Alert archive / Pennsylvania / Flash Flood Watches in 2015

Flash Flood Watch 3, NWS State College, PA

June 14, 201511 counties in Pennsylvania

NWS State College, PA issued this flash flood watch at Jun 14, 2015, 2:51 PM EDT for 11 counties in Pennsylvania. It was in force for 14 hr.

The area

The counties it named.

The facts

Issued: Jun 14, 2015, 2:51 PM EDT (18:51 UTC)
Expired: Jun 15, 2015, 5:05 AM EDT
In force: 14 hr
Issued by: NWS State College, PA
Flood severity: None

Counties Cambria County, PA, Cameron County, PA, Clearfield County, PA, Elk County, PA, Lycoming County, PA, McKean County, PA, Potter County, PA, Somerset County, PA, Sullivan County, PA, Tioga County, PA, Warren County, PA

The radar

The State College radar (KCCX), 43 km from the middle of the area, began a volume at 18:52 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

Buffalo Intl Airport, NY (KBUF), launched 12:00Z, 6.9 hours before the alert went out and 187 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: 889 m above ground
0-6 km bulk shear: 27 kt
0-1 km storm-relative helicity: 37 m²/s²
0-3 km storm-relative helicity: 74 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 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 Jun 14, 10:49 AM EDT, 4 hours 2 minutes earlier.

Area forecast discussion, Jun 14, 10:49 AM EDT, 4 hours 2 minutes before

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Hazardous weather outlook, Jun 14, 6:37 AM EDT, 8 hours 14 minutes before

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In the hours before

Special weather statement, Jun 14, 11:46 AM EDT, 3 hours 5 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE STATE COLLEGE PA
1146 AM EDT SUN JUN 14 2015

PAZ033-141630-
SOMERSET PA-
1146 AM EDT SUN JUN 14 2015

...A STRONG THUNDERSTORM WILL TRACK ACROSS CENTRAL AND SOUTHERN
SOMERSET COUNTY THROUGH 1230 PM...

AT 1145 AM EDT...DOPPLER RADAR INDICATED A STRONG THUNDERSTORM NEAR
NEW CENTERVILLE...MOVING EAST AT 25 MPH.

30 TO 40 MPH WIND GUSTS AND HEAVY DOWNPOURS CAN BE EXPECTED WITH
THIS STORM.

THIS STRONG THUNDERSTORM WILL BE NEAR...
  NEW CENTERVILLE AROUND 1150 AM EDT.
  SOMERSET AROUND 1200 PM EDT.
  MEYERSDALE AROUND 1215 PM EDT.
  BERLIN AROUND 1220 PM EDT.

OTHER LOCATIONS IMPACTED BY THIS STORM INCLUDE CASSELMAN...GARRETT...
ROCKWOOD...SEVEN SPRINGS AND SHANKSVILLE.

THIS INCLUDES THE PENNSYLVANIA TURNPIKE FROM MILE MARKERS 106 TO 122.

LAT...LON 3989 7940 3990 7940 4008 7927 4002 7885
      3976 7893
TIME...MOT...LOC 1545Z 281DEG 20KT 3995 7924

DEVOIR

Special weather statement, Jun 14, 1:56 PM EDT, 55 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE STATE COLLEGE PA
156 PM EDT SUN JUN 14 2015

PAZ034>036-141830-
BEDFORD PA-FRANKLIN PA-FULTON PA-
156 PM EDT SUN JUN 14 2015

...SPECIAL WEATHER STATEMENT...

AT 155 PM EDT...DOPPLER RADAR INDICATED A STRONG THUNDERSTORM NEAR
LOCUST GROVE...MOVING SOUTHEAST AT 25 MPH.

30 MPH WIND GUSTS WILL BE POSSIBLE WITH THIS STORM.

THIS STRONG THUNDERSTORM WILL BE NEAR...
  NEEDMORE AROUND 200 PM EDT.
  BIG COVE TANNERY AROUND 205 PM EDT.
  MCCONNELLSBURG AND MERCERSBURG AROUND 210 PM EDT.
  FORT LOUDON AROUND 215 PM EDT.
  ST. THOMAS AROUND 220 PM EDT.
  CHAMBERSBURG AROUND 230 PM EDT.

OTHER LOCATIONS IMPACTED BY THIS STORM INCLUDE STATE LINE...UPTON...
WILLIAMSON...WHITETAIL SKI AREA AND WARRENTON IN WASHINGTON COUNTY.

THIS INCLUDES THE FOLLOWING INTERSTATES...
 INTERSTATE 70 FROM MILE MARKERS 150 TO 170.
 INTERSTATE 81 FROM MILE MARKERS 0 TO 12.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

MINOR FLOODING MAY DEVELOP. DO NOT DRIVE INTO WATER COVERING THE
ROADWAY.

&&

LAT...LON 3972 7833 3997 7832 3993 7767 3972 7765
TIME...MOT...LOC 1755Z 240DEG 49KT 3982 7822

MARTIN

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 14, 11:46 AM EDT	Special Weather Statement	CTP	Somerset	44 min
Jun 14, 1:56 PM EDT	Special Weather Statement	CTP	Franklin, Fulton	34 min
Jun 14, 2:48 PM EDT	Areal Flood Advisory	CTP	McKean, Warren	3 hr
Jun 14, 4:31 PM EDT	Special Weather Statement	CTP	Centre, Huntingdon, Juniata, Mifflin, Perry, Snyder and 1 more	59 min
Jun 14, 5:16 PM EDT	Special Weather Statement	CTP	Montour, Northumberland, Snyder, Union	74 min
Jun 14, 5:24 PM EDT	Tornado Warning	CTP	Lycoming	36 min
Jun 14, 5:40 PM EDT	Severe Thunderstorm Warning	CTP	Dauphin, Lancaster, Lebanon	50 min
Jun 14, 6:11 PM EDT	Severe Thunderstorm Warning	CTP	Columbia, Montour, Northumberland, Schuylkill	49 min
Jun 14, 6:13 PM EDT	Special Weather Statement	CTP	Lancaster	47 min
Jun 14, 6:21 PM EDT	Severe Thunderstorm Warning	CTP	Dauphin, Lebanon, Schuylkill	54 min
Jun 14, 6:50 PM EDT	Areal Flood Advisory	CTP	Lancaster	3 hr
Jun 14, 7:35 PM EDT	Special Weather Statement	CTP	Warren	55 min
Jun 14, 7:49 PM EDT	Special Weather Statement	CTP	Lancaster	26 min

Nearby

Flash Flood Watches in Pennsylvania, 2015 Every flash flood watch in 2015

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.