Alert archive / Pennsylvania / Flash Flood Warnings in 2018

Flash Flood Warning 9, NWS State College, PA

June 28, 2018Lebanon County, Schuylkill County, Pennsylvania

NWS State College, PA issued this flash flood warning at Jun 28, 2018, 2:36 AM EDT for Lebanon County, Schuylkill County, Pennsylvania. It was in force for 3 hr. 3 reports 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: Jun 28, 2018, 2:36 AM EDT (06:36 UTC)
Expired: Jun 28, 2018, 5:30 AM EDT
In force: 3 hr
Issued by: NWS State College, PA
Area: Storm-based polygon
Flood severity: None

Counties Lebanon County, PA, Schuylkill County, PA

The radar

The State College radar (KCCX), 150 km from the middle of the area, began a volume at 06:37 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
Jun 28, 3:00 AM EDT	FLASH FLOOD	1 Nnw Brookside, PA	WATER RESCUE SUEDBERG ROAD AND GEARY WOLFE ROAD AT SWATARA CREEK
Jun 28, 3:15 AM EDT	FLASH FLOOD	Pine Grove, PA	NUMEROUS ROADS WASHED OUT AND IMPASSABLE AROUND PINE GROVE.
Jun 28, 3:30 AM EDT	HEAVY RAIN 4.3	1 Wsw Lake Wynonah, PA	3.93 INCHES SINCE MIDNIGHT

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

The nearest sounding before it

Washington/Dulle, VA (KIAD), launched 00:00Z, 6.6 hours before the alert went out and 199 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: 808 J/kg
Mixed-layer CIN: -4 J/kg
Mixed-layer LCL: 876 m above ground
0-6 km bulk shear: 35 kt
0-1 km storm-relative helicity: 99 m²/s²
0-3 km storm-relative helicity: 146 m²/s²
Significant tornado parameter: 0.4
Supercell composite: 3.7

Open this sounding in Storm Lab

The text

As transmitted.

554 
WGUS51 KCTP 280636
FFWCTP
PAC075-107-280930-
/O.NEW.KCTP.FF.W.0009.180628T0636Z-180628T0930Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service State College PA
236 AM EDT THU JUN 28 2018

The National Weather Service in State College PA has issued a

* Flash Flood Warning for...
  South central Schuylkill County in central Pennsylvania...
  Northwestern Lebanon County in south central Pennsylvania...

* Until 530 AM EDT..

* At 236 AM EDT, Doppler radar indicated thunderstorms producing
  heavy rain across the warned area. Up to three inches of rain have
  already fallen. Flash flooding is expected to begin shortly.

* Some locations that will experience flooding include...
  Schuylkill Haven, Pine Grove, Fredericksburg, Friedensburg, Harper
  Tavern, Lickdale, Fort Indiantown Gap, Lake Wynonah, Jonestown,
  Cressona, Auburn, Deer Lake, Ravine, Summit Station, Landingville
  and Ono.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.

Be especially cautious at night when it is harder to recognize the
dangers of flooding.

&&

LAT...LON 4060 7601 4053 7617 4052 7626 4052 7634
      4049 7644 4045 7637 4038 7664 4047 7668
      4063 7636 4062 7600

$$

KF

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 27, 8:16 PM EDT	Special Weather Statement	CTP	Clearfield	74 min
Jun 27, 8:49 PM EDT	Special Weather Statement	CTP	Fulton	56 min
Jun 27, 9:33 PM EDT	Special Weather Statement	CTP	Blair	42 min
Jun 27, 9:38 PM EDT	Special Weather Statement	CTP	Clinton	52 min
Jun 27, 9:42 PM EDT	Special Weather Statement	CTP	Centre	63 min
Jun 27, 9:57 PM EDT	Special Weather Statement	CTP	Blair	48 min
Jun 27, 10:14 PM EDT	Special Weather Statement	CTP	Cumberland, Perry	31 min
Jun 27, 11:00 PM EDT	Special Weather Statement	CTP	Cumberland	60 min
Jun 27, 11:01 PM EDT	Special Weather Statement	CTP	Northumberland, Snyder	29 min
Jun 27, 11:03 PM EDT	Special Weather Statement	CTP	Dauphin	42 min
Jun 27, 11:32 PM EDT	Special Weather Statement	CTP	Columbia, Montour, Northumberland	43 min
Jun 27, 11:57 PM EDT	Special Weather Statement	CTP	Dauphin	18 min
Jun 28, 12:28 AM EDT	Special Weather Statement	CTP	Dauphin, Lebanon	47 min
Jun 28, 12:54 AM EDT	Severe Thunderstorm Warning	CTP	Dauphin, Lebanon	50 min
Jun 28, 1:14 AM EDT	Areal Flood Advisory	CTP	Dauphin, Lebanon, Schuylkill	3 hr
Jun 28, 1:17 AM EDT	Special Weather Statement	CTP	Schuylkill	28 min
Jun 28, 5:30 AM EDT	Areal Flood Advisory	CTP	Lebanon, Schuylkill	3 hr
Jun 28, 7:52 AM EDT	River Flood Warning	CTP	Lebanon, Schuylkill	24 hr
Jun 28, 10:20 AM EDT	River Flood Warning	CTP	Dauphin, Lebanon	26 hr

Nearby

Flash Flood Warnings in Pennsylvania, 2018 Every flash flood warning in 2018

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.