Flash Flood Warning 37, NWS State College, PA

Issued

Aug 20, 1999, 2:05 PM EDT (18:05 UTC)

Expired

Aug 20, 1999, 5:15 PM EDT

In force

3 hr

Issued by

NWS State College, PA

Area

Whole counties; the outline is the Mesonet’s reconstruction

County Union County, PA

000 
TTAA00 KCTP 201806
FFWCTP
PAC097-109-119-093-067-202115-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE STATE COLLEGE PA
205 PM EDT FRI AUG 20 1999

THE NATIONAL WEATHER SERVICE IN STATE COLLEGE PA HAS EXTENDED THE

* FLASH FLOOD WARNING FOR...
  SNYDER COUNTY.
  UNION COUNTY.
  NORTHUMBERLAND COUNTY.
  MONTOUR COUNTY
  JUNIATA COUNTY

* UNTIL 515 PM EDT.

* AT 200 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED   
  TO SHOW AN AREA OF SHOWERS AND THUNDERSTORMS FROM                  
  MCALISTERVILLE...NORTH THOUGHT SELINSGROVE AND LEWISBURG TO       
  WATSONTOWN.

AS OF 140 PM EDT...10 STREETS IN LEWISBURG AND 3 STREETS IN 
MIFFLINBURG WERE CLOSED DUE TO FLOODING. ROUTE 35 IN JUNIATA COUNTY 
WAS ALSO CLOSED DUE TO FLOODING. BETWEEN 3 AND 6 INCHES OF RAIN HAS 
BEEN REPORTED IN THE AREA. 

THE HEAVY RAIN IN THESE THUNDERSTORMS...COMBINED WITH THEIR SLOW 
MOVEMENT AND THE FORMATION OF ADDITIONAL THUNDERSTORM IS INCREASING 
THE SERIOUSNESS OF THIS SITUATION. BE PREPARED TO TAKE QUICK ACTION 
IF FLOODING BECOMES MORE DANGEROUS.

DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE
ROADWAY. VEHICLES CAUGHT IN RISING WATER SHOULD BE ABANDONED. MOVE TO
HIGHER GROUND.

.END/ DUNHAM/ONDREJIK

LAT...LON 4071 7735 4071 7670 4110 7670 4109 7718

NWS State College, PA wrote its last area forecast discussion before this flash flood warning went out at Aug 20, 1:45 PM EDT, 20 minutes earlier.

CENTRAL PENNSYLVANIA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE STATE COLLEGE PA
145 PM EDT FRI AUG 20 1999

BUSY MORNING...AS PV LOBE MET UP W/AREA OF OROGRAPHIC ENHANCEMENT TO
CONTINUALLY REGENERATE TSRA W/BIG PCPN NUMS OV MID SUSQ VLY. WE GOT
OUR SERVICE HYDROLOGISTS/ FEET WET TODAY...AS THE DROUGHT HAS
PRECLUDED ANY FLOODING PROBLEMS AS OF LATE. RDR TRENDS CONT TO DEVLP
SHRA/TSRA OV CENT PA (ESP JUST TO S OF STC ON TUSSEY MTN)... AND
PUSHING MOD RAFL INTO NE PA ATTM.

ALL MDLS COMING TOGETHER ON THE OPEN WAVE SCENARIO...FINALLY. AXIS
OF HEAVIEST PCPN TO FALL IN NW/SE ORIENTED LINE JUST TO N AND E OF
AREAS W/PROBLEMS NOW. UGH. THE PIVOT OF BIG TIME QPFS ON MOST OF THE
MDLS RIGHT OV THAT REGION...AND THUS...FFA MAY BE NEEDED FOR TONIGHT
INTO SAT. STORM MOTION VECTORS CONT TO BE VERY SLIGHT TO THE N&E.
PWS WL RIDE NEAR 2...BUT POSSIBLE TROPICAL CONNECTION NOT ACCOUNTED
FOR IN THIS CALC. SPC JUST PERKED UP TO THESE SLOW MOVERS...HPC
MENTIONED IT YSTDY IN PERSONAL CONVERSATION - GOOD DEAL NCEP  WL
HOLD THE FFA JUST N OF MDT AT THIS TIME...BUT INCLUDE UNV AND BFD-
WHERE MUCHO WATER HAS ALREADY FALLEN.

SINCE MDLS ARE COMING TOGETHER...RIGHT NOW...OVER ME...I WL ROLL
WITH THE FLOW. TAPERING POPS IN OUR SWRN COS AND KEEPING MENTION OF
TORRENTIAL DOWNPOURS IN PLACES FM UNV N&E. WON/T GET TOO WORDY WITH
DETAILS OF FCST NOW OTHER THAN TO SAY THINGS LOOK TO TAPER OFF W/
ONLY WRAP AROUND LEFT BY SAT NITE. XTNDD THOUGHTS: PUT IN MENTION OF
SHRA ON MON...AND LEAVE TUE/WED AS FAIR WORDINGS.

WORK ZONE WIBIS BY 330 PM...AS TIME IS TIGHT THIS AFTN.

.CTP...FFA TONGIGHT AND SAT FOR NRN MTNS AND MID/UPR SUSQ VLYS.

DANGELO

Flash Flood Warnings in Pennsylvania, 1999Every flash flood warning in 1999

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.