Alert archive / Nebraska / Tornado Watches in 2015
Tornado Watch 265
The Storm Prediction Center issued this tornado watch at Jun 6, 2015, 8:45 PM CDT for 4 states. It was in force for 4 hr.
The area
The outline as issued.
The facts
- Issued
- Jun 6, 2015, 8:45 PM CDT (01:45 UTC)
- Expired
- Jun 7, 2015, 12:50 AM CDT
- In force
- 4 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 2 in
- Strongest gust expected
- 65 kt
All 47 counties
Buena Vista County, IA, Cherokee County, IA, Clay County, IA, Dickinson County, IA, Ida County, IA, Lyon County, IA, Monona County, IA, O'Brien County, IA, Osceola County, IA, Plymouth County, IA, Sioux County, IA, Woodbury County, IA, Cottonwood County, MN, Jackson County, MN, Lincoln County, MN, Lyon County, MN, Murray County, MN, Nobles County, MN, Pipestone County, MN, Rock County, MN, Antelope County, NE, Boone County, NE, Burt County, NE, Cedar County, NE, Colfax County, NE, Cuming County, NE, Dakota County, NE, Dixon County, NE, Dodge County, NE, Garfield County, NE, Holt County, NE, Knox County, NE, Madison County, NE, Pierce County, NE, Platte County, NE, Stanton County, NE, Thurston County, NE, Wayne County, NE, Wheeler County, NE, Bon Homme County, SD, Clay County, SD, Lincoln County, SD, Minnehaha County, SD, Moody County, SD, Turner County, SD, Union County, SD, Yankton County, SD
The radar
The Sioux Falls radar (KFSD), 91 km from the middle of the area, began a volume at 01:49 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
- 20%
- Ten or more severe wind reports
- 50%
- One or more gusts of 65 knots or more
- 30%
- Ten or more severe hail reports
- 30%
- One or more hailstones of 2 inches or more
- 30%
- Six or more combined severe hail and wind reports
- 60%
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 6, 9:23 PM CDT | Flash Flood Warning | FSD | Pipestone | 3 hr |
| Jun 6, 10:11 PM CDT | Flash Flood Warning | FSD | Plymouth, Woodbury | 3 hr |
| Jun 6, 10:32 PM CDT | Severe Thunderstorm Warning | FSD | Cherokee, Plymouth | 27 min |
| Jun 6, 10:51 PM CDT | Severe Thunderstorm Warning | OAX | Monona | 24 min |
| Jun 6, 11:51 PM CDT | Severe Thunderstorm Warning | OAX | Harrison, Monona, Shelby | 24 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
Omaha, NE (KOAX), launched 00:00Z, 1.8 hours before the alert went out and 173 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
- 1554 J/kg
- Mixed-layer CIN
- -63 J/kg
- Mixed-layer LCL
- 1214 m above ground
- 0-6 km bulk shear
- 25 kt
- 0-1 km storm-relative helicity
- 184 m²/s²
- 0-3 km storm-relative helicity
- 388 m²/s²
- Significant tornado parameter
- 0.9
- Supercell composite
- 13.1
The text
As transmitted, in the capitals the NWS used until 2016.
438
WWUS20 KWNS 070142
SEL5
SPC WW 070142
IAZ000-MNZ000-NEZ000-SDZ000-070800-
URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 265
NWS STORM PREDICTION CENTER NORMAN OK
845 PM CDT SAT JUN 6 2015
THE NWS STORM PREDICTION CENTER HAS ISSUED A
* TORNADO WATCH FOR PORTIONS OF
NORTHWESTERN IOWA
SOUTHWESTERN MINNESOTA
NORTHEASTERN NEBRASKA
SOUTHEASTERN SOUTH DAKOTA
* EFFECTIVE THIS SATURDAY NIGHT AND SUNDAY MORNING FROM 845 PM
UNTIL 300 AM CDT.
* PRIMARY THREATS INCLUDE...
A FEW TORNADOES POSSIBLE
SCATTERED DAMAGING WINDS AND ISOLATED SIGNIFICANT GUSTS TO 75
MPH POSSIBLE
ISOLATED VERY LARGE HAIL EVENTS TO 2 INCHES IN DIAMETER POSSIBLE
SUMMARY...GROWING CLUSTER OF SEVERE THUNDERSTORMS WILL SHIFT
GENERALLY EASTWARD ACROSS THE WATCH AREA THIS EVENING...WITH THE
POTENTIAL FOR A FEW EMBEDDED SUPERCELLS. AS SUCH...THE FULL
SPECTRUM OF SEVERE WEATHER RISK -- HAIL...WIND AND TORNADO -- IS
PRESENT. THE WIND-DAMAGE RISK WILL INCREASE EASTWARD ACROSS
NORTHERN IOWA AND SOUTHERN MINNESOTA WITH TIME.
THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 65 STATUTE
MILES EAST AND WEST OF A LINE FROM 25 MILES SOUTH SOUTHEAST OF
NORFOLK NEBRASKA TO 40 MILES EAST NORTHEAST OF BROOKINGS SOUTH
DAKOTA. FOR A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED
WATCH OUTLINE UPDATE (WOUS64 KWNS WOU5).
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...THIS TORNADO WATCH REPLACES TORNADO
WATCH NUMBER 262. WATCH NUMBER 262 WILL NOT BE IN EFFECT AFTER
845 PM CDT. CONTINUE...WW 263...WW 264...
AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL
SURFACE AND ALOFT TO 2 INCHES. EXTREME TURBULENCE AND SURFACE
WIND GUSTS TO 65 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO
550. MEAN STORM MOTION VECTOR 27025.
...EDWARDSSPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 6, 8:11 PM CDT | Mesoscale Discussion | SPC | Cherokee, Ida, Lyon, Monona, O'Brien, Osceola and 3 more | 64 min |
| Jun 6, 11:00 PM CDT | Mesoscale Discussion | SPC | Buena Vista, Calhoun, Carroll, Cherokee, Clay, Crawford and 14 more | 2 hr |
| Jun 6, 11:23 PM CDT | Severe Thunderstorm Watch | SPC | Adair, Audubon, Black Hawk, Boone, Bremer, Butler and 32 more | 6 hr |
| Jun 7, 1:56 AM CDT | Mesoscale Discussion | SPC | Adair, Adams, Benton, Black Hawk, Bremer, Buchanan and 29 more | 2 hr |
| Jun 7, 1:52 PM CDT | Mesoscale Discussion | SPC | Appanoose, Davis, Des Moines, Henry, Jefferson, Keokuk and 9 more | 53 min |
| Jun 7, 3:33 PM CDT | Severe Thunderstorm Watch | SPC | Appanoose, Clarke, Davis, Decatur, Des Moines, Henry and 10 more | 4 hr |
| Jun 7, 6:21 PM CDT | Mesoscale Discussion | SPC | Davis, Des Moines, Henry, Jefferson, Lee, Van Buren | 84 min |
| Jun 6, 7:44 PM CDT | Mesoscale Discussion | SPC | Becker, Big Stone, Chippewa, Clay, Douglas, Grant and 11 more | 91 min |
| Jun 6, 10:24 PM CDT | Mesoscale Discussion | SPC | Chippewa, Kandiyohi, Lac qui Parle, Meeker, Morrison, Pope and 3 more | 66 min |
| Jun 6, 7:55 PM CDT | Mesoscale Discussion | SPC | Chase, Dundy, Frontier, Hayes, Hitchcock, Perkins and 1 more | 95 min |
| Jun 6, 10:33 PM CDT | Mesoscale Discussion | SPC | Chase, Dawson, Dundy, Frontier, Furnas, Gosper and 5 more | 57 min |
| Jun 7, 2:36 PM CDT | Mesoscale Discussion | SPC | Chase, Dundy, Hayes, Hitchcock, Perkins | 114 min |
| Jun 7, 5:31 PM CDT | Mesoscale Discussion | SPC | Richardson | 89 min |
Nearby
Tornado Watches in Nebraska, 2015Tornado Watches in Iowa, 2015Tornado Watches in Minnesota, 2015Every tornado watch in 2015
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.