Severe Thunderstorm Warning 8, NWS State College, PA

117 
WWUS51 KCTP 150308
SVSCTP

Severe Weather Statement
National Weather Service State College PA
1108 PM EDT SUN APR 14 2019

PAC027-033-150330-
/O.CON.KCTP.SV.W.0008.000000T0000Z-190415T0330Z/
Clearfield PA-Centre PA-
1108 PM EDT SUN APR 14 2019

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1130 PM EDT
FOR EASTERN CLEARFIELD AND WESTERN CENTRE COUNTIES...

At 1107 PM EDT, a severe thunderstorm was located near Karthaus,
moving northeast at 50 mph.

HAZARD...60 mph wind gusts and penny size hail.

SOURCE...Radar indicated.

IMPACT...Expect damage to roofs, siding, and trees.

Locations impacted include...
Philipsburg, Osceola Mills, Chester Hill, Karthaus, Snow Shoe, North
Philipsburg, Clarence, South Philipsburg, Sandy Ridge, Moshannon,
Pine Glen, Black Moshannon State Park, Morrisdale, West Decatur,
Grassflat, Kylertown and Wallaceton.

For those driving on Interstate 80, this includes areas between the
Woodland and Milesburg exits, specifically from mile markers 127 to
149.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A tornado watch remains in effect for the warned area. Tornadoes can
develop quickly from severe thunderstorms. Although a tornado is not
immediately likely, if one is spotted act quickly and move to a place
of safety inside a sturdy structure, such as a basement or small
interior room.

For your protection move to an interior room on the lowest floor of a
building.

&&

A Tornado Watch remains in effect until 300 AM EDT for central and
north central Pennsylvania.

LAT...LON 4100 7829 4123 7822 4122 7810 4117 7806
      4114 7801 4118 7797 4121 7797 4121 7794
      4125 7790 4118 7790 4118 7779 4115 7779
      4113 7777 4074 7822 4074 7831
TIME...MOT...LOC 0307Z 231DEG 45KT 4110 7818 

HAIL...0.75IN
WIND...60MPH
 
$$

RXR

Area Forecast Discussion
National Weather Service State College PA
1024 PM EDT Sun Apr 14 2019

.SYNOPSIS...
Low pressure over the Ohio Valley will track across upstate
New York tonight, as the trailing cold front pushes through
Pennsylvania. Upper level ridging is expected over the region
during the middle of the week, then a slow-moving cold front
will likely push into the region late Friday into early
Saturday.

&&

.NEAR TERM /UNTIL 6 AM MONDAY MORNING/...
TOR watch issued for the entire CWA. First volley of thunder and
moderate rainfall is a little farther west of the initial cut at
the FFA. Pushed it a couple of counties to the west to include
Adams, etc. Training is occurring just south of Frederick, MD,
with multiple cells crossing directly along the same path thru
there in less than an hour.

Prev...
See hydro section for thoughts on flooding. SWOMCD num 346
mentions the western portions of the CWA in the threat for
severe winds and tornadoes. Some clearing and late day heating
are getting into Warren Co and could come soon to the other
western counties. But, sfc-based CAPE/destabilization is going
to be marginal for the rest of the CWA before nightfall (coming
soon). That may be the only thing which keep the svr threat down
tonight.

Prev...
As of 2 pm, max 10 hour rain totals are closing in on 0.90"
over Warren County. Sfc warm front is draped across the
Central Mountains, with KUNV having broken into the warm sector
with a dewpoint around 60F (KLHV 63F Td as well). Warm front
separates soupy 60+ degree dewpoint air from cool 40s dewpoints
NW and N Central Mountains and Pocono Plateau. Boundary layer
convergence and deep layer moisture increasing substantially
this afternoon ahead of deep upper trof swinging into the Ohio
Valley from the Upper Midwest.

Light to moderate rain has overspread all but the southeast
quarter of my area. Most areas outside of the northwest
mountains have only seen a tenth of two of rainfall thus far
today, while the northwest has exceeded three quarters of an
inch over the last 10 hours. Convective elements within and
ahead of this initial rain area remain in check given weak
forcing to release instability. Consensus of CAM solutions
continue to track this area ENE and into the Lower Susq before
lifting it off to the northeast. HRRR solution brings another
slug of moderate rainfall into my southeast with a renewed surge
and perhaps convective release after 20z, while a lull is seen
across the Central Mountains. Meanwhile, cold front lags well to
the west and isn't progged to reach the OH/PA border until 00z.

Main focus for tonight remains on potential of severe weather
and localized flash flooding tonight associated with passage of
cold front. Nearly all convection-allowing models show a line of
strong convection marching across the forecast area later this
evening through 08z ahead of the cold front. Strongly forced,
high shear/low cape environment suggests a QLCS scenario, but
given the time of day and limited instability, SPC believes this
line will be weakening, particularly east of the Alleghenies.
So, its uncertain how much of a severe punch central and
especially eastern PA will see. Model timing of the fropa and
greatest impacts range from just after 00Z over Warren Co, to
between 07-09Z over Lancaster Co if the line maintains integrity
and intensity. As previously noted, the orientation of the 50kt
0-3km shear vectors are progged to run close to parallel with
the line of convection. However, can't rule out an isolated
tornado or two where rear inflow jet causes any line
surges/bows.

In addition, WPC has placed most of the forecast area within a
slight risk area for flash flooding tonight. However, HREFV2
data indicates the greatest threat will be over the northwest
half of the CWA, where some members indicate the potential of up
to 3 inches in a few spots. As previously mentioned, some of the
northwest has already accumulated around 0.9" in 10 hours. 3hr
FFG numbers are ranging close to 2 inches over most of the area.

&&

.SHORT TERM /6 AM MONDAY MORNING THROUGH 6 PM MONDAY/...
Blustery and much cooler conditions are expected Monday, as
strengthening low pressure passes north of Pa. Passage of upper
trough will likely produce scattered rain/snow showers across
the Allegheny Plateau. However, surface temps should remain too
warm for any snow accumulations. A downsloping westerly flow
should result in dry weather across the Susq Valley. However,
cold temps aloft will likely result in a good deal of stratocu.
Bukfit soundings support wind gusts Monday afternoon close to
40kts across southern Pa, so later shifts may need to consider a
possible wind advisory.

&&

.LONG TERM /MONDAY NIGHT THROUGH SUNDAY/...
Left mentioned of some showers in for later Tuesday into Thursday.
Much of this time will be dry.

The main issue will be another huge weather system by Friday.
Showers and some thunderstorms will be associated with this
system.

For now, just minor adjustments.

For later Saturday into early next Monday, the risk of showers
tapers off. GFS and EC still different from run to run and day
to day, on how the upper level trough may split apart, and dig
southeast. This will make a difference on how things linger past
Friday.

Either way, not looking quite as cold as it did several days
ago. Thus the chance of any snow showers on the back side of the
storm is less now.

&&

.AVIATION /03Z MONDAY THROUGH FRIDAY/...
A line of showers adn thunderstorms is making its way across
central PA from 02Z until 10Z.
 It has caused a period of IFR and lower cigs and vsbys in
thunderstorms. Expect this to occur at all TAF sites at times
overnight. Light showers are out ahead of the line which will
mainly affect IPT and MDT.
 An area of showers behind the front will drop cigs and vsbys
Behind the front which is occurring at BFD.
Westerly flow will pick up with a period of gusts to 30-40 mph
Monday  along with ceiling restrictions that will be mainly
confined to the western/northern terrain.

.Outlook...

Mon...AM Rain and restrictions. Becoming windy.

Tue...Trending VFR; winds subsiding.

Wed-Thu...Chance of a shower. Mainly VFR.

Fri...Widespread restrictions likely with showers and
thunderstorms.

&&

.HYDROLOGY...
0.75-0.90" of rainfall through the day today over the NW has
things very wet and many of the smallest waterways are likely
high/nearly full. The line of convection to the west is
advancing slower to the east than the elements are moving N/NE.
They could also receive more than one thunderstorm this
evening/early tonight. Felt the threat was much higher than FFG
may reflect there with most of the water not accounted for in
the guidance. Plus, we are solidly in the SLGT risk of excessive
rain per WPC guidance.

The southeastern counties got some heavy rain and patchy
flooding two days ago, and they are starting to pick up some
rain now. There is some thunder embedded in the stuff moving up
from MD/VA. HRRR paints a few stripes of >1" rain in convection
there. The Front and associated thunder/heavy rain does not
arrive until late tonight, and we are always wary of overnight
convection. The deep 60+KT LLJet is loaded with moisture. 1 hr
FFG ranges between one inch and two inches. We will also have to
watch out for the Swatara Creek which is running high and is
arguably the wettest basin around the state right now.

&&

.CTP WATCHES/WARNINGS/ADVISORIES...
Flash Flood Watch until 2 AM EDT Monday for PAZ004-005-010.
Flash Flood Watch until 6 AM EDT Monday for PAZ036-056>059-
063>066.

&&

SYNOPSIS...DeVoir/Martin
NEAR TERM...Dangelo/DeVoir/Fitzgerald
SHORT TERM...DeVoir/Fitzgerald
LONG TERM...Martin
AVIATION...Ceru/RXR
HYDROLOGY...

Hazardous Weather Outlook
National Weather Service State College PA
1013 PM EDT Sun Apr 14 2019

PAZ006-011-012-017>019-024>028-033>035-037-041-042-045-046-049>053-
160215-
Potter-Cameron-Northern Clinton-Clearfield-Northern Centre-
Southern Centre-Cambria-Blair-Huntingdon-Mifflin-Juniata-Somerset-
Bedford-Fulton-Tioga-Northern Lycoming-Sullivan-Southern Clinton-
Southern Lycoming-Union-Snyder-Montour-Northumberland-Columbia-
1013 PM EDT Sun Apr 14 2019

...TORNADO WATCH 69 IN EFFECT UNTIL 3 AM EDT MONDAY...

This Hazardous Weather Outlook is for central Pennsylvania.

.DAY ONE...Tonight.

Please listen to NOAA Weather Radio or go to
weather.gov/StateCollege on the internet for more
information about the following hazards.

   Tornado Watch.

Heavy rain from thunderstorms may lead to isolated instances of
flooding.

.DAYS TWO THROUGH SEVEN...Monday through Saturday.

The probability for widespread hazardous weather is low.

.SPOTTER INFORMATION STATEMENT...

Spotters are encouraged to report significant hazardous weather.

PAZ036-056>059-063>066-160215-
Franklin-Perry-Dauphin-Schuylkill-Lebanon-Cumberland-Adams-York-
Lancaster-
1013 PM EDT Sun Apr 14 2019

...FLASH FLOOD WATCH IN EFFECT UNTIL 6 AM EDT MONDAY...
...TORNADO WATCH 69 IN EFFECT UNTIL 3 AM EDT MONDAY...

This Hazardous Weather Outlook is for central Pennsylvania.

.DAY ONE...Tonight.

Please listen to NOAA Weather Radio or go to
weather.gov/StateCollege on the internet for more
information about the following hazards.

   Tornado Watch.
   Flash Flood Watch.

.DAYS TWO THROUGH SEVEN...Monday through Saturday.

The probability for widespread hazardous weather is low.

.SPOTTER INFORMATION STATEMENT...

Spotters are encouraged to report significant hazardous weather.

PAZ004-005-010-160215-
Warren-McKean-Elk-
1013 PM EDT Sun Apr 14 2019

...FLASH FLOOD WATCH IN EFFECT UNTIL 2 AM EDT MONDAY...

This Hazardous Weather Outlook is for central Pennsylvania.

.DAY ONE...Tonight.

Please listen to NOAA Weather Radio or go to
weather.gov/StateCollege on the internet for more
information about the following hazards.

   Flash Flood Watch.

.DAYS TWO THROUGH SEVEN...Monday through Saturday.

The probability for widespread hazardous weather is low.

.SPOTTER INFORMATION STATEMENT...

Spotters are encouraged to report significant hazardous weather.

Special Weather Statement
National Weather Service State College PA
942 PM EDT SUN APR 14 2019

PAZ010-011-017-024-033-150230-
Cameron PA-Somerset PA-Clearfield PA-Cambria PA-Elk PA-
942 PM EDT SUN APR 14 2019

...STRONG THUNDERSTORMS WILL AFFECT PARTS OF ELK...CLEARFIELD...
SOMERSET...CAMERON...AND CAMBRIA COUNTIES UNTIL 1030 PM EDT...

At 941 PM EDT, Doppler radar indicated strong thunderstorms along a
line extending from Brockport to near Indiana. Movement was northeast
at 35 mph.

Pea size hail and wind gusts up to 50 mph are possible.

Locations impacted include...
Johnstown, DuBois, Somerset, Clearfield, Westmont, Windber,
Ebensburg, Belmont, Nanty-Glo, Portage, Sandy, Northern Cambria,
Woodland, Curwensville, Geistown, Southmont, Meyersdale, Berlin,
Patton and Cresson.

LAT...LON 3972 7939 3978 7939 3978 7935 3987 7941
      3990 7940 4009 7926 4012 7917 4041 7897
      4072 7880 4112 7880 4120 7876 4122 7865
      4125 7864 4124 7842 4138 7826 4122 7817
      3972 7896
TIME...MOT...LOC 0141Z 245DEG 30KT 4128 7875 4063 7919

Evanego

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE STATE COLLEGE PA
947 PM EDT SUN APR 14 2019

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0946 PM     TSTM WND DMG     BRADFORD                41.96N  78.64W
04/14/2019                   MCKEAN             PA   911 CALL CENTER

            MULTIPLE TREES DOWN IN THE CITY OF BRADFORD.

&&

EVENT NUMBER CTP1901177

JRB

PRELIMINARY LOCAL STORM REPORT...CORRECTED
NATIONAL WEATHER SERVICE STATE COLLEGE PA
1022 PM EDT SUN APR 14 2019

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0921 PM     TSTM WND DMG     BRADFORD                41.96N  78.64W
04/14/2019                   MCKEAN             PA   911 CALL CENTER

            MULTIPLE TREES DOWN IN THE CITY OF BRADFORD INCLUDING
            ON HALL ROAD.

&&

CORRECTED EVENT TIME...FATALITIES...INJURIES...REMARKS

EVENT NUMBER CTP1901177

JRB

Special Weather Statement
National Weather Service State College PA
1024 PM EDT SUN APR 14 2019

PAZ041-046-049-052-150300-
Southern Lycoming PA-Union PA-Northumberland PA-Northern Lycoming PA-
1024 PM EDT SUN APR 14 2019

...A STRONG THUNDERSTORM WILL AFFECT PARTS OF NORTHUMBERLAND...
LYCOMING...AND UNION COUNTIES UNTIL 1100 PM EDT...

At 1023 PM EDT, Doppler radar indicated a strong thunderstorm over
Montgomery, moving northeast at 40 mph.

Winds in excess of 40 mph are possible.

Locations impacted include...
Milton, Montoursville, Muncy, Watsontown, Hughesville, Montgomery,
New Columbia, Allenwood, Elimsport, Delaware Run, Barbours,
Turbotville, Picture Rocks, McEwensville and Williamsport Airport.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

This storm may intensify, so be certain to monitor local radio
stations and available television stations for additional information
and possible warnings from the National Weather Service.

&&

LAT...LON 4148 7677 4141 7675 4130 7659 4117 7671
      4117 7673 4115 7673 4103 7684 4112 7704
      4150 7679
TIME...MOT...LOC 0223Z 210DEG 60KT 4114 7689

RXR

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE STATE COLLEGE PA
1030 PM EDT SUN APR 14 2019

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0935 PM     TSTM WND DMG     ELDRED                  41.96N  78.38W
04/14/2019                   MCKEAN             PA   911 CALL CENTER

            TREE DOWN AT INTERSECTION OF WINDFALL ROAD, SMITH ROAD,
            AND LOOP ROAD.

&&

EVENT NUMBER CTP1901178

JRB

Special Weather Statement
National Weather Service State College PA
1031 PM EDT SUN APR 14 2019

PAZ006-010>012-017-018-037-150300-
Potter PA-Northern Centre PA-Northern Clinton PA-Cameron PA-
Clearfield PA-Tioga PA-Elk PA-
1031 PM EDT SUN APR 14 2019

...STRONG THUNDERSTORMS WILL AFFECT PARTS OF ELK...CLEARFIELD...
CENTRE...POTTER...CAMERON...TIOGA...AND CLINTON COUNTIES UNTIL 1100
PM EDT...

At 1031 PM EDT, Doppler radar indicated strong thunderstorms along a
line extending from Hartsville to near Coudersport. Movement was
northeast at 50 mph.

Wind gusts up to 50 mph are possible.

Locations impacted include...
DuBois, Cameron, Wharton, Keating, Philipsburg, Woodland,
Coudersport, Emporium, Elkland, Penfield, Renovo, Roulette, Galeton,
Westfield, Rockton, Chester Hill, Karthaus, Genesee, North
Philipsburg and Gaines.

LAT...LON 4154 7753 4154 7760 4145 7760 4087 7824
      4111 7847 4091 7880 4106 7880 4147 7834
      4162 7826 4162 7820 4172 7820 4200 7805
      4200 7726
TIME...MOT...LOC 0231Z 225DEG 43KT 4225 7773 4171 7808

Evanego