Alert archive / Kansas / Severe Thunderstorm Watches in 2011
Severe Thunderstorm Watch 85
The Storm Prediction Center issued this severe thunderstorm watch at Apr 3, 2011, 8:33 PM CDT for 14 counties in Kansas; 11 counties in Missouri. It was in force for 5 hr.
The area
The outline as issued.
The facts
- Issued
- Apr 3, 2011, 8:33 PM CDT (01:33 UTC)
- Expired
- Apr 4, 2011, 1:51 AM CDT
- In force
- 5 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 2 in
- Strongest gust expected
- 60 kt
All 25 counties
Allen County, KS, Bourbon County, KS, Butler County, KS, Chautauqua County, KS, Cherokee County, KS, Cowley County, KS, Crawford County, KS, Elk County, KS, Greenwood County, KS, Labette County, KS, Montgomery County, KS, Neosho County, KS, Wilson County, KS, Woodson County, KS, Barton County, MO, Benton County, MO, Camden County, MO, Cedar County, MO, Dade County, MO, Hickory County, MO, Jasper County, MO, Miller County, MO, Morgan County, MO, St. Clair County, MO, Vernon County, MO
The radar
The Topeka radar (KTWX), 134 km from the middle of the area, began a volume at 01:36 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
- 20%
- One or more EF2 to EF5 tornadoes
- 5%
- Ten or more severe wind reports
- 50%
- 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
- 90%
Warnings issued inside it
8 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 3, 9:03 PM CDT | Severe Thunderstorm Warning | ICT | Butler, Greenwood, Neosho | 27 min |
| Apr 3, 9:26 PM CDT | Severe Thunderstorm Warning | ICT | Butler, Elk, Greenwood | 50 min |
| Apr 3, 9:28 PM CDT | Severe Thunderstorm Warning | ICT | Cowley, Sumner | 62 min |
| Apr 3, 9:35 PM CDT | Severe Thunderstorm Warning | ICT | Woodson | 25 min |
| Apr 3, 9:54 PM CDT | Severe Thunderstorm Warning | ICT | Allen, Woodson | 51 min |
| Apr 3, 10:11 PM CDT | Severe Thunderstorm Warning | SGF | Bourbon | 49 min |
| Apr 3, 10:17 PM CDT | Severe Thunderstorm Warning | ICT | Chautauqua | 40 min |
| Apr 3, 10:35 PM CDT | Severe Thunderstorm Warning | SGF | Vernon | 40 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
Topeka, KS (KTOP), launched 00:00Z, 1.6 hours before the alert went out and 126 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
- 1873 J/kg
- Mixed-layer CIN
- -29 J/kg
- Mixed-layer LCL
- 2220 m above ground
- 0-6 km bulk shear
- 67 kt
- 0-1 km storm-relative helicity
- 138 m²/s²
- 0-3 km storm-relative helicity
- 140 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 6.1
The text
As transmitted, in the capitals the NWS used until 2016.
556
WWUS20 KWNS 040132
SEL5
SPC WW 040132
KSZ000-MOZ000-040700-
URGENT - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WATCH NUMBER 85
NWS STORM PREDICTION CENTER NORMAN OK
835 PM CDT SUN APR 3 2011
THE NWS STORM PREDICTION CENTER HAS ISSUED A
SEVERE THUNDERSTORM WATCH FOR PORTIONS OF
SOUTHEAST KANSAS
SOUTHWEST MISSOURI
EFFECTIVE THIS SUNDAY NIGHT AND MONDAY MORNING FROM 835 PM UNTIL
200 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 50
STATUTE MILES NORTH AND SOUTH OF A LINE FROM 65 MILES SOUTHWEST
OF EMPORIA KANSAS TO 65 MILES NORTHEAST OF JOPLIN MISSOURI. FOR
A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH
OUTLINE UPDATE (WOUS64 KWNS WOU5).
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 82...WW 83...WW 84...
DISCUSSION...THUNDERSTORMS ARE DEVELOPING ALONG A SURFACE COLD FRONT
SAGGING ACROSS EASTERN KS. STORMS ARE EXPECTED TO STAY ELEVATED AND
JUST NORTH OF THE BOUNDARY...WITH LARGE HAIL AND DAMAGING WINDS
BEING THE PRIMARY THREAT THROUGH EARLY MONDAY MORNING.
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 26040.
...HARTSPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 3, 7:26 PM CDT | Mesoscale Discussion | SPC | Atchison, Brown, Chase, Dickinson, Doniphan, Douglas and 19 more | 64 min |
| Apr 3, 8:15 PM CDT | Mesoscale Discussion | SPC | Allen, Anderson, Atchison, Bourbon, Brown, Butler and 34 more | 60 min |
| Apr 3, 11:02 PM CDT | Mesoscale Discussion | SPC | Bourbon, Cherokee, Crawford, Labette, Neosho | 88 min |
| Apr 4, 1:29 AM CDT | Mesoscale Discussion | SPC | Cherokee | 91 min |
| Apr 3, 7:44 PM CDT | Mesoscale Discussion | SPC | Clark, Putnam, Schuyler, Scotland | 61 min |
| Apr 3, 8:11 PM CDT | Severe Thunderstorm Watch | SPC | Audrain, Boone, Callaway, Cole, Franklin, Gasconade and 12 more | 6 hr |
| Apr 3, 9:51 PM CDT | Mesoscale Discussion | SPC | Barry, McDonald, Newton | 84 min |
| Apr 3, 10:50 PM CDT | Mesoscale Discussion | SPC | Chariton, Howard, Knox, Lewis, Macon, Marion and 4 more | 85 min |
| Apr 4, 5:48 AM CDT | Mesoscale Discussion | SPC | Oregon, Ripley | 117 min |
| Apr 4, 7:22 AM CDT | Tornado Watch | SPC | Bollinger, Butler, Cape Girardeau, Carter, Dunklin, Mississippi and 7 more | 7 hr |
Nearby
Severe Thunderstorm Watches in Kansas, 2011Severe Thunderstorm Watches in Missouri, 2011Every severe thunderstorm watch in 2011
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.