Alert archive / Wisconsin / Tornado Watches in 2017
Tornado Watch 222
The Storm Prediction Center issued this tornado watch at May 16, 2017, 4:02 PM CDT for 30 counties in Wisconsin. It was in force for 6 hr.
The area
The outline as issued.
The facts
- Issued
- May 16, 2017, 4:02 PM CDT (21:02 UTC)
- Expired
- May 16, 2017, 9:48 PM CDT
- In force
- 6 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 2 in
- Strongest gust expected
- 60 kt
All 30 counties
Ashland County, WI, Barron County, WI, Bayfield County, WI, Buffalo County, WI, Burnett County, WI, Chippewa County, WI, Clark County, WI, Douglas County, WI, Dunn County, WI, Eau Claire County, WI, Florence County, WI, Forest County, WI, Iron County, WI, Jackson County, WI, Langlade County, WI, Lincoln County, WI, Marathon County, WI, Menominee County, WI, Oneida County, WI, Pepin County, WI, Pierce County, WI, Polk County, WI, Price County, WI, Rusk County, WI, Saint Croix County, WI, Sawyer County, WI, Taylor County, WI, Trempealeau County, WI, Vilas County, WI, Washburn County, WI
The radar
The Duluth radar (KDLH), 126 km from the middle of the area, began a volume at 21:03 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
- 40%
- One or more EF2 to EF5 tornadoes
- 20%
- Ten or more severe wind reports
- 30%
- One or more gusts of 65 knots or more
- 10%
- Ten or more severe hail reports
- 60%
- One or more hailstones of 2 inches or more
- 40%
- Six or more combined severe hail and wind reports
- 70%
Warnings issued inside it
36 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 16, 4:06 PM CDT | Severe Thunderstorm Warning | MPX | Pierce | 39 min |
| May 16, 4:38 PM CDT | Severe Thunderstorm Warning | MPX | Saint Croix | 52 min |
| May 16, 4:39 PM CDT | Tornado Warning | MPX | Barron, Polk | 51 min |
| May 16, 4:55 PM CDT | Severe Thunderstorm Warning | MPX | Barron, Rusk | 65 min |
| May 16, 5:05 PM CDT | Tornado Warning | MPX | Barron | 55 min |
| May 16, 5:25 PM CDT | Severe Thunderstorm Warning | DLH | Burnett, Washburn | 34 min |
| May 16, 5:28 PM CDT | Severe Thunderstorm Warning | MPX | Barron, Dunn, Saint Croix | 47 min |
| May 16, 5:37 PM CDT | Tornado Warning | MPX | Rusk | 38 min |
| May 16, 5:53 PM CDT | Severe Thunderstorm Warning | DLH | Ashland, Bayfield, Sawyer | 37 min |
| May 16, 6:01 PM CDT | Tornado Warning | MPX | Rusk | 59 min |
| May 16, 6:10 PM CDT | Severe Thunderstorm Warning | MPX | Barron, Chippewa, Rusk | 65 min |
| May 16, 6:14 PM CDT | Tornado Warning | MPX | Chippewa | 35 min |
| May 16, 6:16 PM CDT | Severe Thunderstorm Warning | MPX | Pierce | 44 min |
| May 16, 6:27 PM CDT | Severe Thunderstorm Warning | DLH | Ashland, Iron | 33 min |
| May 16, 6:42 PM CDT | Severe Thunderstorm Warning | ARX | Taylor | 78 min |
| May 16, 6:47 PM CDT | Severe Thunderstorm Warning | DLH | Bayfield, Douglas, Sawyer, Washburn | 43 min |
| May 16, 6:48 PM CDT | Tornado Warning | DLH | Price | 42 min |
| May 16, 6:58 PM CDT | Severe Thunderstorm Warning | MPX | Pepin, Pierce | 47 min |
| May 16, 7:09 PM CDT | Severe Thunderstorm Warning | GRB | Lincoln | 51 min |
| May 16, 7:15 PM CDT | Severe Thunderstorm Warning | GRB | Oneida | 75 min |
| May 16, 7:16 PM CDT | Severe Thunderstorm Warning | ARX | Buffalo | 44 min |
| May 16, 7:30 PM CDT | Tornado Warning | DLH | Price | 15 min |
| May 16, 7:35 PM CDT | Severe Thunderstorm Warning | DLH | Ashland, Bayfield | 25 min |
| May 16, 7:37 PM CDT | Tornado Warning | DLH | Price | 8 min |
| May 16, 7:43 PM CDT | Tornado Warning | GRB | Lincoln | 47 min |
| May 16, 7:47 PM CDT | Severe Thunderstorm Warning | ARX | Trempealeau | 28 min |
| May 16, 7:49 PM CDT | Tornado Warning | DLH | Price | 11 min |
| May 16, 8:22 PM CDT | Tornado Warning | GRB | Langlade, Lincoln | 38 min |
| May 16, 8:31 PM CDT | Severe Thunderstorm Warning | GRB | Florence, Forest, Oneida | 44 min |
| May 16, 8:38 PM CDT | Severe Thunderstorm Warning | ARX | Buffalo, Trempealeau | 52 min |
| May 16, 8:47 PM CDT | Severe Thunderstorm Warning | ARX | Clark, Taylor | 28 min |
| May 16, 8:47 PM CDT | Severe Thunderstorm Warning | GRB | Lincoln, Marathon | 58 min |
| May 16, 8:53 PM CDT | Severe Thunderstorm Warning | ARX | Buffalo | 52 min |
| May 16, 9:33 PM CDT | Severe Thunderstorm Warning | ARX | Buffalo, Trempealeau | 72 min |
| May 16, 9:43 PM CDT | Severe Thunderstorm Warning | GRB | Langlade, Lincoln, Marathon, Shawano | 47 min |
| May 16, 9:44 PM CDT | Flash Flood Warning | ARX | Buffalo, Trempealeau | 4 hr |
Discussions around it
SPC mesoscale discussions over the same counties from four hours before the watch to its end.
The nearest sounding before it
Minneapolis, MN (KMPX), launched 12:00Z, 9.0 hours before the alert went out and 221 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
- 241 J/kg
- Mixed-layer CIN
- -181 J/kg
- Mixed-layer LCL
- 1186 m above ground
- 0-6 km bulk shear
- 48 kt
- 0-1 km storm-relative helicity
- -35 m²/s²
- 0-3 km storm-relative helicity
- -4 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- -1.3
The text
As transmitted.
073
WWUS20 KWNS 162059
SEL2
SPC WW 162059
WIZ000-LSZ000-170300-
URGENT - IMMEDIATE BROADCAST REQUESTED
Tornado Watch Number 222
NWS Storm Prediction Center Norman OK
400 PM CDT Tue May 16 2017
The NWS Storm Prediction Center has issued a
* Tornado Watch for portions of
Northern Wisconsin
Lake Superior
* Effective this Tuesday afternoon and evening from 400 PM until
1000 PM CDT.
* Primary threats include...
A couple tornadoes possible
Scattered large hail likely with isolated very large hail events
to 2 inches in diameter possible
Isolated damaging wind gusts to 70 mph possible
SUMMARY...Thunderstorms developing over eastern MN will track across
the watch area and pose a risk of large hail and isolated tornadoes.
The tornado watch area is approximately along and 75 statute miles
north and south of a line from 75 miles northwest of Eau Claire WI
to 20 miles northeast of Rhinelander WI. For a complete depiction of
the watch see the associated watch outline update (WOUS64 KWNS
WOU2).
PRECAUTIONARY/PREPAREDNESS ACTIONS...
REMEMBER...A Tornado Watch means conditions are favorable for
tornadoes and 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.
&&
OTHER WATCH INFORMATION...CONTINUE...WW 220...WW 221...
AVIATION...Tornadoes and a few severe thunderstorms with hail
surface and aloft to 2 inches. Extreme turbulence and surface wind
gusts to 60 knots. A few cumulonimbi with maximum tops to 500. Mean
storm motion vector 26030.
...HartSPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 16, 6:25 PM CDT | Mesoscale Discussion | SPC | Gogebic, Iron | 65 min |
| May 15, 7:19 PM CDT | Mesoscale Discussion | SPC | Crawford, Dane, Grant, Green, Iowa, Lafayette and 4 more | 56 min |
| May 15, 7:52 PM CDT | Severe Thunderstorm Watch | SPC | Dane, Green, Iowa, Jefferson, Kenosha, Lafayette and 3 more | 3 hr |
| May 15, 9:48 PM CDT | Severe Thunderstorm Watch | SPC | Buffalo, Crawford, Jackson, La Crosse, Monroe, Pepin and 4 more | 5 hr |
| May 15, 10:14 PM CDT | Mesoscale Discussion | SPC | Jefferson, Kenosha, Rock, Walworth, Waukesha | 61 min |
| May 16, 2:13 AM CDT | Mesoscale Discussion | SPC | Buffalo, La Crosse, Trempealeau | 92 min |
| May 16, 12:57 PM CDT | Mesoscale Discussion | SPC | Buffalo, Clark, Eau Claire, Jackson, Marathon, Menominee and 7 more | 2 hr |
| May 16, 3:32 PM CDT | Mesoscale Discussion | SPC | Adams, Barron, Buffalo, Burnett, Calumet, Chippewa and 33 more | 88 min |
Nearby
Tornado Watches in Wisconsin, 2017Every tornado watch 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.