Alert archive / Missouri / Mesoscale Discussions in 2003

Mesoscale Discussion 920

May 10, 200314 counties in Arkansas; 22 counties in Missouri

The Storm Prediction Center issued this mesoscale discussion at May 10, 2003, 3:30 PM CDT for 14 counties in Arkansas; 22 counties in Missouri. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued
May 10, 2003, 3:30 PM CDT (20:30 UTC)
Expired
May 10, 2003, 5:30 PM CDT
In force
2 hr
Issued by
the Storm Prediction Center
All 36 counties

Baxter County, AR, Boone County, AR, Cleburne County, AR, Fulton County, AR, Izard County, AR, Johnson County, AR, Logan County, AR, Marion County, AR, Newton County, AR, Pope County, AR, Scott County, AR, Searcy County, AR, Stone County, AR, Van Buren County, AR, Crawford County, MO, Dent County, MO, Douglas County, MO, Franklin County, MO, Gasconade County, MO, Howell County, MO, Iron County, MO, Jefferson County, MO, Maries County, MO, Montgomery County, MO, Oregon County, MO, Osage County, MO, Ozark County, MO, Phelps County, MO, Pulaski County, MO, Reynolds County, MO, Shannon County, MO, Taney County, MO, Texas County, MO, Warren County, MO, Washington County, MO, Wright County, MO

The radar

The Springfield radar (KSGF), 105 km from the middle of the area, began a volume at 20:32 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

Springfield, MO (KSGF), launched 12:00Z, 8.5 hours before the alert went out and 129 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, Springfield, MO at 12:00Z on 2003-05-10Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1867 joules per kilogram.LCLLFCEL10008507005003002001001 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, Springfield, MO at 12:00Z on 2003-05-10The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 296 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
1867 J/kg
Mixed-layer CIN
-15 J/kg
Mixed-layer LCL
689 m above ground
0-6 km bulk shear
53 kt
0-1 km storm-relative helicity
296 m²/s²
0-3 km storm-relative helicity
300 m²/s²
Significant tornado parameter
3.5
Supercell composite
12.5

Open this sounding in Storm Lab

The text

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

221 
ACUS11 KWNS 102031
SWOMCD
SPC MCD 102030 
ILZ000-MOZ000-ARZ000-102230-

MESOSCALE DISCUSSION 0920
NWS STORM PREDICTION CENTER NORMAN OK
0330 PM CDT SAT MAY 10 2003

AREAS AFFECTED...NWRN/NRN AR...SRN/ERN MO

CONCERNING...SEVERE THUNDERSTORM POTENTIAL 

VALID 102030Z - 102230Z

...TORNADO WATCH WILL BE ISSUED SHORTLY FOR PORTIONS OF MO AND NRN
AR...

AIR MASS CONTINUES TO DESTABILIZE ACROSS MUCH OF MO AND AR AHEAD OF
ONGOING SUPERCELL ACTIVITY FARTHER WEST.  THESE STORMS ARE
PROGRESSING STEADILY NEWD AND WILL SOON AFFECT MUCH OF CENTRAL/ERN
MO...SWD INTO CENTRAL AR.  CONDITIONS APPEAR VERY FAVORABLE FOR
TORNADOES AND A WATCH WILL BE ISSUED SOON.

..DARROW.. 05/10/2003

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

ATTN...WFO...PAH...MEG...LSX...LZK...SGF...TSA...

34809413 38159219 39349140 38169032 35529196

SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
May 10, 10:54 AM CDTMesoscale DiscussionSPCBaxter, Benton, Boone, Carroll, Fulton, Izard and 7 more66 min
May 10, 11:55 AM CDTTornado WatchSPCBenton, Carroll, Crawford, Madison, Sebastian, Washington7 hr
May 10, 1:59 PM CDTMesoscale DiscussionSPCBenton, Carroll, Crawford, Franklin, Madison, Sebastian and 1 more2 hr
May 10, 4:00 PM CDTTornado WatchSPCBaxter, Boone, Clay, Cleburne, Conway, Craighead and 22 more5 hr
May 9, 7:47 PM CDTMesoscale DiscussionSPCAudrain, Barton, Bates, Benton, Boone, Callaway and 42 more88 min
May 9, 10:04 PM CDTMesoscale DiscussionSPCAdair, Andrew, Audrain, Barton, Bates, Benton and 55 more26 min
May 9, 11:00 PM CDTSevere Thunderstorm WatchSPCAdair, Barton, Bates, Benton, Caldwell, Carroll and 36 more6 hr
May 10, 1:15 AM CDTSevere Thunderstorm WatchSPCAndrew5 hr
May 10, 1:22 AM CDTMesoscale DiscussionSPCNewton83 min
May 10, 2:28 AM CDTMesoscale DiscussionSPCAndrew, Buchanan92 min
May 10, 3:05 AM CDTTornado WatchSPCBarton, Bates, Benton, Cedar, Dade, Henry and 7 more5 hr
May 10, 3:15 AM CDTSevere Thunderstorm WatchSPCAdair, Andrew, Atchison, Buchanan, Caldwell, Carroll and 25 more5 hr
May 10, 5:27 AM CDTMesoscale DiscussionSPCBarton, Bates, Benton, Cass, Cedar, Dade and 9 more93 min
May 10, 5:43 AM CDTMesoscale DiscussionSPCAudrain, Boone, Callaway, Clark, Knox, Lewis and 11 more92 min
May 10, 5:50 AM CDTSevere Thunderstorm WatchSPCAudrain, Boone, Callaway, Clark, Cole, Franklin and 19 more5 hr
May 10, 7:06 AM CDTMesoscale DiscussionSPCAdair, Andrew, Atchison, Buchanan, Caldwell, Carroll and 25 more54 min
May 10, 9:25 AM CDTMesoscale DiscussionSPCIron, Jefferson, Madison, Perry, Sainte Genevieve, Saint Francois and 1 more2 hr
May 10, 10:58 AM CDTMesoscale DiscussionSPCAdair, Andrew, Audrain, Barton, Bates, Benton and 42 more2 hr
May 10, 11:35 AM CDTTornado WatchSPCAdair, Audrain, Bates, Benton, Boone, Caldwell and 38 more7 hr
May 10, 1:42 PM CDTMesoscale DiscussionSPCAdair, Audrain, Bates, Benton, Boone, Caldwell and 38 more2 hr
May 10, 3:17 PM CDTMesoscale DiscussionSPCClark, Schuyler, Scotland58 min
May 10, 3:50 PM CDTTornado WatchSPCPutnam, Schuyler, Scotland6 hr
May 10, 4:48 PM CDTMesoscale DiscussionSPCAdair, Audrain, Benton, Boone, Callaway, Chariton and 24 more87 min
May 10, 5:40 PM CDTTornado WatchSPCAdair, Audrain, Benton, Boone, Callaway, Chariton and 32 more5 hr
May 10, 6:41 PM CDTMesoscale DiscussionSPCAudrain, Boone, Callaway, Cole, Cooper, Lewis and 13 more64 min

Nearby

Mesoscale Discussions in Missouri, 2003Mesoscale Discussions in Arkansas, 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.