Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2013

Severe Thunderstorm Warning 135, NWS Binghamton, NY

September 12, 20134 counties in Pennsylvania

NWS Binghamton, NY issued this severe thunderstorm warning at Sep 12, 2013, 4:03 PM EDT for 4 counties in Pennsylvania. It was in force for 42 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: Sep 12, 2013, 4:03 PM EDT (20:03 UTC)
Expired: Sep 12, 2013, 4:45 PM EDT
In force: 42 min
Issued by: NWS Binghamton, NY
Area: Storm-based polygon

Counties Bradford County, PA, Luzerne County, PA, Susquehanna County, PA, Wyoming County, PA

The radar

The Binghamton radar (KBGM), 70 km from the middle of the area, began a volume at 20:06 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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Sep 12, 12:37 PM EDT	Severe Thunderstorm Watch	SPC	7 hr

The nearest sounding before it

Albany, NY (KALY), launched 12:00Z, 8.1 hours before the alert went out and 223 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: 261 J/kg
Mixed-layer CIN: -114 J/kg
Mixed-layer LCL: 802 m above ground
0-6 km bulk shear: 29 kt
0-1 km storm-relative helicity: 30 m²/s²
0-3 km storm-relative helicity: 87 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.8

Open this sounding in Storm Lab

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.

NWS Binghamton, NY wrote its last area forecast discussion before this severe thunderstorm warning went out at Sep 12, 3:59 PM EDT, 4 minutes earlier.

Area forecast discussion, Sep 12, 3:59 PM EDT, 4 minutes before

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Hazardous weather outlook, Sep 12, 12:41 PM EDT, 3 hours 22 minutes before

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In the hours before

Local storm report, Sep 12, 12:42 PM EDT, 3 hours 21 minutes before

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Local storm report, Sep 12, 12:43 PM EDT, 3 hours 20 minutes before

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Special weather statement, Sep 12, 12:50 PM EDT, 3 hours 13 minutes before

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Special weather statement, Sep 12, 2:19 PM EDT, 1 hour 44 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE BINGHAMTON NY
219 PM EDT THU SEP 12 2013

NYZ023>025-055-121900-
CHEMUNG NY-SCHUYLER NY-TIOGA NY-TOMPKINS NY-
219 PM EDT THU SEP 12 2013

...STRONG THUNDERSTORM WILL AFFECT EXTREME SOUTHEASTERN SCHUYLER...
NORTHEASTERN CHEMUNG...NORTHERN TIOGA AND SOUTHERN TOMPKINS
COUNTIES...

* AT 216 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
STRONG THUNDERSTORM CAPABLE OF PRODUCING GUSTY WINDS TO 45 MPH...AND
VERY HEAVY RAIN.  THIS STORM WAS LOCATED NEAR ERIN...AND MOVING
NORTHEAST AT 30 MPH.

* THE STRONG THUNDERSTORM WILL BE NEAR...
  NORTH SPENCER AND SPENCER AT 230 PM EDT...
  WEST CANDOR AND DANBY AT 235 PM EDT...
  SOUTH DANBY AT 240 PM EDT...
  WILLSEYVILLE AND CANDOR AT 245 PM EDT...
  WEST SLATERVILLE AT 250 PM EDT...
  SPEEDVILLE AND CAROLINE AT 255 PM EDT...
  RICHFORD AND BERKSHIRE AT 300 PM EDT...

THIS STORM HAS THE POTENTIAL TO BECOME SEVERE AND PRODUCE LARGE HAIL
AND/OR DAMAGING WINDS.

LAT...LON 4246 7626 4241 7625 4241 7613 4235 7611
      4233 7612 4231 7610 4228 7610 4228 7608
      4226 7608 4211 7668 4227 7677

/RHB

Special weather statement, Sep 12, 3:53 PM EDT, 10 minutes before

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The office that day

Everything else NWS Binghamton, NY issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Sep 12, 11:41 AM EDT	Severe Thunderstorm Warning	BGM	Cayuga, Cortland, Seneca, Yates	49 min
Sep 12, 12:50 PM EDT	Special Weather Statement	BGM	Tompkins	55 min
Sep 12, 2:19 PM EDT	Special Weather Statement	BGM	Tioga	41 min
Sep 12, 3:53 PM EDT	Special Weather Statement	BGM	Broome	67 min
Sep 11, 8:25 PM EDT	Special Weather Statement	BGM	Pike	50 min
Sep 12, 3:24 PM EDT	Severe Thunderstorm Warning	BGM	Bradford, Wyoming	66 min
Sep 12, 4:35 PM EDT	Special Weather Statement	BGM	Lackawanna, Susquehanna, Wayne	55 min

Nearby

Severe Thunderstorm Warnings in Pennsylvania, 2013 Every severe thunderstorm warning in 2013

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.