Alert archive / Pennsylvania / Special Weather Statements in 2012

Special Weather Statement, NWS State College, PA

May 4, 2012Dauphin County, Pennsylvania

NWS State College, PA issued this special weather statement at May 4, 2012, 1:44 PM EDT for Dauphin County, Pennsylvania. It was in force for 46 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: May 4, 2012, 1:44 PM EDT (17:44 UTC)
Expired: May 4, 2012, 2:30 PM EDT
In force: 46 min
Issued by: NWS State College, PA

County Dauphin County, PA

The radar

The State College radar (KCCX), 112 km from the middle of the area, began a volume at 17:44 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, 5.7 hours before the alert went out and 162 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: 891 J/kg
Mixed-layer CIN: -164 J/kg
Mixed-layer LCL: 905 m above ground
0-6 km bulk shear: 19 kt
0-1 km storm-relative helicity: 46 m²/s²
0-3 km storm-relative helicity: 136 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

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

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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 May 4, 1:24 PM EDT, 20 minutes earlier.

Area forecast discussion, May 4, 1:24 PM EDT, 20 minutes before

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Hazardous weather outlook, May 4, 1:02 PM EDT, 42 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE STATE COLLEGE PA
102 PM EDT FRI MAY 4 2012

PAZ004>006-010>012-017>019-024>028-033>037-041-042-045-046-049>053-
056>059-063>066-051715-
WARREN-MCKEAN-POTTER-ELK-CAMERON-NORTHERN CLINTON-CLEARFIELD-
NORTHERN CENTRE-SOUTHERN CENTRE-CAMBRIA-BLAIR-HUNTINGDON-MIFFLIN-
JUNIATA-SOMERSET-BEDFORD-FULTON-FRANKLIN-TIOGA-NORTHERN LYCOMING-
SULLIVAN-SOUTHERN CLINTON-SOUTHERN LYCOMING-UNION-SNYDER-MONTOUR-
NORTHUMBERLAND-COLUMBIA-PERRY-DAUPHIN-SCHUYLKILL-LEBANON-CUMBERLAND-
ADAMS-YORK-LANCASTER-
102 PM EDT FRI MAY 4 2012

THIS HAZARDOUS WEATHER OUTLOOK IS FOR CENTRAL PENNSYLVANIA.

.DAY ONE...THIS AFTERNOON AND TONIGHT.

THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS THIS AFTERNOON AND
EVENING. THE MOST LIKELY THREAT IS FOR DAMAGING WIND GUSTS AND
SMALL HAIL...ALONG WITH HEAVY DOWNPOURS AND FREQUENT LIGHTNING
FROM ANY STORMS.

.DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY.

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION IS NOT EXPECTED AT THIS TIME.

DEVOIR

In the hours before

Special weather statement, May 4, 1:44 PM EDT, 0 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE STATE COLLEGE PA
144 PM EDT FRI MAY 4 2012

PAZ056-057-063-041830-
CUMBERLAND PA-DAUPHIN PA-PERRY PA-
144 PM EDT FRI MAY 4 2012

...A STRONG THUNDERSTORM WILL AFFECT CENTRAL DAUPHIN...EAST CENTRAL
PERRY AND NORTHEASTERN CUMBERLAND COUNTIES...

AT 139 PM EDT...A STRONG THUNDERSTORM WAS NEAR SHERMANSDALE...MOVING
EAST AT 30 MPH.

THIS STORM WILL AFFECT MARYSVILLE...ROCKVILLE...LINGLESTOWN AND
SKYLINE VIEW.

THIS STORM MAY PRODUCE SMALL HAIL...GUSTY WINDS TO 40 MPH AND HEAVY
DOWNPOURS.

THIS WILL IMPACT THE FOLLOWING CENTRAL PENNSYLVANIA INTERSTATES...
I-81 BETWEEN MILE MARKERS 59 AND 76...I-83 BETWEEN MILE MARKERS 44
AND 50...I-283.

THIS WILL ALSO IMPACT THE FOLLOWING MAJOR ROADS...ROUTE 11/15...ROUTE
22...ROUTE 322...ROUTE 322/22.

LAT...LON 4045 7673 4023 7672 4029 7718 4037 7720

FORECASTER: DEVOIR

The office that day

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

Issued	Product	Office	Counties	Lasted
May 3, 8:00 PM EDT	Areal Flood Advisory	CTP	Bedford, Franklin, Fulton	3 hr
May 3, 8:10 PM EDT	Special Weather Statement	CTP	Franklin	65 min
May 4, 12:27 AM EDT	Special Weather Statement	CTP	McKean	33 min
May 4, 12:46 AM EDT	Severe Thunderstorm Warning	CTP	McKean, Potter, Warren	59 min
May 4, 3:22 AM EDT	Special Weather Statement	CTP	Columbia, Montour, Union	68 min
May 4, 3:20 PM EDT	Special Weather Statement	CTP	Schuylkill	25 min
May 4, 4:57 PM EDT	Special Weather Statement	CTP	Cameron	48 min
May 4, 5:48 PM EDT	Special Weather Statement	CTP	Dauphin	27 min
May 4, 6:08 PM EDT	Special Weather Statement	CTP	Dauphin	37 min
May 4, 6:11 PM EDT	Severe Thunderstorm Warning	CTP	Dauphin, Perry	34 min
May 4, 7:18 PM EDT	Special Weather Statement	CTP	Perry	27 min

Nearby

Special Weather Statements in Pennsylvania, 2012 Every special weather statement in 2012

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.