Flash Flood Warning 33, NWS State College, PA

Issued

Aug 20, 1999, 11:25 AM EDT (15:25 UTC)

Expired

Aug 20, 1999, 2:15 PM EDT

In force

3 hr

Issued by

NWS State College, PA

Area

Whole counties; the outline is the Mesonet’s reconstruction

County Juniata County, PA

000 
TTAA00 KCTP 201525
FFWCTP
PAC067-201815-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE STATE COLLEGE PA
1125 AM EDT FRI AUG 20 1999

THE NATIONAL WEATHER SERVICE IN STATE COLLEGE PA HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  EASTERN JUNIATA COUNTY.

* UNTIL 215 PM EDT.

* AT 1118 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED
  TO INDICATE A THUNDERSTORM WITH VERY HEAVY RAINFALL NEAR MAZE AND
  MCALISTERVILLE...THAT WAS NEARLY STATIONARY.

SLOW MOVING THUNDERSTORMS ARE PRODUCING TORRENTIAL RAINFALL IN THE 
WARNED AREA. OVER TWO INCHES OF RAIN HAS FALLEN IN THE PAST HOUR 
NEAR MAZE AND RICHFIELD. FLASH FLOODING IS LIKELY TO OCCUR ANYWHERE TO 
THE NORTH AND EAST OF ROUTE 22 OVER EASTERN JUNIATA COUNTY. 

SMALL CREEKS AND STREAMS WILL RAPIDLY FLOOD...POSSIBLY WASHING OUT
ROADS AND FLOODING NEARBY LOW AREAS.

A FLASH FLOOD WARNING MEANS THAT FLOODING IS OCCURRING OR IS
IMMINENT. NEVER ATTEMPT TO CROSS HIGH W"ATER IN A VEHICLE OR ON FOOT!

.END/ DANGELO

LAT...LON 4058 7740 4056 7721 4063 7697 4069 7724

NWS State College, PA wrote its last area forecast discussion before this flash flood warning went out at Aug 20, 9:30 AM EDT, 1 hour 55 minutes earlier.

CENTRAL PENNSYLVANIA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE STATE COLLEGE PA
930 AM EDT FRI AUG 20 1999

DECENT RAIN TOTALS THIS AM IN THE CITY OF BFD...NEARLY 4 INCHES FM
STORM SPOTTERS AND ON THE 88D ESTIMATES BOTH. SHOWERY RAFL W/VERY
LTL THUNDER (BUT STILL LOOKING CONVECTIVE IN NATURE) STRETCHES FM
FINGER LAKES ALL THE WAY TO LWR SUSQ. BEST RAFL THERE IS S OF IPT.
ALL THIS RA LOOKS TO BE MOVG VERY SLOLY TO THE N AND E. SOME DVLPMNT
NOW BACK INTO CENTRAL PA VERY CLOSE TO UNV...AND RIGHT ARND MDT.

MDLS SO DIVERGANT EVEN THE FIRST PDS ARE WIDELY DIFF. YSTDY/S ETA
DID HAVE THE AREA OF PCPN VERY CORRECT YSTDY. THIS IN CONTRAST TO
THINKING YSTDY.  SO...TAKING A LOOK AT M-ETA FOR NEXT FEW HRS...IT
HAS SOMEWHAT OF A HANDLE ON CURR TRENDS...AS IT MOVES THAT PCPN VERY
LTL...BUT DEVELOPS PCPN OV FAR SC PA NR HGR. AS THE M-ETA IS TIED
CLOSELY TO THE ETA...IT ZIPS THE SFC LOW OFF TO THE EAST AND OFF THE
COAST MUCH FASTER...AND PUTS US BACK INTO THE MAINLY DRY ZONE BY
ERLY SAT MORN.

WL TAKE OUT TIMING OF PRECIP FOR MOST PART...AND ADD THUNDER FOR THE
AREAS TO OUR EAST AND SOUTH. TEMPS TO BE LEFT AS IS.

.CTP...NONE.

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.