Mesoscale Discussion 1273

Issued

Jul 13, 2021, 6:44 PM EDT (22:44 UTC)

Expired

Jul 13, 2021, 8:15 PM EDT

In force

91 min

Issued by

the Storm Prediction Center

Concerning

Severe thunderstorm watch 375

The Binghamton radar (KBGM), 94 km from the middle of the area, began a volume at 22:44 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

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657 
ACUS11 KWNS 132244
SWOMCD
SPC MCD 132244 
NYZ000-PAZ000-140015-

Mesoscale Discussion 1273
NWS Storm Prediction Center Norman OK
0544 PM CDT Tue Jul 13 2021

Areas affected...Central Pennsylvania and central New York

Concerning...Severe Thunderstorm Watch 375...

Valid 132244Z - 140015Z

The severe weather threat for Severe Thunderstorm Watch 375
continues.

SUMMARY...A broken line of storms in western New York into central
Pennsylvania will continue east into a better thermodynamic
environment. Damaging winds will continue to be the main thereat
into the early evening. A localized tornado threat exists from
central Pennsylvania into south-central New York.

DISCUSSION...A broken line of storms continues eastward from western
New York into central Pennsylvania. The most organized portion of
the line is now just west of State College, PA, and will move into a
better thermodynamic environment in the next 1-2 hours. Damaging
winds will continue to be the primary hazard with this line into the
early evening. Discrete storms modes may produce marginally severe
hail, but this will generally be limited by modest mid-level lapse
rates.

While the overall tornado threat is low, a modest increase in 850 mb
winds late this afternoon and early evening will enlarge low-level
hodographs in central Pennsylvania and central New York. With the
approach of the mid-level shortwave trough, surface winds east of
State College, PA, to west of Binghamton, NY, have backed over the
last hour. So long as a few discrete elements remain in the broken
line, the tornado threat -- though low -- would be maximized in this
region through 8-9 PM EDT.

..Wendt.. 07/13/2021

...Please see www.spc.noaa.gov for graphic product...

ATTN...WFO...ALY...BGM...BUF...CTP...PBZ...

LAT...LON   40417914 42817896 43827722 44057593 43737530 42977514
            41097598 40047732 40417914

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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.