Alert archive / Pennsylvania / Special Weather Statements in 2017

Special Weather Statement, NWS State College, PA

October 23, 2017Clearfield County, Pennsylvania

NWS State College, PA issued this special weather statement at Oct 23, 2017, 11:29 PM EDT for Clearfield County, Pennsylvania. It was in force for 31 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued
Oct 23, 2017, 11:29 PM EDT (03:29 UTC)
Expired
Oct 24, 2017, 12:00 AM EDT
In force
31 min
Issued by
NWS State College, PA

County Clearfield County, PA

The radar

The State College radar (KCCX), 61 km from the middle of the area, began a volume at 03:32 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.

The nearest sounding before it

Pittsburgh, PA (KAGC), launched 00:00Z, 3.5 hours before the alert went out and 137 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, Pittsburgh, PA at 00:00Z on 2017-10-24Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCLEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Pittsburgh, PA at 00:00Z on 2017-10-24The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -256 square meters per square second.1939587897Sfc1 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
530 m above ground
0-6 km bulk shear
59 kt
0-1 km storm-relative helicity
-256 m²/s²
0-3 km storm-relative helicity
162 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

858 
WWUS81 KCTP 240329
SPSCTP

Special Weather Statement
National Weather Service State College PA
1129 PM EDT MON OCT 23 2017
 
PAZ017-240400-
Clearfield PA-
1129 PM EDT MON OCT 23 2017

...SPECIAL WEATHER STATEMENT FOR PARTS OF CLEARFIELD COUNTY UNTIL
MIDNIGHT EDT...

At 1128 PM EDT, Doppler radar indicated a heavy shower with strong 
wind gusts 10 miles north of Northern Cambria, moving northeast at 
65 mph.

Wind gusts of 50 to 55 mph are possible.

Locations impacted include...
DuBois, Rockton, Sandy, Parker Dam State Park, S.B. Elliot State
Park, Penfield, Grampian, Troutville, Mahaffey, Burnside, New
Washington, Penn State Dubois and Treasure Lake.

LAT...LON 4109 7880 4120 7875 4120 7870 4122 7865
      4124 7864 4121 7842 4072 7876 4073 7880
      4080 7881
TIME...MOT...LOC 0328Z 202DEG 58KT 4081 7881 

$$

KF

The office that day

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

IssuedProductOfficeCountiesLasted
Oct 24, 12:01 AM EDTSpecial Weather StatementCTPElk, McKean29 min
Oct 24, 12:35 AM EDTSpecial Weather StatementCTPMcKean25 min
Oct 24, 4:35 AM EDTSpecial Weather StatementCTPDauphin, Lebanon25 min
Oct 24, 5:06 AM EDTSpecial Weather StatementCTPColumbia, Schuylkill39 min
Oct 24, 5:30 AM EDTSpecial Weather StatementCTPColumbia, Montour30 min

Nearby

Special Weather Statements in Pennsylvania, 2017Every special weather statement in 2017

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; radar from the NEXRAD Level II archive.