Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2001

Severe Thunderstorm Warning 131, NWS State College, PA

July 11, 2001Cameron County, Pennsylvania

NWS State College, PA issued this severe thunderstorm warning at Jul 11, 2001, 12:24 AM EDT for Cameron County, Pennsylvania. It was in force for 51 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: Jul 11, 2001, 12:24 AM EDT (04:24 UTC)
Expired: Jul 11, 2001, 1:15 AM EDT
In force: 51 min
Issued by: NWS State College, PA
Area: Whole counties

County Cameron County, PA

The nearest sounding before it

Buffalo Intl Airport, NY (KBUF), launched 00:00Z, 4.4 hours before the alert went out and 171 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: 686 J/kg
Mixed-layer CIN: -31 J/kg
Mixed-layer LCL: 1415 m above ground
0-6 km bulk shear: 64 kt
0-1 km storm-relative helicity: -39 m²/s²
0-3 km storm-relative helicity: 39 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.8

Open this sounding in Storm Lab

The text

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

000 
WUUS51 KCTP 110424
SVRCTP

PAC023-110515-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE STATE COLLEGE PA
1224 AM EDT WED JUL 11 2001

THE NATIONAL WEATHER SERVICE IN STATE COLLEGE PA HAS ISSUED A

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

* UNTIL 115 AM EDT.

* AT 1216 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM 8 MILES NORTHWEST OF ELK RIVER...OR 12 MILES
  NORTHEAST OF JOHNSONBURG...MOVING SOUTHEAST AT 45 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  EMPORIUM AT 1240 AM.
  CAMERON AT 1245 AM.
  STEVENSON DAM AT 1250 AM.

THIS IS A DANGEROUS STORM. STAY INDOORS AWAY FROM WmINDOWS. SEVERE
THUNDERSTORMS CONTAIN DAMAGING WINDS 58 MPH OR STRONGER OR HAIL THREE
QUARTERS OF AN INCH OR LARGER.

$$

LAT...LON 4167 7851 4160 7855 4135 7813 4150 7800

MSE

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 Jul 10, 8:35 PM EDT, 3 hours 49 minutes earlier.

Area forecast discussion, Jul 10, 8:35 PM EDT, 3 hours 49 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE STATE COLLEGE PA
835 PM EDT TUE JUL 10 2001

COLD FRONT SLIDING SOUTH TO NEAR INTERSTATE 80...WILL CLEAR THE
MASON/DIXON LINE SHORTLY AFTER MIDNIGHT. ISOLATED TSRA ACROSS THE
CENTRAL MTNS AND SE ZONES AT PRESENT...WILL GRADUALLY WEAKEN DURING
THE NEXT HOUR OR SO. HOWEVER...ANOTHER UPPER SPEED MAX RACING SE
ACROSS LAKE ERIE MAY REGENERATE A FEW MORE SHRA/TSRA ALONG THE FRONT
THROUGH LATE THIS EVENING.

A MUCH LESS HUMID AND RATHER BREEZY DAY IS IN STORE FOR WED. MID LVL
THERMAL TROUGH CROSSING THE STATE ON WEDNESDAY SHOULD KICK OFF
WIDELY SCATTERED SHRA OR TSRA DURING THE AFTERNOON HOURS. MID SHIFT
MAY WANT TO NARROW DOWN THE AREA OF THIS CONVECTION MORE TWD THE NE
ZONES...WHERE COOLEST MID LVL TEMPS WILL BE LOCATED.

.CTP...NONE.

LAMBERT

In the hours before

Local storm report, Jul 10, 11:54 PM EDT, 30 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE STATE COLLEGE, PA
1154 PM EDT TUE JUL 10 2001

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

0228 PM    POTTSVILLE                PA   WIND DAMAGE
07/10/01   SCHUYLKILL                     TREES AND POWER
                                          LINES BLOWN DOWN

0230 PM    12 N HUNTINGDON           PA   1.75 INCH HAIL
07/10/01   HUNTINGDON

0239 PM    2 N CAMP HILL             PA   0.88 INCH HAIL
07/10/01   CUMBERLAND

0301 PM    CORNWALL                  PA   WIND DAMAGE
07/10/01   LEBANON                        TREES AND POWER
                                          LINES DOWN

0307 PM    HARRISBURG                PA   WIND DAMAGE
07/10/01   DAUPHIN                        NUMEROUS TREES
                                          AND POWER LINES
                                          KNOCKED DOWN

0310 PM    2 NE YORK                 PA   WIND DAMAGE
07/10/01   YORK                           TREES DOWN
                                          BLOCKING ROADS

0349 PM    JOHNSTOWN                 PA   WIND DAMAGE
07/10/01   CAMBRIA                        NUMEROUS TREES
                                          BLOWN DOWN

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 10, 8:09 PM EDT	Severe Thunderstorm Warning	CTP	Lancaster	51 min
Jul 10, 11:48 PM EDT	Severe Thunderstorm Warning	CTP	McKean	57 min
Jul 11, 2:15 AM EDT	Severe Thunderstorm Warning	CTP	Elk	45 min
Jul 11, 2:59 AM EDT	Tornado Warning	CTP	Clearfield, Elk	31 min
Jul 11, 3:36 AM EDT	Severe Thunderstorm Warning	CTP	Centre	54 min
Jul 11, 3:45 AM EDT	Severe Thunderstorm Warning	CTP	Lycoming	45 min
Jul 11, 4:08 AM EDT	Severe Thunderstorm Warning	CTP	Columbia, Montour, Northumberland	67 min
Jul 11, 4:08 AM EDT	Severe Thunderstorm Warning	CTP	Union	67 min
Jul 11, 5:00 AM EDT	Tornado Warning	CTP	Snyder, Union	30 min
Jul 11, 5:22 AM EDT	Tornado Warning	CTP	Northumberland	23 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; the sounding from the Mesonet's radiosonde archive.