Alert archive / Pennsylvania / Special Weather Statements in 2021

Special Weather Statement, NWS State College, PA

July 19, 2021Montour County, Pennsylvania

NWS State College, PA issued this special weather statement at Jul 19, 2021, 5:22 PM EDT for Montour County, Pennsylvania. It was in force for 23 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Jul 19, 2021, 5:22 PM EDT (21:22 UTC)
Expired: Jul 19, 2021, 5:45 PM EDT
In force: 23 min
Issued by: NWS State College, PA

County Montour County, PA

The radar

The State College radar (KCCX), 99 km from the middle of the area, began a volume at 21:23 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 nearest sounding before it

Washington/Dulle, VA (KIAD), launched 12:00Z, 9.4 hours before the alert went out and 242 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 1473 m above ground
0-6 km bulk shear: 12 kt
0-1 km storm-relative helicity: -63 m²/s²
0-3 km storm-relative helicity: -32 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

248 
WWUS81 KCTP 192122
SPSCTP

Special Weather Statement
National Weather Service State College PA
522 PM EDT Mon Jul 19 2021
 
PAZ049-052-192145-
Union PA-Northumberland PA-
522 PM EDT Mon Jul 19 2021

...A STRONG THUNDERSTORM WILL AFFECT PARTS OF UNION AND
NORTHUMBERLAND COUNTIES UNTIL 545 PM EDT...

At 521 PM EDT, Doppler radar indicated a strong thunderstorm over
Allenwood, moving southeast at 20 mph.

Very heavy rain is expected.
Pea size hail and wind gusts of 50 to 55 mph are possible.

Locations impacted include...
Milton, Lewisburg, Watsontown, New Columbia, Allenwood, Delaware Run,
West Milton and McEwensville.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Minor flooding may develop. Do not drive into water covering the
roadway.

&&

LAT...LON 4105 7676 4101 7678 4096 7692 4113 7696
      4114 7693 4114 7690 4116 7688 4116 7686
      4106 7675
TIME...MOT...LOC 2121Z 334DEG 15KT 4111 7689 

$$

Banghoff

What forecasters said that day

The local office's own words before this special weather statement went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS State College, PA wrote its last area forecast discussion before this special weather statement went out at Jul 19, 2:16 PM EDT, 3 hours 6 minutes earlier.

Area forecast discussion, Jul 19, 2:16 PM EDT, 3 hours 6 minutes before

Area Forecast Discussion
National Weather Service State College PA
216 PM EDT Mon Jul 19 2021

.SYNOPSIS...
A mid and upper level trough extending from Southern Quebec
Canada into Eastern PA will create a northwesterly flow of dry
but much warmer air today and Tuesday.

A few weak weather systems will move across the area today and
Tuesday bringing a chance for a few showers across northern PA
and perhaps even a thunderstorm.

This trough is forecast to linger over the area for much of the
week, bringing a much drier week and less humidity then
previous weeks.

&&

.NEAR TERM /THROUGH TONIGHT/...
North to south moving showers are affecting the eastern forecast
area this afternoon...generally along a Route 15 line. A few
lightning strikes have occurred in Lycoming county. Expect these
to continue through the daylight hours, remaining generally east
of a Coudersport to State College to Breezewood line. The
showers are moving quickly so do not expect any water issues in
Tioga county with their low FFG values.

After the showers and clouds diminish this evening, look for
partly cloudy skies areawide along with a trend to
light/variable wind that will help to produce patchy valley fog
once again with little impact.

&&

.SHORT TERM /TUESDAY/...
Tuesday should be the warmest and most humid day off the week
with just a slight chance of a mid to late afternoon shower or
thunderstorms across the northern tier counties of the state.

&&

.LONG TERM /TUESDAY NIGHT THROUGH SUNDAY/...
Persistent upper-level troughing with a mean west-northwest
flow aloft will bring a series of shortwaves and associated cold
fronts across central PA from the midweek into next weekend.
The first of these shortwaves is projected to pass through early
Wednesday, with additional shortwave passages expected Friday
and again next Sunday.

Each shortwave will be accompanied by a chance of showers and
thunderstorms, but lower PWATs (available deep moisture) than
we've seen lately should keep the probability of heavy rainfall
relatively low. Latest guidance supports seasonably warm
temperatures through next weekend.

&&

.AVIATION /18Z MONDAY THROUGH SATURDAY/...
Generally VFR conds will persist this aftn under a hazy sky. A
few showers or storms are possible, mainly along and east of
the Susq Valley. A northwesterly breeze of 5-10 kts is expected.

Clearing skies and diminishing winds will likely lead to patchy
valley fog once again tonight. Hinted at this possibility in
the TAFs.

Any valley fog will quickly burn off Tuesday morning, leaving
widespread VFR conds under a hazy sky. A stray late-day shower
or storm is possible across far northern PA.

Outlook...

Wed...Scattered SHRA and PM TSRA.
Thurs...Generally VFR.
Fri...Scattered PM SHRA/TSRA.
Sat...Generally VFR.

&&

.CTP WATCHES/WARNINGS/ADVISORIES...
None.

&&

SYNOPSIS...Lambert
NEAR TERM...Tyburski
SHORT TERM...Lambert/Tyburski
LONG TERM...Evanego
AVIATION...Evanego

Hazardous weather outlook, Jul 19, 4:35 AM EDT, 12 hours 47 minutes before

Hazardous Weather Outlook
National Weather Service State College PA
435 AM EDT Mon Jul 19 2021

PAZ004>006-010>012-017>019-024>028-033>037-041-042-045-046-049>053-
056>059-063>066-200845-
Warren-McKean-Potter-Elk-Cameron-Northern Clinton-Clearfield-
Northern Centre-Southern Centre-Cambria-Blair-Huntingdon-Mifflin-
Juniata-Somerset-Bedford-Fulton-Franklin-Tioga-Northern Lycoming-
Sullivan-Southern Clinton-Southern Lycoming-Union-Snyder-Montour-
Northumberland-Columbia-Perry-Dauphin-Schuylkill-Lebanon-Cumberland-
Adams-York-Lancaster-
435 AM EDT Mon Jul 19 2021

This Hazardous Weather Outlook is for central Pennsylvania.

.DAY ONE...Today and tonight.

No hazardous weather is expected at this time.

.DAYS TWO THROUGH SEVEN...Tuesday through Sunday.

The probability for widespread hazardous weather is low.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not expected at this time.

In the hours before

Special weather statement, Jul 19, 5:01 PM EDT, 21 minutes before

Special Weather Statement
National Weather Service State College PA
501 PM EDT Mon Jul 19 2021

PAZ037-041-192115-
Northern Lycoming PA-Tioga PA-
501 PM EDT Mon Jul 19 2021

...A STRONG THUNDERSTORM WILL AFFECT PARTS OF NORTHERN LYCOMING AND
TIOGA COUNTIES UNTIL 515 PM EDT...

At 500 PM EDT, Doppler radar indicated a strong thunderstorm near
Morris, moving south at 20 mph.

Very heavy rain is expected.
Pea size hail and wind gusts of 50 to 55 mph are possible.

Locations impacted include...
English Center and Ski Sawmill Ski Area.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Torrential rainfall is also occurring with this storm, and may lead
to localized flooding. Do not drive your vehicle through flooded
roadways.

&&

LAT...LON 4161 7730 4162 7718 4143 7715 4144 7736
TIME...MOT...LOC 2100Z 009DEG 19KT 4156 7725

Banghoff

Special weather statement, Jul 19, 5:02 PM EDT, 20 minutes before

Special Weather Statement
National Weather Service State College PA
502 PM EDT Mon Jul 19 2021

PAZ046-049-052-192115-
Southern Lycoming PA-Union PA-Northumberland PA-
502 PM EDT Mon Jul 19 2021

...A STRONG THUNDERSTORM WILL AFFECT PARTS OF SOUTHERN LYCOMING...
UNION...AND NORTHUMBERLAND COUNTIES UNTIL 515 PM EDT...

At 502 PM EDT, Doppler radar indicated a strong thunderstorm over
Montgomery, moving south at 20 mph.

Pea size hail and wind gusts of 50 to 55 mph are possible.

Locations impacted include...
Montoursville, Muncy, Watsontown, Montgomery, Allenwood, Delaware
Run, Turbotville and McEwensville.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Minor flooding may develop. Do not drive into water covering the
roadway.

&&

LAT...LON 4125 7677 4105 7675 4105 7676 4107 7697
      4126 7689
TIME...MOT...LOC 2102Z 009DEG 19KT 4120 7685

Banghoff

Special weather statement, Jul 19, 5:10 PM EDT, 12 minutes before

Special Weather Statement
National Weather Service State College PA
510 PM EDT Mon Jul 19 2021

PAZ028-050-056-192130-
Perry PA-Juniata PA-Snyder PA-
510 PM EDT Mon Jul 19 2021

...A STRONG THUNDERSTORM WILL AFFECT PARTS OF PERRY...JUNIATA...AND
SNYDER COUNTIES UNTIL 530 PM EDT...

At 510 PM EDT, Doppler radar indicated a strong thunderstorm near
Richfield, moving south at 20 mph.

Very heavy rain is expected.
Pea size hail and wind gusts of 50 to 55 mph are possible.

Locations impacted include...
Richfield, Thompsontown, Millerstown and East Salem.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Minor flooding may develop. Do not drive into water covering the
roadway.

&&

LAT...LON 4072 7726 4075 7713 4058 7705 4052 7726
TIME...MOT...LOC 2110Z 346DEG 19KT 4067 7719

Banghoff

Special weather statement, Jul 19, 5:14 PM EDT, 8 minutes before

Special Weather Statement
National Weather Service State College PA
514 PM EDT Mon Jul 19 2021

PAZ053-058-192145-
Columbia PA-Schuylkill PA-
514 PM EDT Mon Jul 19 2021

...A STRONG THUNDERSTORM WILL AFFECT PARTS OF COLUMBIA AND SCHUYLKILL
COUNTIES UNTIL 545 PM EDT...

At 513 PM EDT, Doppler radar indicated a strong thunderstorm over
Mifflinville, moving south at 20 mph.

Very heavy rain is expected.
Pea size hail and wind gusts of 50 to 55 mph are possible.

Locations impacted include...
Berwick, Mifflinville, Almedia, Oneida, Nuremburg, Sheppton,
Mainville, Shumans, Lime Ridge, Briar Creek and Weston.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Minor flooding may develop. Do not drive into water covering the
roadway.

&&

LAT...LON 4082 7638 4110 7637 4112 7627 4107 7623
      4103 7623 4095 7621 4093 7611 4091 7609
TIME...MOT...LOC 2113Z 346DEG 19KT 4105 7632

Banghoff

Special weather statement, Jul 19, 5:20 PM EDT, 2 minutes before

Special Weather Statement
National Weather Service State College PA
520 PM EDT Mon Jul 19 2021

PAZ041-045-046-192145-
Southern Lycoming PA-Southern Clinton PA-Northern Lycoming PA-
520 PM EDT Mon Jul 19 2021

...A STRONG THUNDERSTORM WILL AFFECT PARTS OF SOUTHERN LYCOMING...
SOUTHERN CLINTON...AND NORTHERN LYCOMING COUNTIES UNTIL 545 PM EDT...

At 520 PM EDT, Doppler radar indicated a strong thunderstorm over
Jersey Shore, moving south at 15 mph.

Pea size hail and wind gusts of 50 to 55 mph are possible.

Locations impacted include...
Jersey Shore, Avis, McElhattan, Oval and Salladasburg.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Minor flooding may develop. Do not drive into water covering the
roadway.

&&

LAT...LON 4128 7718 4112 7714 4110 7736 4121 7735
      4122 7732 4122 7735 4129 7735
TIME...MOT...LOC 2120Z 358DEG 15KT 4122 7728

Banghoff

Special weather statement, Jul 19, 5:22 PM EDT, 0 minutes before

Special Weather Statement
National Weather Service State College PA
522 PM EDT Mon Jul 19 2021

PAZ049-052-192145-
Union PA-Northumberland PA-
522 PM EDT Mon Jul 19 2021

...A STRONG THUNDERSTORM WILL AFFECT PARTS OF UNION AND
NORTHUMBERLAND COUNTIES UNTIL 545 PM EDT...

At 521 PM EDT, Doppler radar indicated a strong thunderstorm over
Allenwood, moving southeast at 20 mph.

Very heavy rain is expected.
Pea size hail and wind gusts of 50 to 55 mph are possible.

Locations impacted include...
Milton, Lewisburg, Watsontown, New Columbia, Allenwood, Delaware Run,
West Milton and McEwensville.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Minor flooding may develop. Do not drive into water covering the
roadway.

&&

LAT...LON 4105 7676 4101 7678 4096 7692 4113 7696
      4114 7693 4114 7690 4116 7688 4116 7686
      4106 7675
TIME...MOT...LOC 2121Z 334DEG 15KT 4111 7689

Banghoff

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 19, 3:52 PM EDT	Special Weather Statement	CTP	Dauphin	23 min
Jul 19, 4:02 PM EDT	Special Weather Statement	CTP	Snyder	13 min
Jul 19, 4:15 PM EDT	Areal Flood Advisory	CTP	Cumberland, Dauphin, Perry	2 hr
Jul 19, 4:18 PM EDT	Special Weather Statement	CTP	Dauphin	27 min
Jul 19, 4:24 PM EDT	Special Weather Statement	CTP	Union	21 min
Jul 19, 4:32 PM EDT	Special Weather Statement	CTP	Lycoming	13 min
Jul 19, 4:46 PM EDT	Special Weather Statement	CTP	Lycoming	29 min
Jul 19, 4:57 PM EDT	Areal Flood Advisory	CTP	Lycoming, Tioga	2 hr
Jul 19, 5:01 PM EDT	Special Weather Statement	CTP	Lycoming	14 min
Jul 19, 5:02 PM EDT	Special Weather Statement	CTP	Montour	13 min
Jul 19, 5:10 PM EDT	Special Weather Statement	CTP	Snyder	20 min
Jul 19, 5:14 PM EDT	Special Weather Statement	CTP	Columbia	31 min
Jul 19, 5:20 PM EDT	Special Weather Statement	CTP	Lycoming	25 min
Jul 19, 5:31 PM EDT	Special Weather Statement	CTP	Snyder	14 min
Jul 19, 5:41 PM EDT	Special Weather Statement	CTP	Snyder	19 min
Jul 19, 5:43 PM EDT	Special Weather Statement	CTP	Union	17 min
Jul 19, 5:46 PM EDT	Special Weather Statement	CTP	Clinton	14 min
Jul 19, 5:58 PM EDT	Special Weather Statement	CTP	Union	32 min
Jul 19, 6:16 PM EDT	Special Weather Statement	CTP	Tioga	14 min
Jul 19, 6:20 PM EDT	Special Weather Statement	CTP	Mifflin	25 min
Jul 19, 6:24 PM EDT	Special Weather Statement	CTP	Snyder	21 min
Jul 19, 6:38 PM EDT	Special Weather Statement	CTP	Clinton	22 min
Jul 19, 6:44 PM EDT	Special Weather Statement	CTP	Juniata	31 min
Jul 19, 6:46 PM EDT	Severe Thunderstorm Warning	CTP	Centre, Mifflin	29 min
Jul 19, 6:58 PM EDT	Special Weather Statement	CTP	Centre	17 min
Jul 19, 7:05 PM EDT	Special Weather Statement	CTP	Mifflin	10 min
Jul 19, 7:15 PM EDT	Special Weather Statement	CTP	Mifflin	30 min
Jul 19, 7:42 PM EDT	Special Weather Statement	CTP	Mifflin	18 min

Nearby

Special Weather Statements in Pennsylvania, 2021 Every special weather statement in 2021

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.