437 
FXUS63 KDMX 201531
AFDDSM

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE DES MOINES IA
1025 AM CDT FRI JUL 20 2001

WILL NEED TO UPDATE ZONES SHORTLY FOR FIRST PD  CHANGES.  TWO AREAS 
OF CONCERN...NRN AND SOUTHERN IA.  

SRN ZONES...SHOWERS AND A FEW THUNDERSTORMS OVR FAR SRN IA ATTM SHUD 
DECREASE AND END AS LOW LVL JET CONTINUES TO DECREASE.  EXPECT 
PLENTIFUL CLOUD COVER FM CONVECTIVE DEBRIS TDY.  MAY HAVE WDLY SCT 
TSTMS SW ZONES NEAR SUBTLE BOUNDARY AND A MOISTURE AND INSTIBILITY 
AXIS.             

NRN ZONES...AREA UNDER UVV FM ISENT LIFT AND APPROACHING S/WV AS PER 
WATER VAPOR IMAGERY.  MCS NORTH OF IA MAY HAVE ENOUGH PUSH TO REACH 
NRN IA THIS AFTERNOON.  ANOTHER BOUNDARY WAS NEAR NRN IA IN SRN MN.  
UVV AND PLENTIFUL MOISTURE AND CAPE SHUD RESULT IN SCT TSTMS OVR NRN 
ZONES.  WL WORD ACCORDINGLY.

NO CHANGES TO OUT PDS. 
.DSM...NONE
JOHNSON