Marine Weather and Tides
3/30/2021 -- ANZ330 has been split into ANZ331 and ANZ332. Click EDIT in Marine Forecast and select your new zone.
1/26/2021 -- The West Coast Satellite images havd been updated. They now use GEOS-17.
1/1/2021 -- The 7 day forecast are now working well. Thank you NOAA for your support.
|Sunrise 6:04AM||Sunset 8:41PM||Thursday July 29, 2021 11:21 AM CDT (16:21 UTC)||Moonrise 10:57PM||Moonset 11:05AM||Illumination 72%|
7 Day Forecast for Marine Location Near Albert City, IAHourly EDIT Help
Area Discussion for - Sioux Falls, SD  (on/off)  Help NOTE: mouseover dotted underlined text for definition
FXUS63 KFSD 291533 AFDFSD
AREA FORECAST DISCUSSION National Weather Service Sioux Falls SD 1033 AM CDT Thu Jul 29 2021
UPDATE. Issued at 1033 AM CDT Thu Jul 29 2021
Smoke has been outperforming the HRRR output by quite a bit early this morning, so have increased progression and persistence quite a bit. Impact of this will likely be felt on temperatures, and will soon be lowering expected highs by several degrees. Otherwise, a dry day with continued filtering of drier air on north to northeast flow.
SHORT TERM. (Today and Tonight) Issued at 311 AM CDT Thu Jul 29 2021
Aside from some isolated showers across NW Iowa, latest radar imagery reveals quiet conditions across the region, with current observations showing winds becoming northeasterly behind a departing cold front. Unlike the past few day, should see notably cooler temperatures prevail this afternoon, as highs only climb into the mid to upper 80s, with a few locations along the Missouri River possibly reaching the low 90s. In addition this, expect dewpoints to only rise into the low 50s to mid 60s, allowing us to take a much need break from the oppressive heat!
Much like the past few days, the HRRR smoke model continues to show lingering wildfire smoke aloft across a vast majority of our area. However, with northeasterly winds in place throughout the day, recent trends have suggested that a good portion of this smoke will likely begin to move towards the surface. Thus, in addition to skies having a hazy appearance, could also begin to see reduced visibilities across the area along with air quality issues.
Otherwise, look for rain chances to return to the forecast late Thursday night as the region becomes situated in the right entrance region of the upper level jet. While rain may certainly be possible in areas west of I-29 during this time, expect more widespread chances to occur Friday.
LONG TERM. (Friday through Wednesday) Issued at 311 AM CDT Thu Jul 29 2021
As mentioned above, look for rain chances to persist throughout the day Friday, with the best moisture axis forecast to fall along and south of I-90. At this time, think a good portion of our area stands a decent chance of seeing a quarter inch of rain, with areas south of I-90 possibly approaching an inch. It is worth noting, however, that PWATs ranging between 1.5 to 2 inches along the Missouri River, could certainly support more than an inch of rain fall during the heaviest downpours. Nonetheless, this will likely be our best chance for seeing meaningful rainfall throughout the upcoming week, which unfortunately means we'll likely see little relief to our ongoing drought conditions.
Otherwise, expect quiet conditions to prevail for the remainder of the extended period, as an amplified ridge builds to our west. Given that the region will be situated in NW flow aloft, look for seasonal temperatures to continue through early next week, with afternoon highs in the 80s, and overnight lows in the 50s to 60s. Should see the aforementioned ridge begin to flatten by mid-week, which may cause rain chances to return to the forecast as we head into the latter half of the week. At any rate, a lot could still change between now and then, so will continue to monitor the forecast over the coming days.
AVIATION. (For the 12Z TAFS through 12Z Friday morning) Issued at 624 AM CDT Thu Jul 29 2021
Continue to see consistent signal that vsby-reducing smoke will reach parts of our forecast area today, though am still a bit unsure when/where vsbys may be reduced below VFR level. It is worth noting however, that upstream observations in north central MN have fallen into the IFR-LIFR range at times this morning. Do not expect vsbys to reach these levels here as some dissipation should occur as the smoke field spreads farther south, though MVFR vsbys may certainly be possible. Will stick with 6SM FU at KFSD/KSUX for now.
Aside from any smoke issues, expect VFR conditions to prevail today, along with northeasterly winds. Should see cloud cover gradually increase heading into the overnight period ahead of our next system. While showers and storms are certainly possible towards the end of the TAF cycle, have excluded mention for the time being as confidence on exact timing remains low.
FSD WATCHES/WARNINGS/ADVISORIES. SD . NONE. MN . NONE. IA . NONE. NE . NONE.
UPDATE . Chapman SHORT TERM . SSC LONG TERM . SSC AVIATION . SSC
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|Storm Lake, IA||15 mi||26 min||NNE 11||9.00 mi||Mostly Cloudy||79°F||77°F||94%||1018.3 hPa|
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Wind History from SLB (wind in knots)
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