Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 1993

Severe Thunderstorm Warning 50, NWS State College, PA

August 11, 1993Adams County, Pennsylvania

NWS State College, PA issued this severe thunderstorm warning at Aug 11, 1993, 6:27 PM EDT for Adams County, Pennsylvania. It was in force for 33 min.

The area

The counties it named.

The facts

Issued: Aug 11, 1993, 6:27 PM EDT (22:27 UTC)
Expired: Aug 11, 1993, 7:00 PM EDT
In force: 33 min
Issued by: NWS State College, PA
Area: Whole counties

County Adams County, PA

The radar

The Sterling radar (KLWX), 102 km from the middle of the area, began a volume at 22:31 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, 10.5 hours before the alert went out and 104 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: NaN m above ground
0-6 km bulk shear: 20 kt
0-1 km storm-relative helicity: 56 m²/s²
0-3 km storm-relative helicity: 67 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.

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.

In the hours before

Special weather statement, Aug 11, 5:35 PM EDT, 52 minutes before

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Special weather statement, Aug 11, 5:50 PM EDT, 37 minutes before

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Special weather statement, Aug 11, 5:55 PM EDT, 32 minutes before

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Special weather statement, Aug 11, 6:10 PM EDT, 17 minutes before

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Special weather statement, Aug 11, 6:12 PM EDT, 15 minutes before

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Special weather statement, Aug 11, 6:13 PM EDT, 14 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
Aug 11, 7:13 PM EDT	Flash Flood Warning	CTP	Adams, York	32 min
Aug 11, 7:13 PM EDT	Severe Thunderstorm Warning	CTP	Adams, York	32 min
Aug 11, 7:50 PM EDT	Flash Flood Warning	CTP	Adams, York	55 min
Aug 11, 7:50 PM EDT	Severe Thunderstorm Warning	CTP	Adams, York	55 min

Nearby

Severe Thunderstorm Warnings in Pennsylvania, 1993 Every severe thunderstorm warning in 1993

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.