Alert archive / Wisconsin / Tornado Watches in 2007
Tornado Watch 76
The Storm Prediction Center issued this tornado watch at Mar 25, 2007, 5:19 PM CDT for 5 counties in Michigan; 22 counties in Wisconsin. It was in force for 4 hr.
The area
The outline as issued.
The facts
- Issued
- Mar 25, 2007, 5:19 PM CDT (22:19 UTC)
- Expired
- Mar 25, 2007, 9:43 PM CDT
- In force
- 4 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 2 in
- Strongest gust expected
- 70 kt
All 27 counties
Dickinson County, MI, Gogebic County, MI, Iron County, MI, Menominee County, MI, Ontonagon County, MI, Brown County, WI, Calumet County, WI, Door County, WI, Florence County, WI, Forest County, WI, Kewaunee County, WI, Langlade County, WI, Lincoln County, WI, Manitowoc County, WI, Marathon County, WI, Marinette County, WI, Menominee County, WI, Oconto County, WI, Oneida County, WI, Outagamie County, WI, Portage County, WI, Shawano County, WI, Vilas County, WI, Waupaca County, WI, Waushara County, WI, Winnebago County, WI, Wood County, WI
The radar
The Green Bay radar (KGRB), 176 km from the middle of the area, began a volume at 22:22 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
- 50%
- One or more EF2 to EF5 tornadoes
- 30%
- Ten or more severe wind reports
- 50%
- One or more gusts of 65 knots or more
- 30%
- Ten or more severe hail reports
- 40%
- One or more hailstones of 2 inches or more
- 30%
- Six or more combined severe hail and wind reports
- 90%
Warnings issued inside it
7 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Mar 25, 6:33 PM CDT | Severe Thunderstorm Warning | GRB | Portage, Wood | 57 min |
| Mar 25, 7:16 PM CDT | Severe Thunderstorm Warning | GRB | Langlade, Menominee, Shawano | 29 min |
| Mar 25, 7:23 PM CDT | Severe Thunderstorm Warning | GRB | Waupaca | 37 min |
| Mar 25, 7:43 PM CDT | Tornado Warning | GRB | Langlade, Menominee | 32 min |
| Mar 25, 7:54 PM CDT | Severe Thunderstorm Warning | GRB | Shawano | 36 min |
| Mar 25, 8:06 PM CDT | Tornado Warning | GRB | Oconto | 24 min |
| Mar 25, 8:50 PM CDT | Severe Thunderstorm Warning | GRB | Oconto | 25 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, 10.3 hours before the alert went out and 178 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
- 572 m above ground
- 0-6 km bulk shear
- 41 kt
- 0-1 km storm-relative helicity
- 252 m²/s²
- 0-3 km storm-relative helicity
- 343 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 252219
SEL6
SPC WW 252219
MIZ000-WIZ000-LMZ000-260500-
URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 76
NWS STORM PREDICTION CENTER NORMAN OK
520 PM CDT SUN MAR 25 2007
THE NWS STORM PREDICTION CENTER HAS ISSUED A
TORNADO WATCH FOR PORTIONS OF
WESTERN UPPER MICHIGAN
NORTHERN AND CENTRAL WISCONSIN
LAKE MICHIGAN
EFFECTIVE THIS SUNDAY AFTERNOON FROM 520 PM UNTIL MIDNIGHT CDT.
TORNADOES...HAIL TO 2 INCHES IN DIAMETER...THUNDERSTORM WIND
GUSTS TO 80 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE
AREAS.
THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 60 STATUTE
MILES EAST AND WEST OF A LINE FROM 40 MILES NORTHEAST OF IRONWOOD
MICHIGAN TO 20 MILES WEST SOUTHWEST OF OSHKOSH WISCONSIN. FOR A
COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE
UPDATE (WOUS64 KWNS WOU6).
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 75...
DISCUSSION...SCATTERED THUNDERSTORMS ARE EXPECTED TO SPREAD ACROSS
CENTRAL AND NORTHERN WI AND WESTERN LOWER MI THIS EVENING...AHEAD OF
STRONG UPPER TROUGH. INITIAL STORMS MAY BE SUPERCELLULAR WITH A
RISK OF LARGE HAIL AND TORNADOES. HOWEVER...ACTIVITY IS LIKELY TO
ORGANIZE INTO A SQUALL LINE DURING THE NIGHT WITH AN ENHANCED RISK
OF DAMAGING WINDS TOWARD MIDNIGHT.
AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL
SURFACE AND ALOFT TO 2 INCHES. EXTREME TURBULENCE AND SURFACE
WIND GUSTS TO 70 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO
500. MEAN STORM MOTION VECTOR 25040.
...HARTSPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Mar 25, 5:01 PM CDT | Mesoscale Discussion | SPC | Gogebic, Iron | 59 min |
| Mar 25, 1:48 PM CDT | Mesoscale Discussion | SPC | Barron, Buffalo, Burnett, Chippewa, Clark, Dunn and 12 more | 87 min |
| Mar 25, 2:54 PM CDT | Tornado Watch | SPC | Adams, Ashland, Barron, Bayfield, Buffalo, Burnett and 23 more | 6 hr |
| Mar 25, 5:57 PM CDT | Mesoscale Discussion | SPC | Chippewa, Clark, Eau Claire, Jackson, Pepin, Taylor | 63 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.