Alert archive / Ohio / Severe Thunderstorm Watches in 2014

Severe Thunderstorm Watch 382

July 1, 20149 counties in Michigan; 18 counties in Ohio

The Storm Prediction Center issued this severe thunderstorm watch at Jul 1, 2014, 1:44 AM EDT for 9 counties in Michigan; 18 counties in Ohio. It was in force for 4 hr.

The area

The outline as issued.

The facts

Issued
Jul 1, 2014, 1:44 AM EDT (05:44 UTC)
Expired
Jul 1, 2014, 5:44 AM EDT
In force
4 hr
Issued by
the Storm Prediction Center
Largest hail expected
1 in
Strongest gust expected
70 kt
All 27 counties

Hillsdale County, MI, Lenawee County, MI, Livingston County, MI, Macomb County, MI, Monroe County, MI, Oakland County, MI, Saint Clair County, MI, Washtenaw County, MI, Wayne County, MI, Allen County, OH, Crawford County, OH, Defiance County, OH, Erie County, OH, Fulton County, OH, Hancock County, OH, Henry County, OH, Huron County, OH, Lucas County, OH, Ottawa County, OH, Paulding County, OH, Putnam County, OH, Sandusky County, OH, Seneca County, OH, Van Wert County, OH, Williams County, OH, Wood County, OH, Wyandot County, OH

The radar

The Detroit radar (KDTX), 66 km from the middle of the area, began a volume at 05:47 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 SPC expected

The probabilities SPC published with the watch, for the watch area over its life.

Two or more tornadoes
10%
One or more EF2 to EF5 tornadoes
5%
Ten or more severe wind reports
50%
One or more gusts of 65 knots or more
30%
Ten or more severe hail reports
5%
One or more hailstones of 2 inches or more
5%
Six or more combined severe hail and wind reports
70%

Warnings issued inside it

12 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.

IssuedProductOfficeCountiesLasted
Jul 1, 1:44 AM EDTSevere Thunderstorm WarningIWXBranch, Hillsdale46 min
Jul 1, 2:01 AM EDTSevere Thunderstorm WarningIWXVan Wert44 min
Jul 1, 2:08 AM EDTSevere Thunderstorm WarningIWXHillsdale37 min
Jul 1, 2:17 AM EDTSevere Thunderstorm WarningDTXLivingston, Washtenaw58 min
Jul 1, 2:23 AM EDTSevere Thunderstorm WarningDTXLenawee67 min
Jul 1, 2:38 AM EDTSevere Thunderstorm WarningIWXDefiance, Fulton, Henry, Paulding, Williams37 min
Jul 1, 2:40 AM EDTSevere Thunderstorm WarningIWXAllen, Paulding, Putnam, Van Wert65 min
Jul 1, 2:55 AM EDTSevere Thunderstorm WarningDTXOakland, Wayne63 min
Jul 1, 3:06 AM EDTSevere Thunderstorm WarningCLEHancock, Lucas, Wood54 min
Jul 1, 3:09 AM EDTSevere Thunderstorm WarningDTXMonroe53 min
Jul 1, 3:22 AM EDTSevere Thunderstorm WarningDTXLapeer, Macomb53 min
Jul 1, 3:43 AM EDTSevere Thunderstorm WarningDTXSaint Clair, Sanilac48 min

Discussions around it

SPC mesoscale discussions over the same counties from four hours before the watch to its end.

The nearest sounding before it

Detroit, MI (KDTX), launched 00:00Z, 5.7 hours before the alert went out and 69 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, Detroit, MI at 00:00Z on 2014-07-01Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1381 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, Detroit, MI at 00:00Z on 2014-07-01The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 50 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
1381 J/kg
Mixed-layer CIN
-38 J/kg
Mixed-layer LCL
1064 m above ground
0-6 km bulk shear
16 kt
0-1 km storm-relative helicity
50 m²/s²
0-3 km storm-relative helicity
70 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jun 30, 8:23 PM EDTSevere Thunderstorm WatchSPCAllegan, Arenac, Barry, Calhoun, Clare, Clinton and 25 more7 hr
Jun 30, 8:47 PM EDTMesoscale DiscussionSPCBerrien88 min
Jun 30, 9:44 PM EDTMesoscale DiscussionSPCBerrien31 min
Jun 30, 10:06 PM EDTMesoscale DiscussionSPCBarry, Calhoun, Cass, Clare, Clinton, Eaton and 10 more84 min
Jun 30, 11:35 PM EDTSevere Thunderstorm WatchSPCBerrien, Branch, Cass, Saint Joseph4 hr
Jul 1, 12:31 AM EDTMesoscale DiscussionSPCBranch, Cass, Kalamazoo, Saint Joseph89 min
Jul 1, 1:24 AM EDTMesoscale DiscussionSPCBranch, Calhoun, Eaton, Hillsdale, Ingham, Jackson and 7 more66 min
Jul 1, 4:05 AM EDTMesoscale DiscussionSPCMacomb, Saint Clair55 min
Jul 1, 2:56 AM EDTMesoscale DiscussionSPCAdams, Auglaize, Brown, Butler, Champaign, Clark and 19 more64 min
Jul 1, 3:22 PM EDTMesoscale DiscussionSPCCarroll, Columbiana, Harrison, Jefferson, Mahoning, Stark and 1 more53 min
Jul 1, 5:43 PM EDTMesoscale DiscussionSPCBrown, Butler, Clermont, Hamilton, Warren92 min

Nearby

Severe Thunderstorm Watches in Ohio, 2014Severe Thunderstorm Watches in Michigan, 2014Every severe thunderstorm watch in 2014

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.