Alert archive / Pennsylvania / Flash Flood Warnings in 2016

Flash Flood Warning 9, NWS State College, PA

October 21, 20165 counties in Pennsylvania

NWS State College, PA issued this flash flood warning at Oct 21, 2016, 3:30 AM EDT for 5 counties in Pennsylvania. It was in force for 4 hr. 2 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: Oct 21, 2016, 3:30 AM EDT (07:30 UTC)
Expired: Oct 21, 2016, 7:30 AM EDT
In force: 4 hr
Issued by: NWS State College, PA
Area: Storm-based polygon
Flood severity: None

Counties Centre County, PA, Clinton County, PA, Lycoming County, PA, Sullivan County, PA, Tioga County, PA

The radar

The State College radar (KCCX), 78 km from the middle of the area, began a volume at 07:31 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
Oct 21, 6:00 AM EDT	FLOOD	Trout Run, PA	NUMEROUS ROAD CLOSURES DUE TO HIGH WATER WERE REPORTED ACROSS ELDRED... CASCADE... LEWIS... GAMBLE... HEPBURN AND LOYALSOCK TOWNSHIPS IN LYCOMING COUNTY.
Oct 21, 7:25 AM EDT	HEAVY RAIN 6	Jersey Shore, PA	.

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

The nearest sounding before it

Buffalo Intl Airport, NY (KBUF), launched 00:00Z, 7.5 hours before the alert went out and 222 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: 560 m above ground
0-6 km bulk shear: 64 kt
0-1 km storm-relative helicity: 95 m²/s²
0-3 km storm-relative helicity: 220 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

129 
WGUS51 KCTP 210730
FFWCTP
PAC027-035-081-113-117-211130-
/O.NEW.KCTP.FF.W.0009.161021T0730Z-161021T1130Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE STATE COLLEGE PA
330 AM EDT FRI OCT 21 2016

THE NATIONAL WEATHER SERVICE IN STATE COLLEGE PA HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  NORTHWESTERN SULLIVAN COUNTY IN NORTH CENTRAL PENNSYLVANIA...
  CENTRAL CENTRE COUNTY IN CENTRAL PENNSYLVANIA...
  SOUTHEASTERN TIOGA COUNTY IN NORTH CENTRAL PENNSYLVANIA...
  CENTRAL LYCOMING COUNTY IN NORTH CENTRAL PENNSYLVANIA...
  SOUTHEASTERN CLINTON COUNTY IN NORTH CENTRAL PENNSYLVANIA...

* UNTIL 730 AM EDT.

* AT 325 AM EDT...HEAVY RAIN HAS FALLEN ACROSS THE AREA AND
  FLASH FLOODING IS EXPECTED THROUGH THE OVERNIGHT HOURS.

  THE CENTRE COUNTY EMERGENCY MANAGEMENT AGENCY HAS DECLARED 
  AN EMERGENCY FOR THE AREAS...BOG'S TOWNSHIPS...UNION 
  TOWNSHIP AND MILESBURG BOROUGH DUE TO MAJOR FLOODING 
  ASSOCIATED WITH THE RAIN EVENT. 

  RESIDENTS ARE URGED TO USE CAUTION WHILE DRIVING AND TO 
  AVOID THE FLOODED AREAS WHEN POSSIBLE.  RESIDENTS WHO
  NEED EVACUATED SHOULD CALL 911 FOR ASSISTANCE.

* SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
  JERSEY SHORE...BELLEFONTE...MONTOURSVILLE...LOCK HAVEN...
  WILLIAMSPORT...STATE COLLEGE...MACKEYVILLE...FLEMINGTON...
  DUNNSTOWN...PLEASANT GAP...BALD EAGLE STATE PARK...SHUNK...TROUT
  RUN...KETTLE CREEK GORGE...PARK FOREST VILLAGE...RALSTON...
  STORMSTOWN...HOUSERVILLE...COGAN STATION AND MCELHATTAN.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4159 7687 4156 7643 4155 7642 4111 7713
      4082 7775 4076 7800 4079 7814 4132 7752
      4162 7688

$$

CR/GD/JC

1 follow-up statement

278 
WGUS71 KCTP 210938
FFSCTP

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE STATE COLLEGE PA
538 AM EDT FRI OCT 21 2016

PAC027-035-081-113-117-211130-
/O.CON.KCTP.FF.W.0009.000000T0000Z-161021T1130Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
SULLIVAN PA-CENTRE PA-TIOGA PA-LYCOMING PA-CLINTON PA-
538 AM EDT FRI OCT 21 2016

...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 730 AM EDT FOR
NORTHWESTERN SULLIVAN...CENTRAL CENTRE...SOUTHEASTERN TIOGA...CENTRAL
LYCOMING AND SOUTHEASTERN CLINTON COUNTIES...

AT 530 AM EDT...DOPPLER RADAR INDICATED HEAVY RAIN CONTINUES ACROSS 
PORTIONS OF THE THE WARNED AREA WITH FLASH FLOODING IN PROGRESS.

THE CENTRE COUNTY EMERGENCY MANAGEMENT AGENCY HAS DECLARED AN
EMERGENCY FOR THE FOLLOWING AREAS...BOGGS TOWNSHIP...UNION TOWNSHIP
AND MILESBURG BOROUGH DUE TO MAJOR FLOODING ASSOCIATED WITH THIS
RAIN EVENT.

RESIDENTS ARE URGED TO USE CAUTION WHILE DRIVING AND TO AVOID THE 
FLOODED AREAS WHEN POSSIBLE.  RESIDENTS WHO NEED EVACUATED SHOULD
CALL 911 FOR ASSISTANCE.

SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
JERSEY SHORE...BELLEFONTE...MONTOURSVILLE...LOCK HAVEN...
WILLIAMSPORT...STATE COLLEGE...MACKEYVILLE...FLEMINGTON...
DUNNSTOWN...PLEASANT GAP...BALD EAGLE STATE PARK...SHUNK...TROUT
RUN...KETTLE CREEK GORGE...PARK FOREST VILLAGE...RALSTON...
STORMSTOWN...HOUSERVILLE...COGAN STATION AND MCELHATTAN.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TURN AROUND...DON'T DROWN WHEN ENCOUNTERING FLOODED ROADS. MOST FLOOD
DEATHS OCCUR IN VEHICLES.

&&

LAT...LON 4159 7687 4156 7643 4155 7642 4111 7713
      4082 7775 4076 7800 4079 7814 4132 7752
      4162 7688

$$

CR

The office that day

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

Issued	Product	Office	Counties	Lasted
Oct 20, 8:03 PM EDT	Special Weather Statement	CTP	Blair	27 min
Oct 20, 8:28 PM EDT	Areal Flood Warning	CTP	Clearfield	3 hr
Oct 20, 8:30 PM EDT	Special Weather Statement	CTP	Clearfield, Clinton	45 min
Oct 20, 8:49 PM EDT	Areal Flood Warning	CTP	Centre, Clinton	6 hr
Oct 20, 9:30 PM EDT	Special Weather Statement	CTP	Centre, Mifflin	60 min
Oct 20, 9:39 PM EDT	Special Weather Statement	CTP	Clinton, Lycoming	66 min
Oct 20, 9:55 PM EDT	Areal Flood Advisory	CTP	Centre, Clinton, Huntingdon	3 hr
Oct 20, 10:10 PM EDT	Severe Thunderstorm Warning	CTP	Centre, Clinton, Lycoming	65 min
Oct 20, 10:42 PM EDT	Severe Thunderstorm Warning	CTP	Lycoming, Sullivan, Tioga	52 min
Oct 20, 10:47 PM EDT	Areal Flood Warning	CTP	Blair, Centre, Clinton, Huntingdon, Lycoming	6 hr
Oct 21, 12:14 AM EDT	Areal Flood Warning	CTP	Clinton, Lycoming, Sullivan, Tioga	3 hr
Oct 21, 12:19 AM EDT	Special Weather Statement	CTP	Lycoming	26 min
Oct 21, 1:01 AM EDT	Special Weather Statement	CTP	Sullivan	29 min
Oct 21, 1:39 AM EDT	Areal Flood Warning	CTP	Lycoming, Sullivan	3 hr
Oct 21, 2:28 AM EDT	River Flood Warning	CTP	Centre, Clinton	11 hr
Oct 21, 5:46 AM EDT	Areal Flood Advisory	CTP	McKean, Warren	3 hr
Oct 21, 7:24 AM EDT	Areal Flood Warning	CTP	Centre, Clinton, Huntingdon, Lycoming, Sullivan, Tioga	8 hr
Oct 21, 8:02 AM EDT	River Flood Warning	CTP	Lycoming, Sullivan	6 hr
Oct 21, 9:05 AM EDT	Special Weather Statement	CTP	Blair	25 min
Oct 21, 9:39 AM EDT	Areal Flood Advisory	CTP	Clearfield	3 hr
Oct 21, 10:25 AM EDT	Special Weather Statement	CTP	Centre, Clinton	65 min

Nearby

Flash Flood Warnings in Pennsylvania, 2016 Every flash flood warning in 2016

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.