Alert archive / Ohio / Severe Thunderstorm Warnings in 2017

Severe Thunderstorm Warning 105, NWS Wilmington, OH

May 1, 2017Delaware County, Ohio

NWS Wilmington, OH issued this severe thunderstorm warning at May 1, 2017, 9:43 AM EDT for Delaware County, Ohio. It was in force for 17 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: May 1, 2017, 9:43 AM EDT (13:43 UTC)
Expired: May 1, 2017, 10:00 AM EDT
In force: 17 min
Issued by: NWS Wilmington, OH
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

County Delaware County, OH

The radar

The Cincinnati radar (KILN), 118 km from the middle of the area, began a volume at 13:46 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

Cncnati-Daytn, OH (KILN), launched 12:00Z, 1.7 hours before the alert went out and 116 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: 77 J/kg
Mixed-layer CIN: -12 J/kg
Mixed-layer LCL: 753 m above ground
0-6 km bulk shear: 77 kt
0-1 km storm-relative helicity: 461 m²/s²
0-3 km storm-relative helicity: 464 m²/s²
Significant tornado parameter: 0.1
Supercell composite: 1.2

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Wilmington, OH wrote its last area forecast discussion before this severe thunderstorm warning went out at May 1, 9:41 AM EDT, 2 minutes earlier.

Area forecast discussion, May 1, 9:41 AM EDT, 2 minutes before

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Hazardous weather outlook, May 1, 9:26 AM EDT, 17 minutes before

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In the hours before

Special weather statement, May 1, 7:28 AM EDT, 2 hours 15 minutes before

Special Weather Statement
National Weather Service Wilmington OH
728 AM EDT MON MAY 1 2017

KYZ097>100-OHZ063-071-072-078>081-011230-
Robertson KY-Mason KY-Lewis KY-Bracken KY-Clermont OH-Highland OH-
Adams OH-Brown OH-Warren OH-Fayette OH-Clinton OH-
728 AM EDT MON MAY 1 2017

...A LINE OF STRONG THUNDERSTORMS WILL AFFECT MASON...ROBERTSON...
NORTHWESTERN LEWIS...BRACKEN...EASTERN CLERMONT...BROWN...
SOUTHEASTERN WARREN...SOUTH CENTRAL FAYETTE...WESTERN ADAMS...CLINTON
AND HIGHLAND COUNTIES UNTIL 830 AM EDT...

At 728 AM EDT, radar indicated strong thunderstorms along a line
extending from 6 miles southwest of Blanchester to 10 miles northeast
of Cynthiana, moving northeast at 40 mph.

STORM HAZARDS INCLUDE...
Winds to 50 mph...
Very heavy rain...

Locations impacted include...
Wilmington, Maysville, Hillsboro, Georgetown, Blanchester,
Washington, Mount Orab, West Union, Bethel, Williamsburg, Manchester,
Ripley, Aberdeen, Lynchburg, Leesburg, New Vienna, Augusta, Morrow,
Winchester and Sardinia.

This includes I-71 in Ohio between mile markers 35 and 41.

Water will pond on roads and may quickly fill roadside ditches and
small streams.

To report hazardous weather conditions, go to our website at
weather.gov/iln and submit your report via social media, when you can
do so safely.

LAT...LON 3843 8400 3846 8410 3848 8413 3848 8417
      3850 8416 3850 8418 3856 8416 3855 8421
      3859 8420 3860 8421 3946 8412 3944 8348
      3843 8356 3843 8358 3849 8359 3852 8364
      3846 8386 3849 8393 3842 8400
TIME...MOT...LOC 1128Z 234DEG 36KT 3923 8407 3849 8416

Special weather statement, May 1, 7:33 AM EDT, 2 hours 10 minutes before

Special Weather Statement
National Weather Service Wilmington OH
733 AM EDT MON MAY 1 2017

OHZ026-035-043>045-051>054-062-063-071-072-011230-
Warren OH-Hardin OH-Clark OH-Greene OH-Champaign OH-Auglaize OH-
Logan OH-Fayette OH-Madison OH-Clinton OH-Shelby OH-Union OH-
Miami OH-
733 AM EDT MON MAY 1 2017

...A LINE OF STRONG THUNDERSTORMS WILL AFFECT EASTERN SHELBY...
CHAMPAIGN AND LOGAN COUNTIES IN WEST CENTRAL OHIO...WESTERN FAYETTE
COUNTY IN CENTRAL OHIO...CLARK AND NORTHEASTERN AUGLAIZE COUNTIES IN
WEST CENTRAL OHIO...NORTHEASTERN WARREN AND NORTHERN CLINTON COUNTIES
IN SOUTHWESTERN OHIO...GREENE AND HARDIN COUNTIES IN WEST CENTRAL
OHIO...CENTRAL MADISON...WESTERN UNION COUNTIES IN CENTRAL OHIO AND
EASTERN MIAMI COUNTIES IN WEST CENTRAL OHIO UNTIL 830 AM EDT...

At 732 AM EDT, radar indicated strong thunderstorms along a line
extending from near Fort Shawnee to near Waynesville, moving
northeast at 40 mph.

STORM HAZARDS INCLUDE...
Winds to 50 mph...
Very heavy rain...

Locations impacted include...
Springfield, Beavercreek, Huber Heights, Fairborn, Xenia, Marysville,
Washington Court House, Bellefontaine, Wilmington, Urbana, London,
Kenton, Bellbrook, Ada, New Carlisle, Yellow Springs,
Wright-Patterson Afb, Northridge, Cedarville and Waynesville.

This includes the following Interstates...
 I-70 in Ohio between mile markers 41 and 79.
 I-71 in Ohio between mile markers 42 and 79.

Water will pond on roads and may quickly fill roadside ditches and
small streams.

To report hazardous weather conditions, go to our website at
weather.gov/iln and submit your report via social media, when you can
do so safely.

LAT...LON 4082 8350 4070 8350 4069 8342 4051 8342
      4051 8334 3944 8340 3946 8407 4064 8406
      4065 8388 4082 8388
TIME...MOT...LOC 1132Z 238DEG 35KT 4067 8403 3950 8402

Special weather statement, May 1, 8:19 AM EDT, 1 hour 24 minutes before

Special Weather Statement
National Weather Service Wilmington OH
819 AM EDT MON MAY 1 2017

KYZ099-100-OHZ063-072-073-079>082-011315-
Mason KY-Lewis KY-Pike OH-Highland OH-Adams OH-Brown OH-Ross OH-
Fayette OH-Clinton OH-
819 AM EDT MON MAY 1 2017

...A LINE OF STRONG THUNDERSTORMS WILL AFFECT MASON...LEWIS...
SOUTHEASTERN BROWN...SOUTHEASTERN FAYETTE...ADAMS...SOUTHEASTERN
CLINTON...WESTERN PIKE...HIGHLAND AND SOUTHWESTERN ROSS COUNTIES
UNTIL 915 AM EDT...

At 818 AM EDT, radar indicated strong thunderstorms along a line
extending from near New Vienna to near Cowan, moving northeast at 45
mph.

STORM HAZARDS INCLUDE...
Winds to 50 mph...
Very heavy rain...

Locations impacted include...
Maysville, Hillsboro, Greenfield, Washington, West Union, Manchester,
Peebles, Ripley, Aberdeen, Vanceburg, Leesburg, New Vienna,
Winchester, Marshall, Sardinia, Seaman, Bainbridge, Lewisburg,
Belfast and Rome.

Water will pond on roads and may quickly fill roadside ditches and
small streams.

To report hazardous weather conditions, go to our website at
weather.gov/iln and submit your report via social media, when you can
do so safely.

LAT...LON 3841 8351 3841 8353 3843 8358 3849 8359
      3851 8361 3851 8363 3852 8363 3852 8364
      3846 8386 3849 8392 3944 8372 3944 8317
      3900 8323 3901 8327 3879 8327 3842 8332
      3840 8347
TIME...MOT...LOC 1218Z 229DEG 40KT 3941 8369 3844 8389

Special weather statement, May 1, 8:24 AM EDT, 1 hour 19 minutes before

Special Weather Statement
National Weather Service Wilmington OH
824 AM EDT MON MAY 1 2017

OHZ026-044>046-052>055-063-064-072-073-011330-
Champaign OH-Ross OH-Delaware OH-Logan OH-Fayette OH-Madison OH-
Clinton OH-Hardin OH-Franklin OH-Pickaway OH-Union OH-Clark OH-
824 AM EDT MON MAY 1 2017

...A LINE OF STRONG THUNDERSTORMS WILL AFFECT SOUTHEASTERN CHAMPAIGN
COUNTY IN WEST CENTRAL OHIO...FRANKLIN COUNTY IN CENTRAL OHIO...
EASTERN LOGAN COUNTY IN WEST CENTRAL OHIO...FAYETTE COUNTY IN CENTRAL
OHIO...NORTHEASTERN CLINTON COUNTY IN SOUTHWESTERN OHIO...WESTERN
PICKAWAY AND DELAWARE COUNTIES IN CENTRAL OHIO...SOUTHEASTERN CLARK
AND EASTERN HARDIN COUNTIES IN WEST CENTRAL OHIO...MADISON...UNION
COUNTIES IN CENTRAL OHIO AND NORTHWESTERN ROSS COUNTIES IN
SOUTHWESTERN OHIO UNTIL 930 AM EDT...

At 823 AM EDT, radar indicated strong thunderstorms along a line
extending from near Forest to near Sabina, moving northeast at 50
mph.

STORM HAZARDS INCLUDE...
Winds to 50 mph...
Very heavy rain...

Locations impacted include...
Columbus, Dublin, Westerville, Grove City, Delaware, Upper Arlington,
Hilliard, Marysville, Washington Court House, Worthington, Bexley,
London, Kenton, Jefferson, Powell, Sunbury, Plain City, West
Jefferson, Ashville and Sabina.

This includes the following Interstates...
 I-70 in Ohio between mile markers 70 and 104.
 I-71 in Ohio between mile markers 64 and 139.

Water will pond on roads and may quickly fill roadside ditches and
small streams.

To report hazardous weather conditions, go to our website at
weather.gov/iln and submit your report via social media, when you can
do so safely.

LAT...LON 4070 8350 4070 8344 4069 8344 4069 8342
      4050 8342 4051 8326 4044 8325 4043 8302
      4042 8301 4041 8293 4036 8293 4035 8285
      3944 8304 3944 8368 3995 8356 4082 8363
      4082 8351
TIME...MOT...LOC 1223Z 228DEG 42KT 4083 8347 3948 8354

Special weather statement, May 1, 9:20 AM EDT, 23 minutes before

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Local storm report, May 1, 9:24 AM EDT, 19 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 30, 8:25 PM EDT	Special Weather Statement	ILN	Clermont	35 min
Apr 30, 8:53 PM EDT	Special Weather Statement	ILN	Clinton	37 min
Apr 30, 8:55 PM EDT	Special Weather Statement	ILN	Brown	35 min
Apr 30, 9:19 PM EDT	Special Weather Statement	ILN	Clinton, Highland	41 min
Apr 30, 9:40 PM EDT	Special Weather Statement	ILN	Fayette	35 min
May 1, 3:10 AM EDT	Special Weather Statement	ILN	Adams, Brown, Clermont, Clinton, Highland	35 min
May 1, 5:49 AM EDT	Special Weather Statement	ILN	Butler, Darke, Mercer, Preble	56 min
May 1, 5:53 AM EDT	Special Weather Statement	ILN	Clermont, Hamilton, Warren	67 min
May 1, 6:44 AM EDT	Special Weather Statement	ILN	Champaign, Clermont, Greene, Logan, Miami, Montgomery and 1 more	61 min
May 1, 7:28 AM EDT	Special Weather Statement	ILN	Brown, Clermont, Clinton, Highland	62 min
May 1, 7:33 AM EDT	Special Weather Statement	ILN	Champaign, Clark, Fayette, Greene, Hardin, Logan and 2 more	57 min
May 1, 7:53 AM EDT	Severe Thunderstorm Warning	ILN	Champaign, Clark	26 min
May 1, 8:19 AM EDT	Special Weather Statement	ILN	Adams, Highland	56 min
May 1, 8:24 AM EDT	Special Weather Statement	ILN	Delaware, Fayette, Franklin, Madison, Pickaway, Union	66 min
May 1, 8:28 AM EDT	Severe Thunderstorm Warning	ILN	Union	25 min
May 1, 8:45 AM EDT	Severe Thunderstorm Warning	ILN	Delaware, Union	30 min
May 1, 9:10 AM EDT	Severe Thunderstorm Warning	ILN	Franklin	20 min
May 1, 9:20 AM EDT	Special Weather Statement	ILN	Delaware, Franklin, Pickaway, Ross	55 min
May 1, 9:35 AM EDT	Areal Flood Advisory	ILN	Brown, Clermont, Highland	115 min
May 1, 9:58 AM EDT	Special Weather Statement	ILN	Pike, Scioto	62 min
May 1, 10:19 AM EDT	Special Weather Statement	ILN	Fairfield, Hocking, Licking	56 min
May 1, 10:46 AM EDT	Special Weather Statement	ILN	Pike, Scioto	44 min
May 1, 10:59 AM EDT	Severe Thunderstorm Warning	ILN	Pike, Scioto	22 min
May 1, 11:49 AM EDT	Special Weather Statement	ILN	Hocking	11 min
May 1, 11:56 AM EDT	Special Weather Statement	ILN	Licking	19 min
Apr 30, 8:05 PM EDT	Special Weather Statement	ILN	Pendleton	25 min
Apr 30, 8:28 PM EDT	Special Weather Statement	ILN	Bracken	47 min
May 1, 4:44 AM EDT	Special Weather Statement	ILN	Dearborn, Fayette, Franklin, Ripley, Union, Wayne	61 min

Nearby

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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.