WILL FALL FROM THIS SHOWER...AND WILL CAUSE WATER TO POND ON ROADS
AND FILL POOR DRAINAGE AREAS. THIS SHOWER WILL AFFECT MOORESBURG AND
JERSEYTOWN.

THIS WILL IMPACT I-80 BETWEEN MILE MARKERS 215 AND 241.

THIS WILL ALSO IMPACT THE FOLLOWING MAJOR ROADS...STATE HIGHWAY
147...ROUTE 11...ROUTE 11/15...ROUTE 15...ROUTE 522...STATE ROAD
45...STATE ROAD 61.

LAT...LON 4066 7701 4066 7702 4084 7707 4116 7664
      4116 7659 4125 7648 4105 7627

FORECASTER: RXR

Special weather statement, Sep 18, 12:46 PM EDT, 2 hours 25 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE STATE COLLEGE PA
1246 PM EDT TUE SEP 18 2012

PAZ051>053-181715-
COLUMBIA PA-MONTOUR PA-NORTHUMBERLAND PA-
1246 PM EDT TUE SEP 18 2012

...A SHOWER WITH STRONG WIND GUSTS WILL AFFECT CENTRAL
NORTHUMBERLAND...COLUMBIA AND SOUTHEASTERN MONTOUR COUNTIES...

AT 1236 PM EDT...A SHOWER WITH STRONG WIND GUSTS WAS NEAR
RIVERSIDE...MOVING NORTHEAST AT 40 MPH.

WIND GUSTS TO 50 MPH ARE POSSIBLE WITH THIS SHOWER. VERY HEAVY RAIN
WILL FALL FROM THIS SHOWER...AND WILL CAUSE WATER TO POND ON ROADS
AND FILL POOR DRAINAGE AREAS. THIS SHOWER WILL AFFECT
STILLWATER...CAMBRA AND RED ROCK.

THIS WILL IMPACT I-80 BETWEEN MILE MARKERS 221 AND 247.

THIS WILL ALSO IMPACT THE FOLLOWING MAJOR ROADS...ROUTE 11...STATE
ROAD 61...STATE ROAD 118.

LAT...LON 4083 7652 4083 7678 4107 7668 4131 7641
      4131 7631 4121 7632 4114 7627 4114 7623
      4114 7622 4103 7622 4096 7621

FORECASTER: RXR

Local storm report, Sep 18, 3:11 PM EDT, 0 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE STATE COLLEGE PA
311 PM EDT TUE SEP 18 2012

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0230 PM     FLASH FLOOD      GETTYSBURG              39.83N  77.23W
09/18/2012                   ADAMS              PA   911 CALL CENTER

            FLASH FLOODING AND ROAD CLOSURES REPORTED ACROSS ADAMS
            COUNTY.

&&

EVENT NUMBER CTP1200448

MACH

The office that day

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

Issued	Product	Office	Counties	Lasted
Sep 18, 10:10 AM EDT	Special Weather Statement	CTP	Fulton	35 min
Sep 18, 10:43 AM EDT	Special Weather Statement	CTP	Franklin	32 min
Sep 18, 11:24 AM EDT	Special Weather Statement	CTP	Adams	36 min
Sep 18, 11:32 AM EDT	Special Weather Statement	CTP	Juniata, Snyder	28 min
Sep 18, 12:02 PM EDT	Special Weather Statement	CTP	Adams, York	43 min
Sep 18, 12:07 PM EDT	Special Weather Statement	CTP	Columbia, Montour, Northumberland	23 min
Sep 18, 12:32 PM EDT	Severe Thunderstorm Warning	CTP	Adams, Lancaster, York	43 min
Sep 18, 12:46 PM EDT	Special Weather Statement	CTP	Columbia, Montour, Northumberland	29 min
Sep 18, 12:52 PM EDT	Areal Flood Advisory	CTP	Adams, Columbia, Cumberland, Dauphin, Lancaster, Lebanon and 5 more	3 hr
Sep 18, 1:16 PM EDT	Severe Thunderstorm Warning	CTP	Adams, York	59 min
Sep 18, 1:22 PM EDT	Severe Thunderstorm Warning	CTP	Dauphin, Lancaster, Lebanon, Schuylkill	53 min
Sep 18, 2:00 PM EDT	Flash Flood Warning	CTP	Adams, Cumberland, Dauphin, Lancaster, Lebanon, Schuylkill and 1 more	5 hr
Sep 18, 2:13 PM EDT	Severe Thunderstorm Warning	CTP	Adams, Cumberland, Dauphin, Lancaster, Lebanon, Schuylkill and 1 more	62 min
Sep 18, 3:18 PM EDT	Special Weather Statement	CTP	Schuylkill	57 min

Nearby

Severe Thunderstorm Warnings in Pennsylvania, 2012 Every severe thunderstorm warning in 2012

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.