Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2000

Severe Thunderstorm Warning 40, NWS State College, PA

May 10, 2000Lancaster County, Pennsylvania

NWS State College, PA issued this severe thunderstorm warning at May 10, 2000, 3:56 PM EDT for Lancaster County, Pennsylvania. It was in force for 64 min. 4 reports 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 10, 2000, 3:56 PM EDT (19:56 UTC)
Expired: May 10, 2000, 5:00 PM EDT
In force: 64 min
Issued by: NWS State College, PA
Area: Whole counties

County Lancaster County, PA

What was reported inside it

Time	Report	Where	Remark
May 10, 4:15 PM EDT	Thunderstorm Wind	Quarryville, PA	Power lines down.
May 10, 4:29 PM EDT	Hail 1.75	Lancaster, PA	Large hail closed down roads in the Lancaster area.
May 10, 4:45 PM EDT	Tornado F0	Strasburg, PA	A small F0 tornado touched down at about 4:45 pm EDT in Lancaster County, south of Millersville, and west of Salisbury in Manor Township. The storm moved east along an intermittent path through West Lampeter Township, ending west of Strasburg. Two tobacco ba
May 10, 4:45 PM EDT	Hail 1.75	Millersville, PA

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.

Issued	Product	Office	Lasted
May 10, 11:15 AM EDT	Severe Thunderstorm Watch	SPC	6 hr

The nearest sounding before it

Phillips Aaf/Abe, MD (KAPG), launched 12:00Z, 7.9 hours before the alert went out and 65 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: 786 J/kg
Mixed-layer CIN: -165 J/kg
Mixed-layer LCL: 1290 m above ground
0-6 km bulk shear: 24 kt
0-1 km storm-relative helicity: -75 m²/s²
0-3 km storm-relative helicity: 2 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.2

Open this sounding in Storm Lab

The text

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

000 
WUUS51 KCTP 101958
SVRCTP
PAC071-102100-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE STATE COLLEGE PA
356 PM EDT WED MAY 10 2000

THE NATIONAL WEATHER SERVICE IN STATE COLLEGE PA HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  LANCASTER COUNTY.

* UNTIL 500 PM EDT.

* AT 350 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM ALONG A LINE EXTENDING FROM 6 MILES SOUTH OF
  MIDDLETOWN TO STONYBROOK-WILSHIRE TO 4 MILES EAST OF WESTMINSTER...
  MOVING EAST AT 30 MPH.

* SEVERE THUNDERSTORMS WILL BE NEAR...
  MARIETTA AT 400 PM EDT.
  COLUMBIA...RHEEMS AT 405 PM EDT.
  MOUNT JOY AT 410 PM EDT.
  MOUNTVILLE...SALUNGA-LANDISVILLE AT 415 PM EDT.
  EAST PETERSBURG...MANHEIM AT 425 PM EDT.
  LANCASTER...LITITZ AT 430 PM EDT.

THIS IS A DANGEROUS STORM. STAY INDOORS AWAY FROM WINDOWS.

HAIL UP TO THREE QUARTERS OF AN INCH IN DIAMETER HAS BEEN REPORTED 
IN SOUTH YORK EAST OF INTERSTATE 83 WITH THIS STORM. IF YOU ARE IN THE 
PATH OF THE STORM...PUT YOUR CAR IN A GARAGE AND MOVE TO A 
SUBSTANTIAL SHELTER.

.END/ GRUMM

&

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 10, 3:15 PM EDT, 41 minutes earlier.

Area forecast discussion, May 10, 3:15 PM EDT, 41 minutes before

CENTRAL PENNSYLVANIA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE STATE COLLEGE PA
315 PM EDT WED MAY 10 2000

SVR TSTM OUTBREAK UNDERWAY ACROSS OUR CWA. LOTS OF REPORTS OF LARGE
HAIL AND A FEW FUNNEL CLD REPORTS BUT JUST A FEW GUSTS TO 30 KTS
HERE AND THERE. THERE IS ACTUALLY STRONGER WINDS BEHIND THE FRONT IN
THE PIT AREA. THE FRONT IS APPROACHING THE ALLEGHENIES AT 16Z AND
THIS LINES UP WELL WITH THIS AM'S THINKING. THIS MEANS THIS EVENT
SHUD BE OVR IN OUR CWA BY 22Z. THE SVR TSTM WATCH GOES UNTIL 21Z AND
THIS LOOKS PRETTY GOOD...ALTHO IT MAY NEED TO BE EXTENDED OVR E PA
OVR LANCASTER LEBANON AND SCHYLKILL COUNTIES. THIS WILL RESULT IN A
NECESSARY UPDATE EARLY THIS EVENING.

GUSTY WINDS WILL FOLLOW THE FRONT FOR SEVERAL HOURS THIS EVENING AND
WITH THE SVR TSTM WATCH STILL IN EFFECT FOR OUR EASTERN COUNTIES I
ADDED AN EVENING PERIOD. WILL DROP THE WATCH WEST OF A WELLSBORO TO
UNV TO FULTON COUNTY LINE INCLUDING FULTON COUNTY.

SKY WILL CLEAR QUICKLY E OF THE MTNS THIS EVE AND MORE SLOWLY OVR
THE NW AND IN THE MTNS...WHERE WRAPAROUND CLDS ARE MOVG IN.

SKY SHUD BE CLR FROM MIDNT TONITE UNTIL NOON THU. THEN ANOTHER FAST
MOVG SYSTEM WILL MOVE INTO THE AREA. THIS NEXT SYSTEM WILL BE
MOISTURE STARVED BUT WAA LATE THU NITE INTO FRI MAY GENERATE A FEW
HI BASED SHRAS. AGREE WITH LOW MOS POPS. FOLLOWED MOS TEMPS CLOSELY
AS WELL.

.CTP...SVR TSTM WATCH TIL 5 PM FOR SUSQ VAL COUNTIES.

HEAD

In the hours before

Special weather statement, May 10, 11:20 AM EDT, 4 hours 36 minutes before

PAZ005-006-010>012-017>019-024>028-033>037-041-045-046-049>053-
056>059-063>066-102100-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE STATE COLLEGE PA
1120 AM EDT WED MAY 10 2000

A SEVERE THUNDERSTORM WATCH IS IN EFFECT UNTIL 500 PM THIS AFTERNOON
FOR THE FOLLOWING COUNTIES IN CENTRAL PENNSYLVANIA...

ADAMS...BEDFORD...BLAIR...CAMBRIA...CAMERON...CENTRE...CLEARFIELD...
CLINTON...COLUMBIA...CUMBERLAND...DAUPHIN...ELK...FRANKLIN...
FULTON...HUNTINGDON...JUNIATA...LANCASTER...LEBANON...LYCOMING...
MCKEAN...MIFFLIN...MONTOUR...NORTHUMBERLAND...PERRY...POTTER...
SCHUYLKILL...SNYDER ...SOMERSET...SULLIVAN...TIOGA...UNION...YORK.

REMEMBER...A SEVERE THUNDERSTORM WATCH MEANS CONDITIONS ARE
FAVORABLE FOR SEVERE THUNDERSTORMS IN AND CLOSE TO THE WATCH AREA.
PERSONS IN THESE AREAS SHOULD BE ON THE LOOKOUT FOR THREATENING
WEATHER CONDITIONS AND LISTEN FOR LATER STATEMENTS AND POSSIBLE
WARNINGS.

.END/RXR

Local storm report, May 10, 11:58 AM EDT, 3 hours 58 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE STATE COLLEGE, PA
1055 AM EDT WED MAY 10 2000

TIME(EDT)  .....CITY LOCATION.....STATE   ...EVENT/REMARKS...
           ....COUNTY LOCATION....

1015 AM    1.5 N WARRENSVILLE        PA   1.00 INCH HAIL
05/10/00   LYCOMING

1030 AM    MIDDLE PAXTON BORO        PA   .75 INCH HAIL
05/10/00   DAUPHIN

1151 AM    PORT ALLEGHENY      }      PA   .88 INCH HAIL
05/10/00   MCKEAN

1155 AM    2 N PORT ALLEGHENY        PA   1.00 INCH HAIL
05/10/00   MCKEAN

DJO

Local storm report, May 10, 1:07 PM EDT, 2 hours 49 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE STATE COLLEGE, PA
1055 AM EDT WED MAY 10 2000

TIME(EDT)  .....CITY LOCATION.....STATE   ...EVENT/REMARKS...
           ....COUNTY LOCATION....

1015 AM    1.5 N WARRENSVILLE        PA   1.00 INCH HAIL
05/10/00   LYCOMING

1030 AM    MIDDLE PAXTON BORO        PA   .75 INCH HAIL
05/10/00   DAUPHIN

1151 AM    PORT ALLEGHENY            PA   .88 INCH HAIL
05/10/00   MCKEAN

1155 AM    2 N PORT ALLEGHENY        PA   1.00 INCH HAIL
05/10/00   MCKEAN

1151 AM    PORT ALLEGHENY            PA   1.00 INCH HAIL
05/10/00   MCKEAN

1210 PM    EMPORIUM                  PA   1.00 INCH HAIL
05/10/00   CAMERON

1210 PM    NORTH BENTON              PA   1.00 INCH HAIL
05/10/00   COLUMBIA

1235 PM    HEGINS                    PA   .75 INCH HAIL
05/10/00   SCHUYLKILL

1120 PM    MARYSVILLE                PA   1.75 INCH HAIL
05/10/00   PERRY

DJO

Local storm report, May 10, 2:49 PM EDT, 1 hour 7 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE STATE COLLEGE, PA
1055 AM EDT WED MAY 10 2000

TIME(EDT)  .....CITY LOCATION.....STATE   ...EVENT/REMARKS...
           ....COUNTY LOCATION....

1015 AM    1.5 N WARRENSVILLE        PA   1.00 INCH HAIL
05/10/00   LYCOMING

1030 AM    MIDDLE PAXTON BORO        PA   .75 INCH HAIL
05/10/00   DAUPHIN

1151 AM    PORT ALLEGHENY            PA   .88 INCH HAIL
05/10/00   MCKEAN

1155 AM    2 N PORT ALLEGHENY        PA   1.00 INCH HAIL
05/10/00   MCKEAN

1151 AM    PORT ALLEGHENY            PA   1.00 INCH HAIL
05/10/00   MCKEAN

1210 PM    EMPORIUM                  PA   1.00 INCH HAIL
05/10/00   CAMERON

1210 PM    NORTH BENTON              PA   1.00 INCH HAIL
05/10/00   COLUMBIA

1235 PM    HEGINS                    PA   .75 INCH HAIL
05/10/00   SCHUYLKILL

1120 PM    MARYSVILLE                PA   1.75 INCH HAIL
05/10/00   PERRY

0145 PM    MILL HALL                 PA   1.00 INCH HAIL
05/10/00   CLINTON

0151 PM    HALIFAX                   PA   1.75 INCH HAIL
05/10/00   DAUPHIN

1247 PM    WESTFIELD                 PA   WIND DAMAGE
05/10/00   TIOGA                          TREES DOWN

105 PM    KNOXVILLE                 PA   WIND DAMAGE
05/10/00   TIOGA                          TREES DOWN

105 PM    ROSEVILLE                 PA   WIND DAMAGE
05/10/00   TIOGA                          POWER LINES DOWN

0205 PM    LIBERTY                   PA   .88 INCH HAIL
05/10/00   TIOGA

DJO

Special weather statement, May 10, 3:00 PM EDT, 56 minutes before

PAZ005-006-010>012-017>019-024>028-033>037-041-045-046-049>053-
056>059-063>066-102100-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE STATE COLLEGE PA
300 PM EDT WED MAY 10 2000

THE SEVERE THUNDERSTORM WATCH HAS BEEN CANCELLED FOR THE FOLLOWING
COUNTIES IN CENTRAL PENNSYLVANIA...

BEDFORD...BLAIR...CAMBRIA...CAMERON...CENTRE...CLEARFIELD...
CLINTON...ELK...FULTON...HUNTINGDON...MCKEAN...POTTER...
SOMERSET...AND TIOGA.

A COOLER AND MORE STABLE AIRMASS HAS MOVED INTO THE WESTERN
MOUNTAINS...ENDING THE THREAT OF SEVERE THUNDERSTORMS.  THERE WILL
BE A CHANCE OF SHOWERS THROUGH THE AFTERNOON HOURS...BUT SEVERE
THUNDERSTORMS ARE NO LONGER EXPECTED.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 500 PM THIS
AFTERNOON FOR THE SUSQUEHANNA VALLEY AND MUCH OF THE CENTRAL
MOUNTAINS...INCLUDING THE FOLLOWING COUNTIES IN CENTRAL
PENNSYLVANIA...

ADAMS...COLUMBIA...CUMBERLAND...DAUPHIN...FRANKLIN...JUNIATA...
LANCASTER...LEBANON...LYCOMING...MIFFLIN...MONTOUR...
NORTHUMBERLAND...PERRY...SCHUYLKILL...SNYDER...SULLIVAN...
UNION...AND YORK.

SEVERE THUNDERSTORMS PRODUCE LARGE DAMAGING HAIL 3/4 OF AN INCH IN
DIAMETER OR LARGER...DAMAGING THUNDERSTORM WINDS OF 58 MPH OR
GREATER AND DANGEROUS CLOUD TO GROUND LIGHTNING.

REMEMBER...A SEVERE THUNDERSTORM WATCH MEANS CONDITIONS ARE
FAVORABLE FOR SEVERE THUNDERSTORMS IN AND CLOSE TO THE WATCH AREA.
PERSONS IN THESE AREAS pSHOULD BE ON THE LOOKOUT FOR THREATENING
WEATHER CONDITIONS AND LISTEN FOR LATER STATEMENTS AND POSSIBLE
WARNINGS.

.END/RXR

Local storm report, May 10, 3:11 PM EDT, 45 minutes before

PHLLSRCTP
TTAAOO KCTP 101848

PRELIMINARY LOCAL STORM REPORT...CORRECTED FOR ISSUANCE TIME
NATIONAL WEATHER SERVICE STATE COLLEGE, PA
311 PM EDT WED MAY 10 2000

TIME(EDT)  .....CITY LOCATION.....STATE   ...EVENT/REMARKS...
           ....COUNTY LOCATION....

1015 AM    1.5 N WARRENSVILLE        PA   1.00 INCH HAIL
05/10/00   LYCOMING

1030 AM    MIDDLE PAXTON BORO        PA   .75 INCH HAIL
05/10/00   DAUPHIN

1151 AM    PORT ALLEGHENY            PA   .88 INCH HAIL
05/10/00   MCKEAN

1155 AM    2 N PORT ALLEGHENY        PA   1.00 INCH HAIL
05/10/00   MCKEAN

1151 AM    PORT ALLEGHENY            PA   1.00 INCH HAIL
05/10/00   MCKEAN

1210 PM    EMPORIUM                  PA   1.00 INCH HAIL
05/10/00   CAMERON

1210 PM    NORTH BENTON              PA   1.00 INCH HAIL
05/10/00   COLUMBIA

1235 PM    HEGINS                    PA   .75 INCH HAIL
05/10/00   SCHUYLKILL

1120 PM    MARYSVILLE                PA   1.75 INCH HAIL
05/10/00   PERRY

0145 PM    MILL HALL                 PA   1.00 INCH HAIL
05/10/00   CLINTON

0151 PM    HALIFAX                   PA   1.75 INCH HAIL
05/10/00   DAUPHIN

1247 PM    WESTFIELD                 PA   WIND DAMAGE
05/10/00   TIOGA                          TREES DOWN

105 PM    KNOXVILLE                  PA   WIND DAMAGE
05/10/00  TIOGA                           TREES DOWN

105 PM    ROSEVILLE                  PA   WIND DAMAGE
05/10/00  TIOGA                           POWER LINES DOWN

0205 PM    LIBERTY                   PA   .88 INCH HAIL
05/10/00   TIOGA

DJO

The office that day

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

Issued	Product	Office	Counties	Lasted
May 10, 4:33 AM EDT	Severe Thunderstorm Warning	CTP	Elk	57 min
May 10, 5:54 AM EDT	Severe Thunderstorm Warning	CTP	McKean	36 min
May 10, 10:09 AM EDT	Severe Thunderstorm Warning	CTP	Lycoming	51 min
May 10, 10:26 AM EDT	Severe Thunderstorm Warning	CTP	Sullivan	64 min
May 10, 10:52 AM EDT	Severe Thunderstorm Warning	CTP	Elk	53 min
May 10, 11:10 AM EDT	Severe Thunderstorm Warning	CTP	Cumberland, Dauphin, Perry	65 min
May 10, 11:17 AM EDT	Severe Thunderstorm Warning	CTP	Clearfield	58 min
May 10, 11:28 AM EDT	Severe Thunderstorm Warning	CTP	McKean	62 min
May 10, 11:41 AM EDT	Severe Thunderstorm Warning	CTP	Cameron, Elk	49 min
May 10, 11:42 AM EDT	Tornado Warning	CTP	Dauphin	33 min
May 10, 11:48 AM EDT	Severe Thunderstorm Warning	CTP	York	57 min
May 10, 12:05 PM EDT	Severe Thunderstorm Warning	CTP	Lebanon, Schuylkill	55 min
May 10, 12:14 PM EDT	Severe Thunderstorm Warning	CTP	Cameron, Clearfield	46 min
May 10, 12:19 PM EDT	Severe Thunderstorm Warning	CTP	Columbia	56 min
May 10, 12:28 PM EDT	Severe Thunderstorm Warning	CTP	Blair	62 min
May 10, 12:32 PM EDT	Severe Thunderstorm Warning	CTP	Bedford, Somerset	58 min
May 10, 12:40 PM EDT	Severe Thunderstorm Warning	CTP	Centre, Clinton	65 min
May 10, 12:49 PM EDT	Severe Thunderstorm Warning	CTP	Tioga	71 min
May 10, 12:58 PM EDT	Severe Thunderstorm Warning	CTP	Dauphin, Perry	62 min
May 10, 1:05 PM EDT	Severe Thunderstorm Warning	CTP	Schuylkill	70 min
May 10, 1:09 PM EDT	Severe Thunderstorm Warning	CTP	Cumberland, Franklin	66 min
May 10, 1:18 PM EDT	Severe Thunderstorm Warning	CTP	Huntingdon	57 min
May 10, 1:40 PM EDT	Severe Thunderstorm Warning	CTP	Northumberland	65 min
May 10, 1:45 PM EDT	Severe Thunderstorm Warning	CTP	Clinton	45 min
May 10, 1:58 PM EDT	Severe Thunderstorm Warning	CTP	Dauphin, Northumberland	62 min
May 10, 2:12 PM EDT	Severe Thunderstorm Warning	CTP	Lycoming	63 min
May 10, 2:17 PM EDT	Severe Thunderstorm Warning	CTP	Columbia, Schuylkill	58 min
May 10, 2:45 PM EDT	Severe Thunderstorm Warning	CTP	Adams, Franklin	60 min
May 10, 2:51 PM EDT	Severe Thunderstorm Warning	CTP	Sullivan	39 min
May 10, 3:07 PM EDT	Severe Thunderstorm Warning	CTP	Columbia, Northumberland	68 min
May 10, 3:19 PM EDT	Severe Thunderstorm Warning	CTP	Dauphin, York	86 min
May 10, 4:27 PM EDT	Tornado Warning	CTP	Lancaster	48 min

Nearby

Severe Thunderstorm Warnings in Pennsylvania, 2000 Every severe thunderstorm 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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive.