Alert archive / Pennsylvania / Special Weather Statements in 2021

Special Weather Statement, NWS State College, PA

June 10, 2021York County, Pennsylvania

NWS State College, PA issued this special weather statement at Jun 10, 2021, 3:05 PM EDT for York County, Pennsylvania. It was in force for 40 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: Jun 10, 2021, 3:05 PM EDT (19:05 UTC)
Expired: Jun 10, 2021, 3:45 PM EDT
In force: 40 min
Issued by: NWS State College, PA

County York County, PA

The radar

The Sterling radar (KLWX), 101 km from the middle of the area, began a volume at 19:07 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

Washington/Dulle, VA (KIAD), launched 12:00Z, 7.1 hours before the alert went out and 100 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: 163 J/kg
Mixed-layer CIN: -61 J/kg
Mixed-layer LCL: 987 m above ground
0-6 km bulk shear: 6 kt
0-1 km storm-relative helicity: -6 m²/s²
0-3 km storm-relative helicity: 6 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

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 Jun 10, 2:33 PM EDT, 32 minutes earlier.

Area forecast discussion, Jun 10, 2:33 PM EDT, 32 minutes before

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Hazardous weather outlook, Jun 10, 12:05 PM EDT, 3 hours before

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In the hours before

Local storm report, Jun 10, 10:10 AM EDT, 4 hours 55 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE STATE COLLEGE PA
1010 AM EDT THU JUN 10 2021

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0930 AM     FLOOD            1 W LAKEMONT            40.47N 78.40W
06/10/2021                   BLAIR              PA   TRAINED SPOTTER

            FLOODED ROADWAYS, TELEPHONE POLES KNOCKED
            DOWN, LAKEMONT DAM OVER WASHOUT SPOT.

&&

REG

Special weather statement, Jun 10, 3:05 PM 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
Jun 9, 8:00 PM EDT	Special Weather Statement	CTP	Lancaster	15 min
Jun 9, 8:03 PM EDT	Severe Thunderstorm Warning	CTP	Lancaster	27 min
Jun 9, 8:20 PM EDT	Areal Flood Advisory	CTP	Lancaster	85 min
Jun 9, 8:54 PM EDT	Special Weather Statement	CTP	Chester	21 min
Jun 10, 6:19 AM EDT	Areal Flood Advisory	CTP	Blair, Cambria	86 min
Jun 10, 11:47 AM EDT	Flash Flood Watch	CTP	Adams, Bedford, Blair, Cambria, Cumberland, Franklin and 5 more	9 hr
Jun 10, 3:56 PM EDT	Areal Flood Advisory	CTP	Adams, Franklin, York	3 hr

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.