40.8680, -93.8050

1. Sun8 AM60°23%6 mph
2. 9 AM62°19%6 mph
3. 10 AM63°16%6 mph
4. 11 AM65°13%6 mph
5. 12 PM66°12%5 mph
6. 1 PM67°12%5 mph
7. 2 PM68°11%5 mph
8. 3 PM68°10%5 mph
9. 4 PM69°7%5 mph
10. 5 PM68°9%6 mph
11. 6 PM67°10%5 mph
12. 7 PM65°10%3 mph
13. 8 PM63°8%3 mph
14. 9 PM63°8%3 mph
15. 10 PM62°8%3 mph
16. 11 PM61°3%3 mph
17. Mon12 AM61°3%3 mph
18. 1 AM60°2%2 mph
19. 2 AM60°2%2 mph
20. 3 AM59°2%2 mph
21. 4 AM59°2%2 mph
22. 5 AM58°2%2 mph
23. 6 AM58°2%2 mph
24. 7 AM57°2%2 mph
25. 8 AM58°2%3 mph
26. 9 AM60°1%3 mph
27. 10 AM63°3 mph
28. 11 AM65°5 mph
29. 12 PM67°5 mph
30. 1 PM69°5 mph
31. 2 PM70°6 mph
32. 3 PM70°5 mph
33. 4 PM71°5 mph
34. 5 PM70°5 mph
35. 6 PM69°3 mph
36. 7 PM66°3 mph
37. 8 PM63°3 mph
38. 9 PM61°3 mph
39. 10 PM61°5 mph
40. 11 PM60°5 mph
41. Tue12 AM60°6 mph
42. 1 AM60°1%6 mph
43. 2 AM60°1%6 mph
44. 3 AM59°1%7 mph
45. 4 AM59°1%7 mph
46. 5 AM58°1%7 mph
47. 6 AM58°1%8 mph
48. 7 AM58°13%8 mph

Scroll sideways for more hours. Pick an hour for every number.

1. TodaySep 2769°60°Slight Chance Drizzle then Cloudy100%0.32 inwind 7 mph · gusts 13 mph
2. MonSep 2872°58°Mostly Sunny3%wind 6 mph · gusts 12 mph
3. TueSep 2970°62°Mostly Cloudy then Showers And Thunderstorms Likely91%0.49 inwind 10 mph · gusts 17 mph
4. WedSep 3070°62°Showers And Thunderstorms91%1.37 inwind 7 mph · gusts 15 mph
5. ThuOct 168°56°Showers And Thunderstorms Likely74%1.02 inwind 10 mph · gusts 17 mph
6. FriOct 265°55°Chance Showers And Thunderstorms41%0.72 inwind 9 mph · gusts 16 mph
7. SatOct 365°54°Slight Chance Rain Showers19%wind 8 mph · gusts 14 mph
8. SunOct 462°54°14%wind 10 mph · gusts 17 mph
9. MonOct 562°50°National Blend3%wind 6 mph · gusts 12 mph
10. TueOct 664°52°National Blend7%0.02 inwind 9 mph · gusts 15 mph
11. WedOct 7~66°55°Model mean0.01 in
12. ThuOct 8~58°42°Model mean
13. FriOct 9~59°41°Model mean0.05 in
14. SatOct 10~67°46°Model mean0.16 in
15. SunOct 11~71°55°Model mean0.18 in
16. MonOct 12~77°54°Model mean

• Feels like60°
• WindESE 6 mphgusts 12 mph
• Radar over this pointno reading
• Humidity96%
• Dew point59°
• Pressure—
• UV index—
• Air quality—
• Visibility7 mi
• Sunrise and sunsetSunrise · Sunset
• Moonrise7:19 PMMoonset 8:12 AM
• Moon phaseWaning gibbous99% lit

NOAA’s weighted blend of every model it runs, to eleven days, with the chances the grid above does not carry. Where the local office’s grid reaches, its figure sits beneath the blend’s; where it does not, the blend stands alone.

1. TodaySep 2770°57°NWS grid 69° / 60°rain 78%thunder 19%0.26 inwind 7 mph · gusts 13 mph
2. MonSep 2872°58°NWS grid 72° / 58°rain 3%wind 6 mph · gusts 12 mph
3. TueSep 2972°62°NWS grid 70° / 62°rain 91%thunder 21%0.55 inwind 10 mph · gusts 17 mph
4. WedSep 3071°62°NWS grid 70° / 62°rain 85%thunder 35%1.39 inwind 7 mph · gusts 15 mph
5. ThuOct 169°56°NWS grid 68° / 56°rain 72%thunder 26%1.00 inwind 10 mph · gusts 17 mph
6. FriOct 267°55°NWS grid 65° / 55°rain 38%thunder 17%0.65 inwind 9 mph · gusts 16 mph
7. SatOct 367°54°NWS grid 65° / 54°rain 18%thunder 14%0.01 inwind 7 mph · gusts 14 mph
8. SunOct 464°50°NWS grid 62° / 54°rain 13%wind 10 mph · gusts 17 mph
9. MonOct 562°50°Beyond the NWS gridrain 3%wind 6 mph · gusts 12 mph
10. TueOct 664°52°Beyond the NWS gridrain 7%0.02 inwind 9 mph · gusts 15 mph
11. WedOct 767°—Beyond the NWS gridrain 5%wind 7 mph · gusts 13 mph

Each line is one model’s own forecast at its own grid cell: three kilometers for HRRR, a quarter of a degree for the global models, which can sit a few hundred meters above or below the town. Where they agree the forecast is settled; where they part is where it is not.

NWS gridBlendHRRRGFSGEFS ± spreadECMWFECMWF AI

A ~ marks a high or low read from six-hourly steps, which miss the true extreme by a degree or two.

ECMWF ensemble meteogram

10 daysTemperature plume

No forecast has skill day by day past about two weeks, and this page does not print one. Where the models stop, the calendar takes over: the 1991 to 2020 normal for each date, the record high and low ever set on it, and where the Climate Prediction Center leans warm, cool, wet or dry over the coming weeks, the month and the season. A site that shows a high for a date three months out is showing you this normal with a wobble.

The forecast reaches Mon Oct 12, from the NWS grid, then the National Blend, then the mean of the global models. Beyond it the lines are the calendar.

Forecast high and lowNormal high and lowRecord high and lowCPC leans warmer than normalCPC near normal or equal chances

None of these is a measurement. Each is a rating of the forecast ahead, and of what is happening at the point right now, against what the activity or the ailment is known to mind, and each names the figure that decided it. An ailment or a pest is rated as a risk, low to extreme; an activity, a chore or a journey as a condition, poor to ideal.

Each rating says which span it is for: the rest of today’s daylight, tonight, or the next 24 hours.

Tonight has no dark, clear hour without a bright moon in this forecast. Rated poor.

Dark is the sun 18 degrees below the horizon; where it never gets that low, 12 degrees, marked nautical. Clear is sky cover of 20% or less. A bright moon is one above the horizon with a quarter or more of its disc lit. Transparency in the table is estimated from surface humidity (70% and 85% mark fair and poor) and visibility, since the forecast carries no haze or high cloud moisture. Seeing and transparency by hour, where shown, are Environment and Climate Change Canada’s astronomy forecast (regional model; seeing from cloud, wind shear, turbulence near the ground and the surface temperature trend; transparency from the moisture through the whole air column), under the Open Government Licence - Canada. Dew is the air within 2 °C of its dew point. Excellent is four or more clear moonless hours with good transparency; good is three; fair is one, or two clear hours.

Golden hour is the sun between 6 degrees above the horizon and 4 degrees below it; blue hour is the sun between 4 and 6 degrees below. These are the definitions timeanddate.com and PhotoPills use. Directions are degrees clockwise from true north, where the sun’s upper edge and the moon’s center cross a flat horizon; hills and buildings change both. None means the sun does not reach that height on the day; all day means it stays inside the band.

This hour: fly with caution (thunderstorms possible, low cloud limits height (107.51)). Next good stretch: Sun 11 AM to 6 PM, 7 hours.

Today: civil twilight for Part 107 6:38 AM to sunrise 7:08 AM, and sunset 7:04 PM to 7:34 PM. Anti-collision lighting is required in those minutes and at night.

Good Caution No-fly

Flight restrictions nearby

Reading the FAA’s temporary flight restrictions.

Flight restrictions on the map. TFRs are not the whole picture: controlled airspace around airports needs LAANC authorization. Check the FAA’s B4UFLY.

Wind at 400 ft is estimated from the 10 m forecast by the power law, with exponents for each Pasquill stability class (Irwin 1979, rural, as in EPA dispersion models; the class from wind, sun height and cloud, after Turner 1970); gusts keep the ground gust’s margin. Caution from three quarters of your limit; the default 24 mph is the wind resistance printed for common sub-250 g drones. 14 CFR 107.51: “The minimum flight visibility, as observed from the location of the control station must be no less than 3 statute miles” and at least “500 feet below the cloud”. 14 CFR 107.29: “No person may operate a small unmanned aircraft system during periods of civil twilight unless the small unmanned aircraft has lighted anti-collision lighting visible for at least 3 statute miles”; civil twilight is the 30 minutes before sunrise and after sunset, in Alaska the Air Almanac’s. Kp: SWPC’s scales say satellite navigation problems may occur at G3 (Kp 7) and navigation is “degraded for hours” at G4 (Kp 8); Kp 5 is the typical app warning. Typical limits, not rules: rain chance 30% caution and 60% no-fly, thunder 10% and 20%, below 0 °C caution and −10 °C no-fly, over 40 °C caution. Your drone’s manual and the airspace come first.

Hours fit for spraying, and the days dry enough for fieldwork and hay, read from this forecast’s wind, gusts, humidity, temperature and rain.

Spraying windows

• Mon 12 PM to 7 PM 7 hours, every hour within the rules

Good Marginal No

Field days

Spraying: sustained wind 3 to 10 mph, the range US extension services and most labels give; gusts no more than 15 mph (this page’s limit); delta T (air minus wet-bulb temperature) 2 to 8 °C preferred and 8 to 10 °C marginal, from GRDC guidance, with the wet bulb by Stull’s formula; no hour at a 30% chance of rain or 0.25 mm forecast during the rain-free time. Follow the product label, which overrides all of this. Field days: dry is no daytime hour at a 30% chance and under 1 mm all day, wet is 6 mm (0.25 in) or more; soil moisture is not in the forecast, so ground still wet from earlier rain is not accounted for. Hay drying marks a dry day with humidity down to 50% and a breeze of 5 mph or more.

The best-rated day this week is Sunday, rated best.

Periods in bold fall within an hour of sunrise or sunset. The weather’s side is the fishing index

Major periods are two hours centered on the moon’s passage overhead and underfoot; minor periods are one hour centered on moonrise and moonset: the conventional durations of John Alden Knight’s solunar tables (1936). The rating is this site’s: one point to start, two more within a day and a half of a new or full moon (one more within three and a half days), and one more when a period falls within an hour of sunrise or sunset. The theory has mixed support in fisheries research; the times are exact astronomy.

1. Today69° · 23% · ESE 6 mph

   A slight chance of drizzle before 11am. Cloudy, with a high near 69. East southeast wind around 6 mph. Chance of precipitation is 20%. New rainfall amounts less than a tenth of an inch possible.

2. Tonight57° · 10% · E 5 mph

   Mostly cloudy, with a low around 57. East wind around 5 mph.

3. Monday72° · 2% · ESE 2–6 mph

   Mostly sunny. High near 72, with temperatures falling to around 70 in the afternoon. East southeast wind 2 to 6 mph.

4. Monday Night58° · 1% · SE 3–7 mph

   Partly cloudy, with a low around 58. Southeast wind 3 to 7 mph.

5. Tuesday70° · 70% · SSE 10 mph

   Rain showers likely between 1pm and 4pm, then showers and thunderstorms likely. Mostly cloudy, with a high near 70. South southeast wind around 10 mph. Chance of precipitation is 70%. New rainfall amounts between a tenth and quarter of an inch possible.

6. Tuesday Night62° · 91% · S 8 mph

   Showers and thunderstorms. Cloudy, with a low around 62. Chance of precipitation is 90%. New rainfall amounts between three quarters and one inch possible.

7. Wednesday70° · 86% · S 7 mph

   Showers and thunderstorms. Cloudy, with a high near 70. Chance of precipitation is 90%.

8. Wednesday Night62° · 78% · SSE 6 mph

   Showers and thunderstorms. Cloudy, with a low around 62. Chance of precipitation is 80%.

9. Thursday68° · 74% · NE 7–10 mph

   Showers and thunderstorms likely. Cloudy, with a high near 68. Chance of precipitation is 70%.

10. Thursday Night56° · 53% · NNE 9 mph

    A chance of showers and thunderstorms before 7pm, then a chance of showers and thunderstorms. Mostly cloudy, with a low around 56. Chance of precipitation is 50%.

11. Friday65° · 40% · NE 6–9 mph

    A chance of showers and thunderstorms before 7am, then a chance of showers and thunderstorms. Partly sunny, with a high near 65. Chance of precipitation is 40%.

12. Friday Night55° · 36% · E 6 mph

    A chance of rain showers. Partly cloudy, with a low around 55. Chance of precipitation is 40%.

13. Saturday65° · 19% · ESE 5–8 mph

    A slight chance of rain showers. Partly sunny, with a high near 65.

14. Saturday Night54° · 19% · NNE 6 mph

    A slight chance of rain showers before 7pm. Mostly cloudy, with a low around 54.

Written by the forecaster on duty for their own colleagues and for anyone who wants to know why the forecast says what it says. It is not edited for the public, so it uses the office’s shorthand; it is also the most honest thing any weather service publishes.

FLUS43 KDMX 270752
HWODMX

Hazardous Weather Outlook
National Weather Service Des Moines IA
252 AM CDT Sun Sep 27 2026

IAZ004>007-015>017-023>028-033>039-044>050-057>062-070>075-
081>086-092>097-280800-
Emmet-Kossuth-Winnebago-Worth-Palo Alto-Hancock-Cerro Gordo-
Pocahontas-Humboldt-Wright-Franklin-Butler-Bremer-Sac-Calhoun-
Webster-Hamilton-Hardin-Grundy-Black Hawk-Crawford-Carroll-Greene-
Boone-Story-Marshall-Tama-Audubon-Guthrie-Dallas-Polk-Jasper-
Poweshiek-Cass-Adair-Madison-Warren-Marion-Mahaska-Adams-Union-
Clarke-Lucas-Monroe-Wapello-Taylor-Ringgold-Decatur-Wayne-
Appanoose-Davis-
252 AM CDT Sun Sep 27 2026

This Hazardous Weather Outlook is for portions of central Iowa.

.DAY ONE...Today and tonight

Fog possible in western Iowa late tonight, leading to visibility
reductions.

.DAYS TWO THROUGH SEVEN...Monday through Saturday

Chances for rain and thunderstorms are forecast from Tuesday 
through at least Thursday. Heavy rainfall is possible in portions
of the state, which raises concerns for flash flooding and renewed
river rises. Severe storms are not expected at this time.

.SPOTTER INFORMATION STATEMENT...

Spotter activation will not be needed.

&&

NWS Des Moines will discontinue the Hazardous Weather Outlook
product (HWO) on September 30th, 2026. Weather hazards and
outlooks will continue to be provided through the standard
forecast channels, including weather briefing packets, forecast
discussions, weather story graphics, the experimental graphical
hazardous weather outlook, and updated hazard messaging. All
local products and visual tools are accessible directly at
weather.gov/desmoines.

$$

The national centers each publish a judgment the local grid does not carry. Read here at this exact coordinate.

The last spring freeze (32°F) usually comes around April 29 and the first fall freeze around October 9: a growing season of about 162 days.

One fall in ten brings a freeze by September 24; one spring in ten still has one after May 11.

Climate of 40.87, -93.81: normals, records and every month

The forecast office edits about sixty fields for every cell of its grid. The common ones are above; these are the rest, as the daily extreme, for anyone who needs the mixing height, the fire danger or the swell.

Each forecast day against the same calendar date at the nearest long-record station: the 1991 to 2020 normal, and the record high and low with the year they were set.