Alert archive / Missouri / Mesoscale Discussions in 2003

Mesoscale Discussion 504

April 19, 200315 counties in Kansas; 19 counties in Missouri

The Storm Prediction Center issued this mesoscale discussion at Apr 19, 2003, 4:58 PM CDT for 15 counties in Kansas; 19 counties in Missouri. It was in force for 92 min.

The area

The outline as issued.

The facts

Issued
Apr 19, 2003, 4:58 PM CDT (21:58 UTC)
Expired
Apr 19, 2003, 6:30 PM CDT
In force
92 min
Issued by
the Storm Prediction Center
All 34 counties

Anderson County, KS, Chase County, KS, Coffey County, KS, Douglas County, KS, Franklin County, KS, Greenwood County, KS, Jefferson County, KS, Johnson County, KS, Leavenworth County, KS, Linn County, KS, Lyon County, KS, Miami County, KS, Osage County, KS, Shawnee County, KS, Wyandotte County, KS, Bates County, MO, Buchanan County, MO, Caldwell County, MO, Carroll County, MO, Cass County, MO, Chariton County, MO, Clay County, MO, Clinton County, MO, Daviess County, MO, Grundy County, MO, Jackson County, MO, Johnson County, MO, Lafayette County, MO, Linn County, MO, Livingston County, MO, Platte County, MO, Ray County, MO, Saline County, MO, Sullivan County, MO

The radar

The Pleasant Hill radar (KEAX), 30 km from the middle of the area, began a volume at 21:59 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 watches that followed

Watches SPC issued over any of the same counties within four hours of this discussion.

The nearest sounding before it

Topeka, KS (KTOP), launched 12:00Z, 10.0 hours before the alert went out and 95 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.

Skew-T log-pSkew-T log-p diagram, Topeka, KS at 12:00Z on 2003-04-19Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Topeka, KS at 12:00Z on 2003-04-19The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 28 square meters per square second.1939587897Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
504 m above ground
0-6 km bulk shear
55 kt
0-1 km storm-relative helicity
28 m²/s²
0-3 km storm-relative helicity
173 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

837 
ACUS11 KWNS 192158
SWOMCD
SPC MCD 192158 
MOZ000-KSZ000-192330-

MESOSCALE DISCUSSION 0504
NWS STORM PREDICTION CENTER NORMAN OK
0458 PM CDT SAT APR 19 2003

AREAS AFFECTED...ECNTRL KS INTO NWRN/WCNTRL MO

CONCERNING...SEVERE THUNDERSTORM POTENTIAL 

VALID 192158Z - 192330Z

...TSTMS WILL EXPAND NEWD FROM SCNTRL/SERN KS INTO NWRN/WCNTRL MO
OVER THE NEXT FEW HOURS...

A WW WILL LIKELY BE ISSUED SOON.

INSTABILITY AXIS HAS EXPANDED NEWD ALONG/AHEAD OF COLD FRONT
ACROSS SERN KS INTO NWRN MO AND TSTMS ARE BEGINNING TO DEVELOP
NEWD FROM ACTIVITY OVER NCNTRL OK/SERN KS.  GIVEN FAVORABLE DEEP
LAYER SHEAR AND SOME DESTABILIZATION...SUPERCELLS WILL BE
POSSIBLE WITH LARGE HAIL AND DAMAGING WINDS.  ISOLD TORNADOES ARE
POSSIBLE WITH ANY ACTIVITY THAT DEVELOPS AHEAD OF THE COLD
FRONT...THOUGH MOST TSTMS SHOULD BE SLIGHTLY ELEVATED NORTH OF
THE BOUNDARY.


..RACY.. 04/19/2003

...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT...

ATTN...WFO...SGF...EAX...TOP...ICT...

38299674 39469544 40169356 40349315 39669248 39049288
38549361 37999456 37869628

SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Apr 18, 7:33 PM CDTMesoscale DiscussionSPCAtchison, Brown, Doniphan, Jefferson57 min
Apr 18, 11:08 PM CDTMesoscale DiscussionSPCButler, Chase, Coffey, Douglas, Franklin, Harvey and 12 more2 hr
Apr 19, 12:58 AM CDTMesoscale DiscussionSPCBarber, Comanche, Harper, Kingman, Sumner2 hr
Apr 19, 1:25 AM CDTSevere Thunderstorm WatchSPCBarber, Butler, Chautauqua, Comanche, Cowley, Edwards and 11 more7 hr
Apr 19, 3:18 AM CDTMesoscale DiscussionSPCBourbon, Chautauqua, Cherokee, Crawford, Labette, Montgomery and 2 more117 min
Apr 19, 4:52 AM CDTMesoscale DiscussionSPCBarber, Butler, Comanche, Cowley, Greenwood, Harper and 7 more113 min
Apr 19, 9:01 AM CDTMesoscale DiscussionSPCBourbon, Cherokee, Crawford, Labette, Linn3 hr
Apr 19, 1:10 PM CDTMesoscale DiscussionSPCBarber, Comanche, Harper, Kingman, Pratt, Sedgwick and 1 more2 hr
Apr 19, 1:15 PM CDTTornado WatchSPCBarber, Clark, Comanche, Cowley, Harper, Kingman and 2 more7 hr
Apr 19, 2:30 PM CDTTornado WatchSPCButler, Chautauqua, Cherokee, Cowley, Crawford, Elk and 4 more7 hr
Apr 19, 5:25 PM CDTSevere Thunderstorm WatchSPCAnderson, Coffey, Douglas, Franklin, Greenwood, Johnson and 7 more6 hr
Apr 19, 5:50 PM CDTMesoscale DiscussionSPCHarper, Kingman, Sumner85 min
Apr 19, 6:07 PM CDTMesoscale DiscussionSPCChautauqua, Cherokee, Cowley, Crawford, Elk, Labette and 3 more83 min
Apr 19, 6:55 PM CDTSevere Thunderstorm WatchSPCBourbon, Cherokee, Crawford5 hr

Nearby

Mesoscale Discussions in Missouri, 2003Mesoscale Discussions in Kansas, 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.