Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2009

Severe Thunderstorm Warning 99, NWS State College, PA

July 23, 2009Juniata County, Northumberland County, Snyder County, Pennsylvania

NWS State College, PA issued this severe thunderstorm warning at Jul 23, 2009, 8:02 PM EDT for Juniata County, Northumberland County, Snyder County, Pennsylvania. It was in force for 43 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: Jul 23, 2009, 8:02 PM EDT (00:02 UTC)
Expired: Jul 23, 2009, 8:45 PM EDT
In force: 43 min
Issued by: NWS State College, PA
Area: Storm-based polygon

Counties Juniata County, PA, Northumberland County, PA, Snyder County, PA

The radar

The State College radar (KCCX), 89 km from the middle of the area, began a volume at 00:03 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.

Did it verify

Not verified. The Iowa Environmental Mesonet's Cow found no qualifying storm report inside this severe thunderstorm warning while it was in force. That is not proof nothing happened: reports are thin where few people live.

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 nearest sounding before it

Washington/Dulle, VA (KIAD), launched 00:00Z, 0.0 hours before the alert went out and 207 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: 2022 J/kg
Mixed-layer CIN: -14 J/kg
Mixed-layer LCL: 777 m above ground
0-6 km bulk shear: 36 kt
0-1 km storm-relative helicity: 79 m²/s²
0-3 km storm-relative helicity: 99 m²/s²
Significant tornado parameter: 0.9
Supercell composite: 4.5

Open this sounding in Storm Lab

The text

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

000 
WUUS51 KCTP 240002
SVRCTP
PAC067-097-109-240045-
/O.NEW.KCTP.SV.W.0099.090724T0002Z-090724T0045Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE STATE COLLEGE PA
802 PM EDT THU JUL 23 2009

THE NATIONAL WEATHER SERVICE IN STATE COLLEGE PA HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHEASTERN JUNIATA COUNTY IN CENTRAL PENNSYLVANIA...
  SNYDER COUNTY IN CENTRAL PENNSYLVANIA...
  SOUTHWESTERN NORTHUMBERLAND COUNTY IN CENTRAL PENNSYLVANIA...

* UNTIL 845 PM EDT

* AT 802 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM.  THIS STORM WAS LOCATED NEAR FREMONT...OR 12
  MILES SOUTHWEST OF SELINSGROVE...AND MOVING NORTHEAST AT 15 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  FREMONT AND MIDDLEBURG AROUND 815 PM EDT...
  MEISERVILLE AROUND 820 PM EDT...
  PORT TREVERTON AROUND 840 PM EDT...
  SELINSGROVE AND RESLER AROUND 845 PM EDT...

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

LAT...LON 4060 7713 4076 7722 4088 7692 4088 7683
      4091 7685 4092 7681 4066 7679
TIME...MOT...LOC 0003Z 247DEG 12KT 4071 7706

$$

FORECASTER: JUNG

1 follow-up statement

000 
WWUS51 KCTP 240041
SVSCTP

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE STATE COLLEGE PA
841 PM EDT THU JUL 23 2009

PAC067-097-109-240049-
/O.EXP.KCTP.SV.W.0099.000000T0000Z-090724T0045Z/
JUNIATA PA-SNYDER PA-NORTHUMBERLAND PA-
841 PM EDT THU JUL 23 2009

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHWESTERN NORTHUMBERLAND...
SNYDER AND NORTHEASTERN JUNIATA COUNTIES WILL EXPIRE AT 845 PM EDT...

DOPPLER RADAR INDICATES THE THUNDERSTORM OVER SNYDER COUNTY HAS 
WEAKENED. NO DAMAGE HAS BEEN REPORTED.

LAT...LON 4060 7713 4076 7722 4088 7692 4088 7683
      4091 7685 4092 7681 4066 7679
TIME...MOT...LOC 0039Z 247DEG 12KT 4076 7691

$$

FORECASTER: JUNG

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 Jul 23, 3:15 PM EDT, 4 hours 47 minutes earlier.

Area forecast discussion, Jul 23, 3:15 PM EDT, 4 hours 47 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE STATE COLLEGE PA
315 PM EDT THU JUL 23 2009

.SYNOPSIS...
A STUBBORN UPPER LEVEL TROUGH OVER THE GREAT LAKES WILL KEEP
SHOWERS AND THUNDERSTORMS IN THE FORECAST THROUGH THE WEEKEND.

&&

.NEAR TERM /THROUGH FRIDAY/...
A SLOW MOVING COLD FRONT WILL SLOW EVEN FURTHER AS IT CROSSES
CENTRAL PA TONIGHT...REACHING A HALT OVER THE SUSQUEHANNA RIVER
VALLY AROUND 12Z FRIDAY. AT THE SAME TIME...AN ANOMALOUSLY DEEP
SURFACE LOW WILL TRACK UP THE EASTERN SEABOARD TO SOUTHERN NEW
ENGLAND AND TAP 2+ PWATS AS IT DOES SO. SIGNIFICANTLY DECREASING
DEEP LAYER MOISTURE WILL FOLLOW AS THE STORM MOVES AWAY ON FRIDAY
WITH PWATS DECREASING BELOW ONE INCH OVER PORTIONS OF CENTRAL AND
WESTERN PA IN THE AFTERNOON.

FOR THE NEAR TERM...RICH DEEP LAYER MOISTURE WITH PWATS IN EXCESS
OF 1.5 AND DEFORMATION BETWEEN THE COASTAL AND ERN GLAKS LOW
CIRCULATIONS AS WELL AS THE ADVANCING DRY SLOT ALOFT WILL MAINTAIN
NUMEROUS SHOWERS AND ISOLATED THUNDERSTORMS. SHEAR IS LACKING FOR
SEVERE...BUT STORMS ARE CAPABLE OF PRODUCING LOCALLY HEAVY
RAINFALL. LOCAL 2 TO 3 INCH AMOUNTS OCCURRED EARLIER TODAY OVER
SOUTHERN YORK COUNTY. FORTUNATELY...BOUNDARY LAYER FLOW 20 TO 25
KTS IS KEEPING CELLS MOVING RIGHT ALONG THIS AFTERNOON WHICH IS A
DIMINISHING FACTOR FOR ANY THREAT OF FLOODING. WILL NEED TO WATCH
THE NORTHWEST AND FAR SOUTHEAST CLOSELY DUE TO RECENT HEAVY
RAINFALL.

18 HOUR RAINFALL THROUGH EARLY FRIDAY MORNING STILL AVERAGING
BETWEEN ONE QUARTER TO ONE HALF INCH. WILL WATCH CAREFULLY AS THE
FRONT SLOWS FURTHER THIS EVENING OVER THE LOWER SUSQ. AS THERE MAY
BE AN AREA OF TRAINING CELLS FROM THE RIGDE AND VALLEY REGION OF
CENTRAL PA SOUTHWARD THROUGH THE LOWER SUSQ.

UPPER LOW LIFTING NE ACROSS THE EASTERN GRT LKS ON FRIDAY. EARLY
LOW CLOUDS SHOULD MIX OUT TO PARTLY SUNNY SKIES...RESULTING IN
MODERATE INSTABILITY BY AFTN WITH ENS MEAN CAPES ARND 1200J/KG.
THUS...GIVEN COLD TEMPS ALOFT...CAN/T RULE OUT ISOLATED LARGE HAIL
WITH A FEW OF THE STORMS.

&&

.SHORT TERM /FRIDAY NIGHT THROUGH SATURDAY/...
FORECAST CHALLENGES FOR FRI NGT THRU SAT RESIDE WITH INTENSITY OF
OVERNIGHT FOG...AND AFT MAX T/S ACROSS PORTIONS OF THE SUSQ-RIVER
VALLEY.

ATTM 500MB HEIGHTS MARGINALLY INCREASE ON THE NORTHERN PERIPHERY OF
A WEAK RIDGE. ENSEMBLES HAVE A HIGH CONFIDENCE WITH STEADY LIFT
NORTH OF A MID-LVL VORT MAX INTO SOUTHERN ONTARIO...AS NEGATIVELY
TILTED TROUGH AXIS RETROGRADES AND FOCUSES TOWARDS MIDWEST REGION
FOR SAT. ANTICIPATE DEW PT/S REMAINING ELEVATED IN THE UPPER 50S/LOW
60S OVERNIGHT WITH A VERY MILD NGT. PATCHY FOG SHUD EASILY DEVELOP
FROM A MOIST BNDRY LYR...AND LINGER THRU SUNRISE.

PWAT VALUES REMAIN SEASONAL ARND 1.2 TO 1.5 INCHES SAT AFTN.
INSTABILITY REMAINS MARGINAL WITH NEAR SFC LAPSE RATES
STEEPENING...HOWEVER REMAINS DISCONNECTED TO MID-LVL LAPSE RATES
WHICH REMAIN MINIMAL. SHEAR REMAINS UNI-DIRECTIONAL...WITH A GRADUAL
INCREASE IN THE 1-3KM RANGE OF 15 TO 20 KTS FROM SW. PARCELS SHUD
EASILY BE SATURATED WITH MINIMAL LIFT...HOWEVER NOT MUCH VERTICAL
MOTION ANTICIPATED SO ATTM GOING WITH A PREDOMINANTLY DRY SAT AFTN.
CAN/T RULE OUT AN ISO SHRA/TSRA...SO HAVE A 20 POP REMAINING
SUPPORTED BY A COUPLE ENSEMBLE MEMBERS. 850MB THERMAL RIDGE PUSHES
17 TO 19 DEG C AIR INTO CENTRAL/SOUTHERN PORTIONS OF CWFA...COUPLED
WITH MINIMAL SOLAR FILTERING AND WE SHUD BE SEEING VERY WARM/MUGGY
CONDS. ANTICIPATE NEAR 90 DEGREES IN SOME OF THE VALLEYS ACROSS THE
LOWER SUSQ-VALLEY...TO LOW/MID 80S ACROSS CENTRAL/NW MTNS OF CWFA.

&&

.LONG TERM /SATURDAY NIGHT THROUGH THURSDAY/...
BIT OF UNCERTAINTY RIGHT AWAY IN THIS PERIOD ON SUNDAY...AS TIMING
OF FROPA HAS BEEN CHANGING WITH EACH MODEL RUN. HENCE KEPT POPS
MODERATELY HIGH THROUGHOUT THE DAY TO REPRESENT UNCERTAINTY. HOWEVER
IT APPEARS THE FROPA IS TRENDING LATER AND LATER INTO SUNDAY...AND
AT THIS POINT...HIGHEST CONFIDENCE SOLUTION SEEMS TO BRING IT
THROUGH AROUND 18Z. CHC FOR SOME HEAVY RAINFALL WITH THIS FRONT AS
WELL...WITH 12Z GEFS SHOWING A 90% CHC OF 24HR QPF OVER A HALF AN
INCH SUNDAY EVENING THROUGH MONDAY EVENING FOR NEARLY ALL OF THE
CWA.

12Z GEFS ALSO SUGGESTS COLD FRONT WILL BE SLOW TO CLEAR PA...HENCE
KEPT A CHC OF SHRA/TSRA IN THE FORECAST FOR MONDAY...ESP IN THE SE.
AFTER THIS...GFS TRENDS TOWARD THE 500MB TROUGH AXIS SHIFTING
FURTHER WEST...WITH MID ATLANTIC RIDE EDGING INTO THE AREA. WHILE
THE DAILY CHANCE OF SHOWERS AND THUNDERSTORMS WILL LIKELY REMAIN
NEXT WEEK...AS SHORT WAVES CONTINUE TO SPIN AROUND UPPER LOW
THROUGH PA...PERSISTED S/SE WILL BRING WARMER CONDITIONS...WITH
TEMPERATURES IN LOWER SUSQUEHANNA REACHING THE MID TO UPPER
EIGHTIES FOR MOST OF THE WEEK.

&&

.AVIATION /19Z THURSDAY THROUGH TUESDAY/...
NMRS SHOWERS AND SCT TSRA XPCD THIS EVENING ALONG AND AHEAD OF
COLD FRONT WHICH WILL STALL OVER THE LOWER SUSQUEHANNA RIVER VALLY
BY EARLY FRIDAY. MVFR CIGS WILL TREND DOWNWARD WITH FAIRLY
WIDESPREAD FOG FORMATION AFTER MIDNIGHT AND AREAS OF IFR. SHOWERS
AND ISOLATED THUNDERSTORMS WILL PERSIST ON FRIDAY AS AN UPPER
LEVEL TROF PASSES NE OF THE AREA.

OUTLOOK...
SAT...MAINLY VFR.
SUN...MVFR IN SHRA.
MON...MAINLY VFR.
TUE...MAINLY VFR...SCT MVFR IN AFTN SHRA.

&&

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

&&

SYNOPSIS...FITZGERALD/STEINBUGL
NEAR TERM...DEVOIR
SHORT TERM...BEACHLER
LONG TERM...BEACHLER/DICKEY
AVIATION...DEVOIR/STEINBUGL

Hazardous weather outlook, Jul 23, 5:02 AM EDT, 15 hours before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE STATE COLLEGE PA
502 AM EDT THU JUL 23 2009

PAZ004>006-010>012-017>019-024>028-033>037-041-042-045-046-049>053-
056>059-063>066-240915-
WARREN-MCKEAN-POTTER-ELK-CAMERON-NORTHERN CLINTON-CLEARFIELD-
NORTHERN CENTRE-SOUTHERN CENTRE-CAMBRIA-BLAIR-HUNTINGDON-MIFFLIN-
JUNIATA-SOMERSET-BEDFORD-FULTON-FRANKLIN-TIOGA-NORTHERN LYCOMING-
SULLIVAN-SOUTHERN CLINTON-SOUTHERN LYCOMING-UNION-SNYDER-MONTOUR-
NORTHUMBERLAND-COLUMBIA-PERRY-DAUPHIN-SCHUYLKILL-LEBANON-CUMBERLAND-
ADAMS-YORK-LANCASTER-
502 AM EDT THU JUL 23 2009

THIS HAZARDOUS WEATHER OUTLOOK IS FOR CENTRAL PENNSYLVANIA.

.DAY ONE...TODAY AND TONIGHT.

THE PROBABILITY FOR WIDESPREAD HAZARDOUS WEATHER IS LOW.

.DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY.

THE PROBABILITY FOR WIDESPREAD HAZARDOUS WEATHER IS LOW.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION IS NOT EXPECTED AT THIS TIME.

In the hours before

Local storm report, Jul 23, 7:10 PM EDT, 52 minutes before

PRELIMINARY LOCAL STORM REPORT...CORRECTED
NATIONAL WEATHER SERVICE STATE COLLEGE PA
710 PM EDT THU JUL 23 2009

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

0522 PM     FLASH FLOOD      5 S CHAMBERSBURG        39.86N 77.66W
07/23/2009                   FRANKLIN           PA   TRAINED SPOTTER

            FLOODING ON I-81 FROM MILE MARKER 10 TO MILE MARKER 13.
            ABOUT 4 INCHES OF WATER ON ROADWAY CAUSED TRAFFIC
            PROBLEMS.

0530 PM     FLASH FLOOD      2 N CHAMBERSBURG        39.96N 77.66W
07/23/2009                   FRANKLIN           PA   TRAINED SPOTTER

            3 TO 5 FEET OF WATER AT SEVERAL DWELLINGS ON ECHO ROAD
            AND DOUGLAS ROAD IN NORTH MIDDLETON TOWNSHIP. WATER OVER
            MAILBOXES.

0535 PM     TSTM WND DMG     CHAMBERSBURG            39.93N 77.66W
07/23/2009                   FRANKLIN           PA   TRAINED SPOTTER

            TREES AND POWER LINES DOWN IN AND AROUND CHAMBERSBURG.

0545 PM     FLASH FLOOD      NEWVILLE                40.17N 77.40W
07/23/2009                   CUMBERLAND         PA   TRAINED SPOTTER

            FLOODING ON I-76 /PA TURNPIKE/.

0600 PM     HEAVY RAIN       SCOTLAND                39.96N 77.59W
07/23/2009  M4.70 INCH       FRANKLIN           PA   TRAINED SPOTTER

            4.7 INCHES OF RAIN FELL BETWEEN 330 PM AND 6 PM.

0625 PM     FLASH FLOOD      4 SSE MECHANICSBURG     40.16N 76.98W
07/23/2009                   CUMBERLAND         PA   TRAINED SPOTTER

            SEVERAL RESIDENTS IN UPPER ALLEN TOWNSHIP NEEDED TO BE
            RESCUED FROM FLOODED HOMES.

&&

MACH

Special weather statement, Jul 23, 7:17 PM EDT, 45 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE STATE COLLEGE PA
717 PM EDT THU JUL 23 2009

PAZ028-049-050-052-240015-
JUNIATA PA-NORTHUMBERLAND PA-SNYDER PA-UNION PA-
717 PM EDT THU JUL 23 2009

...A STRONG THUNDERSTORM WILL AFFECT NORTHEASTERN JUNIATA...SNYDER...
SOUTHEASTERN UNION AND WEST CENTRAL NORTHUMBERLAND COUNTIES...

AT 716 PM EDT...A STRONG THUNDERSTORM WAS LOCATED 18 MILES SOUTHWEST
OF MIFFLINBURG...MOVING NORTHEAST AT 15 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 BE NEAR BEAVER SPRINGS AROUND 725 PM...RICHFIELD
AROUND 730 PM...BEAVERTOWN AROUND 735 PM...TROXELVILLE AROUND 740
PM...FREMONT AROUND 755 PM AND MIDDLEBURG AROUND 800 PM.

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

LAT...LON 4058 7725 4068 7735 4070 7731 4070 7735
      4071 7736 4074 7736 4102 7695 4080 7675

EXPERIMENTAL

FORECASTER: MARTIN

Special weather statement, Jul 23, 7:25 PM EDT, 37 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE STATE COLLEGE PA
725 PM EDT THU JUL 23 2009

PAZ041-046-240015-
NORTHERN LYCOMING PA-SOUTHERN LYCOMING PA-
725 PM EDT THU JUL 23 2009

...A STRONG THUNDERSTORM WILL AFFECT EASTERN LYCOMING COUNTY...

AT 723 PM EDT...A STRONG THUNDERSTORM WAS LOCATED 3 MILES SOUTH OF
WILLIAMSPORT...MOVING NORTHEAST AT 25 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 BE NEAR SOUTH WILLIAMSPORT AROUND 730 PM...
MONTOURSVILLE AROUND 740 PM...LOYALSOCKVILLE AROUND 750 PM...MUNCY
AROUND 800 PM...PICTURE ROCKS AROUND 810 PM AND LAIRDSVILLE AROUND
820 PM.

THIS WILL IMPACT I-180 BETWEEN MILE MARKERS 10 AND 29.

THIS WILL ALSO IMPACT THE FOLLOWING MAJOR ROADS...ROUTE 15...ROUTE
220...STATE ROAD 14...STATE ROAD 118.

LAT...LON 4148 7677 4141 7675 4131 7661 4131 7659
      4123 7651 4117 7673 4118 7678 4116 7688
      4114 7690 4115 7696 4110 7697 4108 7709
      4123 7720 4158 7688

EXPERIMENTAL

FORECASTER: JUNG

Local storm report, Jul 23, 7:26 PM EDT, 36 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE STATE COLLEGE PA
726 PM EDT THU JUL 23 2009

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

0715 PM     FLASH FLOOD      2 N BEECH CREEK         41.10N 77.59W
07/23/2009                   CLINTON            PA   EMERGENCY MNGR

            ROADS FLOODED

0715 PM     FLASH FLOOD      AVIS                    41.19N 77.32W
07/23/2009                   CLINTON            PA   EMERGENCY MNGR

            MUD SLIDE ACROSS ROAD

0715 PM     FLASH FLOOD      4 W AVIS                41.19N 77.39W
07/23/2009                   CLINTON            PA   EMERGENCY MNGR

            CHATHAM RUN OUT OF ITS BANKS AT GRAVEL HILL RD

0715 PM     FLASH FLOOD      7 N LOCK HAVEN          41.24N 77.45W
07/23/2009                   CLINTON            PA   EMERGENCY MNGR

            ROADWAY WASHING AWAY AT MIDDLE HILL ROAD AND COUDERSPORT
            PIKE.

&&

DANGELO

Local storm report, Jul 23, 7:57 PM EDT, 5 minutes before

PRELIMINARY LOCAL STORM REPORT...CORRECTED
NATIONAL WEATHER SERVICE STATE COLLEGE PA
757 PM EDT THU JUL 23 2009

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

0530 PM     FLASH FLOOD      2 N CARLISLE            40.23N 77.20W
07/23/2009                   CUMBERLAND         PA   TRAINED SPOTTER

            3 TO 5 FEET OF WATER AT SEVERAL DWELLINGS ON ECHO ROAD IN
            NORTH MIDDLETON TOWNSHIP. WATER OVER MAILBOXES.

&&

DANGELO

Local storm report, Jul 23, 7:58 PM EDT, 4 minutes before

PRELIMINARY LOCAL STORM REPORT...SUMMARY
NATIONAL WEATHER SERVICE STATE COLLEGE PA
758 PM EDT THU JUL 23 2009

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

0522 PM     FLASH FLOOD      5 S CHAMBERSBURG        39.86N 77.66W
07/23/2009                   FRANKLIN           PA   TRAINED SPOTTER

            FLOODING ON I-81 FROM MILE MARKER 10 TO MILE MARKER 13.
            ABOUT 4 INCHES OF WATER ON ROADWAY CAUSED TRAFFIC
            PROBLEMS.

0530 PM     FLASH FLOOD      2 N CARLISLE            40.23N 77.20W
07/23/2009                   CUMBERLAND         PA   TRAINED SPOTTER

            3 TO 5 FEET OF WATER AT SEVERAL DWELLINGS ON ECHO ROAD IN
            NORTH MIDDLETON TOWNSHIP. WATER OVER MAILBOXES.

0535 PM     TSTM WND DMG     CHAMBERSBURG            39.93N 77.66W
07/23/2009                   FRANKLIN           PA   TRAINED SPOTTER

            TREES AND POWER LINES DOWN IN AND AROUND CHAMBERSBURG.

0545 PM     FLASH FLOOD      NEWVILLE                40.17N 77.40W
07/23/2009                   CUMBERLAND         PA   TRAINED SPOTTER

            FLOODING ON I-76 /PA TURNPIKE/.

0600 PM     HEAVY RAIN       SCOTLAND                39.96N 77.59W
07/23/2009  M4.70 INCH       FRANKLIN           PA   TRAINED SPOTTER

            4.7 INCHES OF RAIN FELL BETWEEN 330 PM AND 6 PM.

0625 PM     FLASH FLOOD      4 SSE MECHANICSBURG     40.16N 76.98W
07/23/2009                   CUMBERLAND         PA   TRAINED SPOTTER

            SEVERAL RESIDENTS IN UPPER ALLEN TOWNSHIP NEEDED TO BE
            RESCUED FROM FLOODED HOMES.

0715 PM     FLASH FLOOD      2 N BEECH CREEK         41.10N 77.59W
07/23/2009                   CLINTON            PA   EMERGENCY MNGR

            ROADS FLOODED

0715 PM     FLASH FLOOD      7 N LOCK HAVEN          41.24N 77.45W
07/23/2009                   CLINTON            PA   EMERGENCY MNGR

            ROADWAY WASHING AWAY AT MIDDLE HILL ROAD AND COUDERSPORT
            PIKE.

0715 PM     FLASH FLOOD      4 W AVIS                41.19N 77.39W
07/23/2009                   CLINTON            PA   EMERGENCY MNGR

            CHATHAM RUN OUT OF ITS BANKS AT GRAVEL HILL RD

0715 PM     FLASH FLOOD      AVIS                    41.19N 77.32W
07/23/2009                   CLINTON            PA   EMERGENCY MNGR

            MUD SLIDE ACROSS ROAD

&&

DANGELO

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 23, 8:16 PM EDT	Special Weather Statement	CTP	Dauphin	59 min
Jul 23, 8:19 PM EDT	Areal Flood Advisory	CTP	Columbia, Lycoming, Montour, Northumberland, Snyder, Sullivan	3 hr
Jul 23, 9:26 PM EDT	Areal Flood Warning	CTP	Clinton, Lycoming	109 min
Jul 23, 9:57 PM EDT	Special Weather Statement	CTP	Adams, York	78 min
Jul 23, 10:46 PM EDT	Areal Flood Warning	CTP	York	2 hr
Jul 23, 11:12 PM EDT	Special Weather Statement	CTP	York	78 min
Jul 24, 2:08 AM EDT	River Flood Warning	CTP	Cumberland, York	7 hr
Jul 24, 1:24 PM EDT	Special Weather Statement	CTP	Huntingdon	66 min
Jul 24, 2:29 PM EDT	Special Weather Statement	CTP	Cumberland, Franklin, Juniata, Perry	61 min
Jul 24, 3:20 PM EDT	Special Weather Statement	CTP	Cumberland, Dauphin, Franklin	40 min
Jul 24, 3:57 PM EDT	Special Weather Statement	CTP	Lebanon, York	33 min
Jul 24, 3:58 PM EDT	Special Weather Statement	CTP	Franklin	47 min
Jul 24, 4:16 PM EDT	Severe Thunderstorm Warning	CTP	Dauphin, Lancaster, Lebanon	59 min
Jul 24, 4:20 PM EDT	Severe Thunderstorm Warning	CTP	Adams, Franklin, York	55 min
Jul 24, 4:27 PM EDT	Special Weather Statement	CTP	Cameron	33 min
Jul 24, 4:56 PM EDT	Areal Flood Advisory	CTP	Adams, Cumberland, Franklin	2 hr
Jul 24, 5:05 PM EDT	Special Weather Statement	CTP	Clinton	55 min
Jul 24, 5:15 PM EDT	Special Weather Statement	CTP	Lancaster	45 min
Jul 24, 5:21 PM EDT	Special Weather Statement	CTP	Sullivan	54 min
Jul 24, 5:53 PM EDT	Special Weather Statement	CTP	Lycoming	22 min
Jul 24, 5:55 PM EDT	Severe Thunderstorm Warning	CTP	Lycoming	50 min
Jul 24, 6:44 PM EDT	Severe Thunderstorm Warning	CTP	Columbia, Lycoming, Montour, Northumberland, Sullivan, Union	61 min
Jul 24, 7:45 PM EDT	Severe Thunderstorm Warning	CTP	Columbia, Montour, Northumberland, Schuylkill	47 min

Nearby

Severe Thunderstorm Warnings in Pennsylvania, 2009 Every severe thunderstorm warning in 2009

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.