277  
FNUS73 KTOP 180939 CCA  
FWSTOP  
 
SPOT FORECAST FOR HOWE PROPERTY RX 2.0...CORRECTED  
NATIONAL WEATHER SERVICE TOPEKA KS  
439 AM CDT THU MAY 18 2023  
 
FORECAST IS BASED ON IGNITION TIME OF 0800 CDT ON MAY 18.  
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER  
SERVICE.  
   
DISCUSSION
 
 
CLOUD COVER INCREASES THIS MORNING AND AFTERNOON AHEAD OF A WEAK  
COLD FRONT SET TO MOVE THROUGH THIS EVENING. WINDS THIS MORNING  
START AROUND 5 MPH FROM THE SSW, AND THEY SHOULD STAY LIGHT AND  
MAINLY SOUTHERLY THROUGH THE AFTERNOON. A SHIFT TO THE WEST AND  
NORTHWEST IS EXPECTED BEHIND THE COLD FRONT THIS EVENING, THOUGH  
NO SIGNIFICANT CHANGES IN SPEED ARE FORECAST. MINIMUM RH FOR  
TODAY LOOKS TO BE AROUND 40 PERCENT THIS AFTERNOON BEFORE RECOVERY  
EARLY THIS EVENING. AS FOR PRECIPITATION CHANCES, THERE IS A  
SLIGHT CHANCE FOR SCATTERED SHOWERS AND THUNDERSTORMS TO DEVELOP  
NEAR THE SITE LATE THIS AFTERNOON AND EARLY THIS EVENING, ALTHOUGH  
THE GREATER CHANCES ARE FOCUSED DURING THE OVERNIGHT HOURS. RAIN  
SHOULD EXIT THE AREA FRIDAY MORNING. WINDS INCREASE FROM THE  
NORTH TO 10-20 MPH FOR THE DAYTIME HOURS FRIDAY.  
   
TODAY
 
 
SKY/WEATHER.........MOSTLY SUNNY. SLIGHT CHANCE OF SHOWERS AND  
THUNDERSTORMS LATE IN THE AFTERNOON.  
CHANCE OF PCPN......20 PERCENT.  
TEMPERATURE.........60 AT IGNITION...MAX 81.  
RH..................84 PERCENT AT IGNITION...MIN 39 PERCENT.  
WIND (20 FT)........  
SLOPE/VALLEY.......WINDS SOUTHWEST AT 5 MPH AT  
IGNITION...OTHERWISE LIGHT WINDS BECOMING SOUTH  
AROUND 5 MPH EARLY IN THE MORNING. GUSTY AND  
ERRATIC WINDS EXPECTED NEAR THUNDERSTORMS LATE  
IN THE AFTERNOON.  
MIXING HEIGHT.......500 FT AGL AT IGNITION...OTHERWISE 7100 FT AGL.  
SMOKE DISPERSAL.....POOR /3800 KNOT-FT/ AT IGNITION. MAX...GOOD  
/35500 KNOT-FT/.  
HAINES INDEX........4 OR LOW POTENTIAL FOR LARGE PLUME DOMINATED  
FIRE GROWTH AT IGNITION...MAX 5.  
 
TIME (CDT) 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM  
SKY COVER.......PC PC PC PC PC PC PC MC MC MC  
WEATHER COV..... SCH  
WEATHER TYPE.... RW  
TSTM COV........ SCH  
CHC OF PCPN (%).0 0 0 0 0 0 10 10 10 20  
TEMP............60 65 71 75 77 79 80 81 81 81  
RH..............84 75 63 55 48 44 41 39 39 39  
20 FT WIND DIR..SW SW SW S S S S S S S  
20 FT WIND SPD..5 5 5 5 5 5 5 5 5 5  
20 FT WIND GUST.7 8 9 9 8 7 6 7 8 7  
MIX HGT (KFT)...0.5 1.2 2.0 3.4 4.5 5.5 6.5 7.1 6.2 5.4  
HAINES INDEX....4 5 5 4 4 3 3 4 4 4  
SDSPL KT-FT/10004 10 20 24 31 28 33 36 31 33  
   
TONIGHT
 
 
SKY/WEATHER.........MOSTLY CLOUDY. CHANCE OF SHOWERS AND  
THUNDERSTORMS.  
CHANCE OF PCPN......50 PERCENT.  
TEMPERATURE.........MIN 59.  
RH..................MAX 97 PERCENT.  
WIND (20 FT)........  
SLOPE/VALLEY.......SOUTH WINDS AROUND 5 MPH SHIFTING TO THE WEST 5  
TO 6 MPH EARLY IN THE EVENING, THEN SHIFTING TO  
THE NORTH AROUND 5 MPH LATE IN THE EVENING  
BECOMING LIGHT OVERNIGHT BECOMING NORTH 5 TO 6  
MPH. GUSTY AND ERRATIC WINDS EXPECTED NEAR  
THUNDERSTORMS IN THE EVENING AND OVERNIGHT.  
GUSTY AND ERRATIC WINDS EXPECTED NEAR  
THUNDERSTORMS AFTER 3 AM.  
MIXING HEIGHT.......400 FT AGL.  
SMOKE DISPERSAL.....FAIR (28700 KNOT-FT) EARLY IN THE EVENING  
DECREASING TO POOR (2100 KNOT-FT) LATE IN THE  
NIGHT.  
HAINES INDEX........3 TO 5 OR VERY LOW TO MODERATE POTENTIAL FOR  
LARGE PLUME DOMINATED FIRE GROWTH.  
 
TIME (CDT) 6 PM 8 PM 10 PM MIDNGT 2 AM 4 AM  
SKY COVER.......MCLDY MCLDY MCLDY MCLDY MCLDY MCLDY  
WEATHER COV.....S CHC CHANCE CHANCE CHANCE CHANCE CHANCE  
WEATHER TYPE....RNSHWR RNSHWR RNSHWR RNSHWR RNSHWR RNSHWR  
TSTM COV........S CHC CHANCE CHANCE CHANCE CHANCE S CHC  
CHC OF PCPN (%).20 30 30 30 50 50  
TEMP............80 75 68 64 63 62  
RH..............42 52 68 81 87 93  
20 FT WIND DIR..S W NW N NW N  
20 FT WIND SPD..5 5 5 5 4 5  
20 FT WIND GUST.8 9 9 7 5 8  
MIX HGT (FT)....4100 400 400 500 400 500  
HAINES INDEX....5 4 3 3 3 3  
SDSPL KT-FT/100029 4 4 4 2 4  
   
FRIDAY
 
 
SKY/WEATHER.........PARTLY SUNNY THEN BECOMING SUNNY. CHANCE OF  
RAIN SHOWERS AND SLIGHT CHANCE OF THUNDERSTORMS  
EARLY IN THE MORNING.  
CHANCE OF PCPN......50 PERCENT.  
TEMPERATURE.........MAX 72.  
RH..................MIN 35 PERCENT.  
WIND (20 FT)........  
SLOPE/VALLEY.......NORTH WINDS 7 TO 13 MPH. GUSTY AND ERRATIC  
WINDS EXPECTED NEAR THUNDERSTORMS EARLY IN THE  
MORNING.  
MIXING HEIGHT.......4600 FT AGL.  
SMOKE DISPERSAL.....POOR (4200 KNOT-FT) EARLY IN THE MORNING  
INCREASING TO EXCELLENT (78500 KNOT-FT) IN THE  
AFTERNOON.  
HAINES INDEX........3 TO 4 OR VERY LOW TO LOW POTENTIAL FOR LARGE  
PLUME DOMINATED FIRE GROWTH.  
 
TIME (CDT) 6 AM 9 AM NOON 3 PM  
SKY COVER.......MCLDY MCLDY MCLDY PCLDY  
WEATHER COV.....CHANCE  
WEATHER TYPE....RNSHWR NONE NONE NONE  
TSTM COV........S CHC  
CHC OF PCPN (%).50 10 10 0  
TEMP............61 59 66 72  
RH..............97 83 54 39  
20 FT WIND DIR..N N N N  
20 FT WIND SPD..7 12 12 12  
20 FT WIND GUST.12 20 20 19  
MIX HGT (FT)....500 1500 2900 4300  
HAINES INDEX....3 4 4 3  
SDSPL KT-FT/10004 28 59 73  
 

 
FORECASTER...PICHA  
REQUESTED BY...DENNIS CARLSON  
TYPE OF REQUEST...PRESCRIBED  
.TAG 2312814.2/TOP  
.DELDT 05/18/23  
.FORMATTERVERSION 2.0.0  
.EMAIL DCARLSON@KSU.EDU  
 
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