Alert archive / Pennsylvania / Flash Flood Warnings in 1999

Flash Flood Warning 22, NWS State College, PA

January 24, 1999Huntingdon County, Pennsylvania

NWS State College, PA issued this flash flood warning at Jan 24, 1999, 9:23 AM EST for Huntingdon County, Pennsylvania. It was in force for 3 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
Jan 24, 1999, 9:23 AM EST (14:23 UTC)
Expired
Jan 24, 1999, 12:00 PM EST
In force
3 hr
Issued by
NWS State College, PA
Area
Whole counties

County Huntingdon County, PA

The radar

The State College radar (KCCX), 56 km from the middle of the area, began a volume at 14:24 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.

The nearest sounding before it

Pittsburgh, PA (KPIT), launched 12:00Z, 2.4 hours before the alert went out and 179 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, Pittsburgh, PA at 12:00Z on 1999-01-24Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Pittsburgh, PA at 12:00Z on 1999-01-24The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -66 square meters per square second.1939587897117136156Sfc1 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
711 m above ground
0-6 km bulk shear
72 kt
0-1 km storm-relative helicity
-66 m²/s²
0-3 km storm-relative helicity
-201 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 
TTAA00 KCTP 241423
FFWCTP
PAC061-241700-

BULLETIN - EAS ACTIVATION REQUESTED
FLOOD WARNING
NATIONAL WEATHER SERVICE STATE COLLEGE PA
923 AM EST SUN JAN 24 1999

THE NATIONAL WEATHER SERVICE IN STATE COLLEGE HAS ISSUED A

* FLOOD WARNING FOR...
  HUNTINGDON COUNTY IN SOUTH CENTRAL PENNSYLVANIA.

* UNTIL 1200 PM EST.

* EMERGENCY MANAGEMENT AGENCY OFFICIALS REPORT FLOODING IN SHIRLEY
  TOWNSHIP AT GILBO...NEAR RUNKS BRIDGE. SEVERAL ROADS HAVE BEEN
  CLOSED.

  IN ADDITION...A 300 YARD LONG ICE JAM EXISTS ON THE AUGHWICK
  CREEK NEAR THE CROMWELL...SHIRLEY TOWNSHIP LINE. NO FLOODING IS
  BEING REPORTED NEAR THIS ICE JAM AT THIS TIME.

DON'T DRIVE INTO AREAS WHERE WATER COVERS THE ROAD!

.END/LA CORTE


&

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 Jan 24, 9:20 AM EST, 3 minutes earlier.

Area forecast discussion, Jan 24, 9:20 AM EST, 3 minutes before
CENTRAL PENNSYLVANIA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE STATE COLLEGE PA
920 AM EST MON JAN 24 1999

...WORK ZONES WILL BE SENT BY 1015 AM AS PHLADMCTP...

...ZONES TO FOLLOW BETWEEN BY 1045 AM...

BANDS OF FAIRLY HEAVY SNOW RACING ACROSS N PA...AS STRONG JET
MAX IS PRESENT ACROSS THE AREA.

SYSTEM IS MOVING FAST...SO AMOUNTS WILL NOT BE A LOT.  WILL
ADJUST FCST AS NEEDED.

EXPECT MUCH OF THE DECENT SNOW WILL BE GONE BY LATE MORNING
OR EARLY AFT.

00Z NGM A LITTLE COLDER FOR TONIGHT THAN THE ONE I SAW
YESTERDAY...BUT CURRENT FCST NOT BAD...THUS WILL NOT CHANGE OTHER
PERIODS FOR NOW.

WILL MOST LIKELY FINE TUNE FCST FOR FRI FOR N AND W AREAS
AFTER I GET A GOOD LOOK AT THE MODELS THIS AFT...BUT STILL
CONCERN THAT LACK OF SNOW COVER WILL ALLOW TEMPS TO SOAR
THIS WEEK...THUS WILL HAVE TO SLIP MAIN FRONT BACK TO THE SOUTH
EITHER LATE WED OR THU...TO GET ANY COOL AIR MUCH FURTHER SOUTH
THAN THE NY/PA BORDER OR ROUTE 6...UNLESS THERE IS SNOW COVER OR A
DECENT PUSH OF COLD AIR.

IN TERMS OF SNOW COVER...NEXT FEW DAYS WILL SLOWLY EAT AWAY AT THE
ICE...ESP. ON WED.  NIGHTS WILL PUT A BRAKE ON THE SPEED OF THE
MELT...THUS GIVING US TIME TO DRY OUT AND RETURN TO MORE OF A
NORMAL SITUATION ON AREA STREAMS AND RIVERS.

EITHER WAY...LOOKS LIKE ANOTHER LESS THAN PERFECT WEEKEND TAKING
FORM.

.CTP...NONE.

MARTIN

The office that day

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

IssuedProductOfficeCountiesLasted
Jan 23, 7:32 PM ESTFlash Flood WarningCTPHuntingdon6 hr
Jan 23, 10:40 PM ESTFlash Flood WarningCTPCentre6 hr
Jan 23, 11:01 PM ESTFlash Flood WarningCTPJuniata, Mifflin6 hr
Jan 24, 1:58 AM ESTFlash Flood WarningCTPHuntingdon3 hr
Jan 24, 3:58 AM ESTFlash Flood WarningCTPNorthumberland, Union4 hr
Jan 24, 4:39 AM ESTFlash Flood WarningCTPCentre, Huntingdon, Juniata, Mifflin3 hr
Jan 24, 7:51 AM ESTFlash Flood WarningCTPCentre4 hr
Jan 24, 7:51 AM ESTFlash Flood WarningCTPJuniata4 hr
Jan 24, 8:00 AM ESTFlash Flood WarningCTPColumbia, Northumberland4 hr
Jan 24, 8:00 AM ESTFlash Flood WarningCTPUnion4 hr
Jan 24, 11:59 AM ESTFlash Flood WarningCTPHuntingdon4 hr
Jan 24, 11:59 AM ESTFlash Flood WarningCTPColumbia4 hr
Jan 24, 11:59 AM ESTFlash Flood WarningCTPUnion4 hr
Jan 24, 1:16 PM ESTFlash Flood WarningCTPLycoming3 hr

Nearby

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

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; radar from the NEXRAD Level II archive.