Alert archive / Kansas / Mesoscale Discussions in 2012
Mesoscale Discussion 741
The Storm Prediction Center issued this mesoscale discussion at May 6, 2012, 9:55 PM CDT for 15 counties in Kansas; 5 counties in Missouri; 4 counties in Oklahoma. It was in force for 65 min.
The area
The outline as issued.
The facts
- Issued
- May 6, 2012, 9:55 PM CDT (02:55 UTC)
- Expired
- May 6, 2012, 11:00 PM CDT
- In force
- 65 min
- Issued by
- the Storm Prediction Center
All 24 counties
Allen County, KS, Anderson County, KS, Bourbon County, KS, Chautauqua County, KS, Cherokee County, KS, Cowley County, KS, Crawford County, KS, Elk County, KS, Labette County, KS, Linn County, KS, Miami County, KS, Montgomery County, KS, Neosho County, KS, Wilson County, KS, Woodson County, KS, Barton County, MO, Bates County, MO, Cass County, MO, Jasper County, MO, Vernon County, MO, Craig County, OK, Nowata County, OK, Ottawa County, OK, Washington County, OK
The radar
The Tulsa radar (KINX), 127 km from the middle of the area, began a volume at 02:59 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
Springfield, MO (KSGF), launched 00:00Z, 2.9 hours before the alert went out and 155 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
- 768 J/kg
- Mixed-layer CIN
- -171 J/kg
- Mixed-layer LCL
- 1686 m above ground
- 0-6 km bulk shear
- 14 kt
- 0-1 km storm-relative helicity
- 16 m²/s²
- 0-3 km storm-relative helicity
- 47 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
852
ACUS11 KWNS 070255
SWOMCD
SPC MCD 070255
MOZ000-OKZ000-KSZ000-070400-
MESOSCALE DISCUSSION 0741
NWS STORM PREDICTION CENTER NORMAN OK
0955 PM CDT SUN MAY 06 2012
AREAS AFFECTED...SERN KS...SWRN MO...NERN OK
CONCERNING...SEVERE THUNDERSTORM WATCH 259...
VALID 070255Z - 070400Z
THE SEVERE WEATHER THREAT FOR SEVERE THUNDERSTORM WATCH 259
CONTINUES.
SUMMARY...WW 259 IS SCHEDULED TO EXPIRE AT 04Z. STRONG TSTMS SHOULD
PERSIST ALONG COMPOSITE OUTFLOW/COLD FRONT FOR SEVERAL HOURS...BUT
OVERALL SEVERE THREAT SHOULD REMAIN TOO MARGINAL FOR A NEW WW
ISSUANCE.
DISCUSSION...LEADING EDGE OF CONVECTIVE LINE PRESENT ALONG A COLD
FRONT EXTENDED FROM AROUND 40 S OJC TO 20 PNC AS OF 0230Z. AN
INCREASE IN LOW-LEVEL SLYS TO BETWEEN 25-30 KT HAS BEEN NOTED IN
SGF/INX VWP DATA WHICH SHOULD AID IN SUSTAINING TSTMS GIVEN A
PERSISTENT INFLUX OF A CONVECTIVELY UNDISTURBED AIR MASS OVER FAR
SERN KS AND ERN OK CHARACTERIZED BY UPPER 60S TO LOWER 70S SURFACE
DEW POINTS. STILL...WITH ONLY MODEST MID/HIGH-LEVEL SWLYS PER THE
NEODESHA KS PROFILER AND ORIENTATION OF DEEP-LAYER FLOW PARALLELING
THE FRONT...ALONG WITH WEAKENING LOW-LEVEL LAPSE RATES...THIS LINE
SHOULD STRUGGLE TO INTENSIFY. ALTHOUGH A LOCALIZED MICROBURST CANNOT
BE RULED OUT GIVEN A STRONGLY BUOYANT UPDRAFT...THIS THREAT APPEARS
TOO MARGINAL TO WARRANT A NEW WW ISSUANCE.
..GRAMS.. 05/07/2012
...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT...
ATTN...WFO...SGF...EAX...TSA...TOP...ICT...OUN...
LAT...LON 37059701 37849631 38619485 38679416 37989390 37309407
36709457 36609491 36519560 36649639 36859688 37059701SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 6, 7:24 PM CDT | Mesoscale Discussion | SPC | Allen, Anderson, Bourbon, Coffey, Franklin, Johnson and 4 more | 96 min |
| May 7, 5:21 PM CDT | Severe Thunderstorm Watch | SPC | McCurtain | 5 hr |
Nearby
Mesoscale Discussions in Kansas, 2012Mesoscale Discussions in Missouri, 2012Mesoscale Discussions in Oklahoma, 2012Every mesoscale discussion in 2012
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.