Alert archive / Nebraska / Severe Thunderstorm Watches in 2006
Severe Thunderstorm Watch 430
The Storm Prediction Center issued this severe thunderstorm watch at Jun 3, 2006, 9:42 PM CDT for 14 counties in Nebraska; 13 counties in South Dakota. It was in force for 6 hr.
The area
The outline as issued.
The facts
- Issued
- Jun 3, 2006, 9:42 PM CDT (02:42 UTC)
- Expired
- Jun 4, 2006, 4:00 AM CDT
- In force
- 6 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 2 in
- Strongest gust expected
- 60 kt
All 27 counties
Antelope County, NE, Boone County, NE, Boyd County, NE, Cedar County, NE, Colfax County, NE, Garfield County, NE, Holt County, NE, Knox County, NE, Madison County, NE, Pierce County, NE, Platte County, NE, Stanton County, NE, Wayne County, NE, Wheeler County, NE, Aurora County, SD, Beadle County, SD, Bon Homme County, SD, Brule County, SD, Charles Mix County, SD, Davison County, SD, Douglas County, SD, Gregory County, SD, Hanson County, SD, Hutchinson County, SD, Jerauld County, SD, Sanborn County, SD, Yankton County, SD
The radar
The Sioux Falls radar (KFSD), 182 km from the middle of the area, began a volume at 02:43 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
- 5%
- One or more EF2 to EF5 tornadoes
- 5%
- Ten or more severe wind reports
- 30%
- One or more gusts of 65 knots or more
- 30%
- Ten or more severe hail reports
- 60%
- One or more hailstones of 2 inches or more
- 20%
- Six or more combined severe hail and wind reports
- 80%
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 3, 9:58 PM CDT | Severe Thunderstorm Warning | LBF | Holt | 47 min |
| Jun 3, 10:10 PM CDT | Severe Thunderstorm Warning | OAX | Antelope | 35 min |
| Jun 3, 10:46 PM CDT | Severe Thunderstorm Warning | LBF | Holt | 44 min |
| Jun 3, 11:08 PM CDT | Severe Thunderstorm Warning | OAX | Antelope | 52 min |
| Jun 4, 12:33 AM CDT | Severe Thunderstorm Warning | OAX | Antelope | 42 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
Aberdeen, SD (KABR), launched 00:00Z, 2.7 hours before the alert went out and 201 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
- 817 J/kg
- Mixed-layer CIN
- -12 J/kg
- Mixed-layer LCL
- 2716 m above ground
- 0-6 km bulk shear
- 30 kt
- 0-1 km storm-relative helicity
- 4 m²/s²
- 0-3 km storm-relative helicity
- 82 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 1.7
The text
As transmitted, in the capitals the NWS used until 2016.
000
WWUS20 KWNS 040244
SEL0
SPC WW 040244
NEZ000-SDZ000-040900-
URGENT - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WATCH NUMBER 430
NWS STORM PREDICTION CENTER NORMAN OK
945 PM CDT SAT JUN 3 2006
THE NWS STORM PREDICTION CENTER HAS ISSUED A
SEVERE THUNDERSTORM WATCH FOR PORTIONS OF
NORTHEAST NEBRASKA
SOUTHEAST SOUTH DAKOTA
EFFECTIVE THIS SATURDAY NIGHT AND SUNDAY MORNING FROM 945 PM
UNTIL 400 AM CDT.
HAIL TO 2 INCHES IN DIAMETER...THUNDERSTORM WIND GUSTS TO 70
MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS.
THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 55
STATUTE MILES EAST AND WEST OF A LINE FROM 30 MILES NORTH OF
CHAMBERLAIN SOUTH DAKOTA TO 35 MILES SOUTH SOUTHWEST OF NORFOLK
NEBRASKA. FOR A COMPLETE DEPICTION OF THE WATCH SEE THE
ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU0).
REMEMBER...A SEVERE THUNDERSTORM WATCH MEANS CONDITIONS ARE
FAVORABLE FOR 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. SEVERE THUNDERSTORMS CAN AND OCCASIONALLY
DO PRODUCE TORNADOES.
OTHER WATCH INFORMATION...CONTINUE...WW 429...
DISCUSSION...ELEVATED THUNDERSTORMS EXPECTED TO INCREASE IN COVERAGE
AND INTENSITY ALONG NOSE OF 30-40 KT SSWLY LLJ OVER WW LATE TONIGHT.
STEEP MID LEVEL LAPSE RATES WILL SUPPORT MODERATE INSTABILITY. IN
ADDITION...35-45 KT EFFECTIVE SHEAR SHOULD SUSTAIN ORGANIZED
CLUSTERS AND/OR A SUPERCELL OR TWO. THIS WILL ENHANCE THE POTENTIAL
FOR LARGE HAIL AND ISOLATED DAMAGING WINDS.
AVIATION...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 29015.
...EVANSSPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 3, 7:55 PM CDT | Mesoscale Discussion | SPC | Adams, Antelope, Blaine, Boone, Boyd, Brown and 30 more | 3 hr |
| Jun 3, 10:42 PM CDT | Mesoscale Discussion | SPC | Antelope, Boone, Boyd, Cedar, Colfax, Cuming and 15 more | 93 min |
| Jun 3, 11:42 PM CDT | Mesoscale Discussion | SPC | Butler, Cass, Gage, Jefferson, Johnson, Lancaster and 8 more | 93 min |
| Jun 4, 2:31 AM CDT | Mesoscale Discussion | SPC | Butler, Fillmore, Gage, Jefferson, Johnson, Lancaster and 8 more | 119 min |
| Jun 3, 7:38 PM CDT | Mesoscale Discussion | SPC | Aurora, Beadle, Brown, Brule, Buffalo, Campbell and 14 more | 97 min |
| Jun 4, 2:21 PM CDT | Mesoscale Discussion | SPC | Beadle, Brookings, Brown, Clark, Codington, Day and 11 more | 2 hr |
Nearby
Severe Thunderstorm Watches in Nebraska, 2006Severe Thunderstorm Watches in South Dakota, 2006Every severe thunderstorm watch in 2006
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.