Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 1997

Severe Thunderstorm Warning 22, NWS State College, PA

May 6, 1997Columbia County, Pennsylvania

NWS State College, PA issued this severe thunderstorm warning at May 6, 1997, 9:55 AM EDT for Columbia County, Pennsylvania. It was in force for 50 min. 1 report came from inside the area while it was in force.

The area

The counties it named, with what was reported inside it.

The facts

Issued
May 6, 1997, 9:55 AM EDT (13:55 UTC)
Expired
May 6, 1997, 10:45 AM EDT
In force
50 min
Issued by
NWS State College, PA
Area
Whole counties

County Columbia County, PA

The radar

The Binghamton radar (KBGM), 133 km from the middle of the area, began a volume at 13:54 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.

What was reported inside it

TimeReportWhereRemark
May 6, 10:05 AM EDTThunderstorm Wind 51Millville, PATrees were blown across a road near Millville and marble size hail was reported.

NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in.

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

IssuedProductOfficeLasted
May 6, 9:30 AM EDTSevere Thunderstorm WatchSPC6 hr

The nearest sounding before it

Phillips Aaf/Abe, MD (KAPG), launched 12:00Z, 1.9 hours before the alert went out and 177 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, Phillips Aaf/Abe, MD at 12:00Z on 1997-05-06Temperature 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 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Phillips Aaf/Abe, MD at 12:00Z on 1997-05-06The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 111 square meters per square second.19395878Sfc1 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
1321 m above ground
0-6 km bulk shear
50 kt
0-1 km storm-relative helicity
111 m²/s²
0-3 km storm-relative helicity
112 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.

675 
WUUS01 KCTP 061355 RRA
SVRCTP
PAC037-061445-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE STATE COLLEGE PA
955 AM EDT TUE MAY 6 1997
 
THE NATIONAL WEATHER SERVICE IN STATE COLLEGE HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 1045 AM EDT
FOR PEOPLE IN THE FOLLOWING LOCATIONS......
 
IN  PENNSYLVANIA
 
   ...COLUMBIA COUNTY
 
AT 950 AM EDT STATE COLLEGE DOPPLER RADAR INDICATED A SEVERE
THUNDERSTORM JUST EAST OF HUGHESVILLE. THE STORM IS MOVING SOUTHEAST AT
45 MPH AND WILL CROSS BLOOMSBURG AREA SHORTLY AFTER 10 AM.
 
WIND GUSTS TO 60 MPH WERE REPORTED BY A SKYWARN SPOTTER JUST EAST OF
HUGHESVILLE WITH THIS STORM AT 948 AM.
 
WHEN THUNDERSTORMS ARE OCCURRING...PEOPLE SHOULD MOVE INSIDE A
STRONG BUILDING.  DO NOT STAND BY WINDOWS.  DONT USE TELEPHONES
OR ELECTRICAL APPLIANCES UNLESS IN AN EMERGENCY UNTIL THE STORM
HAS PASSED.  MOTORISTS SHOULD NOT DRIVE INTO LOW WATER CROSSINGS.
 
DUNHAM

What forecasters said that day

The local office's own words before this severe thunderstorm 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 severe thunderstorm warning went out at May 6, 2:31 AM EDT, 7 hours 24 minutes earlier.

Area forecast discussion, May 6, 2:31 AM EDT, 7 hours 24 minutes before
CENTRAL PENNSYLVANIA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE STATE COLLEGE PA
220 AM EDT TUE MAY 6 1997

PHL...THANX FOR CORD.
PIT...PHL NOT ISSUING FROST ADV...DAYSHIFT CAN ISSUE FROST ADV IF
NEEDED FOR S-CENTRAL MTNS.

SCT SHOWERS MOVING ACROSS CWA ATTM (LAST HR...ACTIVITY APPEARS TO
BE ON THE WANE). VAD WINDS SHOW 50 KT JET AT 5 KFT WHICH HAS
HELPED FEED THESE MOISTURE STARVED SHOWERS. LOW LEVEL JET PROGGED
TO MOVE INTO S NY BY 12Z.

RAPIDLY MOVING COLD FRONT OVER NW OH FCST TO SLIDE INTO CENTRAL
PA ARND 14Z AND MOVE WELL EAST OF THE STATE BY AFTN. 5H TROF AXIS
ACROSS AREA AND TEMPS OF -26C ADVECTING INTO AREA EXPECT
INSTABILITY -SHRA TO HANG AROUND AND MAYBE A TSTM EARLY THIS
AFTN.

HIGH PRESSURE TO WORK INTO FCST/A TONIGHT. SHOULD WINDS BECOME
CALM ACROSS W PA TONIGHT...TEMPS WILL FALL BELOW MOS VALUES
ALLOWING FOR A HARD FREEZE NW PA AND FROST ACROSS THE SOUTH.

HIGH PRESSURE ACROSS THE AREA WILL KEEP US MO SUNNY ONf WED.

FCST...
TODAY...MOSTLY CLOUDY/VAR CLDS WITH (50 POPS NORTH/40 POPS SOUTH)
SHOWERS AND POSSIBLY A TSTM. WINDY ALSO.

TONIGHT...BECOMING CLR AND COLD. FROST SW PA/FREEZE NW PA
(DAYSHIFT CAN ISSUE ADV).

WED...MOSTLY SUNNY.

WINTHER

In the hours before

Special weather statement, May 6, 9:32 AM EDT, 23 minutes before
PAZ012-025>028-033>036-041-042-045-046-049>053-056>059-063>066-06
1800-
SPECIAL WEATHER STATEMENT   CORRECTED FOR DATE
NATIONAL WEATHER SERVICE STATE COLLEGE PA
932 AM EDT TUE MAY 6 1997

...THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM
WATCH FOR THE FOLLOWING COUNTIES...

...SOMERSET...BEDFORD...BLAIR...FRANKLIN...FULTON...HUNTINGDON...
JUNIATA...MIFFLIN...

LYCOMING...SULLIVAN...COLUMBIA...MONTOUR...NORTHUMBERLAND....
PERRY...SCHUYLKILL...SNYDER...UNION...

ADAMS...CUMBERLAND...DAUPHIN...LANCASTER...LEBANON...
YORK...

REMEMBER...A SEVERE THUNDERSTORM WATCH MEANS THAT CONDITIONS ARE
FAVORABLE FOR DAMAGING THUNDERSTORMS TO DEVELOP IN AND CLOSE TO
THE WATCH AREA.

HAVE A SAFE SHELTER NEARBY.  LISTEN FOR POSSIBLE WARNINGS AND BE
READY TO MOVE TO SAFE SHELTER IF THREATENING WEATHER APPROACHES.

STAY UPDATED WITH THE LATEST FORECASTS FROM NOAA WEATHER RADIO OR
YOUR FAVORITE RADIO...TV OR CABLE TV STATION.

DUNHAM
Special weather statement, May 6, 9:32 AM EDT, 23 minutes before
PAZ012-025>028-033>036-041-042-045-046-049>053-056>059-063>066-06
1800-
SPECIAL WEATHER STATEMENT   CORRECTED FOR DATE
NATIONAL WEATHER SERVICE STATE COLLEGE PA
932 AM EDT TUE MAY 6 1997

...THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM
WATCH FOR THE FOLLOWING COUNTIES...

...SOMERSET...BEDFORD...BLAIR...FRANKLIN...FULTON...HUNTINGDON...
JUNIATA...MIFFLIN...

LYCOMING...SULLIVAN...COLUMBIA...MONTOUR...NORTHUMBERLAND....
PERRY...SCHUYLKILL...SNYDER...UNION...

ADAMS...CUMBERLAND...DAUPHIN...LANCASTER...LEBANON...
YORK...

REMEMBER...A SEVERE THUNDERSTORM WATCH MEANS THAT CONDITIONS ARE
FAVORABLE FOR DAMAGING THUNDERSTORMS TO DEVELOP IN AND CLOSE TO
THE WATCH AREA.

HAVE A SAFE SHELTER NEARBY.  LISTEN FOR POSSIBLE WARNINGS AND BE
READY TO MOVE TO SAFE SHELTER IF THREATENING WEATHER APPROACHES.

STAY UPDATED WITH THE LATEST FORECASTS FROM NOAA WEATHER RADIO OR
YOUR FAVORITE RADIO...TV OR CABLE TV STATION.

DUNHAM
Special weather statement, May 6, 9:38 AM EDT, 17 minutes before
PAZ012-025>028-033>036-041-042-045-046-049>053-056>059-063>066-06
1800-
SPECIAL WEATHER STATEMENT   CORRECTED FOR DATE
NATIONAL WEATHER SERVICE STATE COLLEGE PA
932 AM EDT TUE MAY 6 1997

...THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM
WATCH FOR THE FOLLOWING COUNTIES...

...SOMERSET...BEDFORD...BLAIR...FRANKLIN...FULTON...HUNTINGDON...
JUNIATA...MIFFLIN...

LYCOMING...SULLIVAN...COLUMBIA...MONTOUR...NORTHUMBERLAND....
PERRY...SCHUYLKILL...SNYDER...UNION...

ADAMS...CUMBERLAND...DAUPHIN...LANCASTER...LEBANON...
YORK...

REMEMBER...A SEVERE THUNDERSTORM WATCH MEANS THAT CONDITIONS ARE
FAVORABLE FOR DAMAGING THUNDERSTORMS TO DEVELOP IN AND CLOSE TO
THE WATCH AREA.

HAVE A SAFE SHELTER NEARBY.  LISTEN FOR POSSIBLE WARNINGS AND BE
READY TO MOVE TO SAFE SHELTER IF THREATENING WEATHER APPROACHES.

STAY UPDATED WITH THE LATEST FORECASTS FROM NOAA WEATHER RADIO OR
YOUR FAVORITE RADIO...TV OR CABLE TV STATION.

DUNHAM

The office that day

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

IssuedProductOfficeCountiesLasted
May 6, 9:59 AM EDTSevere Thunderstorm WarningCTPSnyder31 min
May 6, 10:08 AM EDTSevere Thunderstorm WarningCTPMontour, Northumberland52 min
May 6, 10:08 AM EDTSevere Thunderstorm WarningCTPSullivan52 min
May 6, 10:18 AM EDTSevere Thunderstorm WarningCTPDauphin, Schuylkill57 min
May 6, 10:28 AM EDTSevere Thunderstorm WarningCTPCumberland, Perry62 min
May 6, 11:23 AM EDTSevere Thunderstorm WarningCTPLancaster67 min

Nearby

Severe Thunderstorm Warnings in Pennsylvania, 1997Every severe thunderstorm warning in 1997

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.