Alert archive / Missouri / Mesoscale Discussions in 2004

Mesoscale Discussion 2103

August 25, 200420 counties in Missouri

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.

Skew-T log-pSkew-T log-p diagram, Topeka, KS at 00:00Z on 2004-08-25Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 3663 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, Topeka, KS at 00:00Z on 2004-08-25The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 109 square meters per square second.19395878Sfc1 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
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

Open this sounding in Storm Lab

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.

IssuedProductOfficeCountiesLasted
Aug 24, 8:20 PM CDTSevere Thunderstorm WatchSPCAdair, Andrew, Atchison, Buchanan, Caldwell, Carroll and 26 more7 hr
Aug 24, 11:47 PM CDTMesoscale DiscussionSPCAndrew, Atchison, Buchanan, Caldwell, Carroll, Chariton and 22 more118 min
Aug 25, 8:50 AM CDTSevere Thunderstorm WatchSPCAndrew, Atchison, Buchanan, Daviess, DeKalb, Gentry and 6 more5 hr
Aug 25, 9:24 AM CDTMesoscale DiscussionSPCAdair, Andrew, Audrain, Bates, Benton, Boone and 48 more2 hr
Aug 25, 11:59 AM CDTMesoscale DiscussionSPCAdair, Andrew, Audrain, Boone, Buchanan, Caldwell and 47 more91 min
Aug 25, 12:35 PM CDTTornado WatchSPCAdair, Audrain, Boone, Caldwell, Callaway, Carroll and 33 more6 hr
Aug 25, 2:20 PM CDTTornado WatchSPCSaint Charles, Saint Louis, City of Saint Louis6 hr
Aug 25, 3:15 PM CDTSevere Thunderstorm WatchSPCCamden, Carter, Christian, Cole, Crawford, Dallas and 25 more6 hr
Aug 25, 4:50 PM CDTMesoscale DiscussionSPCBates, Cass, Clay, Jackson, Platte, Vernon85 min
Aug 25, 5:14 PM CDTMesoscale DiscussionSPCSaint Charles, Saint Louis, City of Saint Louis91 min
Aug 25, 5:15 PM CDTSevere Thunderstorm WatchSPCBates, Cass, Clay, Jackson, Platte5 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.