Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2001

Severe Thunderstorm Warning 71, NWS State College, PA

June 21, 2001Elk County, Pennsylvania

NWS State College, PA issued this severe thunderstorm warning at Jun 21, 2001, 10:32 PM EDT for Elk County, Pennsylvania. It was in force for 58 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: Jun 21, 2001, 10:32 PM EDT (02:32 UTC)
Expired: Jun 21, 2001, 11:30 PM EDT
In force: 58 min
Issued by: NWS State College, PA
Area: Whole counties

County Elk County, PA

The nearest sounding before it

Pittsburgh, PA (KPIT), launched 00:00Z, 2.5 hours before the alert went out and 166 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: 661 J/kg
Mixed-layer CIN: -15 J/kg
Mixed-layer LCL: 1212 m above ground
0-6 km bulk shear: 19 kt
0-1 km storm-relative helicity: 72 m²/s²
0-3 km storm-relative helicity: 128 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.9

Open this sounding in Storm Lab

The text

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

000 
WUUS51 KCTP 220232
SVRCTP
PAC047-220330-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE STATE COLLEGE PA
1032 PM EDT THU JUN 21 2001

THE NATIONAL WEATHER SERVICE IN STATE COLLEGE PA HAS ISSUED A

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

* UNTIL 1130 PM EDT.

* AT 1028 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM 16 MILES WEST OF RIDGWAY...MOVING EAST AT 30
  MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  RIDGWAY AT 1055 PM.
  JOHNSONBURG AT 1100 PM.
  ST. MARYS AND GRANDVIEW PARK AT 1110 PM.

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

$$

LAT...LON 4161 7892 4139 7895 4129 7873 4128 7829
          4165 7854

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 21, 10:05 PM EDT, 27 minutes earlier.

Area forecast discussion, Jun 21, 10:05 PM EDT, 27 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE STATE COLLEGE PA
930 PM EDT THU JUN 21 2001

QUICK EVENING UPDATE. ONCE AGAIN LIKE LAST NIGHT...SVR WEATHER
THREAT EVOLVING INTO A HEAVY RAIN POTENTIAL. SPORADIC FLASH FLOOD
WARNINGS ALREADY HAVE BEEN ISSUED. WILL BE ISSUING A FLASH FLOOD
WATCH FOR WESTERN COUNTIES AND NORTHWEST MOUNTAINS BASED ON OBSERVED
RAFL AND MOSAIC OF RADAR. MORE HEAVY TSRA MOVING WILL BE MOVING INTO
THE WATCH AR{EA.

.CTP...FLASH FLOOD WATCH OVERNIGHT PAZ004-005-010-011-017-024-033.

JUNG

In the hours before

Local storm report, Jun 21, 4:37 PM EDT, 5 hours 55 minutes before

PHLWRKLSR
TTAAOO KCTP 212037

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE STATE COLLEGE, PA
437 PM EDT THU JUN 21 2001

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

0410 PM    ALTOONA                   PA   WIND DAMAGE
06/21/01   BLAIR                          TREE AND LARGE LIMBS DOWN.

0410 PM    ALTOONA                   PA   FLOODING
06/21/01   BLAIR                          FLOODING ON CITY ROADS
                                          INCLUDING ROUTE 36 NEAR
                                          15TH AVE AND 18TH STREET.
                                          ALSO REPORTS OF FAST
           ,                               FLOWING WATER ON 7TH AVE.
                                          MANHOLE COVERS BLOWN OFF.

GAD/PAJ

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 21, 8:12 PM EDT	Severe Thunderstorm Warning	CTP	Clinton	63 min
Jun 21, 10:16 PM EDT	Flash Flood Warning	CTP	Franklin	3 hr
Jun 21, 10:34 PM EDT	Severe Thunderstorm Warning	CTP	Clearfield	71 min
Jun 21, 10:44 PM EDT	Flash Flood Warning	CTP	Clearfield	4 hr
Jun 21, 10:47 PM EDT	Severe Thunderstorm Warning	CTP	McKean	58 min
Jun 21, 10:52 PM EDT	Flash Flood Warning	CTP	Warren	113 min
Jun 21, 11:25 PM EDT	Severe Thunderstorm Warning	CTP	Cameron	65 min
Jun 22, 1:09 AM EDT	Flash Flood Warning	CTP	Franklin	66 min
Jun 22, 2:36 AM EDT	Flash Flood Warning	CTP	Northumberland	114 min
Jun 22, 3:09 AM EDT	Severe Thunderstorm Warning	CTP	Columbia, Montour	36 min
Jun 22, 11:30 AM EDT	Severe Thunderstorm Warning	CTP	York	60 min
Jun 22, 1:42 PM EDT	Flash Flood Warning	CTP	York	3 hr
Jun 22, 4:05 PM EDT	Severe Thunderstorm Warning	CTP	Lancaster	25 min
Jun 22, 4:30 PM EDT	Flash Flood Warning	CTP	Dauphin, York	3 hr
Jun 22, 4:41 PM EDT	Severe Thunderstorm Warning	CTP	York	49 min
Jun 22, 5:18 PM EDT	Severe Thunderstorm Warning	CTP	Lancaster	27 min
Jun 22, 5:23 PM EDT	Tornado Warning	CTP	Lancaster	37 min
Jun 22, 5:41 PM EDT	Severe Thunderstorm Warning	CTP	Huntingdon	64 min
Jun 22, 5:57 PM EDT	Tornado Warning	CTP	Lancaster	33 min
Jun 22, 6:11 PM EDT	Flash Flood Warning	CTP	Lancaster	3 hr
Jun 22, 7:30 PM EDT	Flash Flood Warning	CTP	York	6 hr

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.