Spot Forecast
Issued by NWS La Crosse, WI
Issued by NWS La Crosse, WI
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049 FNUS73 KARX 301058 FWSARX Spot Forecast for Ballard...US FISH AND WILDLIFE SERVICE National Weather Service La Crosse WI 558 AM CDT Tue Apr 30 2024 Forecast is based on ignition time of 1000 CDT on April 30. If conditions become unrepresentative...contact the National Weather Service. Please contact our office at (608) 784-8292 if you have questions or concerns with this forecast. .DISCUSSION...It will be mostly sunny today. It will be in the mid-50s at ignition time and then warm into the mid-70s this afternoon. Relative humidities will be in the 60s at ignition and then drop into the upper 40s for this afternoon. Winds will be light and variable this morning and then become south at 5 to 10 mph this afternoon. There will occasional gusts up to 15 mph this afternoon. Due to the light winds, smoke dispersion will be initially poor at ignition time. As diurnal mixing occurs later this morning and afternoon, smoke dispersion will become excellent. Showers and storms will move through the region tonight. Some of these storms could be strong to severe between 8 PM and 9 PM. The main threats will be hail around 1-inch in diameter, wind gusts up to 60 to 65 mph, and a tornado or two. It will dry on Wednesday. High temperatures will be in the upper 60s. Afternoon humidities will fall into the mid-30s. Winds will be west at 10 to 20 mph in the morning and northwest in the afternoon. .TODAY... Sky/weather.........Mostly sunny (25-35 percent). CWR.................0 percent. Temperature.........57 at ignition...Max 74. RH..................62 percent at ignition...Min 48 percent. Wind (20 ft)........Winds west at 2 mph at ignition...otherwise Light winds becoming south 5 to 11 mph in the afternoon. Mixing height.......1700 ft AGL at ignition...otherwise 3200 ft AGL increasing to 4300 ft AGL late in the afternoon. Transport winds.....Southwest 6 to 7 mph shifting to the south 10 to 17 mph early in the afternoon, then increasing to around 20 mph late in the afternoon. Smoke dispersal.....Poor /8600 knot-ft/ at ignition. Max...excellent /72900 knot-ft/. Haines Index........4 or low potential for large plume dominated fire growth at ignition...max 4. TIME (CDT) 10A 11A 12P 1PM 2PM 3PM 4PM 5PM Sky (%).........8 8 9 10 20 30 40 50 Weather cov..... Weather type.... Tstm cov........ CWR.............0 0 0 0 0 0 0 10 Temp............57 61 63 66 69 71 73 74 RH..............62 56 54 52 51 49 48 48 20 FT wind dir..W S S S S S S S 20 FT wind spd..2 3 5 6 8 9 9 11 20 FT wind gust.5 7 9 11 13 15 16 16 Mix hgt (kft)...1.7 2.1 2.5 2.7 3.2 3.7 4.3 4.0 Transp wind dir.W SW S S S S S S Transp wind spd.6 7 10 13 15 17 20 20 Haines index....4 4 4 4 4 4 4 4 SDspl kt-ft/10009 13 22 30 41 56 73 67 .TONIGHT... Sky/weather.........Mostly cloudy (75-85 percent) then becoming partly cloudy (20-30 percent). Showers and thunderstorms in the evening. Chance of showers and thunderstorms overnight. CWR.................10 percent increasing to 90 percent in the evening and overnight, then decreasing to 10 percent overnight. Temperature.........Min 50. RH..................Max 89 percent. Wind (20 ft)........Southeast winds 10 to 12 mph with gusts to around 21 mph shifting to the west 9 to 11 mph with gusts to around 21 mph overnight. Gusty and erratic winds expected near thunderstorms early in the evening. Gusty and erratic winds expected near thunderstorms late in the evening. Gusty and erratic winds expected near thunderstorms overnight. Mixing height.......500 ft AGL. Transport winds.....South 16 to 22 mph shifting to the west 14 to 21 mph overnight. Smoke dispersal.....Fair (18100 knot-ft) early in the evening decreasing to poor (6400 knot-ft) late in the night. Haines Index........4 or low potential for large plume dominated fire growth. TIME (CDT) 6 PM 8 PM 10 PM MIDNGT 2 AM 4 AM Sky (%).........59 77 96 78 48 6 Weather cov..... LIKELY DEFNTE CHANCE Weather type....NONE RNSHWR RNSHWR RNSHWR NONE NONE Tstm cov........ LIKELY CHANCE CHANCE CWR.............10 60 90 40 10 0 Temp............72 70 65 62 59 53 RH..............51 57 70 81 87 89 20 ft wind......SE 10 SE 11 S 12 SW 13 W 11 W 9 20 ft wind gust.16 18 21 23 21 18 Mix hgt (ft)....1300 600 700 700 800 600 Transport wind..S 16 S 18 S 21 SW 21 W 18 W 15 Haines index....4 4 4 4 4 4 SDspl kt-ft/100018 9 12 12 13 8 .WEDNESDAY... Sky/weather.........Mostly sunny (25-35 percent). CWR.................10 percent. Temperature.........Max 69. RH..................Min 36 percent. Wind (20 ft)........West winds 8 to 12 mph shifting to the northwest 8 to 10 mph late in the afternoon. Mixing height.......1600 ft AGL increasing to 3900 ft AGL in the late morning and afternoon. Transport winds.....West 13 to 20 mph shifting to the north 10 to 13 mph late in the afternoon. Smoke dispersal.....Poor (4900 knot-ft) early in the morning increasing to excellent (70500 knot-ft) in the afternoon. Haines Index........4 to 5 or low to moderate potential for large plume dominated fire growth. TIME (CDT) 6 AM 8 AM 10 AM NOON 2 PM 4 PM Sky (%).........6 15 14 35 48 56 Weather cov..... Weather type....NONE NONE NONE NONE NONE NONE Tstm cov........ CWR.............0 0 0 0 10 10 Temp............51 52 59 64 67 68 RH..............83 80 55 41 36 36 20 ft wind......W 8 W 9 W 12 NW 12 NW 10 NW 9 20 ft wind gust.14 13 18 19 16 13 Mix hgt (ft)....400 1000 2800 3700 3800 3500 Transport wind..W 13 W 17 W 23 W 22 NW 18 NW 13 Haines index....4 5 5 5 5 5 SDspl kt-ft/10005 15 55 70 61 39 $$ Forecaster...JSB Requested by...Erik Acker Type of request...PRESCRIBED .TAG 2412757.0/ARX .DELDT 04/30/24 .FormatterVersion 2.0.0 .EMAIL erik_acker@fws.gov