Alert archive / Pennsylvania / Flash Flood Warnings in 2015

Flash Flood Warning 13, NWS State College, PA

July 18, 2015Clearfield County, Pennsylvania

NWS State College, PA issued this flash flood warning at Jul 18, 2015, 2:36 AM EDT for Clearfield County, Pennsylvania. It was in force for 3 hr. 1 report came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued: Jul 18, 2015, 2:36 AM EDT (06:36 UTC)
Expired: Jul 18, 2015, 5:30 AM EDT
In force: 3 hr
Issued by: NWS State College, PA
Area: Storm-based polygon
Flood severity: None

County Clearfield County, PA

The radar

The State College radar (KCCX), 36 km from the middle of the area, began a volume at 06:38 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.

What was reported inside it

Time	Report	Where	Remark
Jul 18, 4:30 AM EDT	FLASH FLOOD	Shawville, PA	MUDSLIDE NEAR THE INTERSECTION OF STINER ROAD AND SHAWVILLE CROFT HIGHWAY /ROUTE 879/. BOTH ROADS ALSO CLOSED WITH FLOODING.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Pittsburgh, PA (KAGC), launched 00:00Z, 6.6 hours before the alert went out and 168 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: 1138 J/kg
Mixed-layer CIN: -19 J/kg
Mixed-layer LCL: 1050 m above ground
0-6 km bulk shear: 17 kt
0-1 km storm-relative helicity: 151 m²/s²
0-3 km storm-relative helicity: 249 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 4.3

Open this sounding in Storm Lab

The text

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

597 
WGUS51 KCTP 180636
FFWCTP
PAC033-180930-
/O.NEW.KCTP.FF.W.0013.150718T0636Z-150718T0930Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE STATE COLLEGE PA
236 AM EDT SAT JUL 18 2015

THE NATIONAL WEATHER SERVICE IN STATE COLLEGE PA HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  NORTHERN CLEARFIELD COUNTY IN CENTRAL PENNSYLVANIA...

* UNTIL 530 AM EDT
    
* AT 234 AM EDT...DOPPLER RADAR INDICATED A THUNDERSTORM PRODUCING 
  HEAVY RAIN ACROSS NORTHERN CLEARFIELD COUNTY. RADAR ESTIMATES SHOW 
  THAT UP TO THREE INCHES OF RAIN HAVE ALREADY FALLEN DURING THE 
  PAST 60 TO 90 MINUTES. ADDITIONAL THUNDERSTORMS WILL CONTINUE 
  ACROSS THE REGION THROUGH 330 AM. FLASH FLOODING IS EXPECTED TO 
  BEGIN SHORTLY.

* SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
  CLEARFIELD...DUBOIS...KARTHAUS...LECONTES MILLS...PARKER DAM STATE
  PARK...PENFIELD...PLYMPTONVILLE...ROCKTON...S.B. ELLIOT STATE
  PARK...SANDY...GRASSFLAT...KYLERTOWN...CLEARFIELD-LAWRENCE
  AIRPORT...PENN STATE DUBOIS AND TREASURE LAKE.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE
DANGERS OF FLOODING.

&&

LAT...LON 4120 7877 4122 7865 4125 7865 4122 7810
      4116 7804 4113 7806 4112 7811 4106 7809
      4104 7806 4103 7808 4099 7807 4098 7813
      4109 7880 4113 7880

$$

JUNG

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 17, 10:20 PM EDT	Special Weather Statement	CTP	Elk	25 min
Jul 17, 10:54 PM EDT	Special Weather Statement	CTP	Elk	51 min
Jul 17, 11:39 PM EDT	Areal Flood Advisory	CTP	Elk	3 hr
Jul 18, 1:44 AM EDT	Areal Flood Advisory	CTP	Clearfield, Elk	3 hr
Jul 18, 3:54 AM EDT	Special Weather Statement	CTP	Mifflin, Snyder	36 min
Jul 18, 4:30 AM EDT	Special Weather Statement	CTP	Juniata, Perry, Snyder	45 min
Jul 18, 4:51 AM EDT	Areal Flood Advisory	CTP	Blair, Huntingdon	3 hr
Jul 18, 7:35 AM EDT	Areal Flood Advisory	CTP	Adams, Cumberland, Franklin, Fulton, Huntingdon	115 min
Jul 18, 7:49 AM EDT	Areal Flood Advisory	CTP	Centre	3 hr
Jul 18, 8:38 AM EDT	Special Weather Statement	CTP	Adams	52 min
Jul 18, 9:26 AM EDT	Special Weather Statement	CTP	Lycoming	64 min
Jul 18, 10:44 AM EDT	Special Weather Statement	CTP	Lycoming	61 min
Jul 18, 2:18 PM EDT	Heat Advisory	CTP	Adams, Cumberland, Dauphin, Franklin, Lancaster, Lebanon and 3 more	31 hr
Jul 18, 4:43 PM EDT	Special Weather Statement	CTP	Tioga	47 min
Jul 18, 5:16 PM EDT	Special Weather Statement	CTP	McKean	29 min
Jul 18, 6:19 PM EDT	Special Weather Statement	CTP	Sullivan	26 min
Jul 18, 6:29 PM EDT	Special Weather Statement	CTP	Dauphin	31 min
Jul 18, 7:04 PM EDT	Special Weather Statement	CTP	Northumberland	26 min
Jul 18, 7:06 PM EDT	Special Weather Statement	CTP	Montour	24 min
Jul 18, 7:21 PM EDT	Severe Thunderstorm Warning	CTP	Northumberland, Snyder	39 min
Jul 18, 7:26 PM EDT	Special Weather Statement	CTP	Lebanon	34 min
Jul 18, 7:39 PM EDT	Special Weather Statement	CTP	York	36 min
Jul 18, 7:56 PM EDT	Areal Flood Advisory	CTP	Northumberland	3 hr

Nearby

Flash Flood Warnings in Pennsylvania, 2015 Every flash flood warning 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.