Alert archive / Pennsylvania / Flash Flood Watches in 2014

Flash Flood Watch 1, NWS State College, PA

May 13, 2014Blair County, Cambria County, Somerset County, Pennsylvania

NWS State College, PA issued this flash flood watch at May 13, 2014, 9:45 PM EDT for Blair County, Cambria County, Somerset County, Pennsylvania. It took effect at May 13, 2014, 11:00 PM EDT. It was in force for 5 hr.

The area

The counties it named.

The facts

Issued: May 13, 2014, 9:45 PM EDT (01:45 UTC)
In effect from: May 13, 2014, 11:00 PM EDT
Expired: May 14, 2014, 3:39 AM EDT
In force: 5 hr
Issued by: NWS State College, PA
Flood severity: None

Counties Blair County, PA, Cambria County, PA, Somerset County, PA

The radar

The State College radar (KCCX), 89 km from the middle of the area, began a volume at 01:47 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 (KAGC), launched 00:00Z, 1.8 hours before the alert went out and 119 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: 368 J/kg
Mixed-layer CIN: -18 J/kg
Mixed-layer LCL: 1939 m above ground
0-6 km bulk shear: 20 kt
0-1 km storm-relative helicity: 38 m²/s²
0-3 km storm-relative helicity: 67 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.7

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 May 13, 9:28 PM EDT, 17 minutes earlier.

Area forecast discussion, May 13, 9:28 PM EDT, 17 minutes before

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Hazardous weather outlook, May 13, 6:08 PM EDT, 3 hours 37 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE STATE COLLEGE PA
608 PM EDT TUE MAY 13 2014

PAZ004>006-010>012-017>019-024-025-027-028-033-037-041-042-045-046-
049>053-056>059-063-065-066-142215-
WARREN-MCKEAN-POTTER-ELK-CAMERON-NORTHERN CLINTON-CLEARFIELD-
NORTHERN CENTRE-SOUTHERN CENTRE-CAMBRIA-BLAIR-MIFFLIN-JUNIATA-
SOMERSET-TIOGA-NORTHERN LYCOMING-SULLIVAN-SOUTHERN CLINTON-
SOUTHERN LYCOMING-UNION-SNYDER-MONTOUR-NORTHUMBERLAND-COLUMBIA-PERRY-
DAUPHIN-SCHUYLKILL-LEBANON-CUMBERLAND-YORK-LANCASTER-
608 PM EDT TUE MAY 13 2014

THIS HAZARDOUS WEATHER OUTLOOK IS FOR CENTRAL PENNSYLVANIA.

.DAY ONE...TONIGHT.

THE PROBABILITY FOR WIDESPREAD HAZARDOUS WEATHER IS LOW.

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

THERE IS AN ELEVATED RISK FOR HEAVY RAINFALL AND POTENTIAL
FLOODING OF POOR DRAINAGE AREAS...SMALL STREAMS AND CREEKS FROM
THURSDAY AFTERNOON INTO FRIDAY. RAINFALL AMOUNTS OF 1.5 TO 2.5
INCHES ARE POSSIBLE.

.SPOTTER INFORMATION STATEMENT...

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

PAZ026-034>036-064-142215-
HUNTINGDON-BEDFORD-FULTON-FRANKLIN-ADAMS-
608 PM EDT TUE MAY 13 2014

THIS HAZARDOUS WEATHER OUTLOOK IS FOR CENTRAL PENNSYLVANIA.

.DAY ONE...TONIGHT.

A CLUSTER OF STRONG TOO SEVERE THUNDERSTORMS WILL AFFECT THE
REGION THROUGH EARLY THIS EVENING...BRINGING THE CHANCE FOR
DAMAGING STRAIGHT LINE WIND GUSTS AND LOCALIZED 1 INCH DIAMETER
HAIL.

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

THERE IS AN ELEVATED RISK FOR HEAVY RAINFALL AND POTENTIAL
FLOODING OF POOR DRAINAGE AREAS...SMALL STREAMS AND CREEKS FROM
THURSDAY AFTERNOON INTO FRIDAY. RAINFALL AMOUNTS OF 1.5 TO 2.5
INCHES ARE POSSIBLE.|

.SPOTTER INFORMATION STATEMENT...

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

LAMBERT

In the hours before

Special weather statement, May 13, 8:03 PM EDT, 1 hour 42 minutes before

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Local storm report, May 13, 8:10 PM EDT, 1 hour 35 minutes before

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Special weather statement, May 13, 8:12 PM EDT, 1 hour 33 minutes before

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Local storm report, May 13, 8:26 PM EDT, 1 hour 19 minutes before

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Special weather statement, May 13, 8:35 PM EDT, 1 hour 10 minutes before

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Special weather statement, May 13, 9:16 PM EDT, 29 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
May 13, 8:03 PM EDT	Special Weather Statement	CTP	Centre	57 min
May 13, 8:12 PM EDT	Special Weather Statement	CTP	Clearfield	33 min
May 13, 8:35 PM EDT	Special Weather Statement	CTP	Cameron	40 min
May 13, 9:16 PM EDT	Special Weather Statement	CTP	Somerset	74 min
May 14, 12:45 AM EDT	Special Weather Statement	CTP	Cameron	45 min
May 14, 12:55 AM EDT	Areal Flood Advisory	CTP	McKean, Warren	3 hr
May 14, 11:43 AM EDT	Flash Flood Watch	CTP	McKean, Warren	10 hr
May 14, 3:31 PM EDT	Special Weather Statement	CTP	Cameron, Potter	74 min
May 14, 4:21 PM EDT	Special Weather Statement	CTP	Warren	24 min
May 14, 4:27 PM EDT	Special Weather Statement	CTP	Potter	63 min

Nearby

Flash Flood Watches in Pennsylvania, 2014 Every flash flood watch in 2014

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.