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Fire Weather Forecast (Polk County)

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LAST UPDATED: 233 PM CDT TUE APR 22 2014

.DISCUSSION... DRIER AIR HAS MOVED INTO THE STATE THIS AFTERNOON
BEHIND A COLD FRONT THAT MOVED THROUGH THE STATE OVERNIGHT.
RECENT RAINFALL HAS KEPT WILD FIRE ISSUES LOW HOWEVER. DRY AIR
WILL REMAIN IN PLACE FOR WED...EVEN AS SOUTHERLY WINDS RETURN.
AFTERNOON MIN RH VALUES WILL DROP BELOW 40 PERCENT IN MOST
LOCATIONS...WITH SOME POSSIBLY DROPPING BELOW 30 PERCENT. THE DRY
AIR WILL BE SHORT LIVED HOWEVER AS MOISTURE LEVELS INCREASE
SUBSTANTIALLY FOR THU AHEAD OF AN APPROACHING STORM SYSTEM. THIS
STORM SYSTEM WILL BRING ANOTHER CHANCES FOR SHOWERS AND
THUNDERSTORMS TO THE STATE FOR THU INTO THU NIGHT. A DRY DAY WILL
BE SEEN FOR MOST OF FRI...BUT MORE RAIN CHANCES RETURN FOR THE
WEEKEND INTO EARLY NEXT WEEK.

                      TONIGHT      WED          WED NIGHT    THU

CLOUD COVER           CLEAR        CLEAR        PCLDY        PCLDY        
CHANCE PRECIP (%)     0            0            0            40           
PRECIP TYPE           NONE         NONE         NONE         TSTRMS       
TEMP (24H TREND)      48 (-8)      79 (+5)      57           77           
MX/MN RH% (24H TREND) 89 (-10)     44 (+13)     88           56           
20FTWND-AM(MPH)                    E  3                      S  6         
20FTWND-PM(MPH)       LGT/VAR      SE  5        SE  5        SW  9        
PRECIP AMOUNT         0.00         0.00         0.00         0.16         
PRECIP DURATION       0            0            0            2            
MIXING HGT(FT-MSL)                 3972                      4241         
MIXING HGT(FT-AGL)                 2963                      3232         
CATEGORY DAY                       4                         4            
TRANSPORT WND (MPH)                SE 15                     SW 24        
VENT RATE (M/S-M)                  8477                      14223        
DISPERSION INDEX                   40                        58           
LVORI                 1                         1                         
HAINES INDEX          5            4            3            2            
STABILITY CLASS       F            B            E            B            
MIX HGT 500 (F)                    68                        69           

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