Alert archive / Kansas / Mesoscale Discussions in 2012
Mesoscale Discussion 635
The Storm Prediction Center issued this mesoscale discussion at Apr 30, 2012, 5:19 PM CDT for 21 counties in Kansas; 9 counties in Oklahoma; 6 counties in Texas. It was in force for 56 min.
The area
The outline as issued.
The facts
- Issued
- Apr 30, 2012, 5:19 PM CDT (22:19 UTC)
- Expired
- Apr 30, 2012, 6:15 PM CDT
- In force
- 56 min
- Issued by
- the Storm Prediction Center
All 36 counties
Barber County, KS, Barton County, KS, Clark County, KS, Comanche County, KS, Edwards County, KS, Finney County, KS, Ford County, KS, Gray County, KS, Haskell County, KS, Hodgeman County, KS, Kingman County, KS, Kiowa County, KS, Lane County, KS, Meade County, KS, Ness County, KS, Pawnee County, KS, Pratt County, KS, Rush County, KS, Seward County, KS, Stafford County, KS, Trego County, KS, Alfalfa County, OK, Beaver County, OK, Beckham County, OK, Dewey County, OK, Ellis County, OK, Harper County, OK, Roger Mills County, OK, Woods County, OK, Woodward County, OK, Gray County, TX, Hemphill County, TX, Lipscomb County, TX, Ochiltree County, TX, Roberts County, TX, Wheeler County, TX
The radar
The Dodge City radar (KDDC), 53 km from the middle of the area, began a volume at 22:19 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 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, 10.3 hours before the alert went out and 48 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
- 83 J/kg
- Mixed-layer CIN
- -185 J/kg
- Mixed-layer LCL
- 764 m above ground
- 0-6 km bulk shear
- 46 kt
- 0-1 km storm-relative helicity
- 90 m²/s²
- 0-3 km storm-relative helicity
- 133 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.1
The text
As transmitted, in the capitals the NWS used until 2016.
630
ACUS11 KWNS 302219
SWOMCD
SPC MCD 302219
KSZ000-OKZ000-TXZ000-302315-
MESOSCALE DISCUSSION 0635
NWS STORM PREDICTION CENTER NORMAN OK
0519 PM CDT MON APR 30 2012
AREAS AFFECTED...PORTIONS SWRN/W-CENTRAL KS...NWRN OK.
CONCERNING...SEVERE THUNDERSTORM WATCH 210...
VALID 302219Z - 302315Z
THE SEVERE WEATHER THREAT FOR SEVERE THUNDERSTORM WATCH 210
CONTINUES.
INCREASE IN TSTM COVERAGE/INTENSITY IS FCST ACROSS THIS AREA DURING
REMAINDER LATE AFTERNOON INTO EVENING. POTENTIAL EXISTS FOR
SUPERCELLS WITH LARGE/DAMAGING HAIL AND SVR GUSTS. TORNADO
POTENTIAL ALSO MAY BE MAXIMIZED OVER PORTIONS SWRN KS INVOF FRONTAL
ZONE DESCRIBED BELOW...AND EVENTUALLY ERN PANHANDLES WITH CONVECTION
MOVING EWD FROM GESTATION ZONE NEAR DRYLINE. ADDITIONAL WW IS
LIKELY OVER SOME AREAS NE AND E OF WW 210.
SFC MESOANALYSIS SHOWS CYCLONE OVER SERN CO WITH WARM FRONT
EXTENDING ESEWD OVER SWRN KS AND NEAR CENTRAL PORTIONS KS/OK BORDER.
VIS IMAGERY SHOWS DISTINCTIVE CHANGE IN LOW-CLOUD CHARACTER FROM
SW-NE ACROSS WRN/NRN OK. THIS SIGNIFIED TRANSITION ZONE WHERE
WEAKENING OUTFLOW BOUNDARY FROM EARLIER CONVECTION IS MOVING NWD AND
WILL MERGE WITH WARM-FRONTAL ZONE. THESE BOUNDARIES BLEND TOGETHER
ATTM INVOF INFLECTION POINT OF WARM FRONT...NEAR DDC...AND THIS
MERGER AREA WILL PROPAGATE EWD ACROSS KS/OK BORDER REGION WITH TIME.
LOW-LEVEL SHEAR IS MAXIMIZED NEAR THAT INFLECTION...WITH EFFECTIVE
SRH 200-300 J/KG AND 50-KT EFFECTIVE SHEAR MAGNITUDES DERIVED FROM
FCST SOUNDINGS AND VWP DATA. EVEN N OF FRONT...MODIFIED RAOBS AND
FCST SOUNDINGS SUGGEST INFLOW PARCELS ARE BECOMING SFC-BASED FOR
TEMPS LOW-MID 70S F AND UPPER-50S DEW POINTS...YIELDING MLCAPE
1000-1500 J/KG OVER W-CENTRAL KS. BUOYANCY GETS SUBSTANTIALLY
LARGER FARTHER S ACROSS NERN PORTIONS WW 210 INTO NWRN OK...WITH SFC
TEMPS NEAR 80 AND DEW POINTS UPPER 50S TO LOW 60S CONTRIBUTING TO
MLCAPE 2000-3000 J/KG. LOW-LEVEL THETAE ADVECTION INTO DISCUSSION
AREA SHOULD CONTRIBUTE TO FURTHER DESTABILIZATION AMIDST INSOLATION
THAT REMAINS.
..EDWARDS.. 04/30/2012
...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT...
ATTN...WFO...ICT...OUN...DDC...GLD...AMA...
LAT...LON 37730109 38340100 38660076 38970027 38999972 38909924
38789874 38419848 38079828 37749813 37329811 37029811
36619836 36269860 35909903 35069989 35100102 37730109SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 29, 7:33 PM CDT | Mesoscale Discussion | SPC | Barber, Clark, Comanche, Edwards, Ford, Harper and 4 more | 87 min |
| Apr 29, 8:04 PM CDT | Severe Thunderstorm Watch | SPC | Allen, Bourbon, Butler, Chautauqua, Cherokee, Cowley and 14 more | 7 hr |
| Apr 29, 10:31 PM CDT | Mesoscale Discussion | SPC | Allen, Barber, Bourbon, Chautauqua, Cherokee, Comanche and 14 more | 119 min |
| Apr 30, 2:20 AM CDT | Mesoscale Discussion | SPC | Cherokee | 25 min |
| Apr 30, 2:58 PM CDT | Mesoscale Discussion | SPC | Grant, Haskell, Morton, Seward, Stanton, Stevens | 62 min |
| Apr 30, 3:36 PM CDT | Severe Thunderstorm Watch | SPC | Grant, Haskell, Meade, Morton, Seward, Stanton and 1 more | 7 hr |
| Apr 30, 5:42 PM CDT | Tornado Watch | SPC | Barber, Clark, Comanche, Edwards, Finney, Ford and 13 more | 7 hr |
| Apr 30, 6:55 PM CDT | Mesoscale Discussion | SPC | Allen, Barber, Bourbon, Butler, Chautauqua, Cherokee and 22 more | 2 hr |
| Apr 30, 12:38 AM CDT | Mesoscale Discussion | SPC | Roger Mills | 37 min |
| Apr 29, 7:23 PM CDT | Severe Thunderstorm Watch | SPC | Andrews, Bailey, Borden, Briscoe, Castro, Cochran and 14 more | 4 hr |
| Apr 29, 8:55 PM CDT | Severe Thunderstorm Watch | SPC | Armstrong, Carson, Collingsworth, Donley, Gray, Hemphill and 6 more | 6 hr |
| Apr 29, 10:04 PM CDT | Mesoscale Discussion | SPC | Armstrong, Borden, Briscoe, Carson, Castro, Childress and 29 more | 86 min |
| Apr 29, 10:50 PM CDT | Severe Thunderstorm Watch | SPC | Bailey, Borden, Castro, Cochran, Dawson, Garza and 11 more | 4 hr |
| Apr 30, 2:15 AM CDT | Mesoscale Discussion | SPC | Briscoe, Castro, Crosby, Dickens, Floyd, Garza and 5 more | 30 min |
| Apr 30, 2:08 PM CDT | Mesoscale Discussion | SPC | Crane, Ector, Midland, Pecos, Terrell, Upton | 97 min |
| Apr 30, 2:39 PM CDT | Severe Thunderstorm Watch | SPC | Borden, Brewster, Crane, Dawson, Ector, Howard and 12 more | 7 hr |
| Apr 30, 6:11 PM CDT | Mesoscale Discussion | SPC | Baylor, Borden, Callahan, Coke, Coleman, Concho and 48 more | 2 hr |
| Apr 30, 6:54 PM CDT | Severe Thunderstorm Watch | SPC | Archer, Baylor, Callahan, Coke, Coleman, Concho and 33 more | 6 hr |
Nearby
Mesoscale Discussions in Kansas, 2012Mesoscale Discussions in Oklahoma, 2012Mesoscale Discussions in Texas, 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.