Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2017

Severe Thunderstorm Warning 31, NWS Cleveland, OH

April 20, 2017Erie County, Pennsylvania

NWS Cleveland, OH issued this severe thunderstorm warning at Apr 20, 2017, 6:37 PM EDT for Erie County, Pennsylvania. It was in force for 38 min. 3 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: Apr 20, 2017, 6:37 PM EDT (22:37 UTC)
Expired: Apr 20, 2017, 7:15 PM EDT
In force: 38 min
Issued by: NWS Cleveland, OH
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

County Erie County, PA

The radar

The Buffalo radar (KBUF), 143 km from the middle of the area, began a volume at 22:36 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
Apr 20, 6:49 PM EDT	HAIL 1	1 N Union City, PA	GAS STATION ATTENDANT ESTIMATED QUARTER SIZED HAIL JUST NORTH OF UNION CITY.
Apr 20, 7:00 PM EDT	HAIL 0.88	Corry, PA
Apr 20, 7:10 PM EDT	HAIL 1	Corry, PA	A MEMBER OF THE PUBLIC POSTED ON SOCIAL MEDIA A PHOTO OF QUARTER SIZED HAIL IN CORRY.

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

The nearest sounding before it

Buffalo Intl Airport, NY (KBUF), launched 12:00Z, 10.6 hours before the alert went out and 144 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: 586 m above ground
0-6 km bulk shear: 48 kt
0-1 km storm-relative helicity: 133 m²/s²
0-3 km storm-relative helicity: 258 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

001 
WUUS51 KCLE 202237
SVRCLE
PAC049-202315-
/O.NEW.KCLE.SV.W.0031.170420T2237Z-170420T2315Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Cleveland OH
637 PM EDT THU APR 20 2017

The National Weather Service in Cleveland has issued a

* Severe Thunderstorm Warning for...
  Southeastern Erie County in northwestern Pennsylvania...

* Until 715 PM EDT

* At 637 PM EDT, a severe thunderstorm was located near Waterford, or
  18 miles northeast of Meadville, moving east at 30 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...
  Corry, Union City, Waterford, Mill Village and Elgin. 

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 4185 8004 4191 8007 4201 7977 4200 7975
      4200 7962 4199 7961 4185 7962
TIME...MOT...LOC 2237Z 252DEG 24KT 4187 7995 

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

Mottice

3 follow-up statements

046 
WWUS51 KCLE 202249
SVSCLE

Severe Weather Statement
National Weather Service Cleveland OH
649 PM EDT THU APR 20 2017

PAC049-202315-
/O.CON.KCLE.SV.W.0031.000000T0000Z-170420T2315Z/
Erie PA-
649 PM EDT THU APR 20 2017

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 715 PM EDT
FOR SOUTHEASTERN ERIE COUNTY...

At 648 PM EDT, a severe thunderstorm was located over Union City, or
21 miles southeast of Erie, moving east at 30 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...
Corry, Union City and Elgin. 

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 4185 7988 4195 7994 4201 7977 4200 7975
      4200 7962 4199 7961 4185 7962
TIME...MOT...LOC 2248Z 252DEG 24KT 4189 7985 

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

Mottice

546 
WWUS51 KCLE 202302
SVSCLE

Severe Weather Statement
National Weather Service Cleveland OH
702 PM EDT THU APR 20 2017

PAC049-202315-
/O.CON.KCLE.SV.W.0031.000000T0000Z-170420T2315Z/
Erie PA-
702 PM EDT THU APR 20 2017

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 715 PM EDT
FOR SOUTHEASTERN ERIE COUNTY...

At 701 PM EDT, a severe thunderstorm was located near Elgin, or 25 
miles southeast of Erie, moving east at 25 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...
Corry and Elgin. 

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 4185 7976 4197 7979 4200 7973 4200 7962
      4199 7961 4185 7962
TIME...MOT...LOC 2301Z 253DEG 21KT 4192 7972 

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

Sefcovic

190 
WWUS51 KCLE 202314
SVSCLE

Severe Weather Statement
National Weather Service Cleveland OH
714 PM EDT THU APR 20 2017

PAC049-202324-
/O.EXP.KCLE.SV.W.0031.000000T0000Z-170420T2315Z/
Erie PA-
714 PM EDT THU APR 20 2017

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN ERIE COUNTY WILL
EXPIRE AT 715 PM EDT...
        
The storm which prompted the warning has moved out of the area.
Therefore the warning will be allowed to expire.

LAT...LON 4185 7976 4197 7979 4200 7973 4200 7962
      4199 7961 4185 7962
TIME...MOT...LOC 2314Z 252DEG 24KT 4194 7962 

$$

Mottice

The office that day

Everything else NWS Cleveland, OH issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Apr 20, 6:05 PM EDT	Special Weather Statement	CLE	Crawford	40 min
Apr 20, 6:21 PM EDT	Special Weather Statement	CLE	Crawford	24 min

Nearby

Severe Thunderstorm Warnings in Pennsylvania, 2017 Every severe thunderstorm warning in 2017

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.