Alert archive / Pennsylvania / Flood Watches in 2011

Flood Watch 5, NWS State College, PA

April 4, 201110 counties in Pennsylvania

NWS State College, PA issued this flood watch at Apr 4, 2011, 10:00 PM EDT for 10 counties in Pennsylvania. It was in force for 10 hr.

The area

The counties it named.

The facts

Issued: Apr 4, 2011, 10:00 PM EDT (02:00 UTC)
Expired: Apr 5, 2011, 8:02 AM EDT
In force: 10 hr
Issued by: NWS State College, PA
Flood severity: None

Counties Cambria County, PA, Cameron County, PA, Centre County, PA, Clearfield County, PA, Clinton County, PA, Elk County, PA, Lycoming County, PA, McKean County, PA, Potter County, PA, Tioga County, PA

The radar

The State College radar (KCCX), 44 km from the middle of the area, began a volume at 02:03 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.

The nearest sounding before it

Pittsburgh, PA (KPIT), launched 00:00Z, 2.0 hours before the alert went out and 201 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 777 m above ground
0-6 km bulk shear: 69 kt
0-1 km storm-relative helicity: 18 m²/s²
0-3 km storm-relative helicity: 36 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this flood watch 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 flood watch went out at Apr 4, 8:25 PM EDT, 1 hour 35 minutes earlier.

Area forecast discussion, Apr 4, 8:25 PM EDT, 1 hour 35 minutes before

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Hazardous weather outlook, Apr 4, 9:25 AM EDT, 12 hours 35 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE STATE COLLEGE PA
925 AM EDT MON APR 4 2011

PAZ004>006-010>012-017>019-024>028-033>036-045-056-063-064-051330-
WARREN-MCKEAN-POTTER-ELK-CAMERON-NORTHERN CLINTON-CLEARFIELD-
NORTHERN CENTRE-SOUTHERN CENTRE-CAMBRIA-BLAIR-HUNTINGDON-MIFFLIN-
JUNIATA-SOMERSET-BEDFORD-FULTON-FRANKLIN-SOUTHERN CLINTON-PERRY-
CUMBERLAND-ADAMS-
925 AM EDT MON APR 4 2011

THIS HAZARDOUS WEATHER OUTLOOK IS FOR CENTRAL PENNSYLVANIA.

.DAY ONE...TODAY AND TONIGHT.

THERE IS A SLIGHT RISK FOR SEVERE THUNDERSTORMS TODAY AND TONIGHT.
THE PRIMARY THREAT FOR SEVERE WEATHER WILL BE DAMAGING WINDS.

.DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY.

THE PROBABILITY FOR WIDESPREAD HAZARDOUS WEATHER IS LOW.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION IS NOT EXPECTED AT THIS TIME.

PAZ037-041-042-046-049>053-057>059-065-066-051330-
TIOGA-NORTHERN LYCOMING-SULLIVAN-SOUTHERN LYCOMING-UNION-SNYDER-
MONTOUR-NORTHUMBERLAND-COLUMBIA-DAUPHIN-SCHUYLKILL-LEBANON-YORK-
LANCASTER-
925 AM EDT MON APR 4 2011

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...TUESDAY THROUGH SUNDAY.

THE PROBABILITY FOR WIDESPREAD HAZARDOUS WEATHER IS LOW.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION IS NOT EXPECTED AT THIS TIME.

In the hours before

Special weather statement, Apr 4, 4:43 PM EDT, 5 hours 17 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE STATE COLLEGE PA
443 PM EDT MON APR 4 2011

PAZ046-049-051>053-042115-
COLUMBIA PA-MONTOUR PA-NORTHUMBERLAND PA-SOUTHERN LYCOMING PA-
UNION PA-
443 PM EDT MON APR 4 2011

...A LINE OF STRONG THUNDERSTORMS WILL AFFECT COLUMBIA...MONTOUR...
NORTHEASTERN UNION...NORTHWESTERN NORTHUMBERLAND AND SOUTHEASTERN
LYCOMING COUNTIES...

AT 441 PM EDT...A LINE OF STRONG THUNDERSTORMS WAS LOCATED FROM
MONTGOMERY TO MILTON...MOVING EAST AT 45 MPH.

WIND GUSTS TO 40 MPH AND SMALL HAIL ARE POSSIBLE WITH THESE STORMS.
THESE STORMS WILL BE NEAR MUNCY AROUND 450 PM...BIGGERTOWN AROUND 500
PM AND RED ROCK AROUND 510 PM.

THIS WILL IMPACT THE FOLLOWING CENTRAL PENNSYLVANIA INTERSTATES...
I-80 BETWEEN MILE MARKERS 203 AND 247...I-180 BETWEEN MILE MARKERS 1
AND 14.

THIS WILL ALSO IMPACT THE FOLLOWING MAJOR ROADS...STATE HIGHWAY
147...ROUTE 11...ROUTE 15...STATE ROAD 45...STATE ROAD 118.

LAT...LON 4095 7621 4095 7699 4119 7702 4129 7652
      4128 7645 4131 7641 4131 7631 4121 7632
      4115 7628 4114 7626

FORECASTER: GARTNER/KOZAR

Special weather statement, Apr 4, 6:19 PM EDT, 3 hours 41 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE STATE COLLEGE PA
619 PM EDT MON APR 4 2011

PAZ033-042300-
SOMERSET PA-
619 PM EDT MON APR 4 2011

...A LINE OF STRONG THUNDERSTORMS APPROACHING SOMERSET COUNTY...

AT 612 PM EDT...A LINE OF STRONG THUNDERSTORMS WAS LOCATED FROM
BLAIRSVILLE TO 12 MILES SOUTHWEST OF BRUCETON MILLS...MOVING EAST AT
50 MPH.

WIND GUSTS UP TO 50 MPH AND SMALL HAIL ARE POSSIBLE IN A FEW SPOTS
WITH THESE STORMS. THESE STORMS WILL BE NEAR SEVEN SPRINGS AROUND
630 PM...TIRE HILL AROUND 640 PM...WINDBER AROUND 650 PM AND
OGLETOWN AROUND 700 PM.

LAT...LON 3971 7939 3973 7941 3979 7937 3982 7937
      3985 7942 3990 7941 4009 7926 4013 7917
      4028 7906 4029 7893 4024 7888 4024 7866
      4008 7873 4006 7876 4000 7876 3972 7891

FORECASTER: KF

Special weather statement, Apr 4, 6:35 PM EDT, 3 hours 25 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE STATE COLLEGE PA
635 PM EDT MON APR 4 2011

PAZ024-025-033-042315-
BLAIR PA-CAMBRIA PA-SOMERSET PA-
635 PM EDT MON APR 4 2011

...A STRONG THUNDERSTORM WILL AFFECT CAMBRIA...NORTHEASTERN SOMERSET
AND WESTERN BLAIR COUNTIES THROUGH 715 PM EDT...

AT 631 PM EDT...A STRONG THUNDERSTORM WAS 6 MILES SOUTH OF NEW
FLORENCE...MOVING RAPIDLY TO THE NORTHEAST AT 70 MPH.

WIND GUSTS TO 45 MPH AND PEA TO DIME SIZE HAIL ARE POSSIBLE WITH
THIS STORM. THIS STORM WILL BE NEAR VINCO AROUND 640 PM...LORETTO
AROUND 650 PM AND ASHVILLE AROUND 700 PM.

THIS WILL IMPACT I-99 BETWEEN MILE MARKERS 21 AND 30.

THIS WILL ALSO IMPACT THE FOLLOWING MAJOR ROADS...THE JOHNSTOWN
EXPRESSWAY...ROUTE 22...ROUTE 30...ROUTE 219...ROUTE 220...ROUTE
422...STATE ROAD 56.

LAT...LON 4021 7913 4036 7900 4053 7890 4073 7842
      4034 7842 4030 7856 4033 7862 4027 7865
      4008 7916

FORECASTER: LAMBERT

Special weather statement, Apr 4, 7:29 PM EDT, 2 hours 31 minutes before

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Special weather statement, Apr 4, 7:47 PM EDT, 2 hours 13 minutes before

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Special weather statement, Apr 4, 8:14 PM EDT, 1 hour 46 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 4, 8:14 PM EDT	Special Weather Statement	CTP	Columbia, Montour, Northumberland, Snyder, Union	31 min
Apr 4, 10:22 PM EDT	Special Weather Statement	CTP	Adams, Cumberland, Dauphin, Lebanon, York	38 min
Apr 5, 4:05 AM EDT	Areal Flood Advisory	CTP	Cameron, Centre, Clearfield, Clinton, Elk, Lycoming and 2 more	3 hr
Apr 5, 4:53 AM EDT	Special Weather Statement	CTP	Lancaster	22 min
Apr 5, 5:27 AM EDT	Areal Flood Advisory	CTP	Adams, Cumberland, Dauphin, Franklin, Lancaster, Lebanon and 4 more	3 hr
Apr 5, 5:29 AM EDT	Special Weather Statement	CTP	Lancaster	31 min
Apr 5, 7:21 AM EDT	Areal Flood Advisory	CTP	Cameron, Centre, Clearfield, Clinton, Elk, Lycoming and 3 more	4 hr

Nearby

Flood Watches in Pennsylvania, 2011 Every flood watch 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.