Alert archive / Minnesota / Severe Thunderstorm Watches in 2016
Severe Thunderstorm Watch 403
The Storm Prediction Center issued this severe thunderstorm watch at Jul 21, 2016, 12:32 AM CDT for 14 counties in Minnesota; 14 counties in Wisconsin. It was in force for 6 hr.
The area
The outline as issued.
The facts
- Issued
- Jul 21, 2016, 12:32 AM CDT (05:32 UTC)
- Expired
- Jul 21, 2016, 6:40 AM CDT
- In force
- 6 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 1 in
- Strongest gust expected
- 65 kt
All 28 counties
Aitkin County, MN, Carlton County, MN, Cass County, MN, Cook County, MN, Crow Wing County, MN, Itasca County, MN, Kanabec County, MN, Koochiching County, MN, Lake County, MN, Mille Lacs County, MN, Morrison County, MN, Pine County, MN, Saint Louis County, MN, Todd County, MN, Ashland County, WI, Barron County, WI, Bayfield County, WI, Burnett County, WI, Chippewa County, WI, Douglas County, WI, Dunn County, WI, Iron County, WI, Pierce County, WI, Price County, WI, Rusk County, WI, Saint Croix County, WI, Sawyer County, WI, Washburn County, WI
The radar
The Duluth radar (KDLH), 97 km from the middle of the area, began a volume at 05:36 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 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
- 40%
- 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
21 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 21, 1:03 AM CDT | Severe Thunderstorm Warning | DLH | Cass, Itasca | 57 min |
| Jul 21, 1:13 AM CDT | Severe Thunderstorm Warning | DLH | Koochiching, Saint Louis | 62 min |
| Jul 21, 1:34 AM CDT | Severe Thunderstorm Warning | DLH | Aitkin, Cass, Crow Wing | 41 min |
| Jul 21, 1:51 AM CDT | Severe Thunderstorm Warning | MPX | Douglas, Morrison, Todd | 39 min |
| Jul 21, 2:01 AM CDT | Severe Thunderstorm Warning | DLH | Aitkin, Cass, Itasca, Koochiching, Saint Louis | 59 min |
| Jul 21, 2:14 AM CDT | Severe Thunderstorm Warning | DLH | Aitkin, Carlton, Crow Wing, Pine | 61 min |
| Jul 21, 2:17 AM CDT | Severe Thunderstorm Warning | DLH | Lake, Saint Louis | 58 min |
| Jul 21, 3:00 AM CDT | Severe Thunderstorm Warning | DLH | Carlton, Saint Louis | 60 min |
| Jul 21, 3:14 AM CDT | Severe Thunderstorm Warning | DLH | Cook, Lake | 46 min |
| Jul 21, 3:41 AM CDT | Severe Thunderstorm Warning | DLH | Lake, Saint Louis | 46 min |
| Jul 21, 3:50 AM CDT | Severe Thunderstorm Warning | DLH | Carlton, Pine | 40 min |
| Jul 21, 3:53 AM CDT | Severe Thunderstorm Warning | DLH | Saint Louis | 18 min |
| Jul 21, 3:59 AM CDT | Severe Thunderstorm Warning | DLH | Cook | 61 min |
| Jul 21, 4:05 AM CDT | Severe Thunderstorm Warning | DLH | Ashland, Bayfield, Douglas | 55 min |
| Jul 21, 4:27 AM CDT | Severe Thunderstorm Warning | MPX | Todd | 33 min |
| Jul 21, 4:32 AM CDT | Severe Thunderstorm Warning | DLH | Ashland, Bayfield, Burnett, Douglas, Sawyer, Washburn | 43 min |
| Jul 21, 4:41 AM CDT | Severe Thunderstorm Warning | DLH | Ashland, Iron | 49 min |
| Jul 21, 4:57 AM CDT | Severe Thunderstorm Warning | DLH | Ashland, Iron, Price, Sawyer | 63 min |
| Jul 21, 5:10 AM CDT | Severe Thunderstorm Warning | MPX | Barron, Chippewa, Dunn, Rusk | 65 min |
| Jul 21, 5:15 AM CDT | Severe Thunderstorm Warning | MPX | Douglas, Morrison, Todd | 30 min |
| Jul 21, 5:42 AM CDT | Severe Thunderstorm Warning | MPX | Morrison, Todd | 35 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
International Fa, MN (KINL), launched 00:00Z, 5.5 hours before the alert went out and 172 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
- 2808 J/kg
- Mixed-layer CIN
- -129 J/kg
- Mixed-layer LCL
- 915 m above ground
- 0-6 km bulk shear
- 39 kt
- 0-1 km storm-relative helicity
- 23 m²/s²
- 0-3 km storm-relative helicity
- 35 m²/s²
- Significant tornado parameter
- 0.1
- Supercell composite
- 1.0
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 20, 8:41 PM CDT | Severe Thunderstorm Watch | SPC | Becker, Beltrami, Clay, Clearwater, Grant, Hubbard and 12 more | 6 hr |
| Jul 20, 11:16 PM CDT | Mesoscale Discussion | SPC | Becker, Beltrami, Clearwater, Kittson, Lake of the Woods, Mahnomen and 6 more | 59 min |
| Jul 20, 11:36 PM CDT | Mesoscale Discussion | SPC | Aitkin, Cass, Crow Wing, Itasca, Koochiching, Saint Louis | 54 min |
| Jul 21, 2:30 AM CDT | Mesoscale Discussion | SPC | Aitkin, Benton, Carlton, Chisago, Crow Wing, Douglas and 10 more | 2 hr |
| Jul 21, 3:54 AM CDT | Mesoscale Discussion | SPC | Ashland, Bayfield, Burnett, Douglas, Florence, Forest and 8 more | 2 hr |
| Jul 21, 4:31 AM CDT | Severe Thunderstorm Watch | SPC | Brown, Calumet, Door, Florence, Forest, Kewaunee and 12 more | 6 hr |
| Jul 21, 6:39 AM CDT | Mesoscale Discussion | SPC | Buffalo, Clark, Eau Claire, Florence, Forest, Jackson and 15 more | 2 hr |
| Jul 21, 8:28 AM CDT | Mesoscale Discussion | SPC | Calumet, Columbia, Dane, Dodge, Fond du Lac, Green and 16 more | 2 hr |
| Jul 21, 8:45 AM CDT | Severe Thunderstorm Watch | SPC | Columbia, Dodge, Fond du Lac, Green Lake, Jefferson, Marquette and 5 more | 7 hr |
| Jul 21, 11:19 AM CDT | Mesoscale Discussion | SPC | Milwaukee, Racine | 116 min |
| Jul 21, 3:20 PM CDT | Mesoscale Discussion | SPC | Adams, Buffalo, Columbia, Eau Claire, Iowa, Jackson and 9 more | 115 min |
| Jul 21, 4:26 PM CDT | Severe Thunderstorm Watch | SPC | Columbia, Dane, Dodge, Fond du Lac, Green, Green Lake and 13 more | 5 hr |
| Jul 21, 5:42 PM CDT | Mesoscale Discussion | SPC | Columbia, Dane, Dodge, Fond du Lac, Green, Green Lake and 12 more | 93 min |
Nearby
Severe Thunderstorm Watches in Minnesota, 2016Severe Thunderstorm Watches in Wisconsin, 2016Every severe thunderstorm watch in 2016
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.