Thursday, April22, 2021
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Marine Weather and Tides
Apple River, IL

Version 3.4
NOTICE
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 6:04AMSunset 7:49PM Thursday April 22, 2021 9:33 AM CDT (14:33 UTC) Moonrise 1:30PMMoonset 3:09AM Illumination 81% Phase: Waxing Gibbous; Moon at 11 days in cycle
NOTE: Some of the data on this page has not been verified and should be used with that in mind. It may and occasionally will, be wrong. The tide reports are by xtide and are NOT FOR NAVIGATION.
Marine Forecasts
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7 Day Forecast for Marine Location Near Apple River, IL
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location: 42.44, -90.06     debug


Area Discussion for - Quad Cities, IA/IL
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FXUS63 KDVN 221131 AFDDVN

Area Forecast Discussion National Weather Service Quad Cities IA IL 631 AM CDT Thu Apr 22 2021

. AVIATION UPDATE .

SYNOPSIS. Issued at 217 AM CDT Thu Apr 22 2021

Satellite shows bkn to OVC clouds associated with a shortwave passing to our north early this morning north of a Vinton to maquoketa to Sterling Rock Falls Illinois line. This was helping to keep temperatures warmer across the area this morning along with westerly winds of 5 to 10 MPH. Temperatures at 3 AM ranged from 28 degrees at Davenport and Clinton to 34 degrees at Fort Madison. Dewpoints are in the upper teens and lower 20s.

SHORT TERM. (Today and Tonight) ISSUED AT 217 AM CDT Thu Apr 22 2021

The main forecast concerns were chances of precipitation Thursday night. The Canadian and the ECWMF are much drier solutions than the GFS and NAM.

Clouds over the northern part of our forecast area this morning or roughly north and east of a Vinton to Sterling Rock Falls line are forecast to shift to the east of the area by mid morning. Shortwave ridging at the surface and aloft will move across the forecast area late this morning into this evening. As the surface high passes to our south this afternoon, winds will veer to the south and draw moisture northward into the area this evening. Today will be noticeably warmer with highs in the mid to upper 50s.

The GFS and NAM show increasing relative humidities and condensation pressure deficits moving into parts of southeast Iowa and northeast Missouri by 06 UTC and spreading northeastward through 12 UTC Friday. This is associated with increasing isentropic lift, and warm advection on the nose of a 15 to 20 knot 850 mb low level jet veering into the area overnight. The Canadian and ECMWF show less moisture to work with and thus less precipitation. However, both models show a similar low level jet to the GFS and NAM. The best chances of rain showers will be closer to 12 UTC Friday, generally west of the Mississippi River.

LONG TERM. (Friday through Wednesday) ISSUED AT 217 AM CDT Thu Apr 22 2021

Friday and Saturday

Scattered light rain showers are possible Friday morning into the early afternoon as a modest southwesterly 700mb jet crosses over Iowa and Illinois. The showers will diminish and push east of the area during the mid/late afternoon as a new area of forcing begins to develop over the southern forecast area.

Models have trended further south on the rain potential Friday night into Saturday morning with the best chances for appreciable rainfall along and south of highway 34. Divergence in a right jet entrance region and 600-700mb fgen response look to focus the steadier rain in this aforementioned southern section of the CWA - where 0.25 to 0.50 inch amounts are still possible. At this point, a tenth or less is forecast north of I-80.

Extensive cloud cover and periods of light rain or showers will hold highs in the low/mid 50s on Friday. As the low tracks well to the south and east of our area on Saturday, cloud cover should decrease during the afternoon, allowing temps to rebound into the upper 50s and lower 60s. Although, NW winds gusting 20-25 mph may add a little chill to the air.

High pressure building in from the north and decoupling winds Saturday night could lead to areas of frost along/north of I-80, where forecast lows are in the low to mid 30s.

Sunday

A surface high over the Western Great Lakes will result in a somewhat cool ESE flow developing through the day. Forecast 850mb temps on this pattern transition day are fairly cold, ranging from +4 C across the south to around 0 C in the north. The NBM has trended a few degrees cooler for highs and has low 50s north to lower 60s south.

There are signals for isolated showers, associated with an elevated warm air advection wing, to affect the northern forecast area from the late morning into the afternoon. Confidence is low on this scenario, so did not mention rain in the forecast yet.

Monday On

A deep upper trough will dig into the Western U.S. early next week, leading to lee-side cyclogenesis in the Plains and a big warm up across the Midwest. Forecast highs are in the 70s for both Monday and Tuesday. Some locations could reach near 80 F, especially on Tuesday.

As the western trough reaches the Midwest, an influx of Gulf moisture and instability will lead to chances for showers and thunderstorms - mainly from Tuesday night through Wednesday night. Rounds of moderate to heavy rain are possible as deep ascent interacts with a moisture rich air mass (1.25-1.5" PWATs). Uttech

AVIATION. (For the 12Z TAFS through 12Z Friday Morning) ISSUED AT 628 AM CDT Thu Apr 22 2021

VFR will prevail today with WSW winds increasing to 10-20 kts. A push of moisture from the southwest will spread MVFR ceilings and light rain toward CID, BRL, and MLI late tonight into early Friday morning. Models are aggressive on IFR ceilings setting in after 12Z/Friday which is slightly beyond this TAF cycle.

DVN WATCHES/WARNINGS/ADVISORIES. IA . Freeze Warning until 9 AM CDT this morning for Benton-Buchanan- Cedar-Clinton-Delaware-Des Moines-Dubuque-Henry IA-Iowa- Jackson-Jefferson-Johnson-Jones-Keokuk-Lee-Linn-Louisa- Muscatine-Scott-Van Buren-Washington.

IL . Freeze Warning until 9 AM CDT this morning for Bureau-Carroll- Hancock-Henderson-Henry IL-Jo Daviess-McDonough-Mercer- Putnam-Rock Island-Stephenson-Warren-Whiteside.

MO . Freeze Warning until 9 AM CDT this morning for Clark-Scotland.



SYNOPSIS . Cousins SHORT TERM . Cousins LONG TERM . Uttech AVIATION . Uttech


Weather Reporting Stations
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Platteville Municipal Airport, WI27 mi38 minW 810.00 miMostly Cloudy41°F27°F57%1019.3 hPa

Link to 5 minute data for KPVB

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NOTE: This section has been updated as of 1/26/2021. If the image you are expecting is not showing, please let me know. You may use the EDIT function to update your location.
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