Alert archive / Pennsylvania / Flash Flood Watches in 2006

Flash Flood Watch 7, NWS State College, PA

July 28, 20065 counties in Pennsylvania

NWS State College, PA issued this flash flood watch at Jul 28, 2006, 4:12 AM EDT for 5 counties in Pennsylvania. It was in force for 7 hr.

The area

The counties it named.

The facts

Issued: Jul 28, 2006, 4:12 AM EDT (08:12 UTC)
Expired: Jul 28, 2006, 11:37 AM EDT
In force: 7 hr
Issued by: NWS State College, PA
Flood severity: None

Counties Cameron County, PA, Elk County, PA, McKean County, PA, Potter County, PA, Warren County, PA

The radar

The State College radar (KCCX), 91 km from the middle of the area, began a volume at 08:15 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, 8.2 hours before the alert went out and 191 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: 1393 J/kg
Mixed-layer CIN: -1 J/kg
Mixed-layer LCL: 841 m above ground
0-6 km bulk shear: 19 kt
0-1 km storm-relative helicity: 65 m²/s²
0-3 km storm-relative helicity: 94 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.4

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this flash 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 flash flood watch went out at Jul 28, 3:56 AM EDT, 16 minutes earlier.

Area forecast discussion, Jul 28, 3:56 AM EDT, 16 minutes before

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Hazardous weather outlook, Jul 27, 5:03 AM EDT, 23 hours 9 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE STATE COLLEGE PA
503 AM EDT THU JUL 27 2006

PAZ004>006-010>012-017>019-024>028-033>037-041-042-045-046-
049>053-056>059-063>066-280915-
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-
503 AM EDT THU JUL 27 2006

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF CENTRAL
PENNSYLVANIA.

.DAY ONE...TODAY AND TONIGHT

TROPICAL MOISTURE WILL BE IN PLACE ACROSS PENNSYLVANIA LATE TODAY
AND FRIDAY. THUNDERSTORMS THAT FORM IN THIS AIRMASS HAVE THE
POTENTIAL TO PRODUCE LOCALLY HEAVY RAINFALL AS WELL AS ISOLATED
DAMAGING WIND GUSTS.

.DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY

ISOLATED SEVERE THUNDERSTORMS...CONTAINING TORRENTIAL DOWNPOURS
AND DAMAGING WIND GUSTS...ARE POSSIBLE FRIDAY
AFTERNOON...ESPECIALLY OVER NORTHEAST PENNSYLVANIA.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION WILL NOT BE NEEDED.

In the hours before

Special weather statement, Jul 27, 10:15 PM EDT, 5 hours 57 minutes before

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Special weather statement, Jul 27, 10:48 PM EDT, 5 hours 24 minutes before

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Local storm report, Jul 27, 10:52 PM EDT, 5 hours 20 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
Jul 27, 9:57 PM EDT	Severe Thunderstorm Warning	CTP	Adams	48 min
Jul 28, 11:37 AM EDT	Flash Flood Watch	CTP	Adams, Bedford, Blair, Cambria, Cumberland, Dauphin and 11 more	4 hr
Jul 28, 12:46 PM EDT	Severe Thunderstorm Warning	CTP	Columbia, Northumberland	59 min
Jul 28, 1:00 PM EDT	Severe Thunderstorm Warning	CTP	Dauphin, Lebanon	60 min
Jul 28, 1:11 PM EDT	Severe Thunderstorm Warning	CTP	Schuylkill	79 min

Nearby

Flash Flood Watches in Pennsylvania, 2006 Every flash flood watch in 2006

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.