Alert archive / Wisconsin / Tornado Watches in 2007
Tornado Watch 407
The Storm Prediction Center issued this tornado watch at Jun 17, 2007, 1:35 PM CDT for Dickinson County, Iron County, Menominee County, Michigan; 11 counties in Wisconsin. It was in force for 5 hr.
The area
The outline as issued.
The facts
- Issued
- Jun 17, 2007, 1:35 PM CDT (18:35 UTC)
- Expired
- Jun 17, 2007, 7:00 PM CDT
- In force
- 5 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 3 in
- Strongest gust expected
- 60 kt
Counties Dickinson County, MI, Iron County, MI, Menominee County, MI, Florence County, WI, Forest County, WI, Langlade County, WI, Lincoln County, WI, Marathon County, WI, Marinette County, WI, Menominee County, WI, Oconto County, WI, Oneida County, WI, Shawano County, WI, Vilas County, WI
The radar
The Marquette radar (KMQT), 140 km from the middle of the area, began a volume at 18:34 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
- 30%
- Ten or more severe hail reports
- 50%
- One or more hailstones of 2 inches or more
- 60%
- Six or more combined severe hail and wind reports
- 80%
Warnings issued inside it
4 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 17, 1:59 PM CDT | Severe Thunderstorm Warning | GRB | Langlade, Lincoln, Oneida | 46 min |
| Jun 17, 2:43 PM CDT | Severe Thunderstorm Warning | GRB | Forest, Langlade, Oneida | 62 min |
| Jun 17, 3:43 PM CDT | Severe Thunderstorm Warning | GRB | Forest | 47 min |
| Jun 17, 5:01 PM CDT | Severe Thunderstorm Warning | GRB | Marinette | 29 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
Green Bay/Straub, WI (KGRB), launched 12:00Z, 6.6 hours before the alert went out and 166 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 1085 m above ground
- 0-6 km bulk shear
- 30 kt
- 0-1 km storm-relative helicity
- 34 m²/s²
- 0-3 km storm-relative helicity
- 68 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.1
The text
As transmitted, in the capitals the NWS used until 2016.
000
WWUS20 KWNS 171834
SEL7
SPC WW 171834
MIZ000-WIZ000-180000-
URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 407
NWS STORM PREDICTION CENTER NORMAN OK
135 PM CDT SUN JUN 17 2007
THE NWS STORM PREDICTION CENTER HAS ISSUED A
TORNADO WATCH FOR PORTIONS OF
PART OF THE WESTERN UPPER PENINSULA MICHIGAN
NORTHEASTERN WISCONSIN
EFFECTIVE THIS SUNDAY AFTERNOON AND EVENING FROM 135 PM UNTIL 700
PM CDT.
TORNADOES...HAIL TO 3 INCHES IN DIAMETER...THUNDERSTORM WIND
GUSTS TO 70 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE
AREAS.
THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 60 STATUTE
MILES NORTH AND SOUTH OF A LINE FROM 30 MILES WEST NORTHWEST OF
RHINELANDER WISCONSIN TO 40 MILES SOUTHEAST OF IRON MOUNTAIN
MICHIGAN. FOR A COMPLETE DEPICTION OF THE WATCH SEE THE
ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU7).
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.
DISCUSSION...PAIR OF SUPERCELLS HAS DEVELOPED QUICKLY THIS AFTERNOON
OVER N-CENTRAL WI. ACTIVITY WILL LIKELY CONTINUE TO BE FED BY VERY
UNSTABLE AIR TO THE SOUTHWEST...WITH FURTHER INSTABILITY LIKELY
AHEAD OF THESE STORMS INTO NERN WI REST OF THE AFTERNOON. STRONG
SHEAR AND COLLOCATION ALONG SURFACE WARM FRONT WILL INCREASE THE
RISK OF A FEW TORNADOES. VERY LARGE HAIL AND ISOLATED WIND DAMAGE
ARE ALSO LIKELY WITH THESE STORMS.
AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL
SURFACE AND ALOFT TO 3 INCHES. EXTREME TURBULENCE AND SURFACE
WIND GUSTS TO 60 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO
500. MEAN STORM MOTION VECTOR 25025.
...EVANSSPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 17, 1:20 PM CDT | Mesoscale Discussion | SPC | Dickinson, Iron, Menominee | 85 min |
| Jun 17, 6:17 PM CDT | Mesoscale Discussion | SPC | Iron, Menominee | 58 min |
Nearby
Tornado Watches in Wisconsin, 2007Tornado Watches in Michigan, 2007Every tornado watch in 2007
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.