Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2017

Severe Thunderstorm Warning 38, NWS Cleveland, OH

May 18, 2017Crawford County, Pennsylvania; Ashtabula County, Ohio

NWS Cleveland, OH issued this severe thunderstorm warning at May 18, 2017, 8:18 PM EDT for Crawford County, Pennsylvania; Ashtabula County, Ohio. It was in force for 42 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: May 18, 2017, 8:18 PM EDT (00:18 UTC)
Expired: May 18, 2017, 9:00 PM EDT
In force: 42 min
Issued by: NWS Cleveland, OH
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Ashtabula County, OH, Crawford County, PA

The radar

The Cleveland radar (KCLE), 126 km from the middle of the area, began a volume at 00:18 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
May 18, 8:41 PM EDT	HAIL 0.25	5 E Conneautville, PA	GUSTY WINDS AND HEAVY RAIN
May 18, 8:50 PM EDT	TSTM WND DMG	3 Nne Conneaut Lakeshor, PA	SEVERAL DOWNED TREES ON MCCARTHY AND GIBSON ROADS IN SUMMIT TOWNSHIP BETWEEN CONNEAUT LAKESHORE AND CONNEAUTVILLE. NWS SURVEY SHOWED DAMAGE THAT SUGGESTS 70 MPH STRAIGHT LINE WIND DAMAGE.
May 18, 9:10 PM EDT	HAIL 0.75	Meadville, PA

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

The nearest sounding before it

Pittsburgh, PA (KAGC), launched 00:00Z, 0.3 hours before the alert went out and 150 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: 324 J/kg
Mixed-layer CIN: -98 J/kg
Mixed-layer LCL: 1629 m above ground
0-6 km bulk shear: 40 kt
0-1 km storm-relative helicity: 200 m²/s²
0-3 km storm-relative helicity: 237 m²/s²
Significant tornado parameter: 0.1
Supercell composite: 4.3

Open this sounding in Storm Lab

The text

As transmitted.

193 
WUUS51 KCLE 190018
SVRCLE
OHC007-PAC039-190100-
/O.NEW.KCLE.SV.W.0038.170519T0018Z-170519T0100Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Cleveland OH
818 PM EDT THU MAY 18 2017

The National Weather Service in Cleveland has issued a

* Severe Thunderstorm Warning for...
  East central Ashtabula County in northeastern Ohio...
  Northwestern Crawford County in northwestern Pennsylvania...

* Until 900 PM EDT

* At 818 PM EDT, a severe thunderstorm was located 10 miles northwest
  of Andover, or 13 miles southeast of Ashtabula, moving east at 45
  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...
  Meadville, Cambridge Springs, Linesville, Harmonsburg, Guys Mills,
  Pierpont, Saegertown, Conneautville, Springboro, Blooming Valley,
  Venango and Woodcock.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4166 8073 4182 8073 4185 8041 4185 7993
      4158 7994
TIME...MOT...LOC 0018Z 267DEG 37KT 4174 8066 

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

Greenawalt

2 follow-up statements

323 
WWUS51 KCLE 190035
SVSCLE

Severe Weather Statement
National Weather Service Cleveland OH
835 PM EDT THU MAY 18 2017

OHC007-190044-
/O.CAN.KCLE.SV.W.0038.000000T0000Z-170519T0100Z/
Ashtabula OH-
835 PM EDT THU MAY 18 2017

...THE SEVERE THUNDERSTORM WARNING FOR EAST CENTRAL ASHTABULA COUNTY
IS CANCELLED...
    
The severe thunderstorm which prompted the warning has moved out of 
the warned area. Therefore, the warning has been cancelled.

LAT...LON 4164 8052 4184 8052 4185 8041 4185 7993
      4158 7994
TIME...MOT...LOC 0034Z 266DEG 42KT 4175 8038 

$$

PAC039-190100-
/O.CON.KCLE.SV.W.0038.000000T0000Z-170519T0100Z/
Crawford PA-
835 PM EDT THU MAY 18 2017

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 900 PM EDT
FOR NORTHWESTERN CRAWFORD COUNTY...

At 834 PM EDT, a severe thunderstorm was located near Linesville, or
14 miles northwest of Meadville, moving east at 50 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...
Meadville, Cambridge Springs, Linesville, Harmonsburg, Guys Mills,
Saegertown, Conneautville, Springboro, Blooming Valley, Venango and
Woodcock.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4164 8052 4184 8052 4185 8041 4185 7993
      4158 7994
TIME...MOT...LOC 0034Z 266DEG 42KT 4175 8038 

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

Greenawalt

691 
WWUS51 KCLE 190100
SVSCLE

Severe Weather Statement
National Weather Service Cleveland OH
900 PM EDT THU MAY 18 2017

PAC039-190109-
/O.EXP.KCLE.SV.W.0038.000000T0000Z-170519T0100Z/
Crawford PA-
900 PM EDT THU MAY 18 2017

...THE SEVERE THUNDERSTORM WARNING FOR NORTHWESTERN CRAWFORD COUNTY
WILL EXPIRE AT 900 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 gusty winds
and heavy rain are still possible with this thunderstorm.

LAT...LON 4164 8052 4184 8052 4185 8041 4185 7993
      4158 7994
TIME...MOT...LOC 0059Z 267DEG 37KT 4176 8004 

$$

Greenawalt

The office that day

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

Issued	Product	Office	Counties	Lasted
May 18, 9:02 PM EDT	Special Weather Statement	CLE	Crawford	43 min
May 19, 4:08 PM EDT	Beach Hazards Statement	CLE	Erie	32 hr
May 18, 8:18 PM EDT	Severe Thunderstorm Warning	CLE	Richland	27 min
May 18, 8:52 PM EDT	Severe Thunderstorm Warning	CLE	Medina, Wayne	53 min
May 18, 9:32 PM EDT	Severe Thunderstorm Warning	CLE	Crawford, Richland	43 min
May 19, 2:05 PM EDT	Special Weather Statement	CLE	Wayne	40 min
May 19, 3:58 PM EDT	Small Craft Advisory	CLE		32 hr

Nearby

Severe Thunderstorm Warnings in Pennsylvania, 2017 Severe Thunderstorm Warnings in Ohio, 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.