Alert archive / Kansas / Mesoscale Discussions in 2011
Mesoscale Discussion 377
The Storm Prediction Center issued this mesoscale discussion at Apr 8, 2011, 11:01 PM CDT for 15 counties in Kansas; 6 counties in Oklahoma. It was in force for 59 min.
The area
The outline as issued.
The facts
- Issued
- Apr 8, 2011, 11:01 PM CDT (04:01 UTC)
- Expired
- Apr 9, 2011, 12:00 AM CDT
- In force
- 59 min
- Issued by
- the Storm Prediction Center
All 21 counties
Allen County, KS, Anderson County, KS, Butler County, KS, Chautauqua County, KS, Cherokee County, KS, Coffey 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, Craig County, OK, Kay County, OK, Nowata County, OK, Osage County, OK, Ottawa County, OK, Washington County, OK
The radar
The Wichita radar (KICT), 115 km from the middle of the area, began a volume at 04:04 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
Lamont, OK (KLMN), launched 00:00Z, 4.0 hours before the alert went out and 134 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 3252 m above ground
- 0-6 km bulk shear
- 61 kt
- 0-1 km storm-relative helicity
- -13 m²/s²
- 0-3 km storm-relative helicity
- 80 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
198
ACUS11 KWNS 090401
SWOMCD
SPC MCD 090401
MOZ000-OKZ000-KSZ000-090500-
MESOSCALE DISCUSSION 0377
NWS STORM PREDICTION CENTER NORMAN OK
1101 PM CDT FRI APR 08 2011
AREAS AFFECTED...FAR NORTHERN OK AND SOUTHEAST/EAST-CENTRAL KS INTO
EXTREME SOUTHWEST MO
CONCERNING...TORNADO WATCH 108...
VALID 090401Z - 090500Z
THE SEVERE WEATHER THREAT FOR TORNADO WATCH 108 CONTINUES.
TORNADO WATCH 108 CONTINUES UNTIL 06Z...WITH THE PRIMARY SEVERE
THREAT GENERALLY FOCUSED ALONG THE NORTHERN OK/SOUTHERN KS BORDER
VICINITY.
A PERSISTENT SUPERCELL CONTINUES TO GRADUALLY ADVANCE EASTWARD
ACROSS FAR NORTHERN OK...NOW EAST OF I-35 IN KAY COUNTY AS OF 04Z.
IT IS ANTICIPATED THAT THE PRIMARY/MOST CONCENTRATED SEVERE THREAT
WILL REMAIN WITH THIS SUPERCELL ACROSS FAR NORTHEAST OK/PERHAPS
EXTREME SOUTHEAST KS. WHILE NEAR-SURFACE CINH CONTINUES TO GRADUALLY
INCREASE PER OBSERVATIONAL/OBJECTIVE ANALYSIS TRENDS...RELATIVELY
MOIST/UNSTABLE INFLOW IN THE PRESENCE OF STEEP MID LEVEL LAPSE
RATES...AND A STRONGLY SHEARED/HIGH HELICITY ENVIRONMENT /EFFECTIVE
SHEAR OF 50+ KT AND EFFECTIVE SRH AROUND 400 M2 PER S2/...WILL
SUPPORT STORM SUSTENANCE WITH A CONTINUED LARGE HAIL/BRIEF TORNADO
THREAT. IT IS POSSIBLE THAT SOME DEGREE OF UPSCALE GROWTH MAY OCCUR
/WITH A MODEST FORWARD ACCELERATION/ AND YIELD A CONTINUED SEVERE
HAIL/WIND THREAT EVENTUALLY TOWARD THE I-44 VICINITY OF FAR
NORTHEAST OK/EXTREME SOUTHEAST KS AND SOUTHWEST MO. FARTHER
NORTH...A RELATIVELY MORE CHAOTIC STORM MODE WILL LIKELY CONTINUE
WITH SPORADIC SEVERE HAIL/DAMAGING WINDS OTHERWISE REMAINING
POSSIBLE ACROSS SOUTHEAST/EAST-CENTRAL KS.
..GUYER.. 04/09/2011
...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT...
ATTN...WFO...SGF...EAX...TSA...TOP...ICT...OUN...
LAT...LON 36399654 36769736 37909709 38439636 38509527 36619443
36399654SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 8, 8:32 PM CDT | Mesoscale Discussion | SPC | Allen, Anderson, Bourbon, Butler, Chase, Chautauqua and 30 more | 88 min |
| Apr 8, 9:01 PM CDT | Severe Thunderstorm Watch | SPC | Allen, Atchison, Bourbon, Brown, Butler, Chautauqua and 35 more | 7 hr |
| Apr 8, 11:26 PM CDT | Mesoscale Discussion | SPC | Atchison, Bourbon, Doniphan, Douglas, Jackson, Jefferson and 7 more | 94 min |
| Apr 9, 1:52 AM CDT | Mesoscale Discussion | SPC | Cherokee | 53 min |
Nearby
Mesoscale Discussions in Kansas, 2011Mesoscale Discussions in Oklahoma, 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.