Alert archive / Indiana / Severe Thunderstorm Watches in 2021
Severe Thunderstorm Watch 290
The Storm Prediction Center issued this severe thunderstorm watch at Jun 19, 2021, 8:50 PM EDT for 20 counties in Indiana; Branch County, Hillsdale County, Michigan; 8 counties in Ohio. It was in force for 3 hr.
The area
The outline as issued.
The facts
- Issued
- Jun 19, 2021, 8:50 PM EDT (00:50 UTC)
- Expired
- Jun 19, 2021, 11:31 PM EDT
- In force
- 3 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 1.5 in
- Strongest gust expected
- 55 kt
All 30 counties
Adams County, IN, Allen County, IN, Cass County, IN, DeKalb County, IN, Elkhart County, IN, Fulton County, IN, Huntington County, IN, Kosciusko County, IN, LaGrange County, IN, LaPorte County, IN, Marshall County, IN, Miami County, IN, Noble County, IN, Pulaski County, IN, Saint Joseph County, IN, Starke County, IN, Steuben County, IN, Wabash County, IN, Wells County, IN, Whitley County, IN, Branch County, MI, Hillsdale County, MI, Allen County, OH, Defiance County, OH, Fulton County, OH, Henry County, OH, Paulding County, OH, Putnam County, OH, Van Wert County, OH, Williams County, OH
The radar
The Northern Indiana radar (KIWX), 7 km from the middle of the area, began a volume at 00:48 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
- 2%
- Ten or more severe wind reports
- 40%
- One or more gusts of 65 knots or more
- 5%
- Ten or more severe hail reports
- 30%
- One or more hailstones of 2 inches or more
- 10%
- Six or more combined severe hail and wind reports
- 70%
Warnings issued inside it
5 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 19, 8:53 PM EDT | Severe Thunderstorm Warning | IWX | LaPorte, Marshall, Saint Joseph, Starke | 52 min |
| Jun 19, 9:21 PM EDT | Severe Thunderstorm Warning | IWX | Steuben | 39 min |
| Jun 19, 9:43 PM EDT | Severe Thunderstorm Warning | IWX | Marshall, Starke | 47 min |
| Jun 19, 9:59 PM EDT | Severe Thunderstorm Warning | IWX | Hillsdale | 17 min |
| Jun 19, 10:30 PM EDT | Severe Thunderstorm Warning | IWX | Pulaski, Starke | 60 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, 0.8 hours before the alert went out and 243 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.
- Mixed-layer CAPE
- 36 J/kg
- Mixed-layer CIN
- -214 J/kg
- Mixed-layer LCL
- 969 m above ground
- 0-6 km bulk shear
- 38 kt
- 0-1 km storm-relative helicity
- 160 m²/s²
- 0-3 km storm-relative helicity
- 264 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
472 WWUS20 KWNS 200042 SEL0 SPC WW 200042 INZ000-MIZ000-OHZ000-200500- URGENT - IMMEDIATE BROADCAST REQUESTED Severe Thunderstorm Watch Number 290 NWS Storm Prediction Center Norman OK 845 PM EDT Sat Jun 19 2021 The NWS Storm Prediction Center has issued a * Severe Thunderstorm Watch for portions of Northern Indiana Southern Lower Michigan Northwest Ohio * Effective this Saturday night and Sunday morning from 845 PM until 100 AM EDT. * Primary threats include... Scattered damaging wind gusts to 65 mph possible Isolated large hail events to 1.5 inches in diameter possible SUMMARY...Multiple clusters of strong to severe storms should persist and potentially organize as they spread southeastward this evening across northern Indiana into northwest Ohio. The severe thunderstorm watch area is approximately along and 40 statute miles north and south of a line from 45 miles southwest of South Bend IN to 65 miles east northeast of Fort Wayne IN. For a complete depiction of the watch see the associated watch outline update (WOUS64 KWNS WOU0). PRECAUTIONARY/PREPAREDNESS ACTIONS... REMEMBER...A Severe Thunderstorm Watch means conditions are favorable for severe thunderstorms in and close to the watch area. Persons in these areas should be on the lookout for threatening weather conditions and listen for later statements and possible warnings. Severe thunderstorms can and occasionally do produce tornadoes. && OTHER WATCH INFORMATION...CONTINUE...WW 287...WW 286...WW 288...WW 289... AVIATION...A few severe thunderstorms with hail surface and aloft to 1.5 inches. Extreme turbulence and surface wind gusts to 55 knots. A few cumulonimbi with maximum tops to 500. Mean storm motion vector 32025. ...Guyer
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 19, 8:14 PM EDT | Mesoscale Discussion | SPC | Adams, Allen, Blackford, Carroll, Cass, Clinton and 30 more | 91 min |
| Jun 20, 11:57 AM EDT | Mesoscale Discussion | SPC | Benton, Jasper, Lake, Newton, Warren | 2 hr |
| Jun 20, 4:25 PM EDT | Mesoscale Discussion | SPC | Benton, Carroll, Cass, Clinton, Elkhart, Fountain and 20 more | 2 hr |
| Jun 20, 6:06 PM EDT | Severe Thunderstorm Watch | SPC | Adams, Allen, Blackford, Boone, Carroll, Cass and 38 more | 7 hr |
Nearby
Severe Thunderstorm Watches in Indiana, 2021Severe Thunderstorm Watches in Ohio, 2021Severe Thunderstorm Watches in Michigan, 2021Every severe thunderstorm watch 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.