Alert archive / Pennsylvania / Flash Flood Warnings in 1993

Flash Flood Warning 20, NWS State College, PA

April 16, 1993Centre County, Pennsylvania

NWS State College, PA issued this flash flood warning at Apr 16, 1993, 6:33 AM EDT for Centre County, Pennsylvania. It was in force for 3 hr.

The area

The counties it named.

The facts

Issued: Apr 16, 1993, 6:33 AM EDT (10:33 UTC)
Expired: Apr 16, 1993, 10:00 AM EDT
In force: 3 hr
Issued by: NWS State College, PA
Area: Whole counties

County Centre County, PA

The nearest sounding before it

Pittsburgh, PA (KPIT), launched 00:00Z, 10.6 hours before the alert went out and 200 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 2593 m above ground
0-6 km bulk shear: 43 kt
0-1 km storm-relative helicity: 229 m²/s²
0-3 km storm-relative helicity: 370 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, Apr 16, 3:39 AM EDT, 2 hours 54 minutes before

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Special weather statement, Apr 16, 3:45 AM EDT, 2 hours 48 minutes before

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      <h1 id="headline">This service is currently unavailable.</h1>
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        The site you requested is temporarily down for maintenance or an unexpected outage.
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Special weather statement, Apr 16, 5:15 AM EDT, 1 hour 18 minutes before

PAZ007-008-014-161030-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE WILLIAMSPORT PA
515 AM EDT FRI APR 16 1993

...SEVERE THUNDERSTORM WATCH IN EFFECT FOR NORTHCENTRAL PENNSYLVANIA
UNTIL 700 AM...

THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM WATCH
FOR ALL OF NORTHCENTRAL PENNSYLVANIA UNTIL 700 AM. THIS
INCLUDES...TIOGA...BRADFORD...CLINTON...LYCOMING AND SULLIVAN
COUNTIES.

A SEVERE THUNDERSTORM WATCH MEANS CONDITIONS ARE FAVORABLE FOR THE
DEVELOPMENT OF SEVERE THUNDERSTORMS IN AND CLOSE TO THE WATCH AREA.
SEVERE THUNDERSTORMS CAN CONTAIN STRONG DAMAGING WINDS IN EXCESS OF 55
MPH...LARGE HAIL AND DAMAGING LIGHTNING.

PERSONS IN THE PATH OF THESE STORMS SHOULD TAK8E COVER IF THREATENING
WEATHER APPROACHES. INTERIOR LOCATIONS OF A STURDY BUILDING PROVIDE
THE BEST PROTECTION AGAINST SEVERE THUNDERSTORMS.

PMG/HM

Special weather statement, Apr 16, 5:27 AM EDT, 1 hour 6 minutes before

PAZ006-008-009-013-014-161100-

SPECIAL WEATHER STATEMENT...SEVERE THUNDERSTORM WATCH
NATIONAL WEATHER SERVICE HARRISBURG PA
515 AM EDT FRI APR 16 1993

...A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 7 AM FOR MUCH OF CENTRAL
   PENNSYLVANIA...INCLUDING PORTIONS OF THE SOUTH CENTRAL MOUNTAINS AND LOWER
   SUSQUEHANNA VALLEY....

...SHOWERS AND THUNDERSTORMS ARE MOVING THROUGH THE CENTRAL MOUNTAINS...

AT 515 AM HARRISBURG RADAR WAS SHOWING AN AREA OF SHOWERS AND THUNDERSTORMS...
SOME WITH HEAVY RAIN ACROSS THE CENTRAL AND LAUREL MOUNTAINS. THE SHOWERS AND
THUNDERSTORMS WERE NOW BEGINNING TO MOVE INTO WESTERN PORTIONS OF THE
SUSQUEHANNA VALLEY. THE STRONGEST STORMS WERE OVER BLAIR AND BEDFORD COUNTIES
IN THE SOUTH CENTRAL MOUNTAINS. INDIVIDUAL CELLS WERE MOVING NORTHEAST AT 50
MPH WHILE THE ENTIRE AREA WAS SLIDING EAST AT ABOUT 30 MPH.

THESE THUNDERSTORMS MAY PRODUCE HEAVY DOWNPOURS...DAMAGING WINDS AND HAIL AS
THEY MOVE EAST INTO THE SUSQUEHANNA VALLEY.

IF THREATENING WEATHER APPROACHES...GO TO A SAFE PLACE IMMEDIATELY. IF YOU ARE
DRIVING...PULL OVER AND TAKE COVER IN A LOW SPOT. WATCH FOR PONDING WATER AS
WELL. ALSO...ALLOW FOR A LITTLE EXTRA TIME IN YOUR MORNING COMVMUTE TO WORK.

IF SEVERE WEATHER IS OBSERVED...CONTACT YOUR LOCAL LAW ENFORCEMENT AGENCY AND
ASK THEM TO RELAY YOUR REPORT TO THE NATIONAL WEATHER SERVICE. STAY TUNED TO
NOAA WEATHER RADIO FOR LATER STATEMENTS AND POSSIBLE WARNINGS.

RODGERS

Special weather statement, Apr 16, 5:30 AM EDT, 1 hour 3 minutes before

PAZ007-008-014-161030-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE WILLIAMSPORT PA
530 AM EDT FRI APR 16 1993

...SEVERE THUNDERSTORM WATCH IN EFFECT FOR NORTHCENTRAL PENNSYLVANIA
UNTIL 700 AM...

THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM WATCH
FOR ALL OF NORTHCENTRAL PENNSYLVANIA UNTIL 700 AM. THIS
INCLUDES...TIOGA...BRADFORD...CLINTON...LYCOMING AND SULLIVAN
COUNTIES.

A SEVERE THUNDERSTORM WATCH MEANS CONDITIONS ARE FAVORABLE FOR THE
DEVELOPMENT OF SEVERE THUNDERSTORMS IN AND CLOSE TO THE WATCH AREA.
SEVERE THUNDERSTORMS CAN CONTAIN STRONG DAMAGING WINDS IN EXCESS OF 55
MPH...LARGE HAIL AND DAMAGING LIGHTNING.

AT 515 AM EDT SHOWED AN AREA OF SHOWESR AND LOCALLY STRONG
THUNDERSTORMS OVER WESTERN AND CENTRAL PENNSYLVANIA. THE LEADING EDGE
OF THIS AREA EXTENDED INTO WESTERN BRADFORD AND EASTERN LYCOMING
COUNTIES IN NORTHCENTRAL PENNSYLVANIA. THE STRONGEST THUNDERSTORMS
WERE IN CENTRE AND BLAIR COUNTIESf.

PERSONS IN THE PATH OF THESE STORMS SHOULD TAKE COVER IF THREATENING
WEATHER APPROACHES. INTERIOR LOCATIONS OF A STURDY BUILDING PROVIDE
THE BEST PROTECTION AGAINST SEVERE THUNDERSTORMS.

PMG/HM

Special weather statement, Apr 16, 6:20 AM EDT, 13 minutes before

PAZ007-008-014-161100-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE WILLIAMSPORT PA
620 AM EDT FRI APR 16 1993

...SEVERE THUNDERSTORM WATCH IN EFFECT FOR NORTHCENTRAL PENNSYLVANIA
UNTIL 700 AM...

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT FOR ALL OF NORTHCENTRAL
PENNSYLVANIA UNTIL 700 AM. THIS INCLUDES TIOGA... BRADFORD...
CLINTON...LYCOMING AND SULLIVAN COUNTIES.

A SEVERE THUNDERSTORM WATCH MEANS CONDITIONS ARE FAVORABLE FOR THE
DEVELOPMENT OF SEVERE THUNDERSTORMS IN AND CLOSE TO THE WATCH AREA.
SEVERE THUNDERSTORMS CAN CONTAIN STRONG DAMAGING WINDS IN EXCESS OF 55
MPH...LARGE HAIL AND DAMAGING LIGHTNING.

AT 610 AM EDT SHOWED AN AREA OF SHOWERS AND LOCALLY STRONG
THUNDERSTORMS OVER WESTERN AND CENTRAL PENNSYLVANIA. THE LEADING EDGE
OF THIS AREA EXTENDED INTO CENTRAL BRADFORD AND WESTERN SULLIVAN
COUNTIES IN NORTHCENTRAL PENNSYLVANIA. THE STRONGEST THUNDERSTORMS
WERE IN A THIN LINE EXTENDING FROM RENOVA IN CLINTON COUNTY TO STATE
COLLEGE...HUNTINGDON AND EVERETT IN BEDFORD COUNTY. THE THUNDERSTORMS
WERE MOVING NORTHEAST ABOUT 40 MPH.

PERSONS IN THE PATH OF THESE STORMS SHOULD TAKE COVER IF THREATENING
WEATHER APPROACHES. INTERIOR LOCATIONS OF A STURDY BUILDING PROVIDE
THE BEST PROTECTION AGAINST SEVERE THUNDERSTORMS.

PMG/HM

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 16, 6:54 AM EDT	Flash Flood Warning	CTP	Huntingdon	3 hr
Apr 16, 9:19 AM EDT	Severe Thunderstorm Warning	CTP	Cumberland	56 min
Apr 16, 9:24 AM EDT	Flash Flood Warning	CTP	Franklin	7 hr
Apr 16, 9:30 AM EDT	Severe Thunderstorm Warning	CTP	Lycoming	60 min
Apr 16, 9:45 AM EDT	Severe Thunderstorm Warning	CTP	Union	60 min
Apr 16, 9:59 AM EDT	Severe Thunderstorm Warning	CTP	Bradford	31 min
Apr 16, 10:15 AM EDT	Flash Flood Warning	CTP	Clinton	4 hr
Apr 16, 10:15 AM EDT	Flash Flood Warning	CTP	Bradford	4 hr
Apr 16, 11:25 AM EDT	Flash Flood Warning	CTP	Cumberland, Dauphin, York	6 hr
Apr 16, 12:25 PM EDT	Flash Flood Warning	CTP	Tioga	110 min
Apr 16, 1:56 PM EDT	Flash Flood Warning	CTP	Bradford, Clinton, Lycoming, Sullivan, Tioga	4 hr
Apr 16, 3:55 PM EDT	Flash Flood Warning	CTP	Lancaster	5 hr
Apr 16, 4:14 PM EDT	Flash Flood Warning	CTP	Franklin, Huntingdon	5 hr
Apr 16, 5:15 PM EDT	Flash Flood Warning	CTP	Bradford, Clinton, Lycoming	5 hr
Apr 16, 7:48 PM EDT	Severe Thunderstorm Warning	CTP	Fulton	57 min

Nearby

Flash Flood Warnings in Pennsylvania, 1993 Every flash flood warning in 1993

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.