Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2019

Severe Thunderstorm Warning 306, NWS Pittsburgh, PA

September 28, 20194 counties in Pennsylvania

NWS Pittsburgh, PA issued this severe thunderstorm warning at Sep 28, 2019, 7:15 PM EDT for 4 counties in Pennsylvania. It was in force for 45 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 28, 2019, 7:15 PM EDT (23:15 UTC)
Expired
Sep 28, 2019, 8:00 PM EDT
In force
45 min
Issued by
NWS Pittsburgh, PA
Area
Storm-based polygon
Hail
1.0 in
Wind
60.0 mph

Counties Allegheny County, PA, Fayette County, PA, Washington County, PA, Westmoreland County, PA

The radar

The Pittsburgh radar (KPBZ), 47 km from the middle of the area, began a volume at 23:18 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.

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 Pittsburgh, PA wrote its last area forecast discussion before this severe thunderstorm warning went out at Sep 28, 5:27 PM EDT, 1 hour 48 minutes earlier.

Area forecast discussion, Sep 28, 5:27 PM EDT, 1 hour 48 minutes before
Area Forecast Discussion
National Weather Service Pittsburgh PA
527 PM EDT Sat Sep 28 2019

.SYNOPSIS...
A crossing cold front will bring scattered showers and thunderstorms
into this evening. Mainly dry weather is expected Sunday under
building high pressure.

&&

.NEAR TERM /UNTIL 6 AM SUNDAY MORNING/...
No major alterations were needed for the eve update as a cold front
will cross the Upr OH this eve spawning scattered showers and a few
storms with passage. A marginal severe threat continues with possible
damaging wind gusts, but the supporting shortwave is not improving
mid level lapse rates and is filling the mid levels with moisture,
thus degrading downdraft cape. Any severe threat looks to be short
lived and isolated with dependence on modest deep-layer shear and
updraft balance, best potential for looking to be generally along the
I 70 corridor where warmth and dewpoint are maximized.

Post-frontal low level moisture and llvl lift is expected to spawn
areas of lower clouds overnight.

&&

.SHORT TERM /6 AM SUNDAY MORNING THROUGH MONDAY NIGHT/...
In the wake of the shortwave tonight, the southeast CONUS ridge is
projected to reamplify in response to deep low pressure digging
north of the Great Basin. Sunday will thus feature dry weather and
temperature about 10 degrees above the averages with mitigation via
weak ene low level flow.

The rest of the short term period will feature continued warmth
marred by some low, shortwave dependant precip chances with a couple
disturbances crossing the northern periphery of the eastern CONUS
ridge.
&&

.LONG TERM /TUESDAY THROUGH SATURDAY/...
The ridge is projected to reach maximum intensity over our region on
Tuesday, with dry weather and very warm temperature. A frontal
boundary is still forecast to sink into the region during the midweek
period, bringing the next best chance of rain. Behind this front,
drier weather and more seasonable temperature can be expected for
weeks end.

&&

.AVIATION /21Z SATURDAY THROUGH THURSDAY/...
Evening VFR will be marred by nmrs shra and isold tsra being spawned
via a crossing cdfnt. Convective restrictions are expected to be
brief, and possibly accompanied by some 30 to 40 kt wind gusts.

Wind will veer toward the north after fropa and cig restrictions are
expected to become more widespread as IFR stratus forms with a
shallow inversion forming with the cool influx. Improvement may be
slow on Sunday for terminals fm pit n and ewd as ene llvl flow
reinforces the inversion.

.Outlook...
No widespread restrictions expected under high pressure ridging.

&&

.PBZ WATCHES/WARNINGS/ADVISORIES...
MD...None.
OH...None.
PA...None.
WV...None.

&&
Hazardous weather outlook, Sep 28, 4:02 AM EDT, 15 hours 13 minutes before
Hazardous Weather Outlook
National Weather Service Pittsburgh PA
402 AM EDT Sat Sep 28 2019

OHZ039>041-048>050-057>059-068-069-PAZ007>009-013>016-020>023-029-
031-073>076-WVZ001>004-012-021-509-510-290815-
Tuscarawas-Carroll-Columbiana-Coshocton-Harrison-Jefferson OH-
Muskingum-Guernsey-Belmont-Noble-Monroe-Mercer-Venango-Forest-
Lawrence-Butler-Clarion-Jefferson PA-Beaver-Allegheny-Armstrong-
Indiana-Washington-Greene-Westmoreland-Westmoreland Ridges-Fayette-
Fayette Ridges-Hancock-Brooke-Ohio-Marshall-Wetzel-Marion-Monongalia-
Ridges of Eastern Monongalia and Northwestern Preston-
402 AM EDT Sat Sep 28 2019

This Hazardous Weather Outlook is for east central Ohio, northwest
Pennsylvania, southwest Pennsylvania, west central Pennsylvania,
western Pennsylvania, northern West Virginia and northern panhandle
of West Virginia.

.DAY ONE...Today and tonight.

Isolated strong to severe storms are possible late this afternoon
and evening. The main threat will be damaging wind gusts.

.DAYS TWO THROUGH SEVEN...Sunday through Friday.

No hazardous weather is expected at this time.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not expected at this time.

MDZ001-WVZ511>514-290815-
Garrett-Preston-Eastern Preston-Western Tucker-Eastern Tucker-
402 AM EDT Sat Sep 28 2019

This Hazardous Weather Outlook is for western Maryland and northern
West Virginia.

.DAY ONE...Today and tonight.

No hazardous weather is expected at this time.

.DAYS TWO THROUGH SEVEN...Sunday through Friday.

No hazardous weather is expected at this time.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not expected at this time.

In the hours before

Special weather statement, Sep 28, 5:01 PM EDT, 2 hours 14 minutes before
Special Weather Statement
National Weather Service Pittsburgh PA
501 PM EDT Sat Sep 28 2019

OHZ039-048-049-057-058-068-282145-
Guernsey-Noble-Tuscarawas-Coshocton-Harrison-Muskingum-
501 PM EDT Sat Sep 28 2019

...A STRONG THUNDERSTORM CAPABLE OF PRODUCING SMALL HAIL AND GUSTY
WIND WILL AFFECT THE AREA...

At 500 PM EDT, a strong thunderstorm was located 8 miles south of
Coshocton, moving east at 25 mph.

Wind gusts up to 45 mph and small hail are possible with this storm.

Locations impacted include...
Coshocton...                      Cambridge...
Freeport...                       Newcomerstown...
New Concord...                    Byesville...
West Lafayette...                 Dresden...
Antrim...                         Senecaville...
Conesville...                     Lore City...

This includes the following highways...
  Interstate 70 in Ohio between mile markers 170 and 194.
  Interstate 77 in Ohio between mile markers 40 and 63.

LAT...LON 4005 8206 4033 8191 4021 8123 3990 8137
TIME...MOT...LOC 2100Z 280DEG 20KT 4015 8186

07
Special weather statement, Sep 28, 6:07 PM EDT, 1 hour 8 minutes before
Special Weather Statement
National Weather Service Pittsburgh PA
607 PM EDT Sat Sep 28 2019

OHZ041-050-PAZ020-021-029-WVZ001-282245-
Jefferson-Columbiana-Beaver-Washington-Allegheny-Hancock-
607 PM EDT Sat Sep 28 2019

...A STRONG THUNDERSTORM CAPABLE OF PRODUCING GUSTY WIND WILL
AFFECT THE AREA...

At 607 PM EDT, a strong thunderstorm was located near Calcutta, or
near Wellsville, moving southeast at 30 mph.

Wind gusts up to 55 mph are possible with this storm.

Locations impacted include...
McCandless Township...            Moon Township...
Franklin Park...                  East Liverpool...
Aliquippa...                      Monaca...
Wellsville...                     Robinson Township...
Economy...                        Kennedy Township...
Ambridge...                       Wexford...

This includes the following highways...
  Interstate 79 in Pennsylvania between mile markers 64 and 75.
  Interstate 376 in Pennsylvania between mile markers 36 and 61.

LAT...LON 4061 8079 4079 8069 4062 8005 4037 8019
TIME...MOT...LOC 2207Z 293DEG 28KT 4068 8066

07
Special weather statement, Sep 28, 7:09 PM EDT, 6 minutes before
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The office that day

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

IssuedProductOfficeCountiesLasted
Sep 28, 6:07 PM EDTSpecial Weather StatementPBZBeaver38 min
Sep 28, 6:16 PM EDTSevere Thunderstorm WarningPBZAllegheny, Beaver, Washington44 min
Sep 28, 6:32 PM EDTSevere Thunderstorm WarningPBZFayette, Greene, Washington43 min
Sep 28, 6:52 PM EDTSevere Thunderstorm WarningPBZAllegheny, Indiana, Westmoreland38 min
Sep 28, 7:09 PM EDTSpecial Weather StatementPBZAllegheny51 min
Sep 28, 5:01 PM EDTSpecial Weather StatementPBZGuernsey44 min
Sep 28, 5:25 PM EDTSevere Thunderstorm WarningPBZBelmont, Guernsey, Monroe, Muskingum, Noble50 min
Sep 28, 6:14 PM EDTSevere Thunderstorm WarningPBZBelmont, Monroe, Noble46 min
Sep 28, 6:42 PM EDTSevere Thunderstorm WarningPBZHarrison, Jefferson29 min
Sep 28, 6:57 PM EDTSevere Thunderstorm WarningPBZMonroe48 min
Sep 28, 7:43 PM EDTSevere Thunderstorm WarningPBZMarion, Wetzel33 min

Nearby

Severe Thunderstorm Warnings in Pennsylvania, 2019Every severe thunderstorm warning in 2019

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; radar from the NEXRAD Level II archive.