Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 138, NWS State College, PA

July 13, 2021Elk County, McKean County, Warren County, Pennsylvania

NWS State College, PA issued this severe thunderstorm warning at Jul 13, 2021, 5:23 PM EDT for Elk County, McKean County, Warren County, Pennsylvania. It was in force for 52 min. 1 report 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
Jul 13, 2021, 5:23 PM EDT (21:23 UTC)
Expired
Jul 13, 2021, 6:15 PM EDT
In force
52 min
Issued by
NWS State College, PA
Area
Storm-based polygon
Hail
0.75 in
Wind
60.0 mph

Counties Elk County, PA, McKean County, PA, Warren County, PA

The radar

The State College radar (KCCX), 109 km from the middle of the area, began a volume at 21:24 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

TimeReportWhereRemark
Jul 13, 5:45 PM EDTTSTM WND DMG2 Ese Ludlow, PAMULTIPLE TREES BLOCKING ROADWAY ALONG ROUTE 6.

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

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

IssuedProductOfficeLasted
Jul 13, 1:37 PM EDTSevere Thunderstorm WatchSPC10 hr

The nearest sounding before it

Buffalo Intl Airport, NY (KBUF), launched 12:00Z, 9.4 hours before the alert went out and 148 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-pSkew-T log-p diagram, Buffalo Intl Airport, NY at 12:00Z on 2021-07-13Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 610 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Buffalo Intl Airport, NY at 12:00Z on 2021-07-13The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 56 square meters per square second.193958Sfc1 km3 km6 km9 kmRMLM
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
610 J/kg
Mixed-layer CIN
-36 J/kg
Mixed-layer LCL
907 m above ground
0-6 km bulk shear
36 kt
0-1 km storm-relative helicity
56 m²/s²
0-3 km storm-relative helicity
90 m²/s²
Significant tornado parameter
0.1
Supercell composite
0.9

Open this sounding in Storm Lab

The text

As transmitted.

539 
WUUS51 KCTP 132123
SVRCTP
PAC047-083-123-132215-
/O.NEW.KCTP.SV.W.0138.210713T2123Z-210713T2215Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service State College PA
523 PM EDT Tue Jul 13 2021

The National Weather Service in State College PA has issued a

* Severe Thunderstorm Warning for...
  Northwestern Elk County in north central Pennsylvania...
  Eastern Warren County in north central Pennsylvania...
  McKean County in north central Pennsylvania...

* Until 615 PM EDT.

* At 523 PM EDT, severe thunderstorms were located along a line
  extending from near Russell to near Warren South to near Chapman
  State Park to 9 miles west of Sheffield to near Marienville, moving
  northeast at 45 mph.

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

  SOURCE...Radar indicated.

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

* Severe thunderstorms will be near...
  Warren and Russell around 530 PM EDT.
  Kane, James City, Kinzua Dam, Ludlow, Scandia, Wetmore and Wilcox 
  around 540 PM EDT.
  Marshburg and Westline around 550 PM EDT.
  Bradford, Cyclone, Rew and Kinzua Bridge State Park around 600 PM 
  EDT.

Other locations impacted by these severe thunderstorms include
Starbrick, Eldred, Mount Jewett, Lewis Run, Clarendon, Bradford
Airport and University Of Pittsburgh - Bradford.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4200 7820 4191 7821 4146 7871 4134 7891
      4137 7897 4135 7902 4134 7910 4141 7910
      4143 7906 4145 7906 4145 7898 4144 7896
      4162 7896 4163 7926 4169 7921 4179 7927
      4198 7922 4200 7920
TIME...MOT...LOC 2123Z 219DEG 53KT 4197 7918 4185 7921 4175 7915 4167
7922 4159 7911 4143 7903

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

Jurewicz

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 12, 8:26 PM EDTAreal Flood AdvisoryCTPTioga2 hr
Jul 12, 8:50 PM EDTAreal Flood AdvisoryCTPLycoming, Sullivan2 hr
Jul 12, 9:47 PM EDTAreal Flood AdvisoryCTPSullivan118 min
Jul 12, 11:21 PM EDTSpecial Weather StatementCTPYork24 min
Jul 12, 11:52 PM EDTSpecial Weather StatementCTPAdams, Lancaster, Lebanon, York23 min
Jul 13, 12:53 AM EDTSpecial Weather StatementCTPLebanon22 min
Jul 13, 1:31 AM EDTSpecial Weather StatementCTPSchuylkill29 min
Jul 13, 2:02 AM EDTSpecial Weather StatementCTPSchuylkill28 min
Jul 13, 12:39 PM EDTFlash Flood WatchCTPColumbia, Lycoming, Montour, Northumberland, Snyder, Sullivan and 2 more11 hr
Jul 13, 4:18 PM EDTSpecial Weather StatementCTPSomerset42 min
Jul 13, 4:31 PM EDTAreal Flood AdvisoryCTPTioga119 min
Jul 13, 4:34 PM EDTSevere Thunderstorm WarningCTPSomerset41 min
Jul 13, 4:35 PM EDTSevere Thunderstorm WarningCTPWarren55 min
Jul 13, 4:38 PM EDTAreal Flood AdvisoryCTPSomerset3 hr
Jul 13, 5:14 PM EDTSpecial Weather StatementCTPSomerset46 min
Jul 13, 5:35 PM EDTSpecial Weather StatementCTPClearfield40 min
Jul 13, 5:38 PM EDTSevere Thunderstorm WarningCTPBedford, Somerset41 min
Jul 13, 5:49 PM EDTSevere Thunderstorm WarningCTPCameron, Centre, Clearfield, Clinton, Potter56 min
Jul 13, 5:53 PM EDTSevere Thunderstorm WarningCTPCameron, Clearfield, Elk67 min
Jul 13, 5:56 PM EDTSpecial Weather StatementCTPClearfield34 min
Jul 13, 6:01 PM EDTSevere Thunderstorm WarningCTPBedford, Blair, Cambria, Clearfield59 min
Jul 13, 6:07 PM EDTSevere Thunderstorm WarningCTPClearfield, Elk38 min
Jul 13, 6:19 PM EDTSevere Thunderstorm WarningCTPMcKean, Potter41 min
Jul 13, 6:27 PM EDTSevere Thunderstorm WarningCTPSomerset37 min
Jul 13, 6:33 PM EDTSpecial Weather StatementCTPClearfield27 min
Jul 13, 6:35 PM EDTSpecial Weather StatementCTPHuntingdon40 min
Jul 13, 6:43 PM EDTSevere Thunderstorm WarningCTPClinton, Potter, Tioga47 min
Jul 13, 6:46 PM EDTSevere Thunderstorm WarningCTPBlair, Centre, Clearfield44 min
Jul 13, 6:46 PM EDTSevere Thunderstorm WarningCTPBlair, Huntingdon44 min
Jul 13, 6:54 PM EDTAreal Flood AdvisoryCTPCameron, Clearfield, Clinton3 hr
Jul 13, 6:59 PM EDTSevere Thunderstorm WarningCTPPotter61 min
Jul 13, 7:01 PM EDTSevere Thunderstorm WarningCTPCentre, Clinton44 min
Jul 13, 7:07 PM EDTSpecial Weather StatementCTPClinton23 min
Jul 13, 7:08 PM EDTSpecial Weather StatementCTPSomerset37 min
Jul 13, 7:16 PM EDTSevere Thunderstorm WarningCTPCentre, Huntingdon, Mifflin44 min
Jul 13, 7:26 PM EDTSevere Thunderstorm WarningCTPLycoming, Tioga64 min
Jul 13, 7:29 PM EDTAreal Flood AdvisoryCTPCentre, Clinton3 hr
Jul 13, 7:44 PM EDTSevere Thunderstorm WarningCTPClinton, Lycoming, Tioga61 min
Jul 13, 7:55 PM EDTFlash Flood WarningCTPLycoming, Tioga2 hr
Jul 13, 7:58 PM EDTAreal Flood AdvisoryCTPCentre, Clinton2 hr
Jul 13, 7:59 PM EDTSevere Thunderstorm WarningCTPCentre, Clinton, Mifflin, Snyder, Union46 min

Nearby

Severe Thunderstorm Warnings in Pennsylvania, 2021Every 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.