SWODY1
SPC AC 181249
DAY 1 CONVECTIVE OUTLOOK
NWS STORM PREDICTION CENTER NORMAN OK
0749 AM CDT SUN OCT 18 2009
VALID 181300Z - 191200Z
...NO SVR TSTM AREAS FORECAST...
...SYNOPSIS...
LOW AMPLITUDE PROGRESSIVE RDG WILL PREVAIL FROM THE RCKYS INTO THE
PLNS THIS PERIOD...DOWNSTREAM FROM AMPLIFYING SHORTWAVE IMPULSE
APPROACHING THE PACIFIC CST...AND WEST OF DEEP TROUGH IN THE EAST.
TROUGH NOW OVER AB SHOULD REACH SRN MB THIS EVE AS ASSOCIATED COLD
FRONT SETTLES SLOWLY SE ACROSS THE NRN INTERMOUNTAIN REGION.
...NRN/WRN INTERMOUNTAIN REGION...
WEAK INSTABILITY SHOULD LIMIT TSTM DEVELOPMENT INVOF STALLING FRONT
OVER THE NRN/WRN INTERMOUNTAIN REGION THROUGH MOST OF THE DAY TODAY.
HOWEVER...BY LATE THIS AFTN/EVE...HEIGHT FALLS/ASCENT WITH LEAD
IMPULSE NOW ENTERING NW CA/SW ORE MAY SUPPORT DEVELOPMENT OF ISOLD
ELEVATED STORMS ALONG/N OF BOUNDARY OVER PARTS OF ID/ERN ORE/SW
MT/NRN NV AND NW UT. THIS ACTIVITY MAY PERSIST INTO EARLY MONDAY AS
THE IMPULSE AND LARGER SCALE TROUGH CONTINUE EWD.
...SE AZ/SW NM...
WEAK SLY LOW LVL FLOW WILL CONTINUE TO ADVECT MOISTURE NWD INTO
REGION AHEAD OF WEAK SRN STREAM DISTURBANCE VISIBLE IN WV DATA.
DESPITE RELATIVELY WARM MID/UPR LVL TEMPERATURES...SCTD TSTMS MAY
CONTINUE TO FORM...ESPECIALLY OVER THE HIGHER TERRAIN AND AT PEAK
HEATING.
..CORFIDI/JEWELL.. 10/18/2009
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