Alert archive / Pennsylvania / Special Weather Statements in 2018

Special Weather Statement, NWS State College, PA

August 1, 2018Lancaster County, Pennsylvania

NWS State College, PA issued this special weather statement at Aug 1, 2018, 10:34 PM EDT for Lancaster County, Pennsylvania. It was in force for 41 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: Aug 1, 2018, 10:34 PM EDT (02:34 UTC)
Expired: Aug 1, 2018, 11:15 PM EDT
In force: 41 min
Issued by: NWS State College, PA

County Lancaster County, PA

The radar

The Dover AFB radar (KDOX), 137 km from the middle of the area, began a volume at 02:34 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 00:00Z, 2.6 hours before the alert went out and 153 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: 883 J/kg
Mixed-layer CIN: -22 J/kg
Mixed-layer LCL: 1170 m above ground
0-6 km bulk shear: 45 kt
0-1 km storm-relative helicity: 111 m²/s²
0-3 km storm-relative helicity: 143 m²/s²
Significant tornado parameter: 0.4
Supercell composite: 4.2

Open this sounding in Storm Lab

The text

As transmitted.

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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 Aug 1, 10:32 PM EDT, 2 minutes earlier.

Area forecast discussion, Aug 1, 10:32 PM EDT, 2 minutes before

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Hazardous weather outlook, Aug 1, 10:12 AM EDT, 12 hours 22 minutes before

Hazardous Weather Outlook
National Weather Service State College PA
1012 AM EDT Wed Aug 1 2018

PAZ004-021415-
Warren-
1012 AM EDT Wed Aug 1 2018

This Hazardous Weather Outlook is for central Pennsylvania.

.DAY ONE...Today and Tonight.

The probability for widespread hazardous weather is low.

.DAYS TWO THROUGH SEVEN...Thursday through Tuesday.

The probability for widespread hazardous weather is low.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not expected at this time.

PAZ005-006-010-011-021415-
McKean-Potter-Elk-Cameron-
1012 AM EDT Wed Aug 1 2018

This Hazardous Weather Outlook is for central Pennsylvania.

.DAY ONE...Today and Tonight.

Strong to severe thunderstorms with damaging winds and heavy
downpours are possible this afternoon into the early evening.

.DAYS TWO THROUGH SEVEN...Thursday through Tuesday.

The probability for widespread hazardous weather is low.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not expected at this time.

PAZ027-028-036-042-046-049>053-056>059-063>066-021415-
Mifflin-Juniata-Franklin-Sullivan-Southern Lycoming-Union-Snyder-
Montour-Northumberland-Columbia-Perry-Dauphin-Schuylkill-Lebanon-
Cumberland-Adams-York-Lancaster-
1012 AM EDT Wed Aug 1 2018

...FLASH FLOOD WATCH IN EFFECT THROUGH FRIDAY MORNING...

This Hazardous Weather Outlook is for central Pennsylvania.

.DAY ONE...Today and Tonight.

Strong to severe thunderstorms with damaging winds are possible this
afternoon into the early evening.

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...Thursday through Tuesday.

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.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not expected at this time.

PAZ012-017>019-024>026-033>035-037-041-045-021415-
Northern Clinton-Clearfield-Northern Centre-Southern Centre-Cambria-
Blair-Huntingdon-Somerset-Bedford-Fulton-Tioga-Northern Lycoming-
Southern Clinton-
1012 AM EDT Wed Aug 1 2018

...FLASH FLOOD WATCH IN EFFECT THROUGH FRIDAY MORNING...

This Hazardous Weather Outlook is for central Pennsylvania.

.DAY ONE...Today and Tonight.

Strong to severe thunderstorms with damaging winds are possible this
afternoon into the early evening.

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...Thursday through Tuesday.

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.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not expected at this time.

In the hours before

Special weather statement, Aug 1, 5:56 PM EDT, 4 hours 38 minutes before

Special Weather Statement
National Weather Service State College PA
556 PM EDT WED AUG 1 2018

PAZ026-035-012230-
Fulton PA-Huntingdon PA-
556 PM EDT WED AUG 1 2018

...SPECIAL WEATHER STATEMENT...

At 555 PM EDT, Doppler radar indicated strong thunderstorms along a
line extending from Waterfall to near Warfordsburg. Movement was east
at 30 mph.

Winds in excess of 30 mph are possible.

Strong thunderstorms will be near...
  Waterfall, Fort Littleton and Sideling Hill Rest Area around 600
  PM EDT.
  Big Cove Tannery around 615 PM EDT.
  McConnellsburg around 625 PM EDT.

Other locations impacted by these storms include Three Springs.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3972 7837 3983 7829 3991 7827 4001 7820
      4004 7820 4005 7818 4007 7820 4011 7818
      4012 7816 4016 7814 4021 7794 4009 7784
      4001 7792 3982 7801 3973 7809
TIME...MOT...LOC 2155Z 253DEG 28KT 4012 7805 3979 7824

Colbert

Special weather statement, Aug 1, 6:40 PM EDT, 3 hours 54 minutes before

Special Weather Statement
National Weather Service State College PA
640 PM EDT WED AUG 1 2018

PAZ036-056-063-012315-
Perry PA-Franklin PA-Cumberland PA-
640 PM EDT WED AUG 1 2018

...SPECIAL WEATHER STATEMENT...

At 638 PM EDT, Doppler radar indicated strong thunderstorms along a
line extending from near Loysville to near Berkeley Springs. Movement
was east at 30 mph.

Winds in excess of 30 mph are possible.

Strong thunderstorms will be near...
  Loysville and Ickesburg around 645 PM EDT.
  Claylick around 705 PM EDT.
  Greencastle and Marion around 715 PM EDT.

Other locations impacted by these storms include Orrstown,
Williamson, State Line, Landisburg and Blain.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3973 7808 4024 7774 4035 7759 4038 7753
      4041 7753 4054 7724 4031 7724 4011 7750
      3972 7763
TIME...MOT...LOC 2238Z 249DEG 34KT 4036 7739 3962 7816

Colbert

Special weather statement, Aug 1, 8:14 PM EDT, 2 hours 20 minutes before

Special Weather Statement
National Weather Service State College PA
814 PM EDT WED AUG 1 2018

PAZ056-057-063-020045-
Perry PA-Cumberland PA-Dauphin PA-
814 PM EDT WED AUG 1 2018

...A STRONG THUNDERSTORM WILL AFFECT PARTS OF DAUPHIN...PERRY...AND
CUMBERLAND COUNTIES UNTIL 845 PM EDT...

At 813 PM EDT, Doppler radar indicated a strong thunderstorm over
Duncannon, moving northeast at 40 mph.

Winds in excess of 40 mph are possible.

Locations impacted include...
Harrisburg, Linglestown, Enola, Millersburg, Marysville, Lykens,
Duncannon, Elizabethville, Williamstown, New Bloomfield, New
Kingstown, New Buffalo, Klingerstown, Hogestown, Dehart Dam,
Wertzville, Rockville, Shermansdale, Fort Indiantown Gap and
Wiconisco.

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 4020 7711 4041 7721 4063 7686 4062 7684
      4065 7680 4064 7679 4065 7675 4066 7670
      4056 7654 4048 7668 4041 7665
TIME...MOT...LOC 0013Z 237DEG 40KT 4036 7704

RXR

Special weather statement, Aug 1, 9:00 PM EDT, 1 hour 34 minutes before

Special Weather Statement
National Weather Service State College PA
900 PM EDT WED AUG 1 2018

PAZ057>059-020145-
Lebanon PA-Dauphin PA-Schuylkill PA-
900 PM EDT WED AUG 1 2018

...A STRONG THUNDERSTORM WILL AFFECT PARTS OF SCHUYLKILL...DAUPHIN...
AND LEBANON COUNTIES UNTIL 945 PM EDT...

At 856 PM EDT, Doppler radar indicated a strong thunderstorm near
Dehart Dam, moving northeast at 35 mph.

Winds in excess of 40 mph are possible. Combined with saturated
soil, this may cause a few trees to be knocked down.

Locations impacted include...
Lebanon, Pottsville, Hershey, Colonial Park, Progress, Middletown,
Palmyra, Linglestown, Steelton, Schuylkill Haven, Shenandoah,
Annville, Hummelstown, Minersville, Mahanoy City, Cornwall,
Frackville, Myerstown, St. Clair and Ashland.

LAT...LON 4052 7626 4052 7634 4049 7644 4032 7615
      4025 7631 4024 7644 4019 7661 4012 7674
      4017 7675 4020 7682 4061 7691 4065 7680
      4066 7671 4085 7617 4058 7605
TIME...MOT...LOC 0056Z 240DEG 31KT 4051 7670

RXR

Special weather statement, Aug 1, 9:36 PM EDT, 58 minutes before

Special Weather Statement
National Weather Service State College PA
936 PM EDT WED AUG 1 2018

PAZ058-020215-
Schuylkill PA-
936 PM EDT WED AUG 1 2018

...A STRONG THUNDERSTORM WILL AFFECT PARTS OF SCHUYLKILL COUNTY UNTIL
1015 PM EDT...

At 935 PM EDT, Doppler radar indicated a strong thunderstorm over
Coaldale, moving east at 40 mph.

Winds in excess of 40 mph are possible.

This strong thunderstorm will be near...
  McKeansburg around 940 PM EDT.
  Tuscarora, Grier City-Park Crest and Delano around 945 PM EDT.
  Tamaqua, Hometown and Mcadoo around 950 PM EDT.
  Snyders around 955 PM EDT.

Other locations impacted by this storm include Mary-D, Park Place,
Port Clinton, Ringtown and Deer Lake.

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.

Turn around don't drown.

&&

LAT...LON 4070 7581 4063 7600 4058 7601 4058 7604
      4057 7605 4085 7617 4081 7630 4089 7628
      4095 7621 4090 7604 4091 7600 4081 7589
      4073 7576
TIME...MOT...LOC 0135Z 247DEG 36KT 4074 7615

Colbert

Special weather statement, Aug 1, 10:34 PM EDT, 0 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 1, 8:14 PM EDT	Special Weather Statement	CTP	Dauphin	31 min
Aug 1, 9:00 PM EDT	Special Weather Statement	CTP	Dauphin, Lebanon, Schuylkill	45 min
Aug 1, 9:16 PM EDT	Areal Flood Advisory	CTP	Lycoming, Sullivan	3 hr
Aug 1, 9:36 PM EDT	Special Weather Statement	CTP	Schuylkill	39 min
Aug 1, 9:55 PM EDT	Flash Flood Warning	CTP	Lycoming	3 hr
Aug 2, 12:19 PM EDT	Special Weather Statement	CTP	Lancaster	56 min
Aug 2, 1:16 PM EDT	Special Weather Statement	CTP	Lancaster	14 min
Aug 2, 4:44 PM EDT	Areal Flood Advisory	CTP	Lancaster, York	3 hr

Nearby

Special Weather Statements in Pennsylvania, 2018 Every special weather statement in 2018

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.