Marine Weather and Tides
12/16/2019 NOAA is having trouble with requests that include wind gusts. I am posting graphs without wind gusts until it gets fixed.
10/9/2019 Updated the Marine Zones.
9/4/2019 Fixed the weather maps due to NOAA moving them.
7/25/2019 New feature in the Airports section gives a link to 5 minute updates for data reports.
|Sunrise 5:39AM||Sunset 8:45PM||Monday June 1, 2020 9:37 PM CDT (02:37 UTC)||Moonrise 2:56PM||Moonset 2:21AM||Illumination 84%|
7 Day Forecast for Marine Location Near Nevada, IAHourly EDIT Help
Area Discussion for - Des Moines, IA  (on/off)  Help NOTE: mouseover dotted underlined text for definition
FXUS63 KDMX 012331 AFDDMX
Area Forecast Discussion National Weather Service Des Moines IA 631 PM CDT Mon Jun 1 2020
. Updated Aviation Discussion .
DISCUSSION. /Tonight through Monday/ Issued at 205 PM CDT Mon Jun 1 2020
A rapid transition from a prolonged stretch of spring-like weather right into summer is currently occurring across the region, with temperatures climbing through the 80s and dewpoints surging into the 60s within a field of gusty south southwest surface winds. A large thermal ridge building across the central U.S. will keep the warm air/moisture advection pump flowing overnight and Tuesday, albeit with more moderate surface winds during the day Tuesday. With lows only around the upper 60s overnight we should have no trouble climbing into the lower 90s across most or all of the forecast area on Tuesday afternoon, and there have been no significant changes to the heat forecast or messaging on this shift. Heat index values will remain below advisory criteria so no long-fuse headline is anticipated, but given the relative coolness of the season so far the comparative heat and humidity will be a shock to the system for sensitive populations.
By late in the day Tuesday a shortwave impulse moving over South Dakota will flatten the thermal ridge and push a weak surface cool front toward Siouxland and southern Minnesota. This will provide a classic set-up for summer regime thunderstorm initiation near the boundary, northwest of our area, with an enhanced risk of severe weather appropriately advertised by SPC. By the time the resulting line of storms and attendant boundary enter northern Iowa, around or just after sunset Tuesday, instability will be slowly diminishing but still more than sufficient for strong updrafts. However, with the mid-level shortwave moving north of Iowa and already past and crossing Wisconsin by that time, shear/flow fields and large-scale forcing will be notably modest to weak, resulting in a steadily diminishing severe weather threat, mostly in the form of strong winds, as the storms bleed southeastward into Iowa Tuesday night. It is difficult to tell whether they will even reach central Iowa as the parent system will be so far gone by the time the boundary would sag that far south, and the threat would likely rely on a nebulous nocturnal low-level jet. In any event, the boundary should make it down to northern Missouri before stalling around Wednesday morning.
On Wednesday light northeast-ish winds behind the boundary should moderate temperatures somewhat, and most or all convection associated with the decayed boundary should remain to our south and west over Missouri/Kansas/Nebraska, though it is possible our southern counties could be affected at times. There are indications that the boundary may retreat northward on Wednesday night, with a second mid-level shortwave then essentially repeating the Tuesday scenario on Thursday afternoon/evening. There is a lot of uncertainty in that solution right now, but it does bear watching as it could lead to a severe weather threat in Iowa late Thursday. Once said impulse, and any associated storms, pass through by Thursday night we will enter another more moderate temperature and relatively quiet regime from Friday into Saturday, with some lingering POPs at the end of the week but likely nothing organized.
From Saturday into early next week it appears another, possibly stronger deep-layer ridge will build over the central U.S. and likely lead to another spell of notably hotter weather over Iowa, along with additional thunderstorm chances at times. Any convective details are inscrutable at this range, but the synoptic pattern certainly favors heat and humidity and likely heightened message of the associated hazards once again. It appears that summer will be with us for some time, now that it has finally arrived.
AVIATION. /For the 00Z TAFS through 00Z Tuesday evening/ Issued at 629 PM CDT Mon Jun 1 2020
VFR conditions prevail through the current TAF period. Gusty south winds relax around dusk this evening. LLWS develops tonight with 35 to 40 kts of shear just 2000 feet off the surface. LLWS dissipates tomorrow morning.
DMX WATCHES/WARNINGS/ADVISORIES. NONE.
DISCUSSION . Lee AVIATION . Martin
Weather Reporting StationsEDIT (on/off)  Help NOTE: Click on distance to see the station location on a map
Airport ReportsEDIT (on/off)  Help Click EDIT to display multiple airports. Follow links for more data.
|Ames, Ames Municipal Airport, IA||9 mi||45 min||no data||10.00 mi||Fair||78°F||64°F||62%||1011.1 hPa|
|Boone Municipal, IA||21 mi||43 min||SW 13||10.00 mi||Fair||82°F||60°F||48%||1011.8 hPa|
|Ankeny Regional Airport, IA||24 mi||43 min||SW 9 G 15||10.00 mi||Fair||81°F||62°F||54%||1013.2 hPa|
Link to 5 minute data for KAMW
Wind History from AMW (wind in knots)
|1 day ago||SE||Calm||W||Calm||Calm||Calm||SE||E||E||SE||SE||SE||SE||S||SE||S||S||S|
|2 days ago||NW||NW||Calm||N||N||N||Calm||Calm||NE|
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GEOS Local Image of EDIT
NOTE: East coast views moved to GEOS-16. They are experimental and not well supported by NOAA so they may not be correct so be warned. This change required redoing a large amount of the GOES code. If the image you are expecting is not showing, please let me know. You may need to use the EDIT function to update your location.
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Other links: Northern Pacific Contential US Full GOES-East
Wind Forecast for Des Moines, IA (22,6,7,8)(on/off)  Help
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