Alert archive / Missouri / Mesoscale Discussions in 2003
Mesoscale Discussion 989
The Storm Prediction Center issued this mesoscale discussion at May 14, 2003, 10:10 PM CDT for 5 states. It was in force for 2 hr.
The area
The outline as issued.
The facts
- Issued
- May 14, 2003, 10:10 PM CDT (03:10 UTC)
- Expired
- May 15, 2003, 12:15 AM CDT
- In force
- 2 hr
- Issued by
- the Storm Prediction Center
All 48 counties
Clay County, AR, Craighead County, AR, Greene County, AR, Lawrence County, AR, Mississippi County, AR, Poinsett County, AR, Randolph County, AR, Sharp County, AR, Alexander County, IL, Franklin County, IL, Hardin County, IL, Jackson County, IL, Johnson County, IL, Massac County, IL, Pope County, IL, Pulaski County, IL, Saline County, IL, Union County, IL, Williamson County, IL, Ballard County, KY, Caldwell County, KY, Carlisle County, KY, Crittenden County, KY, Fulton County, KY, Graves County, KY, Hickman County, KY, Livingston County, KY, Lyon County, KY, Marshall County, KY, McCracken County, KY, Bollinger County, MO, Butler County, MO, Cape Girardeau County, MO, Carter County, MO, Dunklin County, MO, Madison County, MO, Mississippi County, MO, New Madrid County, MO, Oregon County, MO, Pemiscot County, MO, Perry County, MO, Ripley County, MO, Scott County, MO, Stoddard County, MO, Wayne County, MO, Dyer County, TN, Lake County, TN, Obion County, TN
The radar
The Paducah radar (KPAH), 125 km from the middle of the area, began a volume at 03:13 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
Little Rock, AR (KLZK), launched 00:00Z, 3.2 hours before the alert went out and 216 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
- 136 J/kg
- Mixed-layer CIN
- -104 J/kg
- Mixed-layer LCL
- 898 m above ground
- 0-6 km bulk shear
- 65 kt
- 0-1 km storm-relative helicity
- 76 m²/s²
- 0-3 km storm-relative helicity
- 33 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.6
The text
As transmitted, in the capitals the NWS used until 2016.
492 ACUS11 KWNS 150311 SWOMCD SPC MCD 150310 KYZ000-ILZ000-TNZ000-MOZ000-ARZ000-150515- MESOSCALE DISCUSSION 0989 NWS STORM PREDICTION CENTER NORMAN OK 1010 PM CDT WED MAY 14 2003 AREAS AFFECTED...SRN MO/SRN IL/WRN KY/WRN TN/NE AR CONCERNING...SEVERE THUNDERSTORM WATCH 375... VALID 150310Z - 150515Z BROKEN LINE OF SEVERE STORMS WILL CONTINUE TO MOVE SEWD WITH THE POTENTIAL FOR VERY LARGE HAIL AND DAMAGING WINDS. CONVECTION IS ORIENTED ALONG AND TO THE SE OF THE INSTABILITY AXIS FROM SPRINGFIELD MO NE TO VERNON IL. MLCAPE ALONG THE AXIS IS AROUND 1500 J/KG AND THE CONVECTION WAS MOVING SEWD INTO WEAKER INSTABILITY. HOWEVER...THE CONVECTION SHOULD REMAIN INTENSE AS STRONG LARGE-SCALE FORCING CONTINUES TO INCREASE AHEAD OF A VORTICITY MAX EVIDENT IN WATER VAPOR IMAGERY ACROSS SRN IL-ECNTRL IL. DEEP LAYER SHEAR WAS AROUND 40 KT WHICH COMBINED WITH THE MODERATE INSTABILITY WILL PRODUCE A LARGE HAIL/WIND DAMAGE THREAT. STRONG LARGE-SCALE ASCENT AND COOL AIR ALOFT WITH 500 MB TEMPS OF -16 C...WILL MAKE VERY LARGE HAIL A POSSIBILITY. ..BROYLES.. 05/15/2003 ...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT... ATTN...WFO...PAH...MEG...LSX...LZK...SGF... 36439185 37579043 38208896 37168782 36138916 35439079
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 14, 7:36 PM CDT | Mesoscale Discussion | SPC | Hempstead, Howard, Little River, Miller, Pike, Polk and 1 more | 114 min |
| May 14, 9:20 PM CDT | Mesoscale Discussion | SPC | Ashley, Columbia, Lafayette, Miller, Union | 115 min |
| May 14, 8:15 PM CDT | Mesoscale Discussion | SPC | Franklin, Gallatin, Hamilton, Hardin, Jackson, Jefferson and 12 more | 60 min |
| May 14, 8:30 PM CDT | Severe Thunderstorm Watch | SPC | Alexander, Clay, Clinton, Edwards, Franklin, Gallatin and 21 more | 4 hr |
| May 14, 9:24 PM CDT | Mesoscale Discussion | SPC | Clark, Clay, Coles, Crawford, Cumberland, Douglas and 7 more | 96 min |
| May 15, 6:52 AM CDT | Mesoscale Discussion | SPC | Adair, Allen, Barren, Bell, Boyle, Breathitt and 68 more | 2 hr |
| May 15, 10:15 AM CDT | Severe Thunderstorm Watch | SPC | Anderson, Bath, Boone, Bourbon, Boyle, Bracken and 53 more | 6 hr |
| May 15, 12:22 PM CDT | Mesoscale Discussion | SPC | Adair, Barren, Bell, Boyle, Breathitt, Casey and 37 more | 53 min |
| May 15, 12:50 PM CDT | Severe Thunderstorm Watch | SPC | Adair, Barren, Bell, Boyle, Breathitt, Casey and 41 more | 5 hr |
| May 15, 2:20 PM CDT | Mesoscale Discussion | SPC | Adair, Allen, Anderson, Barren, Bath, Bell and 90 more | 85 min |
| May 15, 4:42 PM CDT | Mesoscale Discussion | SPC | Allen, Caldwell, Calloway, Christian, Graves, Logan and 9 more | 63 min |
| May 15, 5:10 PM CDT | Severe Thunderstorm Watch | SPC | Allen, Christian, Logan, Monroe, Simpson, Todd and 1 more | 6 hr |
| May 15, 11:08 AM CDT | Mesoscale Discussion | SPC | Carter, Johnson | 2 hr |
| May 15, 3:10 PM CDT | Severe Thunderstorm Watch | SPC | Carter, Cocke, Greene, Hamblen, Jefferson, Sevier and 2 more | 6 hr |
| May 15, 5:06 PM CDT | Mesoscale Discussion | SPC | Carter, Cocke, Greene, Hamblen, Jefferson, Sevier and 2 more | 84 min |
| May 15, 6:39 PM CDT | Mesoscale Discussion | SPC | Sevier | 2 hr |
Nearby
Mesoscale Discussions in Missouri, 2003Mesoscale Discussions in Illinois, 2003Mesoscale Discussions in Kentucky, 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.