Alert archive / Missouri / Mesoscale Discussions in 2004
Mesoscale Discussion 2103
The Storm Prediction Center issued this mesoscale discussion at Aug 25, 2004, 2:14 AM CDT for 20 counties in Missouri. It was in force for 31 min.
The area
The outline as issued.
The facts
- Issued
- Aug 25, 2004, 2:14 AM CDT (07:14 UTC)
- Expired
- Aug 25, 2004, 2:45 AM CDT
- In force
- 31 min
- Issued by
- the Storm Prediction Center
Counties Adair County, MO, Andrew County, MO, Buchanan County, MO, Caldwell County, MO, Chariton County, MO, Clinton County, MO, Daviess County, MO, DeKalb County, MO, Gentry County, MO, Grundy County, MO, Harrison County, MO, Linn County, MO, Livingston County, MO, Macon County, MO, Mercer County, MO, Nodaway County, MO, Putnam County, MO, Schuyler County, MO, Sullivan County, MO, Worth County, MO
The nearest sounding before it
Topeka, KS (KTOP), launched 00:00Z, 7.2 hours before the alert went out and 203 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
- 3663 J/kg
- Mixed-layer CIN
- -27 J/kg
- Mixed-layer LCL
- 862 m above ground
- 0-6 km bulk shear
- 24 kt
- 0-1 km storm-relative helicity
- 109 m²/s²
- 0-3 km storm-relative helicity
- 158 m²/s²
- Significant tornado parameter
- 1.6
- Supercell composite
- 7.5
The text
As transmitted, in the capitals the NWS used until 2016.
970 ACUS11 KWNS 250715 SWOMCD SPC MCD 250714 MOZ000-IAZ000-KSZ000-250745- MESOSCALE DISCUSSION 2103 NWS STORM PREDICTION CENTER NORMAN OK 0214 AM CDT WED AUG 25 2004 AREAS AFFECTED...NWRN MO CONCERNING...SEVERE THUNDERSTORM WATCH 780... VALID 250714Z - 250745Z WW 780 WILL EXPIRE AS SCHEDULED AT 08Z. NUMEROUS THUNDERSTORMS WERE LOCATED IN NERN MO...NORTH OF A WEAK SURFACE BOUNDARY THAT EXTENDED FROM NRN KS EWD INTO CENTRAL MO. VAD WIND PROFILES IN THE AREA INDICATED THAT A 35 KT LOW LEVEL JET WAS PROVIDING LIFT FOR CONVECTION. MODELS SHOW DRIER AIR SPREADING IN FROM THE SW...AND THE STORMS SHOULD CONTINUE TO SPREAD/DEVELOP NEWD THROUGHOUT THE MORNING HOURS. RUC FORECAST SOUNDINGS SUGGEST THAT THE STORM UPDRAFT BASES ARE NEAR 850 MB...WITH UNIDIRECTIONAL SWLY WINDS ABOVE THE CAPPING INVERSION. MUCAPES OF 2500-3000 J/KG AND THE DEEP SWLY FLOW MAY BE SUFFICIENT FOR A FEW ELEVATED BOWING STRUCTURES...BUT THE STABLE BOUNDARY LAYER SHOULD INHIBIT STRONGER DOWNDRAFTS FROM REACHING THE SURFACE. SINCE THE SEVERE THREAT SHOULD REMAIN VERY ISOLATED...NO ADDITIONAL WW ARE ANTICIPATED. ..IMY.. 08/25/2004 ...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT... ATTN...WFO...DVN...DMX...EAX... 39329259 39669481 40299519 40579503 40669338 40509230
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 24, 8:20 PM CDT | Severe Thunderstorm Watch | SPC | Adair, Andrew, Atchison, Buchanan, Caldwell, Carroll and 26 more | 7 hr |
| Aug 24, 11:47 PM CDT | Mesoscale Discussion | SPC | Andrew, Atchison, Buchanan, Caldwell, Carroll, Chariton and 22 more | 118 min |
| Aug 25, 8:50 AM CDT | Severe Thunderstorm Watch | SPC | Andrew, Atchison, Buchanan, Daviess, DeKalb, Gentry and 6 more | 5 hr |
| Aug 25, 9:24 AM CDT | Mesoscale Discussion | SPC | Adair, Andrew, Audrain, Bates, Benton, Boone and 48 more | 2 hr |
| Aug 25, 11:59 AM CDT | Mesoscale Discussion | SPC | Adair, Andrew, Audrain, Boone, Buchanan, Caldwell and 47 more | 91 min |
| Aug 25, 12:35 PM CDT | Tornado Watch | SPC | Adair, Audrain, Boone, Caldwell, Callaway, Carroll and 33 more | 6 hr |
| Aug 25, 2:20 PM CDT | Tornado Watch | SPC | Saint Charles, Saint Louis, City of Saint Louis | 6 hr |
| Aug 25, 3:15 PM CDT | Severe Thunderstorm Watch | SPC | Camden, Carter, Christian, Cole, Crawford, Dallas and 25 more | 6 hr |
| Aug 25, 4:50 PM CDT | Mesoscale Discussion | SPC | Bates, Cass, Clay, Jackson, Platte, Vernon | 85 min |
| Aug 25, 5:14 PM CDT | Mesoscale Discussion | SPC | Saint Charles, Saint Louis, City of Saint Louis | 91 min |
| Aug 25, 5:15 PM CDT | Severe Thunderstorm Watch | SPC | Bates, Cass, Clay, Jackson, Platte | 5 hr |
Nearby
Mesoscale Discussions in Missouri, 2004Every mesoscale discussion in 2004
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.