Alert archive / Pennsylvania / Flash Flood Warnings in 2006

Flash Flood Warning 2, NWS State College, PA

May 31, 2006Somerset County, Pennsylvania

NWS State College, PA issued this flash flood warning at May 31, 2006, 4:41 PM EDT for Somerset County, Pennsylvania. It was in force for 3 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: May 31, 2006, 4:41 PM EDT (20:41 UTC)
Expired: May 31, 2006, 7:45 PM EDT
In force: 3 hr
Issued by: NWS State College, PA
Area: Counties, with a storm outline in the text

County Somerset County, PA

The radar

The Pittsburgh radar (KPBZ), 115 km from the middle of the area, began a volume at 20:41 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
May 31, 5:30 PM EDT	HEAVY RAIN 0	N Somerset, PA	2.25 INCHES OF RAINFALL IN 1 HOUR 15 MINUTES. MAX HAIL SIZE DURRING EVENT 1/4 INCH DIAMETER.
May 31, 5:30 PM EDT	HEAVY RAIN 0	Somerset, PA	ESTIMATED 2 TO 4 INCHES PER HOUR OVER THE LAST HOUR IN SOMERSET CAUSING BASEMENTS TO FLOOD AND ROAD CLOSURES. ALSO REPORTED...MULTIPLE TREES DOWN IN TOWN.

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

The nearest sounding before it

Pittsburgh, PA (KPIT), launched 12:00Z, 8.7 hours before the alert went out and 100 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: 300 J/kg
Mixed-layer CIN: -108 J/kg
Mixed-layer LCL: 1283 m above ground
0-6 km bulk shear: 0 kt
0-1 km storm-relative helicity: 0 m²/s²
0-3 km storm-relative helicity: 0 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 312044
FFWCTP
PAC111-312345-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE STATE COLLEGE PA
441 PM EDT WED MAY 31 2006

THE NATIONAL WEATHER SERVICE IN STATE COLLEGE PA HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  SOMERSET COUNTY IN SOUTH CENTRAL PENNSYLVANIA

* UNTIL 745 PM EDT

* AT 437 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR ESTIMATES   
  INDICATED VERY HEAVY RAIN OF OVER 2 INCHES HAS FALLEN WITHIN THE   
  PAST 30 MINUTES FROM A THUNDERSTORM OVER CENTRAL SOMERSET 
  COUNTY.

* LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO ACOSTA...
  BOSWELL...FRIEDENS AND SOMERSET.

THIS WILL IMPACT THE FOLLOWING CENTRAL PENNSYLVANIA INTERSTATES...THE
PENNSYLVANIA TURNPIKE BETWEEN MILE MARKERS 108 AND 117.

THIS WILL ALSO IMPACT THE FOLLOWING MAJOR ROADS...ROUTE 30...ROUTE
219.

ADDITIONAL RAINFALL AMOUNTS OF 1 TO 2 INCHES ARE POSSIBLE BETWEEN 
440 PM EDT AND 530 PM EDT IN THE WARNED AREA.

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

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 3998 7917 3994 7903 4002 7890 4012 7884
      4019 7904

$$

FORECASTER: LAMBERT

The office that day

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

Issued	Product	Office	Counties	Lasted
May 30, 9:16 PM EDT	Severe Thunderstorm Warning	CTP	Lycoming	44 min
May 30, 9:16 PM EDT	Severe Thunderstorm Warning	CTP	Lycoming	44 min
May 30, 9:50 PM EDT	Severe Thunderstorm Warning	CTP	Lycoming	55 min
May 30, 9:59 PM EDT	Severe Thunderstorm Warning	CTP	Northumberland, Union	61 min
May 30, 10:08 PM EDT	Severe Thunderstorm Warning	CTP	Columbia	97 min
May 30, 10:42 PM EDT	Severe Thunderstorm Warning	CTP	Lycoming	63 min
May 30, 11:10 PM EDT	Severe Thunderstorm Warning	CTP	Northumberland	35 min
May 30, 11:14 PM EDT	Severe Thunderstorm Warning	CTP	Schuylkill	76 min
May 31, 12:31 AM EDT	Severe Thunderstorm Warning	CTP	Juniata, Perry	44 min
May 31, 4:31 PM EDT	Severe Thunderstorm Warning	CTP	Somerset	74 min
May 31, 5:40 PM EDT	Severe Thunderstorm Warning	CTP	Cambria	65 min
May 31, 5:45 PM EDT	Flash Flood Warning	CTP	Cambria	2 hr
May 31, 6:29 PM EDT	Severe Thunderstorm Warning	CTP	Tioga	76 min
May 31, 7:53 PM EDT	Severe Thunderstorm Warning	CTP	Tioga	67 min

Nearby

Flash Flood Warnings in Pennsylvania, 2006 Every 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.