Alert archive / Pennsylvania / Flash Flood Warnings in 2000

Flash Flood Warning 28, NWS State College, PA

July 31, 2000McKean County, Pennsylvania

NWS State College, PA issued this flash flood warning at Jul 31, 2000, 6:45 PM EDT for McKean County, Pennsylvania. It was in force for 2 hr. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued
Jul 31, 2000, 6:45 PM EDT (22:45 UTC)
Expired
Jul 31, 2000, 8:45 PM EDT
In force
2 hr
Issued by
NWS State College, PA
Area
Whole counties

County McKean County, PA

The nearest sounding before it

Buffalo Intl Airport, NY (KBUF), launched 12:00Z, 10.8 hours before the alert went out and 125 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 12:00Z on 2000-07-31Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 922 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 12:00Z on 2000-07-31The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 60 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
922 J/kg
Mixed-layer CIN
-54 J/kg
Mixed-layer LCL
840 m above ground
0-6 km bulk shear
21 kt
0-1 km storm-relative helicity
60 m²/s²
0-3 km storm-relative helicity
80 m²/s²
Significant tornado parameter
0.0
Supercell composite
1.0

Open this sounding in Storm Lab

The text

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

000 
WGUS51 KCTP 312253
FFWCTP
PAC083-010045-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE STATE COLLEGE PA
645 PM EDT MON JUL 31 2000

THE NATIONAL WEATHER SERVICE IN STATE COLLEGE PA HAS CONTINUED A

* FLASH FLOOD WARNING FOR...
  MCKEAN COUNTY.

* UNTIL 845 PM EDT.

* AT 645 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED 
  AN AREA OF SHOWERS AND THUNDERSTORMS WITH HEAVY RAINFALL OVER 
  EASTERN AND NORTHERN MCKEAN COUNTY. THESE SHOWERS AND 
  THUNDERSTORMS WERE MOVING NORTHEAST AT 15 MPH. 

THE HEAVIEST RAINFALL WHICH CAUSED FLASH FLOODING EARLIER IN THE 
BRADFORD AREA HAS MOVED OUT OF MCKEAN COUNTY. SOME FLOODING OF 
STREAMS AND CREEKS CONTINUES...AND SOME ROADWAYS WILL REMAIN FLOODED 
THROUGH 845 PM. 

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.

$$

JUNG

LAT...LAON 4192 7885 4167 7873 4166 7829 4196 7826

&

What forecasters said that day

The local office's own words before this flash flood warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS State College, PA wrote its last area forecast discussion before this flash flood warning went out at Jul 31, 1:50 PM EDT, 4 hours 55 minutes earlier.

Area forecast discussion, Jul 31, 1:50 PM EDT, 4 hours 55 minutes before
CENTRAL PENNSYLVANIA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE STATE COLLEGE PA
150 PM EDT MON JUL 31 2000

CU FILLED IN FAST LATE THIS AM AS THE HI MSTR CONTENT OF THE LLVLS
LWRD THE CONVCTV TEMP. RDR LIGHTING UP ATTM W/A LINE OF HEAVY
RAINERS ALREADY ALONG THE SPINE OF THE ALLEGH FNT. THESE THINGS WILL
JUST PERSIST IN THIS ORIENTATION AS THE VWP SHWS NO DIRECTIONAL
SHEAR AND LTL SPEED SHEAR THRU ALL LYRS.  FFA IS BEING SERIOUSLY
CONSIDERED FOR TONIGHT - WL LIKELY GO FOR ALL OF FA DUE TO CURR
CONDITIONS AND XPCTD EXPANSION OF RAIN THRU THE NIGHT.

MAIN ACTION FOR NEXT FEW DAYS SEEMS TO BE TONIGHT. ALL MDL PROGS NOW
BECMG MORE DEFINED ON A RELATIVE MINIMUM OF FORCING AND QPF DURING
LAST HALF OF TUESDAY TO WED NOON. THIS APPEARS TO BE SOMETHING TO
LATCH ONTO. BUT BEFORE THEN...THE HI MOISTURE AND MAINLY AFTN/EVEN
CONVECTION WL LIKELY CONTINUE IN EARNEST. LOWER POPS IN ORDER FOR
TUE NIGHT AND EVEN DAYTIME ON WED.

XTNDD: THINGS LOOKING SLIGHTLY MORE OPTIMISTIC FOR SAT...BUT DRY
WEEKENDS HV BEEN TOUGH TO COME BY LATELY. WL GO WITH PC...THOUGH AS
THE UPR LOW SHUD BE FILLING AND LIFTING NORTH LATER IN THE WEEK.

WORK ZNS BY 3 PM.

.CTP...FFA FOR ALL OF FA TONIGHT.

DANGELO

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 30, 8:25 PM EDTFlash Flood WarningCTPColumbia3 hr
Jul 31, 1:50 AM EDTFlash Flood WarningCTPColumbia3 hr
Jul 31, 1:58 PM EDTFlash Flood WarningCTPClearfield4 hr
Jul 31, 2:08 PM EDTFlash Flood WarningCTPSomerset3 hr
Jul 31, 3:44 PM EDTFlash Flood WarningCTPMcKean3 hr
Jul 31, 4:40 PM EDTFlash Flood WarningCTPElk3 hr
Jul 31, 7:40 PM EDTFlash Flood WarningCTPClearfield110 min

Nearby

Flash Flood Warnings in Pennsylvania, 2000Every flash flood warning in 2000

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.