Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 184, NWS State College, PA

July 19, 2021Centre County, Mifflin County, Pennsylvania

NWS State College, PA issued this severe thunderstorm warning at Jul 19, 2021, 6:46 PM EDT for Centre County, Mifflin County, Pennsylvania. It was in force for 29 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, 6:46 PM EDT (22:46 UTC)
Expired: Jul 19, 2021, 7:15 PM EDT
In force: 29 min
Issued by: NWS State College, PA
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Centre County, PA, Mifflin County, PA

The radar

The State College radar (KCCX), 50 km from the middle of the area, began a volume at 22:46 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, 10.8 hours before the alert went out and 202 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.

779 
WUUS51 KCTP 192246
SVRCTP
PAC027-087-192315-
/O.NEW.KCTP.SV.W.0184.210719T2246Z-210719T2315Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service State College PA
646 PM EDT Mon Jul 19 2021

The National Weather Service in State College PA has issued a

* Severe Thunderstorm Warning for...
  Northeastern Mifflin County in central Pennsylvania...
  Southeastern Centre County in central Pennsylvania...

* Until 715 PM EDT.

* At 646 PM EDT, a severe thunderstorm was located over Poe Valley
  State Park, moving south at 10 mph.

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

  SOURCE...Radar indicated.

  IMPACT...Hail damage to vehicles is expected. Expect wind damage 
           to roofs, siding, and trees.

* Locations impacted include...
  Coburn, Belltown, Poe Valley State Park, Reeds Gap State Park and
  Siglerville.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

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

&&

LAT...LON 4086 7756 4088 7743 4071 7735 4070 7735
      4069 7734 4067 7755
TIME...MOT...LOC 2246Z 351DEG 9KT 4079 7749 

HAIL...1.00IN
WIND...60MPH
 
$$

Banghoff

1 follow-up statement

674 
WWUS51 KCTP 192312
SVSCTP

Severe Weather Statement
National Weather Service State College PA
712 PM EDT Mon Jul 19 2021

PAC027-087-192322-
/O.EXP.KCTP.SV.W.0184.000000T0000Z-210719T2315Z/
Mifflin PA-Centre PA-
712 PM EDT Mon Jul 19 2021

...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN MIFFLIN AND
SOUTHEASTERN CENTRE COUNTIES WILL EXPIRE AT 715 PM EDT...
                
The storm which prompted the warning has weakened below severe 
limits, and no longer poses an immediate threat to life or property.
Therefore, the warning will be allowed to expire.  However small 
hail and gusty winds are still possible with this thunderstorm, 
especially between Potters Mills and Poe Valley State Park. Heavy 
rain is still possible for the entire warned area.

LAT...LON 4086 7756 4088 7743 4071 7735 4070 7735
      4069 7734 4067 7755
TIME...MOT...LOC 2312Z 351DEG 9KT 4073 7748 

$$

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, 5:22 PM EDT	Special Weather Statement	CTP	Montour	23 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, 6:58 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

Severe Thunderstorm Warnings in Pennsylvania, 2021 Every severe thunderstorm warning 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.