Alert archive / Pennsylvania / Special Weather Statements in 2011

Special Weather Statement, NWS State College, PA

September 7, 2011Lancaster County, Pennsylvania

NWS State College, PA issued this special weather statement at Sep 7, 2011, 2:17 PM EDT for Lancaster County, Pennsylvania. It was in force for 13 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
Sep 7, 2011, 2:17 PM EDT (18:17 UTC)
Expired
Sep 7, 2011, 2:30 PM EDT
In force
13 min
Issued by
NWS State College, PA

County Lancaster County, PA

The radar

The Sterling radar (KLWX), 150 km from the middle of the area, began a volume at 18:20 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, 6.3 hours before the alert went out and 148 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 2011-09-07Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Washington/Dulle, VA at 12:00Z on 2011-09-07The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 154 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
1 J/kg
Mixed-layer CIN
-270 J/kg
Mixed-layer LCL
448 m above ground
0-6 km bulk shear
31 kt
0-1 km storm-relative helicity
154 m²/s²
0-3 km storm-relative helicity
184 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

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

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What forecasters said that day

The local office's own words before this special weather statement 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 special weather statement went out at Sep 7, 1:06 PM EDT, 1 hour 11 minutes earlier.

Area forecast discussion, Sep 7, 1:06 PM EDT, 1 hour 11 minutes before
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Hazardous weather outlook, Sep 7, 5:35 AM EDT, 8 hours 42 minutes before
HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE STATE COLLEGE PA
535 AM EDT WED SEP 7 2011

PAZ004>006-010>012-017>019-024>028-033>035-037-041-042-045-046-
049>053-080930-
WARREN-MCKEAN-POTTER-ELK-CAMERON-NORTHERN CLINTON-CLEARFIELD-
NORTHERN CENTRE-SOUTHERN CENTRE-CAMBRIA-BLAIR-HUNTINGDON-MIFFLIN-
JUNIATA-SOMERSET-BEDFORD-FULTON-TIOGA-NORTHERN LYCOMING-SULLIVAN-
SOUTHERN CLINTON-SOUTHERN LYCOMING-UNION-SNYDER-MONTOUR-
NORTHUMBERLAND-COLUMBIA-
535 AM EDT WED SEP 7 2011

...FLOOD WATCH IN EFFECT THROUGH THURSDAY EVENING...

THIS HAZARDOUS WEATHER OUTLOOK IS FOR CENTRAL PENNSYLVANIA.

.DAY ONE...TODAY AND TONIGHT.

PLEASE LISTEN TO NOAA WEATHER RADIO OR GO TO
WEATHER.GOV/STATECOLLEGE ON THE INTERNET FOR MORE
INFORMATION ABOUT THE FOLLOWING HAZARDS.

   FLOOD WATCH.

.DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY.

PLEASE LISTEN TO NOAA WEATHER RADIO OR GO TO
WEATHER.GOV/STATECOLLEGE ON THE INTERNET FOR MORE
INFORMATION ABOUT THE FOLLOWING HAZARDS.

   FLOOD WATCH.

.SPOTTER INFORMATION STATEMENT...

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

PAZ036-056>059-063>066-080930-
FRANKLIN-PERRY-DAUPHIN-SCHUYLKILL-LEBANON-CUMBERLAND-ADAMS-YORK-
LANCASTER-
535 AM EDT WED SEP 7 2011

...FLOOD WATCH IN EFFECT THROUGH THURSDAY EVENING...

THIS HAZARDOUS WEATHER OUTLOOK IS FOR CENTRAL PENNSYLVANIA.

.DAY ONE...TODAY AND TONIGHT.

PLEASE LISTEN TO NOAA WEATHER RADIO OR GO TO
WEATHER.GOV/STATECOLLEGE ON THE INTERNET FOR MORE
INFORMATION ABOUT THE FOLLOWING HAZARDS.

   FLOOD WATCH.

IN ADDITION TO THE THREAT OF FLOODING...THERE IS SLIGHT CHANCE
FOR STRONG TO SEVERE THUNDERSTORMS TODAY. SOME OF THE STORMS COULD
LINGER INTO THE EARLY EVENING HOURS. SOME STORMS COULD PRODUCE
STRONG WINDS AND EVEN AN ISOLATED TORNADO.

.DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY.

PLEASE LISTEN TO NOAA WEATHER RADIO OR GO TO
WEATHER.GOV/STATECOLLEGE ON THE INTERNET FOR MORE
INFORMATION ABOUT THE FOLLOWING HAZARDS.

   FLOOD WATCH.

.SPOTTER INFORMATION STATEMENT...

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

MARTIN

In the hours before

Local storm report, Sep 7, 11:35 AM EDT, 2 hours 42 minutes before
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Local storm report, Sep 7, 11:56 AM EDT, 2 hours 21 minutes before
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Local storm report, Sep 7, 1:20 PM EDT, 57 minutes before
PRELIMINARY LOCAL STORM REPORT...SUMMARY
NATIONAL WEATHER SERVICE STATE COLLEGE PA
120 PM EDT WED SEP 07 2011

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

1115 AM     FLOOD            2 N STATE COLLEGE       40.82N  77.86W
09/07/2011                   CENTRE             PA   NEWSPAPER

            FOX HOLLOW ROAD IS CLOSED NEAR TOFTREES DUE TO
            FLOODING.

0113 PM     FLASH FLOOD      FELTON                  39.86N  76.56W
09/07/2011                   YORK               PA   911 CALL CENTER

            EVACUATIONS ONGOING IN FELTON DUE TO FLOODING.

0115 PM     FLASH FLOOD      DOVER                   40.00N  76.85W
09/07/2011                   YORK               PA   911 CALL CENTER

            EVACUATIONS ONGOING IN DOVER DUE TO FLOODING.

0116 PM     FLASH FLOOD      YORK                    39.96N  76.73W
09/07/2011                   YORK               PA   911 CALL CENTER

            NUMEROUS WATER RESCUES REPORTED ACROSS YORK COUNTY.

&&

EVENT NUMBER CTP1100407 CTP1100408 CTP1100409 CTP1100410

EVANEGO
Special weather statement, Sep 7, 1:22 PM EDT, 55 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE STATE COLLEGE PA
122 PM EDT WED SEP 7 2011

PAZ059-066-071745-
LANCASTER PA-LEBANON PA-
122 PM EDT WED SEP 7 2011

...A THUNDERSTORM WITH HEAVY RAIN WILL AFFECT EASTERN LEBANON AND
NORTHWESTERN LANCASTER COUNTIES...

AT 114 PM EDT...A STRONG THUNDERSTORM WAS NEAR MOUNT JOY...MOVING
NORTHEAST AT 45 MPH.

WIND GUSTS TO 40 MPH ARE POSSIBLE WITH THIS STORM. VERY HEAVY RAIN
WILL FALL FROM THIS STORM...AND WILL CAUSE WATER TO POND ON ROADS AND
FILL POOR DRAINAGE AREAS. THE RAIN WILL CAUSE RAPID RISES ON SMALL
STREAMS AND CREEKS. THIS STORM WILL AFFECT CORNWALL AND MYERSTOWN.

FLOOD AND FLASH FLOOD WARNINGS ARE ALREADY IN EFFECT FOR THIS ENTIRE
AREA.

SLIGHT ROTATION HAS BEEN DETECTED IN THIS STORM. BE PREPARED TO TAKE
ACTION IF A SEVERE THUNDERSTORM OR TORNADO WARNING IS ISSUED.

LAT...LON 4004 7636 4009 7659 4050 7643 4032 7616

FORECASTER: DANGELO
Local storm report, Sep 7, 1:48 PM EDT, 29 minutes before
PRELIMINARY LOCAL STORM REPORT...SUMMARY
NATIONAL WEATHER SERVICE STATE COLLEGE PA
148 PM EDT WED SEP 07 2011

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

0115 PM     FLASH FLOOD      CAMPBELLTOWN            40.28N  76.58W
09/07/2011                   LEBANON            PA   PUBLIC

            PONDING OF WATER ON ROADWAYS ACROSS LEBANON COUNTY.

0136 PM     FLASH FLOOD      ELIZABETHTOWN           40.15N  76.60W
09/07/2011                   LANCASTER          PA   TRAINED SPOTTER

            CONOY CREEK OUT OF ITS BANKS. NORTH MARKET STREET
            CLOSED.

0140 PM     FLASH FLOOD      WEIGELSTOWN             39.99N  76.83W
09/07/2011                   YORK               PA   AMATEUR RADIO

            ROUTE 74 CLOSED DUE TO FLOODING NEAR WEST MANCHESTER
            TWP AND DOVER TWP LINE.

&&

EVENT NUMBER CTP1100413 CTP1100411 CTP1100412

EVANEGO
Special weather statement, Sep 7, 2:17 PM EDT, 0 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE STATE COLLEGE PA
217 PM EDT WED SEP 7 2011

PAZ065-066-071830-
LANCASTER PA-YORK PA-
217 PM EDT WED SEP 7 2011

...A STRONG THUNDERSTORM WILL AFFECT CENTRAL YORK AND WESTERN
LANCASTER COUNTIES...

AT 213 PM EDT...A STRONG THUNDERSTORM WAS NEAR WINDSOR...MOVING NORTH
AT 50 MPH.

WIND GUSTS TO 50 MPH ARE POSSIBLE WITH THIS STORM. VERY HEAVY RAIN
WILL FALL FROM THIS STORM...AND WILL CAUSE WATER TO POND ON ROADS AND
FILL POOR DRAINAGE AREAS. THE RAIN WILL CAUSE RAPID RISES ON SMALL
STREAMS AND CREEKS. DOPPLER RADAR HAS DETECTED SOME ROTATION IN THIS
STORM. BE PREPARED TO TAKE ACTION IF A SEVERE THUNDERSTORM OR
TORNADO WARNING IS ISSUED.

THIS STORM WILL AFFECT MANCHESTER...COLUMBIA...MOUNT JOY AND MANHEIM.

THIS WILL IMPACT THE FOLLOWING CENTRAL PENNSYLVANIA INTERSTATES...THE
PENNSYLVANIA TURNPIKE BETWEEN MILE MARKERS 265 AND 276...I-83 BETWEEN
MILE MARKERS 12 AND 19.

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

LAT...LON 3989 7670 4014 7669 4021 7654 4024 7643
      4025 7630 4028 7624 3984 7648

FORECASTER: DANGELO

The office that day

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

IssuedProductOfficeCountiesLasted
Sep 6, 8:32 PM EDTAreal Flood WarningCTPFranklin, Fulton, Huntingdon, Juniata, Mifflin, Perry16 hr
Sep 6, 10:20 PM EDTAreal Flood WarningCTPColumbia, Cumberland, Dauphin, Lycoming, Montour, Northumberland and 3 more14 hr
Sep 6, 11:24 PM EDTRiver Flood WarningCTPHuntingdon22 hr
Sep 6, 11:24 PM EDTRiver Flood WarningCTPClinton31 hr
Sep 6, 11:24 PM EDTRiver Flood WarningCTPBedford18 hr
Sep 7, 2:53 AM EDTAreal Flood AdvisoryCTPBlair, Cambria, Cameron, Centre, Clearfield, Clinton and 8 more6 hr
Sep 7, 4:49 AM EDTRiver Flood WarningCTPLycoming, Sullivan41 hr
Sep 7, 6:15 AM EDTAreal Flood WarningCTPCentre, Clinton, Lycoming6 hr
Sep 7, 6:40 AM EDTSpecial Weather StatementCTPMifflin35 min
Sep 7, 8:32 AM EDTAreal Flood AdvisoryCTPAdams, York3 hr
Sep 7, 9:33 AM EDTFlash Flood Warning EmergencyCTPDauphin, Lancaster, Lebanon, York10 hr
Sep 7, 10:23 AM EDTFlash Flood Warning EmergencyCTPColumbia, Dauphin, Lycoming, Montour, Northumberland, Schuylkill and 4 more12 hr
Sep 7, 11:22 AM EDTRiver Flood WarningCTPHuntingdon, Mifflin6 hr
Sep 7, 11:22 AM EDTRiver Flood WarningCTPHuntingdon, Juniata, Mifflin10 hr
Sep 7, 11:22 AM EDTRiver Flood WarningCTPJuniata, Perry10 hr
Sep 7, 11:22 AM EDTRiver Flood WarningCTPColumbia4 days
Sep 7, 11:22 AM EDTRiver Flood WarningCTPColumbia, Montour, Northumberland4 days
Sep 7, 11:22 AM EDTRiver Flood WarningCTPDauphin, Juniata, Northumberland, Perry, Union4 days
Sep 7, 11:22 AM EDTRiver Flood WarningCTPCumberland, Dauphin, Juniata, Lancaster, Northumberland, Perry and 2 more4 days
Sep 7, 11:22 AM EDTRiver Flood WarningCTPLancaster, York4 days
Sep 7, 11:22 AM EDTRiver Flood WarningCTPLycoming49 hr
Sep 7, 11:22 AM EDTRiver Flood WarningCTPLycoming, Northumberland, Union49 hr
Sep 7, 11:22 AM EDTRiver Flood WarningCTPNorthumberland, Union44 hr
Sep 7, 11:22 AM EDTRiver Flood WarningCTPNorthumberland, Union44 hr
Sep 7, 11:22 AM EDTRiver Flood WarningCTPNorthumberland, Union53 hr
Sep 7, 12:09 PM EDTAreal Flood WarningCTPAdams, Centre, Clinton, Columbia, Cumberland, Dauphin and 17 more12 hr
Sep 7, 1:22 PM EDTSpecial Weather StatementCTPLebanon23 min
Sep 7, 2:56 PM EDTSpecial Weather StatementCTPLancaster34 min
Sep 7, 3:28 PM EDTRiver Flood WarningCTPLancaster, York44 hr
Sep 7, 4:14 PM EDTFlash Flood Warning EmergencyCTPSchuylkill6 hr
Sep 7, 7:00 PM EDTFlash Flood Warning EmergencyCTPDauphin, Lancaster, Lebanon, York6 hr
Sep 7, 7:46 PM EDTSpecial Weather StatementCTPSchuylkill29 min

Nearby

Special Weather Statements in Pennsylvania, 2011Every special weather statement in 2011

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.