Alert archive / Pennsylvania / Flash Flood Warnings in 2012

Flash Flood Warning 1, NWS State College, PA

May 3, 2012Centre County, Clearfield County, Clinton County, Pennsylvania

NWS State College, PA issued this flash flood warning at May 3, 2012, 4:18 PM EDT for Centre County, Clearfield County, Clinton County, Pennsylvania. It was in force for 3 hr. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued
May 3, 2012, 4:18 PM EDT (20:18 UTC)
Expired
May 3, 2012, 7:15 PM EDT
In force
3 hr
Issued by
NWS State College, PA
Area
Storm-based polygon
Flood severity
None

Counties Centre County, PA, Clearfield County, PA, Clinton County, PA

The radar

The State College radar (KCCX), 23 km from the middle of the area, began a volume at 20:21 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 (KPIT), launched 12:00Z, 8.3 hours before the alert went out and 189 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-pSkew-T log-p diagram, Pittsburgh, PA at 12:00Z on 2012-05-03Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1454 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Pittsburgh, PA at 12:00Z on 2012-05-03The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 118 square meters per square second.1939Sfc1 km3 km6 km9 kmRMLM
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
1454 J/kg
Mixed-layer CIN
-47 J/kg
Mixed-layer LCL
962 m above ground
0-6 km bulk shear
23 kt
0-1 km storm-relative helicity
118 m²/s²
0-3 km storm-relative helicity
101 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

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

601 
WGUS51 KCTP 032018
FFWCTP
PAC027-033-035-032315-
/O.NEW.KCTP.FF.W.0001.120503T2018Z-120503T2315Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE STATE COLLEGE PA
418 PM EDT THU MAY 3 2012

THE NATIONAL WEATHER SERVICE IN STATE COLLEGE PA HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  NORTHEASTERN CLEARFIELD COUNTY...
  NORTHERN CENTRE COUNTY...
  WEST CENTRAL CLINTON COUNTY...

* UNTIL 715 PM EDT...

* AT 413 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
  VERY HEAVY RAIN FROM A CLUSTER OF THUNDERSTORMS OVER NORTHEASTERN
  CLEARFIELD AND NORTHERN CENTRE COUNTIES AS WELL AS A SMALL PORTION 
  OF WEST CENTRAL CLINTON COUNTY. THE STORMS WERE DRIFTING VERY 
  SLOWLY AND MANY WERE STATIONARY. SOME SPOTS MAY PICK UP OVER 3
  INCHES OF RAIN FROM THESE STORMS.

* LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO KARTHAUS...
  LECONTES MILLS...PARKER DAM STATE PARK...PENFIELD...S.B. ELLIOT
  STATE PARK...BALD EAGLE STATE PARK...MOSHANNON...PINE GLEN AND SNOW
  SHOE.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A FLASH FLOOD WARNING MEANS THAT FLOODING IS IMMINENT OR OCCURRING.
IF YOU ARE IN THE WARNING AREA MOVE TO HIGHER GROUND IMMEDIATELY.
RESIDENTS LIVING ALONG STREAMS AND CREEKS SHOULD TAKE IMMEDIATE
PRECAUTIONS TO PROTECT LIFE AND PROPERTY. NEVER ATTEMPT TO CROSS
SWIFTLY FLOWING WATERS OR WATERS OF UNKNOWN DEPTH BY FOOT OR IN AN
AUTOMOBILE. TURN AROUND DON'T DROWN!

IN HILLY TERRAIN THERE ARE HUNDREDS OF LOW WATER CROSSINGS WHICH ARE
POTENTIALLY DANGEROUS IN HEAVY RAIN. DO NOT ATTEMPT TO TRAVEL ACROSS
FLOODED ROADS. FIND ALTERNATE ROUTES. IT TAKES ONLY A FEW INCHES OF
SWIFTLY FLOWING WATER TO CARRY VEHICLES AWAY.

&&

LAT...LON 4122 7810 4117 7780 4108 7760 4098 7757
      4097 7808 4112 7861 4125 7864

$$

FORECASTER: DANGELO
2 follow-up statements
627 
WGUS71 KCTP 032119
FFSCTP

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE STATE COLLEGE PA
519 PM EDT THU MAY 3 2012

PAC027-033-035-032315-
/O.CON.KCTP.FF.W.0001.000000T0000Z-120503T2315Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
CLEARFIELD PA-CENTRE PA-CLINTON PA-
519 PM EDT THU MAY 3 2012

...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 715 PM EDT FOR WEST
CENTRAL CLINTON...NORTHERN CENTRE AND NORTHEASTERN CLEARFIELD
COUNTIES...

AT 508 PM EDT...MOST OF THE THUNDERSTORMS HAD MOVED TO THE SOUTH OF 
THE WARNED AREA...BUT UP TO 3 INCHES OF RAIN HAS FALLEN THIS 
AFTERNOON. THE HEAVY RAIN IS NOW FLOWING INTO THE STREAMS AND 
CREEKS. BEECH CREEK AND MARSH CREEK WILL SEE SHARP RISES AND MAY 
OVERFLOW THEIR BANKS. IF YOU LIVE ALONG THESE WATERWAYS...BE 
PREPARED TO MOVE TO HIGHER GROUND. 

LIGHT RAIN WILL FALL INTO THE EARLY EVENING...WITH ONLY AN ISOLATED 
SHOWER OR THUNDERSTORM POSSIBLE. ADDITIONAL RAINFALL AMOUNTS OF A 
HALF OF AN INCH ARE POSSIBLE IN THE WARNED AREA EARLY THIS EVENING.

MOST LOCATIONS IN THE WARNING ARE RURAL AREAS OF NORTHEASTERN 
CLEARFIELD...NORTHERN CENTRE AND WEST CENTRAL CLINTON COUNTIES.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF SMALL
CREEKS AND STREAMS...COUNTRY ROADS...AS WELL AS FARMLAND ALONG THE
BANKS OF CREEKS AND STREAMS.

DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE
ROADWAY. THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO CROSS
SAFELY. MOVE TO HIGHER GROUND.

&&

LAT...LON 4122 7810 4117 7780 4108 7760 4098 7757
      4097 7808 4112 7861 4125 7864

$$

FORECASTER: DANGELO
666 
WGUS71 KCTP 032311
FFSCTP

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE STATE COLLEGE PA
711 PM EDT THU MAY 3 2012

PAC027-033-035-032319-
/O.EXP.KCTP.FF.W.0001.000000T0000Z-120503T2315Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
CLEARFIELD PA-CENTRE PA-CLINTON PA-
711 PM EDT THU MAY 3 2012

...THE FLASH FLOOD WARNING WILL EXPIRE AT 715 PM EDT FOR WEST CENTRAL
CLINTON...NORTHERN CENTRE AND NORTHEASTERN CLEARFIELD COUNTIES...

THE WATERS FROM THE EARLIER HEAVY RAINS ARE RECEDING AND SHOULD NO 
LONGER POSE A THREAT TO LIFE OR PROPERTY. THEREFORE...THE FLASH 
FLOOD WARNING WILL BE ALLOWED TO EXPIRE AT 715 PM.

IF YOU ENCOUNTER ANY FLOODED ROADWAYS...DO NOT ATTEMPT TO CROSS 
THEM. FIND ANOTHER WAY TO YOUR DESTINATION OR WAIT UNTIL THE WATER 
RECEDES. 

LAT...LON 4122 7810 4117 7780 4108 7760 4098 7757
      4097 7808 4112 7861 4125 7864

$$

FORECASTER: DANGELO

The office that day

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

IssuedProductOfficeCountiesLasted
May 2, 8:01 PM EDTSevere Thunderstorm WarningCTPMcKean29 min
May 2, 8:38 PM EDTSevere Thunderstorm WarningCTPElk, McKean, Potter, Tioga, Warren52 min
May 2, 8:58 PM EDTSevere Thunderstorm WarningCTPCameron, Clinton, Elk, Lycoming, McKean, Potter and 1 more62 min
May 2, 9:19 PM EDTAreal Flood AdvisoryCTPCameron, Elk, McKean, Potter, Tioga, Warren3 hr
May 2, 9:56 PM EDTSevere Thunderstorm WarningCTPCameron, Centre, Clinton, Lycoming, Potter, Tioga34 min
May 2, 10:27 PM EDTSpecial Weather StatementCTPLycoming, Union33 min
May 2, 10:59 PM EDTSpecial Weather StatementCTPMontour, Northumberland, Snyder, Union31 min
May 3, 12:35 AM EDTSpecial Weather StatementCTPBlair25 min
May 3, 1:49 AM EDTSpecial Weather StatementCTPCumberland, Lancaster, York71 min
May 3, 5:16 AM EDTSpecial Weather StatementCTPBedford, Fulton44 min
May 3, 1:43 PM EDTSpecial Weather StatementCTPWarren47 min
May 3, 2:51 PM EDTSevere Thunderstorm WarningCTPElk, McKean39 min
May 3, 3:20 PM EDTSpecial Weather StatementCTPCameron25 min
May 3, 3:43 PM EDTAreal Flood AdvisoryCTPElk2 hr
May 3, 3:55 PM EDTSpecial Weather StatementCTPElk50 min
May 3, 4:04 PM EDTSevere Thunderstorm WarningCTPCentre, Clearfield45 min
May 3, 4:44 PM EDTSpecial Weather StatementCTPClearfield31 min
May 3, 5:04 PM EDTSpecial Weather StatementCTPCentre41 min
May 3, 5:09 PM EDTSevere Thunderstorm WarningCTPCentre, Clinton42 min
May 3, 5:18 PM EDTSpecial Weather StatementCTPCumberland57 min
May 3, 5:21 PM EDTSpecial Weather StatementCTPLycoming24 min
May 3, 5:29 PM EDTSevere Thunderstorm WarningCTPCentre, Juniata, Mifflin, Snyder, Union46 min
May 3, 6:04 PM EDTSpecial Weather StatementCTPWarren56 min
May 3, 6:13 PM EDTSpecial Weather StatementCTPJuniata, Northumberland, Perry, Snyder47 min
May 3, 6:33 PM EDTSpecial Weather StatementCTPMcKean57 min
May 3, 6:45 PM EDTSpecial Weather StatementCTPJuniata, Perry60 min
May 3, 6:56 PM EDTSpecial Weather StatementCTPDauphin, Northumberland64 min
May 3, 7:05 PM EDTSpecial Weather StatementCTPFulton25 min
May 3, 7:30 PM EDTSpecial Weather StatementCTPFulton45 min
May 3, 7:32 PM EDTSpecial Weather StatementCTPDauphin, Lebanon58 min

Nearby

Flash Flood Warnings in Pennsylvania, 2012Every flash flood warning in 2012

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.