Alert archive / Kansas / Mesoscale Discussions in 2011
Mesoscale Discussion 921
The Storm Prediction Center issued this mesoscale discussion at May 24, 2011, 9:18 AM CDT for 34 counties in Kansas; 4 counties in Missouri. It was in force for 87 min.
The area
The outline as issued.
The facts
- Issued
- May 24, 2011, 9:18 AM CDT (14:18 UTC)
- Expired
- May 24, 2011, 10:45 AM CDT
- In force
- 87 min
- Issued by
- the Storm Prediction Center
All 38 counties
Allen County, KS, Anderson County, KS, Atchison County, KS, Bourbon County, KS, Chase County, KS, Clay County, KS, Cloud County, KS, Coffey County, KS, Dickinson County, KS, Douglas County, KS, Franklin County, KS, Geary County, KS, Jackson County, KS, Jefferson County, KS, Jewell County, KS, Johnson County, KS, Leavenworth County, KS, Lincoln County, KS, Linn County, KS, Lyon County, KS, Miami County, KS, Mitchell County, KS, Morris County, KS, Osage County, KS, Ottawa County, KS, Pottawatomie County, KS, Republic County, KS, Riley County, KS, Saline County, KS, Shawnee County, KS, Wabaunsee County, KS, Washington County, KS, Woodson County, KS, Wyandotte County, KS, Bates County, MO, Cass County, MO, Jackson County, MO, Vernon County, MO
The radar
The Topeka radar (KTWX), 48 km from the middle of the area, began a volume at 14:19 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.
The nearest sounding before it
Topeka, KS (KTOP), launched 12:00Z, 2.3 hours before the alert went out and 53 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
- 226 J/kg
- Mixed-layer CIN
- -381 J/kg
- Mixed-layer LCL
- 1158 m above ground
- 0-6 km bulk shear
- 27 kt
- 0-1 km storm-relative helicity
- 7 m²/s²
- 0-3 km storm-relative helicity
- 58 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- -0.2
The text
As transmitted, in the capitals the NWS used until 2016.
298
ACUS11 KWNS 241419
SWOMCD
SPC MCD 241418
MOZ000-KSZ000-241545-
MESOSCALE DISCUSSION 0921
NWS STORM PREDICTION CENTER NORMAN OK
0918 AM CDT TUE MAY 24 2011
AREAS AFFECTED...NRN AND CNTRL KS
CONCERNING...SEVERE THUNDERSTORM WATCH 353...
VALID 241418Z - 241545Z
THE SEVERE WEATHER THREAT FOR SEVERE THUNDERSTORM WATCH 353
CONTINUES.
AN ISOLATED THREAT FOR DAMAGING WIND GUSTS AND A POTENTIAL FOR HAIL
WILL EXIST IN NRN KS. THE THREAT SHOULD DEVELOP EWD INTO NE KS AND
MAY AFFECT WRN MO BY EARLY THIS AFTERNOON. WW ISSUANCE REMAINS
POSSIBLE DOWNSTREAM OF WW 353.
A WELL-DEVELOPED BOWING LINE-SEGMENT IN NRN KS IS JUST AHEAD OF A
PRONOUNCED SHORTWAVE TROUGH EVIDENT ON WATER VAPOR IMAGERY. THE LINE
IS LOCATED ON THE NWRN EDGE OF A POCKET OF MODERATE TO STRONG
INSTABILITY WHERE MUCAPE VALUES ARE ESTIMATED TO BE IN THE 2000 TO
3000 J/KG RANGE. THE LINE IS PRIMARILY ELEVATED BUT COULD HAVE AN
ISOLATED WIND DAMAGE THREAT AS THE LINE MOVES ESEWD ALONG THE
INSTABILITY GRADIENT OVER THE NEXT FEW HOURS. IN ADDITION...THE
WSR-88 VWP IN TOPEKA HAS ABOUT 40 KT OF 0-6 KM SHEAR AND
MESOANALYSIS SHOWS A PLUME OF STEEP MID-LEVEL LAPSE RATES ACROSS
MOST OF KS. THIS ENVIRONMENT SHOULD ALSO BE FAVORABLE FOR A HAIL
THREAT WITH THE MORE INTENSE CELLS WITHIN THE LINE.
..BROYLES.. 05/24/2011
...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT...
ATTN...WFO...SGF...EAX...TOP...ICT...GID...
LAT...LON 39999868 39659551 39129430 38569381 37799411 37589460
37659516 37809552 37899578 38369691 38939872 39999868SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 24, 2:24 AM CDT | Mesoscale Discussion | SPC | Cheyenne, Decatur, Ellis, Gove, Graham, Hodgeman and 12 more | 96 min |
| May 24, 2:42 AM CDT | Severe Thunderstorm Watch | SPC | Cheyenne, Decatur, Ellis, Gove, Graham, Greeley and 15 more | 4 hr |
| May 24, 6:21 AM CDT | Mesoscale Discussion | SPC | Barton, Chase, Clay, Cloud, Dickinson, Edwards and 25 more | 54 min |
| May 24, 6:51 AM CDT | Severe Thunderstorm Watch | SPC | Barton, Brown, Butler, Chase, Clay, Cloud and 37 more | 5 hr |
| May 24, 10:37 AM CDT | Mesoscale Discussion | SPC | Cheyenne, Rawlins, Sherman, Thomas | 83 min |
| May 24, 12:59 PM CDT | Mesoscale Discussion | SPC | Barton, Edwards, Ellis, Ellsworth, Finney, Ford and 26 more | 91 min |
| May 24, 1:27 PM CDT | Tornado Watch | SPC | Barber, Clark, Comanche, Edwards, Ellis, Finney and 30 more | 6 hr |
| May 24, 2:35 PM CDT | Mesoscale Discussion | SPC | Barber, Barton, Butler, Chase, Chautauqua, Coffey and 27 more | 85 min |
| May 24, 3:14 PM CDT | Tornado Watch | SPC | Allen, Barton, Butler, Chase, Chautauqua, Cowley and 20 more | 9 hr |
| May 24, 5:03 PM CDT | Mesoscale Discussion | SPC | Clay, Cloud, Dickinson, Geary, Jewell, Lincoln and 11 more | 57 min |
| May 24, 5:19 PM CDT | Tornado Watch | SPC | Anderson, Brown, Clay, Cloud, Coffey, Dickinson and 23 more | 7 hr |
| May 24, 1:35 PM CDT | Mesoscale Discussion | SPC | Audrain, Boone, Caldwell, Callaway, Carroll, Chariton and 24 more | 25 min |
| May 24, 1:38 PM CDT | Severe Thunderstorm Watch | SPC | Audrain, Boone, Callaway, Carroll, Chariton, Cole and 27 more | 5 hr |
| May 24, 4:55 PM CDT | Mesoscale Discussion | SPC | Audrain, Boone, Callaway, Cole, Franklin, Gasconade and 16 more | 65 min |
Nearby
Mesoscale Discussions in Kansas, 2011Mesoscale Discussions in Missouri, 2011Every mesoscale discussion 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.