Alert archive / Pennsylvania / Flash Flood Warnings in 1986

Flash Flood Warning 1, NWS State College, PA

March 14, 1986Union County, Pennsylvania

NWS State College, PA issued this flash flood warning at Mar 14, 1986, 11:15 PM EST for Union County, Pennsylvania. It was in force for 6 hr.

The area

The counties it named.

The facts

Issued
Mar 14, 1986, 11:15 PM EST (04:15 UTC)
Expired
Mar 15, 1986, 5:00 AM EST
In force
6 hr
Issued by
NWS State College, PA
Area
Whole counties

County Union County, PA

The radar

The WSR-88D network and its archive begin in 1991, so there is no radar volume for this alert.

The nearest sounding before it

Washington/Dulle, VA (KIAD), launched 00:00Z, 4.3 hours before the alert went out and 226 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, Washington/Dulle, VA at 00:00Z on 1986-03-15Temperature 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, Washington/Dulle, VA at 00:00Z on 1986-03-15The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 248 square meters per square second.1939587897Sfc1 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
562 m above ground
0-6 km bulk shear
49 kt
0-1 km storm-relative helicity
248 m²/s²
0-3 km storm-relative helicity
454 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.

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.

In the hours before

Special weather statement, Mar 14, 8:11 PM EST, 3 hours 4 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE HARRISBURG PA.
 815 PM EST    FRI  MAR 14 1986

 ...SOME HEAVY RAINS MOVING THROUGH PORTIONS OF THE VALLEY...

WHILE THE HARRISBURG RADAR WAS OBSERVING MAINLY LIGHT RAIN ACROSS MUCH
OF THE AREA.. A BAND OF HEAVIER RAIN HAS DEVLOPED FROM NEAR HANCOCK
MARYLAND..NORTH THROUGH MT. HOLLY AND CARISLE TO NEAR SCHUYKILL HAVEN.
  THIS BAND OF HEAVY RAIN WAS MOVING TO THE NORTHEAST AT AROUND 25 MPH.

END
WS9O HAR CURLL
Special weather statement, Mar 14, 10:31 PM EST, 44 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE HARRISBURG PA.
 1030 PM EST   FRI  MAR 14 1986

 ...MODERATE TO HEAVY RAINS CONTINUE ACROSS  THE VALLEY...

THE HARRISBURG WEATHER RADAR AT 1025 PM WAS SHOWING A RATHER LARGE AREA
OF MODERATE TO OCCASSINALLY HEAVY RAIN THAT EXTENDED ACROSS MUCH OF
THE LOWER AND MIDDLE SUSQUEHANNA VALLIES AS WELL AS THE SOUTHCENTRAL
AND CENTRAL MOUNTAIN AREAS.

SO FAR IN HARRISBURG 1 .45 INCHES OF RAIN HAS FALLEN. SOME SMALL STREAMS
ARE APPROACHING BANKFULL BUT MAJOR STREAMS AND RIVERS..WHILE RISING..
ARE STILL WELL WITHIN THERE BANKS AND NO MAJOR PROBLEMS ARE EXPECTED.

RESIDENTS LIVING NEAR SMALL STREAMS SHOULD KEEP ALERT AND BE READY TO
MOVE TO HIGHER GROUND.

 THE HEAVY RAIN NOW IN THE AREA WAS MOVING TO THE NORTH AT AROUND
20 MILES AN HOUR AND SHOULD BE OUT OF THE GREATER HARRISBURG AREA
SHORTLY AFTER MIDNITE.

RAIN SHOULD GRADUALLY TAPER OFF AND END ACROSS THE AREA BY SUNUP
SATURDAY.

CURLL WSO HARRISBURG

Nearby

Flash Flood Warnings in Pennsylvania, 1986Every flash flood warning in 1986

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.