Alert archive / Pennsylvania / Special Weather Statements in 2021

Special Weather Statement, NWS State College, PA

August 10, 2021Dauphin County, Lebanon County, Pennsylvania

NWS State College, PA issued this special weather statement at Aug 10, 2021, 2:21 PM EDT for Dauphin County, Lebanon County, Pennsylvania. It was in force for 24 min. 2 reports came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued: Aug 10, 2021, 2:21 PM EDT (18:21 UTC)
Expired: Aug 10, 2021, 2:45 PM EDT
In force: 24 min
Issued by: NWS State College, PA
Hail: 0.00 in
Wind: 55

Counties Dauphin County, PA, Lebanon County, PA

The radar

The State College radar (KCCX), 132 km from the middle of the area, began a volume at 18:23 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.

What was reported inside it

Time	Report	Where	Remark
Aug 10, 2:30 PM EDT	TSTM WND DMG	2 N Dauphin, PA	MULTIPLE TREES SNAPPED AND UPROOTED.
Aug 10, 2:35 PM EDT	TSTM WND DMG	2 Wnw Ellendale Forge, PA	TREES DOWN ON CLARKS VALLEY RD.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Washington/Dulle, VA (KIAD), launched 12:00Z, 6.4 hours before the alert went out and 175 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: 529 J/kg
Mixed-layer CIN: -120 J/kg
Mixed-layer LCL: 1096 m above ground
0-6 km bulk shear: 14 kt
0-1 km storm-relative helicity: 37 m²/s²
0-3 km storm-relative helicity: 65 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

868 
WWUS81 KCTP 101821
SPSCTP

Special Weather Statement
National Weather Service State College PA
221 PM EDT Tue Aug 10 2021
 
PAZ057-059-101845-
Lebanon PA-Dauphin PA-
221 PM EDT Tue Aug 10 2021

...A strong thunderstorm will impact portions of central Dauphin and
western Lebanon Counties through 245 PM EDT...

At 221 PM EDT, Doppler radar was tracking a strong thunderstorm near
Dehart Dam, moving east at 30 mph.

HAZARD...Wind gusts of 50 to 55 mph.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around 
         unsecured objects.

Locations impacted include...
Lebanon, Hershey, Palmyra, Linglestown, Annville, Skyline View,
Campbelltown, Pleasant Hill, Sand Hill, Cleona, Elizabethville,
Fredericksburg, Timber Hills, Harper Tavern, Lickdale, Fort
Indiantown Gap, Penn National Race Course, Dehart Dam, Jonestown and
Dauphin.

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 4024 7648 4038 7694 4056 7687 4051 7646
      4047 7639
TIME...MOT...LOC 1821Z 285DEG 25KT 4045 7681 

MAX HAIL SIZE...0.00 IN
MAX WIND GUST...55 MPH

$$

Dangelo

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 10, 12:55 PM EDT	Heat Advisory	CTP	Adams, Columbia, Cumberland, Dauphin, Franklin, Juniata and 10 more	30 hr
Aug 10, 12:55 PM EDT	Heat Advisory	CTP	Adams, Bedford, Blair, Centre, Clinton, Columbia and 19 more	54 hr
Aug 10, 2:32 PM EDT	Severe Thunderstorm Warning	CTP	Dauphin, Lebanon	43 min
Aug 10, 3:12 PM EDT	Special Weather Statement	CTP	Bedford, Blair, Cambria, Somerset	33 min
Aug 10, 3:23 PM EDT	Special Weather Statement	CTP	Berks	37 min
Aug 10, 3:25 PM EDT	Special Weather Statement	CTP	Huntingdon, Juniata	50 min
Aug 10, 3:28 PM EDT	Special Weather Statement	CTP	Schuylkill	47 min
Aug 10, 4:14 PM EDT	Special Weather Statement	CTP	Juniata	31 min
Aug 10, 4:31 PM EDT	Special Weather Statement	CTP	Centre	29 min
Aug 10, 4:48 PM EDT	Special Weather Statement	CTP	Perry	27 min
Aug 10, 5:18 PM EDT	Special Weather Statement	CTP	Dauphin	42 min
Aug 10, 5:50 PM EDT	Special Weather Statement	CTP	Adams	40 min
Aug 10, 5:52 PM EDT	Special Weather Statement	CTP	Lebanon	38 min
Aug 10, 6:12 PM EDT	Special Weather Statement	CTP	Lancaster	63 min
Aug 10, 6:17 PM EDT	Severe Thunderstorm Warning	CTP	Lancaster, Lebanon	73 min
Aug 10, 6:29 PM EDT	Severe Thunderstorm Warning	CTP	Lancaster, York	58 min
Aug 10, 7:00 PM EDT	Severe Thunderstorm Warning	CTP	Lancaster, York	75 min
Aug 10, 7:33 PM EDT	Areal Flood Advisory	CTP	Lancaster	2 hr

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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.