Alert archive / Kansas / Mesoscale Discussions in 2011
Mesoscale Discussion 1018
The Storm Prediction Center issued this mesoscale discussion at May 29, 2011, 4:36 PM CDT for 4 states. It was in force for 24 min.
The area
The outline as issued.
The facts
- Issued
- May 29, 2011, 4:36 PM CDT (21:36 UTC)
- Expired
- May 29, 2011, 5:00 PM CDT
- In force
- 24 min
- Issued by
- the Storm Prediction Center
All 55 counties
Fremont County, IA, Mills County, IA, Page County, IA, Barber County, KS, Barton County, KS, Brown County, KS, Clark County, KS, Clay County, KS, Cloud County, KS, Comanche County, KS, Dickinson County, KS, Edwards County, KS, Ellis County, KS, Ellsworth County, KS, Geary County, KS, Harper County, KS, Harvey County, KS, Jackson County, KS, Jewell County, KS, Kingman County, KS, Kiowa County, KS, Lincoln County, KS, Marion County, KS, Marshall County, KS, McPherson County, KS, Mitchell County, KS, Morris County, KS, Nemaha County, KS, Osborne County, KS, Ottawa County, KS, Pawnee County, KS, Pottawatomie County, KS, Pratt County, KS, Reno County, KS, Republic County, KS, Rice County, KS, Riley County, KS, Rush County, KS, Russell County, KS, Saline County, KS, Stafford County, KS, Wabaunsee County, KS, Washington County, KS, Atchison County, MO, Holt County, MO, Nodaway County, MO, Cass County, NE, Gage County, NE, Jefferson County, NE, Johnson County, NE, Nemaha County, NE, Otoe County, NE, Pawnee County, NE, Richardson County, NE, Thayer County, NE
The radar
The Wichita radar (KICT), 125 km from the middle of the area, began a volume at 21:36 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.
The watches that followed
Watches SPC issued over any of the same counties within four hours of this discussion.
The nearest sounding before it
Dodge City, (KDDC), launched 12:00Z, 9.6 hours before the alert went out and 193 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
- 90 J/kg
- Mixed-layer CIN
- -999 J/kg
- Mixed-layer LCL
- 1225 m above ground
- 0-6 km bulk shear
- 43 kt
- 0-1 km storm-relative helicity
- 269 m²/s²
- 0-3 km storm-relative helicity
- 278 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
233
ACUS11 KWNS 292137
SWOMCD
SPC MCD 292136
MOZ000-IAZ000-KSZ000-NEZ000-OKZ000-292200-
MESOSCALE DISCUSSION 1018
NWS STORM PREDICTION CENTER NORMAN OK
0436 PM CDT SUN MAY 29 2011
AREAS AFFECTED...PORTIONS KS...EXTREME SERN NEB...EXTREME NWRN
MO...EXTREME SWRN IA.
CONCERNING...SEVERE POTENTIAL...WATCH NEEDED SOON
VALID 292136Z - 292200Z
FAVORABLE CONDITIONS FOR SVR GUSTS/HAIL COVERED IN SPC MESOSCALE
DISCUSSION 1016 EXTEND NEWD ALONG DRYLINE TO ITS INTERSECTION WITH
WARM FRONT OVER W-CENTRAL KS...BETWEEN DDC/HYS. WW ISSUANCE WILL BE
COORDINATED BETWEEN THE SPC AND THE AFFECTED LOCAL NATIONAL WEATHER
SERVICE OFFICES SHORTLY FOR KS AND PANHANDLES PORTION OF THIS
REGION. WW ISSUANCE MAY BE NEEDED LATER THIS AFTERNOON FOR MO
VALLEY PORTION.
ADDITIONALLY...DEEPENING TOWERS ARE BEING OBSERVED FARTHER NE ALONG
SRN SEGMENT OF DOUBLE-STRUCTURED WARM FRONTAL ZONE...TOWARD SERN
NEB...AND POTENTIAL FOR TSTM INITIATION ALSO IS INCREASING ACROSS
THAT CORRIDOR. SUBCLOUD LAYERS ARE NOT AS HOT AND DEEPLY MIXED IN
SUPPORT OF DAMAGING DOWNDRAFT THREAT AS WITH DRYLINE AREA.
HOWEVER...RICHER LOW-LEVEL DEW POINTS OF 70S F AND STEEP MIDLEVEL
LAPSE RATES CONTRIBUTE TO MLCAPE 4000-5500 J/KG AMIDST AT LEAST
MRGLLY FAVORABLE DEEP-LAYER SHEAR...I.E. EFFECTIVE SHEAR MAGNITUDES
30-45 KT.
..EDWARDS.. 05/29/2011
...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT...
ATTN...WFO...DMX...EAX...OAX...TOP...ICT...OUN...GID...DDC...
AMA...
LAT...LON 36920003 37789973 39019975 40069796 41209571 40369453
38829622 37069820 36920003SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 29, 1:41 AM CDT | Mesoscale Discussion | SPC | Appanoose, Davis, Decatur, Jefferson, Monroe, Page and 5 more | 2 hr |
| May 29, 8:39 AM CDT | Mesoscale Discussion | SPC | Appanoose, Benton, Buchanan, Cedar, Clarke, Clinton and 28 more | 66 min |
| May 29, 8:53 AM CDT | Severe Thunderstorm Watch | SPC | Cedar, Clinton, Des Moines, Henry, Iowa, Jackson and 10 more | 6 hr |
| May 28, 9:27 PM CDT | Mesoscale Discussion | SPC | Greeley | 2 hr |
| May 29, 3:10 PM CDT | Mesoscale Discussion | SPC | Barber, Barton, Clark, Comanche, Edwards, Ellsworth and 6 more | 95 min |
| May 29, 4:48 PM CDT | Severe Thunderstorm Watch | SPC | Barber, Barton, Clark, Clay, Cloud, Comanche and 23 more | 6 hr |
| May 29, 6:35 PM CDT | Mesoscale Discussion | SPC | Barber, Barton, Clark, Clay, Cloud, Comanche and 29 more | 115 min |
Nearby
Mesoscale Discussions in Kansas, 2011Mesoscale Discussions in Nebraska, 2011Mesoscale Discussions in Iowa, 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.