Alert archive / Pennsylvania / Flash Flood Warnings in 2006

Flash Flood Warning 49, NWS State College, PA

July 21, 2006Tioga County, Pennsylvania

NWS State College, PA issued this flash flood warning at Jul 21, 2006, 12:42 AM EDT for Tioga County, 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
Jul 21, 2006, 12:42 AM EDT (04:42 UTC)
Expired
Jul 21, 2006, 4:45 AM EDT
In force
4 hr
Issued by
NWS State College, PA
Area
Counties, with a storm outline in the text

County Tioga County, PA

The radar

The Binghamton radar (KBGM), 116 km from the middle of the area, began a volume at 04:46 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

TimeReportWhereRemark
Jul 21, 2:00 AM EDTFLASH FLOOD5 W Elkland, PAONE FOOT OF WATER COVERING YARDS ALONG HOLDEN BROOK ROAD.
Jul 21, 2:00 AM EDTFLASH FLOODElkland, PAWATER COVERING BUSINESS ACCESS ROADS.

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, 4.7 hours before the alert went out and 156 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, Buffalo Intl Airport, NY at 00:00Z on 2006-07-21Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 571 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, Buffalo Intl Airport, NY at 00:00Z on 2006-07-21The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 2 square meters per square second.193958Sfc1 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
571 J/kg
Mixed-layer CIN
-33 J/kg
Mixed-layer LCL
993 m above ground
0-6 km bulk shear
29 kt
0-1 km storm-relative helicity
2 m²/s²
0-3 km storm-relative helicity
51 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.

000 
WGUS51 KCTP 210443
FFWCTP
PAC117-210845-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE STATE COLLEGE PA
1242 AM EDT FRI JUL 21 2006

THE NATIONAL WEATHER SERVICE IN STATE COLLEGE PA HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  TIOGA COUNTY IN NORTH CENTRAL PENNSYLVANIA

* UNTIL 445 AM EDT

* AT 1236 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR 
  INDICATED VERY HEAVY RAIN FALLING FROM A CLUSTER OF THUNDERSTORMS 
  SITTING NEARLY STATIONARY OVER NORTHERN TIOGA COUNTY...RIGHT ALONG 
  THE NEW YORK BORDER.  THE MOST DANGEROUS AREAS WILL BE THE SMALLER 
  CREEKS AND STREAMS ALONG THE COWANESQUE RIVER AND ROUTE 49.

* LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO ELKLAND...
  KEENEYVILLE...MILLERTON...TIOGA JUNCTION AND WESTFIELD.

ADDITIONAL RAINFALL AMOUNTS OF 1 TO 2 INCHES ARE POSSIBLE IN THE 
WARNED AREA THROUGH 2 AM.

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 DONT DROWN

BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE
DANGERS OF FLOODING. IF FLASH FLOODING IS OBSERVED ACT QUICKLY. MOVE
UP TO HIGHER GROUND TO ESCAPE FLOOD WATERS. DO NOT STAY IN AREAS
SUBJECT TO FLOODING WHEN WATER BEGINS RISING.

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 ONLY TAKES A FEW INCHES OF
SWIFTLY FLOWING WATER TO CARRY VEHICLES AWAY.

PLEASE REPORT FLOODING...HAIL OR WIND DAMAGE TO THE NATIONAL WEATHER
SERVICE BY CALLING TOLL FREE...1 8 7 7 6 3 3 6 7 7 2.

LAT...LON 4201 7765 4182 7763 4183 7690 4201 7692

$$

FORECASTER: DANGELO
1 follow-up statement
000 
WGUS71 KCTP 210605
FFSCTP

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE STATE COLLEGE PA
201 AM EDT FRI JUL 21 2006

PAC117-210845-
TIOGA PA-
201 AM EDT FRI JUL 21 2006

...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 445 AM EDT FOR TIOGA
COUNTY...

AT 156 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR SHOWED THAT A 
THUNDERSTORM PRODUCING VERY HEAVY RAIN WAS MOVING TO THE EAST OUT OF 
NORTHERN TIOGA COUNTY. SOME FLOODING HAS ALREADY BEEN REPORTED IN 
ELKLAND AND NEARBY AREAS. 

MOST OF THE HEAVY RAIN HAS MOVED OUT OF THE AREA...AND ADDITIONAL 
RAINFALL AMOUNTS OF LESS THAN A HALF OF AN INCH ARE POSSIBLE IN THE 
WARNED AREA THROUGH THE REST OF THE NIGHT.  

WHILE THE HEAVIEST OF THE RAIN IS OVER...FLOODING IS STILL POSSIBLE 
AS THE RAINFALL FROM EARLIER MAKES IT INTO THE STREAMS AND 
CREEKS...ESPECIALLY PLACES ALONG THE COWANESQUE RIVER.

LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO 
ELKLAND...KEENEYVILLE...MILLERTON...TIOGA JUNCTION AND WESTFIELD.

BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE
DANGERS OF FLOODING. IF FLASH FLOODING IS OBSERVED ACT QUICKLY. MOVE
UP TO HIGHER GROUND TO ESCAPE FLOOD WATERS. DO NOT STAY IN AREAS
SUBJECT TO FLOODING WHEN WATER BEGINS RISING.

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.

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 ONLY TAKES A FEW INCHES OF
SWIFTLY FLOWING WATER TO CARRY VEHICLES AWAY.

LAT...LON 4201 7765 4182 7763 4183 7690 4201 7692

$$

FORECASTER: DANGELO

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 20, 8:08 PM EDTSevere Thunderstorm WarningCTPHuntingdon, Mifflin67 min
Jul 21, 2:34 PM EDTFlash Flood WatchCTPAdams, Bedford, Blair, Cambria, Cameron, Centre and 27 more29 hr
Jul 21, 6:48 PM EDTSevere Thunderstorm WarningCTPClinton57 min
Jul 21, 7:22 PM EDTSevere Thunderstorm WarningCTPNorthumberland53 min
Jul 21, 7:53 PM EDTSevere Thunderstorm WarningCTPSchuylkill82 min

Nearby

Flash Flood Warnings in Pennsylvania, 2006Every flash flood warning in 2006

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.