Weather
Ortonville, Minnesota
Current Conditions
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Almanac
Average High: 83°
Average Low: 58°
Record high/year: 105° (1940)
Record low/year: 45° (1914)
Sunrise: 5:55 AM
Sunset: 9:07 PM
Detailed History
Sun and Moon
Sunrise: 05:55 AM (CDT)
Moon Rise: 09:36 PM (CDT)
Sunset: 09:07 PM (CDT)
Moon Set: 05:59 AM (CDT)
Moon Phase
Next 12 Hours
Forecast data from the National Digital Forecast Database
5-Day Forecast
Forecast for Big Stone
Rest of Today
Mostly sunny. Highs in the lower 80s. Northeast winds around 10 mph.
Tonight
Mostly cloudy. Lows in the upper 50s. East winds around 10 mph in the evening becoming light.
Saturday
Partly sunny with a 20 percent chance of showers and thunderstorms. Highs in the upper 70s. Southeast winds around 10 mph.
Saturday Night
Mostly cloudy. Lows in the lower 60s. Southeast winds around 10 mph.
Sunday
Partly sunny. A 30 percent chance of showers and thunderstorms in the afternoon. Highs in the mid 80s. Southeast winds around 10 mph.
Sunday Night
Mostly cloudy. A 20 percent chance of showers and thunderstorms in the evening. Lows in the lower 60s.
Monday through Tuesday
Partly cloudy. Highs in the mid 80s. Lows in the lower 60s.
Tuesday Night
Partly cloudy with a 20 percent chance of showers and thunderstorms. Lows in the mid 60s.
Wednesday
Partly sunny with a 20 percent chance of showers and thunderstorms. Highs in the mid 80s.
Wednesday Night
Mostly cloudy with a 30 percent chance of showers and thunderstorms. Lows in the mid 60s.
Thursday
Partly sunny. Highs in the mid 80s.
Personal Weather Stations
Personal Weather Stations [Add your weather station!]
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Location: RAWS BIG STONE NWR MN US, Odessa, MN Updated: 1:51 PM CDT |
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| Temperature: 78 °F | Dew Point: 60 °F | Humidity: 54% | Wind: East at 6 mph | Pressure: - | Hourly Precipitation: 0.00 in | Heat Index: 79 °F | Historical Graphs |
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Location: NonFedAWOS MILLBANK SD US SUPERAWOS, Milbank, SD Updated: 1:55 PM CDT |
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| Temperature: 77 °F | Dew Point: 61 °F | Humidity: 57% | Wind: Calm | Pressure: 30.03 in | Hourly Precipitation: 0.00 in | Heat Index: 79 °F | Historical Graphs |
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Location: IEM Milbank KELO-TV, Milbank, SD Updated: 1:50 PM CDT |
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| Temperature: 74 °F | Dew Point: 56 °F | Humidity: 53% | Wind: ENE at 5 mph | Pressure: 30.00 in | Hourly Precipitation: 0.00 in | Heat Index: 77 °F | Historical Graphs |
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Location: stevens twsp, Chokio, MN Updated: 2:10 PM CDT |
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| Temperature: 78.3 °F | Dew Point: 60 °F | Humidity: 53% | Wind: NNE at 3.0 mph | Pressure: 29.95 in | Hourly Precipitation: 0.00 in | Heat Index: 80 °F | Historical Graphs |
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Location: MNDOT Graceville MN-28 Mile Post 19, Graceville, MN Updated: 1:56 PM CDT |
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| Temperature: 79 °F | Dew Point: 57 °F | Humidity: 46% | Wind: NE at 7 mph | Pressure: - | Hourly Precipitation: 0.00 in | Heat Index: 80 °F | Historical Graphs |
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MSN Maps of: |
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| Temperature | Dew Point | Humidity | Wind | Pressure | Hourly Precipitation | - | |
NWS Forecaster Discussion
533 fxus63 kabr 181511 afdabr Area forecast discussion National Weather Service Aberdeen South Dakota 1011 am CDT Friday Jul 18 2008 Update... all bets are off with forecast package today as widespread convective debris moves from western counties to the east. This will make for a very difficult maximum temperature forecast adjustment with going highs in the 80s. Across eastern counties...mid/high convective debris means Reliance on any breaks in late am/PM hours. Any sun hereafter will cause rapid jump in temperature...so will hold off on any changes to highs in eastern County Warning Area. For western counties...same issue as well defined clearing line lacking with the current convective activity...supported by general upslope flow extending into western South Dakota from surface high in southeast ND. Next issue is pop chances. Have updated for current convection...and will keep afternoon forecast for slight chance in west...however latest NAM overdoing drying as Morning Sun evaporated dew/fog and eastern County Warning Area dew points have jump 3 to 5 degrees. Will be tough mixing this out with cloud cover...and although this has little bearing on the near term minus additional mugginess...the main issue is that forecast for tonights nocturnal convective activity hinged on larger dew point depressions in the NE County Warning Area. Therefore will likely increase pop coverage overnight with expected complex. && Previous discussion... short term...today through 00z Monday main forecast challenge this morning deals with precipitation chances through the period. Msas is currently showing a weak surface convergence boundary draped along the northern tier counties...with some isolated -tsra developing along this feature. This boundary is very subtle...but is defined by dewpoints in th 50s north of boundary...and dewpoints in the 60s south of this feature. Models are having difficult time defining such a subtle feature. Models do show next in series of waves moving into northwestern South Dakota in quick zonal flow. Currently convection is firing across southeastern Montana...and with boundary in place across northern counties...have included some small probability of precipitation for the northwest/western County Warning Area this morning and afternoon. With respect to precipitation chances for later today/tonight...big unknown in this equation is role dry low level air will play. The GFS shows surface/925mb trajectories off of dry high dropping into Minnesota during the day today...with GFS/NAM also showing relative humidity minima at 850 mb across western Minnesota/far eastern South Dakota through 12z Saturday. RUC shows 7h Theta-E downglide taking place during the day acros the east in conjunction with high settling in...so dry forecast across the east looks to be a good bet. GFS is showing that warm air advection forcing...seen in the 850 mb-7h q-vector fields...wanes fairly quickly during the morning hours..with a reset taking place by 00z Saturday as next upper wave approaches. Anticipate that mesoscale convective system will develop later tonight west of South Dakota...then advect east late tonight into Saturday morning. Subsidence/downglide behind system should lead to rapid drying/ending of precipitation from west to east during the day Saturday as complex moves into Minnesota. Feeding into system tonight will be 850 mb winds from 25 to 35 kts...so if complex can overcome dry air intrusion down low...should be able to survive the night as it moves east. Another dry period should set up Saturday night into Sunday morning for most of the County Warning Area as high pressure remains in control. By Sunday afternoon...the GFS develops another surface low in central Nebraska with inverted trough nosing NE through eastern County Warning Area. 7h temperatures are close to capping temperatures across southwestern County Warning Area. The northestern County Warning Area though has 7h temperatures below 10 degrees celcius...so thunderstorms and rain should be easier to develop there than in the SW. Temperature wise...weak cold air advection across the east today should keep temperatures below normal for this time of year...with warming temperatures expected across the west. A warming trend is then anticipated through Sunday with slowly rebounding heights/thickness values. Long term...Sunday night through Thursday the timing of a short wave at the beginning of the period is the main challenge in the extended. The period opens with an upper level ridge in the west and trough in the east. This leave the northern plains under northwest flow aloft. The GFS shows a closed 700 mb low over northern Wisconsin...with a weak middle level trough back across the Dakotas. Boundary layer dew points are shown to be in the upper 60s to lower 70s over much of South Dakota. Low level jet of 35 kts points to western Iowa...which would leave at least some quantitative precipitation forecast in the eastern County Warning Area. This wave moves into the Midwest with the upper level ridge rebounding in the western Dakotas. The region dries out behind this wave with boundary layer dew points struggling into the lower 50s...plus a close 700 mb high is shown to rule the northern plains. High pressure slides east...allowing for moisture to return up the plains states. Not real confident with precipitation chances for Tuesday evening with the GFS showing a delay in moisture return. The European model (ecmwf) however is more progressive in the extended...and is trying to bring a strong surface low into the northern High Plains with plenty of available moisture. Made only minor changes to the weather/pop grids with this big of disagreement among models. && Aviation... broken-overcast conditions will be found over all but the far eastern County Warning Area today. The lowest clouds...between 1000-2000 feet...will be found across the southwestern County Warning Area...affecting kpir. The rest of the area will see VFR ceilings. The cloud bases in the southwest are expected to lift and become VFR by 18z. Visibilities will be unrestricted all day. A weak upper level disturbance will bring a chance of thunderstorm activity this evening...reaching kpir and kmbg after 0z. Thunderstorm chances spread eastward during the overnight hours. && Abr watches/warnings/advisories... South Dakota...none. Minnesota...none. && $$ Update...Connelly short term...Hintz long term...South Dakota aviation...Parkin Weather.Gov/Aberdeen