Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2001

Severe Thunderstorm Warning 67, NWS State College, PA

June 20, 2001Montour County, Pennsylvania

NWS State College, PA issued this severe thunderstorm warning at Jun 20, 2001, 7:40 PM EDT for Montour County, Pennsylvania. It was in force for 20 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: Jun 20, 2001, 7:40 PM EDT (23:40 UTC)
Expired: Jun 20, 2001, 8:00 PM EDT
In force: 20 min
Issued by: NWS State College, PA
Area: Whole counties

County Montour County, PA

What was reported inside it

Time	Report	Where	Remark
Jun 20, 7:45 PM EDT	Thunderstorm Wind	Washingtonville, PA	An 80-foot by 120-foot crop production facility was destroyed in Washingtonville by straight line winds estimated to be 80 mph. Debris from the building was found one-half mile away. Numerous trees were also reported down in the area.

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 nearest sounding before it

Phillips Aaf/Abe, MD (KAPG), launched 12:00Z, 11.7 hours before the alert went out and 180 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: 483 J/kg
Mixed-layer CIN: -208 J/kg
Mixed-layer LCL: 991 m above ground
0-6 km bulk shear: 19 kt
0-1 km storm-relative helicity: 59 m²/s²
0-3 km storm-relative helicity: 100 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 
WUUS51 KCTP 202340
SVRCTP
PAC093-210000-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE STATE COLLEGE PA
740 PM EDT WED JUN 20 2001

THE NATIONAL WEATHER SERVICE IN STATE COLLEGE PA HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  MONTOUR COUNTY IN PENNSYLVANIA

* UNTIL 800 PM EDT.

* AT 738 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM 10 MILES NORTH OF DANVILLE...MOVING SOUTHEAST
  AT 30 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  MECHANICSVILLE AND DANVILLE AT 755 PM.

SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND IN EXCESS OF 55 
MPH...DESTRUCTIVE HAIL...FREQUENT LIGHTNING...AND VERY HEAVY RAIN. 
AFOR YOUR PROTECTION...MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR 
OF YOUR HOME OR BUSINESS. HEAVY RAIN FLOODS ROADS QUICKLY SO DON'T 
DRIVE INTO AREAS WHERE WATER COVERS THE ROAD.

$$

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 Jun 20, 6:20 PM EDT, 1 hour 20 minutes earlier.

Area forecast discussion, Jun 20, 6:20 PM EDT, 1 hour 20 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE STATE COLLEGE PA
620 PM EDT WED JUN 20 2001

...UPDATED...

SENT OUT UPDATE TO ELIMINATE WATCH 456 HEADLINES. JUST TWEAKED
WORDING TO REFLECT CURRENT RADAR/SATELLITE LOOP.

....ROUTINE DISCUSSION FROM THIS AFTERNOON...

JUST GETTING SETTLED IN THE CHAIR AS ALL HANDS BUSY W/SVR WX.
CONFIRMATION ON A FEW CELLS ABV SVR LIMITS ALREADY AND CONDITIONS
CONTINUE TO BE RIPE. CAPES HIGH...BOUNDARIES A-PLENTY. SOME CELLS HV
DECENT ROTATION AND LG HAIL POSS AS THERMO PROFILE FAVORABLE.

IMMEDIATE CONCERNS FOR SVR TSTMS WL LAST INTO THE EVENING...BUT NOT
MUCH PAST DARK...EVEN IN THE LWR SUSQ. AGAIN...BOUNDARIES WL
STAY PLENTIFUL THROUGH THE NIGHT AND INTO DAY THU. THU PROMISES MORE
OF THE SAME...AS WE ARE WARM-SECTORED. DIURNAL MAX OF THUNDER TO
TAKE PLACE AGAIN TOMORROW...BUT SOME OVERRUNNING RAFL POSSIBLE AS
WAVE DEVELOPS ALONG THE RELATIVELY STATIONARY BNDRY AND RIDES THRU
PA. FRI HOLDS THE MAJOR PUSH OF THE UPR TROF DROPPING OUT OF GLS.
THUS...LIKLIHOOD OF PRECIP REMAINS. TEMPS TO FOLLOW MOS GUID XCPT
FOR A WARMER DAY TMRW FOR MOST ZNS.

XTNDD: LINGERING TROF/DYNAMICS AND MSTR MAY PRODUCE SHRA ON SATURDAY
AND SUNDAY ACROSS OUR ERN/NRN FA. THEN...IF UPR TROF CUTS OFF OV
APPS AS LATEST AVN/OTHER MED RANGE GUID SUGGS...WE MIGHT STAY COOL
AND MOIST THRU WED - AS CUTOFFS HAVE THIS NASTY TENDENCY TO BE
STATIC AND MAKE CLDS AND PRECIP3. WL START TO PLAY IT MORE ON THE WET
AND COOL SIDE OF THE FENCE. WL GO COOLER THAN MRF GUID IN LAST 4
PDS.

.CTP...NONE.

JUNG

In the hours before

Local storm report, Jun 20, 2:00 PM EDT, 5 hours 40 minutes before

PHLWRKLSR
TTAAOO KCTP 201800

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE STATE COLLEGE, PA
200 PM EDT WED JUN 20 2001

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

0130 PM    MANSFIELD                 PA   WIND DAMAGE
06/20/01   TIOGA                          TREE AND TREE LIMBS DOWN
                                          BLOCKING RTE 15 NEAR EDDY'S
                                          RESTAURANT. RICHMOND TWP

Local storm report, Jun 20, 4:07 PM EDT, 3 hours 33 minutes before

PHLWRKLSR
TTAAOO KCTP 202007

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE STATE COLLEGE, PA
407 PM EDT WED JUN 20 2001

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

0130 PM    MANSFIELD                 PA   WIND DAMAGE
06/20/01   TIOGA                          TREE AND TREE LIMBS DOWN
                                          BLOCKING RTE 15 NEAR EDDYS
                                          RESTAURANT. RICHMOND
                                          TOWNSHIP.

0145 PM    JERSEY SHORE              PA   WIND DAMAGE
06/20/01   LYCOMING                       SIDING AND CHIMNEY OFF
                                          HOME.

0250 PM    MUNCY                     PA   WIND DAMAGE
06/20/01   LYCOMING                       SHINGLES BLOWN OFF HOUSE.

0315 PM    MILLVILLE                 PA   1.00 INCH HAIL
06/20/01   COLUMBIA

0326 PM    KNOBSVILLE                PA   WIND DAMAGE
06/20/01   FULTON                         LARGE TREE LIMBS DOWN.

Local storm report, Jun 20, 7:20 PM EDT, 20 minutes before

PHLWRKLSR
TTAAOO KCTP 202320

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE STATE COLLEGE, PA
720 PM EDT WED JUN 20 2001

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

0130 PM    MANSFIELD                 PA   WIND DAMAGE
06/20/01   TIOGA                          TREE AND TREE LIMBS DOWN
                                          BLOCKING RTE 15 NEAR EDDY'S
                                          RESTAURANT. RICHMOND
                                          TOWNSHIP.

0145 PM    JERSEY SHORE              PA   WIND DAMAGE
06/20/01   LYCOMING                       SIDING AND CHIMNEY OFF
                                          HOME.

0250 PM    MUNCY                     PA   WIND DAMAGE
06/20/01   LYCOMING                       SHINGLES BLOWN OFF HOUSE.

0315 PM    MILLVILLE                 PA   1.00 INCH HAIL
06/20/01   COLUMBIA

0326 PM    KNOBSVILLE                PA   WIND DAMAGE
06/20/01   FULTON                         LARGE TREE LIMBS DOWN.

0405 PM    HARRISBURG                PA   WIND DAMAGE
06/20/01   DAUPHIN                        NUMEROUS REPORTS OF
                                          TREES AND WIRES DOWN.

0415 PM    CHAMBERSBURG              PA   WIND DAMAGE
06/20/01   FRANKLIN                       TREES DOWN.

0440 PM    POTTSVILLE                PA   WIND DAMAGE
06/20/01   SCHUYLKILL                     TREES DOWN.

0447 PM    SHIREMANSTOWN             PA   81 MPH TSTM WIND GUST
06/20/01   CUMBERLAND

0459 PM    STEELTON                  PA   WIND DAMAGE
06/20/01   DAUP@HIN                        TREES DOWN ON NORTH FRONT
                                          STREET.

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 20, 12:49 PM EDT	Severe Thunderstorm Warning	CTP	Tioga	56 min
Jun 20, 1:02 PM EDT	Severe Thunderstorm Warning	CTP	Clinton, Lycoming	73 min
Jun 20, 2:36 PM EDT	Severe Thunderstorm Warning	CTP	Juniata	54 min
Jun 20, 2:43 PM EDT	Severe Thunderstorm Warning	CTP	Lycoming, Montour, Northumberland, Union	62 min
Jun 20, 3:02 PM EDT	Severe Thunderstorm Warning	CTP	Fulton	58 min
Jun 20, 3:09 PM EDT	Severe Thunderstorm Warning	CTP	Columbia	81 min
Jun 20, 3:27 PM EDT	Severe Thunderstorm Warning	CTP	Franklin	63 min
Jun 20, 3:40 PM EDT	Severe Thunderstorm Warning	CTP	Dauphin, Perry	65 min
Jun 20, 4:15 PM EDT	Severe Thunderstorm Warning	CTP	Schuylkill	60 min
Jun 20, 4:28 PM EDT	Severe Thunderstorm Warning	CTP	Franklin	62 min
Jun 20, 4:35 PM EDT	Severe Thunderstorm Warning	CTP	Lebanon	55 min
Jun 20, 4:38 PM EDT	Severe Thunderstorm Warning	CTP	Tioga	67 min
Jun 20, 4:45 PM EDT	Severe Thunderstorm Warning	CTP	Cumberland	15 min
Jun 20, 4:48 PM EDT	Tornado Warning	CTP	Tioga	27 min
Jun 20, 4:49 PM EDT	Severe Thunderstorm Warning	CTP	York	71 min
Jun 20, 4:53 PM EDT	Severe Thunderstorm Warning	CTP	Dauphin	37 min
Jun 20, 4:56 PM EDT	Severe Thunderstorm Warning	CTP	McKean	64 min
Jun 20, 5:29 PM EDT	Severe Thunderstorm Warning	CTP	Lancaster	76 min
Jun 20, 5:54 PM EDT	Severe Thunderstorm Warning	CTP	Lycoming	66 min
Jun 20, 7:00 PM EDT	Severe Thunderstorm Warning	CTP	Lycoming	45 min
Jun 20, 7:54 PM EDT	Severe Thunderstorm Warning	CTP	Elk	36 min

Nearby

Severe Thunderstorm Warnings in Pennsylvania, 2001 Every severe thunderstorm warning in 2001

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.