Alert archive / Kansas / Mesoscale Discussions in 2003
Mesoscale Discussion 2139
The Storm Prediction Center issued this mesoscale discussion at Aug 11, 2003, 1:50 AM CDT for 13 counties in Kansas; 8 counties in Oklahoma. It was in force for 2 hr.
The area
The outline as issued.
The facts
- Issued
- Aug 11, 2003, 1:50 AM CDT (06:50 UTC)
- Expired
- Aug 11, 2003, 4:15 AM CDT
- In force
- 2 hr
- Issued by
- the Storm Prediction Center
All 21 counties
Allen County, KS, Butler County, KS, Chautauqua County, KS, Cowley County, KS, Elk County, KS, Greenwood County, KS, Harvey County, KS, Marion County, KS, Montgomery County, KS, Neosho County, KS, Sedgwick County, KS, Sumner County, KS, Wilson County, KS, Grant County, OK, Kay County, OK, Noble County, OK, Nowata County, OK, Osage County, OK, Pawnee County, OK, Payne County, OK, Washington County, OK
The radar
The Wichita radar (KICT), 65 km from the middle of the area, began a volume at 06:53 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 00:00Z, 6.8 hours before the alert went out and 178 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
- 728 J/kg
- Mixed-layer CIN
- -26 J/kg
- Mixed-layer LCL
- 2131 m above ground
- 0-6 km bulk shear
- 32 kt
- 0-1 km storm-relative helicity
- 10 m²/s²
- 0-3 km storm-relative helicity
- 133 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 1.4
The text
As transmitted, in the capitals the NWS used until 2016.
352 ACUS11 KWNS 110650 SWOMCD SPC MCD 110650 KSZ000-OKZ000-110915- MESOSCALE DISCUSSION 2139 NWS STORM PREDICTION CENTER NORMAN OK 0150 AM CDT MON AUG 11 2003 AREAS AFFECTED...PORTIONS SERN/S-CENTRAL KS...N-CENTRAL/NERN OK CONCERNING...SEVERE THUNDERSTORM POTENTIAL VALID 110650Z - 110915Z MCS -- WITH MOST INTENSE CONVECTION NOW EXTENDING FROM BETWEEN MHK-SLN SEWD TOWARD CNU THEN OVER LINN COUNTY KS -- IS FCST TO MOVE SWD ACROSS ERN KS THROUGH 8Z WITH SW TURN POSSIBLE. ISOLATED LARGE HAIL IS POSSIBLE...ALONG WITH WINDS MAINLY BELOW 50 KT SEVERE CRITERIA BUT STILL CAPABLE OF MINOR DAMAGE. WW NOT ANTICIPATED ATTM. VWP/PROFILER WINDS AND MODEL FCST SOUNDINGS SUGGEST PRIMARY LIFT WILL OCCUR ALONG/ATOP OUTFLOW CURRENT...GIVEN FLOW AOB 10 KT LOWEST 3-4 KM AGL. IN ENVIRONMENT OF WEAK LOW LEVEL FLOW AND THERMODYNAMIC ADVECTIONS...ORIENTATION OF INSTABILITY/MOISTURE FIELDS WILL STRONGLY INFLUENCE PROPAGATION. 00Z RAOB ANALYSES AND SERIES OF RUC SOUNDINGS SUGGEST INCREASE IN ELEVATED LOW LEVEL MOISTURE AND MUCAPE WITH WWD EXTENT. THIS FAVORS MOTION/DEVELOPMENT ALONG WRN PORTION OF CONVECTIVE BAND AND SHIFT OF STRONGEST CONVECTIVE POTENTIAL TOWARD PORTIONS N-CENTRAL OK AS ACTIVITY APPROACHES BORDER. ELEVATED MUCAPE IN INFLOW-LAYER SHOULD BE IN 1000-1500 J/KG RANGE BETWEEN SLN-PNC-TUL...DROPPING TO BELOW 500 J/KG IN CNU/JLN AREA. ..EDWARDS.. 08/11/2003 ...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT... ATTN...WFO...SGF...EAX...TSA...TOP...ICT...OUN... 38879735 38029636 37849562 38069481 36149602 35999710 36669807 38289764
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 11, 2:06 PM CDT | Mesoscale Discussion | SPC | Atoka, Bryan, Carter, Choctaw, Coal, Garvin and 7 more | 54 min |
| Aug 11, 4:45 PM CDT | Severe Thunderstorm Watch | SPC | Carter, Comanche, Cotton, Garvin, Jefferson, Johnston and 4 more | 5 hr |
Nearby
Mesoscale Discussions in Kansas, 2003Mesoscale Discussions in Oklahoma, 2003Every mesoscale discussion in 2003
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.