Alert archive / Kansas / Mesoscale Discussions in 2003
Mesoscale Discussion 628
The Storm Prediction Center issued this mesoscale discussion at Apr 29, 2003, 7:56 PM CDT for 16 counties in Kansas; 4 counties in Nebraska. It was in force for 2 hr.
The area
The outline as issued.
The facts
- Issued
- Apr 29, 2003, 7:56 PM CDT (00:56 UTC)
- Expired
- Apr 29, 2003, 10:00 PM CDT
- In force
- 2 hr
- Issued by
- the Storm Prediction Center
Counties Clay County, KS, Cloud County, KS, Decatur County, KS, Graham County, KS, Jewell County, KS, Mitchell County, KS, Norton County, KS, Osborne County, KS, Ottawa County, KS, Phillips County, KS, Republic County, KS, Riley County, KS, Rooks County, KS, Sheridan County, KS, Smith County, KS, Washington County, KS, Franklin County, NE, Furnas County, NE, Harlan County, NE, Red Willow County, NE
The radar
The Grand Island radar (KUEX), 109 km from the middle of the area, began a volume at 00:58 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 00:00Z, 0.9 hours before the alert went out and 205 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
- 1367 J/kg
- Mixed-layer CIN
- -21 J/kg
- Mixed-layer LCL
- 2276 m above ground
- 0-6 km bulk shear
- 29 kt
- 0-1 km storm-relative helicity
- 83 m²/s²
- 0-3 km storm-relative helicity
- 164 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 2.9
The text
As transmitted, in the capitals the NWS used until 2016.
445 ACUS11 KWNS 300057 SWOMCD SPC MCD 300056 KSZ000-NEZ000-300300- MESOSCALE DISCUSSION 0628 NWS STORM PREDICTION CENTER NORMAN OK 0756 PM CDT TUE APR 29 2003 AREAS AFFECTED...KS/NEB BORDER REGION CONCERNING...TORNADO WATCH 181... VALID 300056Z - 300300Z TSTMS RAPIDLY DEVELOPING OVER FRANKLIN COUNTY NEB AND SMITH/PHILLIPS COUNTY BORDER IN KS SHOULD BECOME SUPERCELLS AND PRODUCE SEVERE HAIL/WIND. TORNADO POTENTIAL ALSO EXISTS WITH LCL LOWERING AND INCREASING SR INFLOW. ANOTHER WW MAY BE REQUIRED CLOSE TO EXPIRATION TIME OF WW 181. NEWLY FORMED ACTIVITY IS IN MERIDIONAL ZONE OF ENHANCED LOW LEVEL CONVERGENCE ON MESO-BETA SCALE WHERE AN OLD HCR INTERSECTS FRONTAL ZONE. POTENTIAL EXISTS FOR ADDITIONAL DEVELOPMENT IN THIS CORRIDOR AS WELL AS ELSEWHERE INVOF FRONT -- WHICH IS ANALYZED ACROSS NRN TIER KS COUNTIES ATTM. ALTHOUGH OBSERVED TOP/LBF/DDC RAOBS ARE RATHER DISTANT AND DO NOT APPEAR REPRESENTATIVE OF NEAR-FRONTAL ENVIRONMENT...THEY CONFIRM STEEP LAPSE RATES AND SUFFICIENT MIDLEVEL FLOW ACROSS REGION TO SUPPORT SUPERCELL POTENTIAL. MODIFIED RUC SOUNDINGS SHOW MLCAPE 2000-3000 J/KG AND STRONG VEERING WITH HEIGHT ALONG FRONT...ESPECIALLY IN 0-1 KM AGL LAYER WHERE SRH NEAR 200 J/KG IS CALCULATED. ..EDWARDS.. 04/30/2003 ...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT... ATTN...WFO...OAX...TOP...ICT...GID...LBF...DDC...GLD... 39090086 40390087 39989672 39129672
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 29, 8:45 PM CDT | Severe Thunderstorm Watch | SPC | Brown, Cheyenne, Clay, Cloud, Decatur, Dickinson and 29 more | 5 hr |
| Apr 29, 10:29 PM CDT | Mesoscale Discussion | SPC | Brown, Cheyenne, Clay, Cloud, Decatur, Dickinson and 28 more | 2 hr |
| Apr 30, 1:22 AM CDT | Mesoscale Discussion | SPC | Decatur, Norton, Phillips, Rawlins | 113 min |
| Apr 30, 1:49 AM CDT | Mesoscale Discussion | SPC | Decatur, Norton, Phillips, Rawlins | 116 min |
| Apr 30, 2:49 PM CDT | Mesoscale Discussion | SPC | Atchison, Brown, Clay, Dickinson, Doniphan, Geary and 13 more | 116 min |
| Apr 30, 3:28 PM CDT | Mesoscale Discussion | SPC | Greeley, Wallace, Wichita | 92 min |
| Apr 30, 5:15 PM CDT | Tornado Watch | SPC | Doniphan, Johnson, Leavenworth, Wyandotte | 6 hr |
| Apr 30, 6:29 PM CDT | Mesoscale Discussion | SPC | Butler, Chase, Coffey, Cowley, Elk, Franklin and 11 more | 91 min |
| Apr 29, 7:00 PM CDT | Mesoscale Discussion | SPC | Adams, Boone, Buffalo, Burt, Butler, Cass and 31 more | 3 hr |
| Apr 29, 7:30 PM CDT | Severe Thunderstorm Watch | SPC | Adams, Antelope, Boone, Buffalo, Burt, Butler and 46 more | 7 hr |
| Apr 29, 10:40 PM CDT | Mesoscale Discussion | SPC | Adams, Antelope, Boone, Buffalo, Burt, Butler and 45 more | 2 hr |
Nearby
Mesoscale Discussions in Kansas, 2003Mesoscale Discussions in Nebraska, 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.