Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2017

Severe Thunderstorm Warning 119, NWS Binghamton, NY

July 20, 2017Pike County, Pennsylvania

NWS Binghamton, NY issued this severe thunderstorm warning at Jul 20, 2017, 6:29 PM EDT for Pike County, Pennsylvania. It was in force for 16 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
Jul 20, 2017, 6:29 PM EDT (22:29 UTC)
Expired
Jul 20, 2017, 6:45 PM EDT
In force
16 min
Issued by
NWS Binghamton, NY
Area
Storm-based polygon
Hail
0.75 in
Wind
60.0 mph

County Pike County, PA

The radar

The Binghamton radar (KBGM), 125 km from the middle of the area, began a volume at 22:28 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.

IssuedProductOfficeLasted
Jul 20, 1:11 PM EDTSevere Thunderstorm WatchSPC6 hr

The nearest sounding before it

Albany, NY (KALY), launched 12:00Z, 10.5 hours before the alert went out and 181 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-pSkew-T log-p diagram, Albany, NY at 12:00Z on 2017-07-20Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 41 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Albany, NY at 12:00Z on 2017-07-20The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 30 square meters per square second.1939587897Sfc1 km3 km6 km9 kmRMLM
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
41 J/kg
Mixed-layer CIN
-99 J/kg
Mixed-layer LCL
1120 m above ground
0-6 km bulk shear
38 kt
0-1 km storm-relative helicity
30 m²/s²
0-3 km storm-relative helicity
89 m²/s²
Significant tornado parameter
0.0
Supercell composite
-0.0

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 Jul 20, 4:05 PM EDT, 2 hours 24 minutes earlier.

Area forecast discussion, Jul 20, 4:05 PM EDT, 2 hours 24 minutes before
Area Forecast Discussion
National Weather Service Binghamton NY
405 PM EDT Thu Jul 20 2017

.SYNOPSIS...
Thunderstorms moving ahead of a cold front will move through the
area this afternoon. Clearing skies this evening will result in
valley fog developing once again. High pressure and drier air
will return Friday.

&&

.NEAR TERM /THROUGH FRIDAY/...
4 PM update...
Storms have moved out of the northwest counties so have
cancelled the severe thunderstorm watch. Updated the grids to
better resemble the current weather. After this goes through it
should be dry. Best severe with the MCV is on the leading south
and southeast edges. Quick inch of rain in half an hour leading
to flash flooding.

previous discussion...
MCC dropping into western NY this afternoon will march se and
spread convection over the area. Mid level dry punch and good
shear will likely help develop areas of severe weather with the
cells. PWAT's lower so flooding risk is less, but antecedent
conditions are making the area very vulnerable so heavy amounts
of rain in a short time will need to be watched.

High pressure builds in for tonight, and low level moisture will
likely result in valley fog development once again. High
pressure and drier air returns for Friday into Friday night.

&&

.SHORT TERM /FRIDAY NIGHT THROUGH SUNDAY NIGHT/...
215 pm update...
Should be a fairly active weekend with large scale synoptic pattern
and a cool nwly flow in place. A series of embedded short waves will
rotate around the base of the upper trough and act in phase with
multiple surface features to produce periods of showers and
thunderstorms.

The early part of Saturday looks dry as high pressure shifts off to
the east but continues to influence the area with quiet weather. The
pattern changes later in the day. There are some differences in the
timing and placement of the onset of upper short waves expected to
move in later in the day on Saturday but the overall trend should be
a more active pattern with showers and thunderstorms possible
through Sunday. There may be periods of heavy rain with any of these
storms.

Temperatures will remain mild with highs right around 80 and
overnight lows in the lower to mid 60s.

&&

.LONG TERM /MONDAY THROUGH THURSDAY/...
215 am update...
A final upper trough will roll through the region Sunday night and
Monday morning with precipitation lasting through the day Monday.
Weak ridging will develop behind this trough and allow conditions to
dry out. Temperatures will remain on the cool side with  highs in
the 70s and lows in the upper 50s and lower 60s.

&&

.AVIATION /20Z THURSDAY THROUGH TUESDAY/...
MCC will bring a cluster of convection through much of the
forecast area this afternoon bringing thunder and brief MVFR
conditions. Clearing after the storms will result in some fog
development overnight, especially at ELM where IFR conditions
are likely. VFR returns Friday with drier air under high
pressure.

Outlook...

Saturday through Monday...Chance of showers/storms and
associated restrictions.

Tuesday...VFR.

&&

.BGM WATCHES/WARNINGS/ADVISORIES...
PA...None.
NY...Flash Flood Watch until 5 PM EDT this afternoon for NYZ009-
     015>018-022-023-025-036-037-044.

&&

SYNOPSIS...DGM/TAC
NEAR TERM...DGM/TAC
SHORT TERM...BJT
LONG TERM...BJT
AVIATION...DGM
Hazardous weather outlook, Jul 20, 5:19 PM EDT, 1 hour 10 minutes before
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In the hours before

Local storm report, Jul 20, 5:36 PM EDT, 53 minutes before
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Local storm report, Jul 20, 5:44 PM EDT, 45 minutes before
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Local storm report, Jul 20, 5:47 PM EDT, 42 minutes before
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Local storm report, Jul 20, 6:07 PM EDT, 22 minutes before
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Local storm report, Jul 20, 6:13 PM EDT, 16 minutes before
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Local storm report, Jul 20, 6:15 PM EDT, 14 minutes before
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The office that day

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

IssuedProductOfficeCountiesLasted
Jul 20, 1:52 PM EDTFlash Flood WatchBGMCayuga, Cortland, Madison, Oneida, Onondaga, Schuyler and 4 more3 hr
Jul 20, 1:57 PM EDTSevere Thunderstorm WarningBGMSteuben63 min
Jul 20, 2:57 PM EDTSevere Thunderstorm WarningBGMChemung, Steuben33 min
Jul 20, 3:00 PM EDTAreal Flood AdvisoryBGMSteuben6 hr
Jul 20, 3:11 PM EDTAreal Flood AdvisoryBGMChemung, Schuyler, Steuben, Tompkins, Yates6 hr
Jul 20, 3:19 PM EDTSevere Thunderstorm WarningBGMChemung, Schuyler, Tioga, Tompkins26 min
Jul 20, 3:28 PM EDTFlash Flood WarningBGMChemung, Schuyler, Steuben, Tioga, Tompkins3 hr
Jul 20, 3:44 PM EDTSevere Thunderstorm WarningBGMBroome, Chemung, Tioga46 min
Jul 20, 3:51 PM EDTFlash Flood WarningBGMBroome, Chemung, Steuben, Tioga6 hr
Jul 20, 4:30 PM EDTAreal Flood AdvisoryBGMBroome6 hr
Jul 20, 5:44 PM EDTSevere Thunderstorm WarningBGMSullivan46 min
Jul 20, 5:51 PM EDTAreal Flood AdvisoryBGMSullivan3 hr
Jul 20, 3:29 PM EDTSevere Thunderstorm WarningBGMBradford61 min
Jul 20, 4:16 PM EDTSevere Thunderstorm WarningBGMBradford14 min
Jul 20, 4:28 PM EDTSevere Thunderstorm WarningBGMBradford, Lackawanna, Susquehanna, Wyoming32 min
Jul 20, 4:47 PM EDTSevere Thunderstorm WarningBGMLuzerne, Wyoming28 min
Jul 20, 4:59 PM EDTSevere Thunderstorm WarningBGMLackawanna, Luzerne, Susquehanna, Wayne, Wyoming46 min
Jul 20, 5:12 PM EDTSevere Thunderstorm WarningBGMLuzerne48 min
Jul 20, 5:15 PM EDTAreal Flood AdvisoryBGMLackawanna, Luzerne, Susquehanna, Wayne, Wyoming3 hr
Jul 20, 5:42 PM EDTSevere Thunderstorm WarningBGMLuzerne63 min

Nearby

Severe Thunderstorm Warnings in Pennsylvania, 2017Every severe thunderstorm warning in 2017

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.