Alert archive / Pennsylvania / Special Weather Statements in 2021

Special Weather Statement, NWS State College, PA

September 13, 2021McKean County, Pennsylvania

NWS State College, PA issued this special weather statement at Sep 13, 2021, 12:24 AM EDT for McKean County, Pennsylvania. It was in force for 36 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: Sep 13, 2021, 12:24 AM EDT (04:24 UTC)
Expired: Sep 13, 2021, 1:00 AM EDT
In force: 36 min
Issued by: NWS State College, PA
Hail: 0.00 in
Wind: 55

County McKean County, PA

The radar

The Buffalo radar (KBUF), 113 km from the middle of the area, began a volume at 04:22 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

Buffalo Intl Airport, NY (KBUF), launched 00:00Z, 4.4 hours before the alert went out and 111 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: 412 J/kg
Mixed-layer CIN: -125 J/kg
Mixed-layer LCL: 706 m above ground
0-6 km bulk shear: 50 kt
0-1 km storm-relative helicity: 205 m²/s²
0-3 km storm-relative helicity: 168 m²/s²
Significant tornado parameter: 0.2
Supercell composite: 1.5

Open this sounding in Storm Lab

The text

As transmitted.

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What forecasters said that day

The local office's own words before this special weather statement 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 special weather statement went out at Sep 12, 11:19 PM EDT, 1 hour 5 minutes earlier.

Area forecast discussion, Sep 12, 11:19 PM EDT, 1 hour 5 minutes before

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Hazardous weather outlook, Sep 12, 2:36 PM EDT, 9 hours 48 minutes before

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In the hours before

Special weather statement, Sep 13, 12:24 AM EDT, 0 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
Sep 13, 12:53 AM EDT	Special Weather Statement	CTP	McKean, Potter, Tioga	52 min
Sep 13, 5:15 PM EDT	Special Weather Statement	CTP	Warren	30 min
Sep 13, 5:45 PM EDT	Special Weather Statement	CTP	Potter	30 min
Sep 13, 6:14 PM EDT	Special Weather Statement	CTP	Potter	31 min
Sep 13, 6:21 PM EDT	Special Weather Statement	CTP	Elk	24 min
Sep 13, 6:36 PM EDT	Special Weather Statement	CTP	Lycoming	24 min
Sep 13, 6:43 PM EDT	Severe Thunderstorm Warning	CTP	Lycoming	47 min
Sep 13, 7:18 PM EDT	Severe Thunderstorm Warning	CTP	Columbia, Lycoming, Sullivan	57 min

Nearby

Special Weather Statements in Pennsylvania, 2021 Every special weather statement in 2021

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.