Thursday, June29, 2017 L-36.com


Marine Weather and Tides
Jacksonville, IL

Version 3.4
What's New / NOTES
6/25/2017 - NOAA is having a major issue that impact the 7 day forecast load times. Many users are reporting problems. The issue has been reported.
5/23/2017 - Worked with NOAA again to speed up the 7 day forecast load times. Thanks to them for being responsive.
5/19/2016 - There were issues with the 3 day airport observation history. I switched to another data source. Let me know if you see any issues with the data feeds.

Sunrise 5:34AMSunset 8:34PM Thursday June 29, 2017 10:51 AM CDT (15:51 UTC) Moonrise 10:48AMMoonset 11:38PM Illumination 30% Phase: Waxing Crescent; Moon at 6 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
    EDIT      (on/off)   Help
7 Day Forecast for Marine Location Near Jacksonville, IL
   Hourly   EDIT   Help
location: 39.73, -90.23     debug


Area Discussion for - Central Illinois, IL
      (on/off)   Help   NOTE: mouseover dotted underlined text for definition
Fxus63 kilx 291546
afdilx
area forecast discussion
national weather service lincoln il
1046 am cdt Thu jun 29 2017

Update
Issued at 1045 am cdt Thu jun 29 2017
updated forecast to address convection chances north of i-70 this
afternoon and increased SW breezes with gusts of 20-30 mph. Went
a little cooler for highs over west central il where cloud cover
more extensive from MCS over northern mo, eastern ks and southern
ia. Most of CWA has been dry this morning with strong cap in place
per 12z kilx sounding. Showers and thunderstorms associated with
mcs have been west of il over northern mo eastern ks and far
southern ia. This convection was tracking ene. Latest high
resolution models increase chances of showers and thunderstorms
over areas along and north of i-72 during the afternoon while
southeast il remains dry. Capes peak at 1000-2000 j kg during the
afternoon while higher capes more unstable airmass remains west of
il today. Very warm highs in the mid to upper 80s with moist
dewpoints elevating to 65-70f.

Short term (today and tonight)
issued at 325 am cdt Thu jun 29 2017
developing low moving into the great lakes this morning... Moving
through northern wi. Same low has a cold front draped back into
the plains. 500 mb is mostly zonal across the midwest... Dealing
with a series of waves in the shorter term. This morning, remnant
showers from last nights more intense convection to the west... Is
moving through the region, bringing with it some pockets of high
wind. Immediate concerns are the evolution of the situation as the
hrrr is already running a little stronger than the current
situation. Hrrr is actually the moderate with the evening
convection... As a system develops to the west and moves across the
miss river valley later this afternoon. NAM in agreement for the
most part. However, the rap is considerably more dry longer into
the evening hours. Forecast is a compromise. Too much heat and
llvl rh mixed with several mesoscale boundaries available from
overnight to completely rule out afternoon evening thunderstorms.

Not inclined to go dry as long as the rap... But low confidence for
specific placement of higher probabilities. Either way, forecast
has ample mucapes this afternoon in the 2500-3000 j kg potential
in a narrow window ahead of advancing storms from the west. Low
level lapse rates lending themselves to development of
storms... Mid level less so. Large hail and damaging wind gusts
will be the main concern should any of the late afternoon evening
thunderstorms materialize.

Long term (Friday through Wednesday)
issued at 325 am cdt Thu jun 29 2017
the slow moving front across the region will keep the chances for
showers and thunderstorms in place through Friday... Before drying
out for Saturday. Weekend should be warm and dry until later
Sunday night as another front moves into the region bringing a
chance for precip to start the work week. Although there will
likely be breaks in the precip... The front slows in the models and
another developing wave moves in from the plains, resulting in a
prolonged period for showers and thunderstorms through midweek.

Details will start to emerge as time progresses for the first half
of next week. Temperatures likely going to remain in the 80s for
daytime highs... With the mild overnight lows only dipping into
the 60s through the end of the forecast.

Aviation (for the 12z tafs through 12z Friday morning)
issued at 603 am cdt Thu jun 29 2017
blustery morning with gusty south southwesterly winds continuing
as scattered showers move across central il. Some llws in pia, cmi and
bmi closer to the stronger winds still just off the sfc. Main
concern for the forecast is the timing of the afternoon evening
showers and thunderstorms. Will move in the vcts in the NW just
before 00z and progress across the state. Timing is definitely
low confidence, but should be rather widespread once it develops
and last through the overnight for the most part.=generally
south southwesterly flow throughout.

Ilx watches warnings advisories
None.

Update... 07
short term... Hjs
long term... Hjs
aviation... Hjs


Weather Reporting Stations
   EDIT       (on/off)   Help   NOTE: Click on distance to see the station location on a map

Airport Reports
    EDIT      (on/off)   Help   Click EDIT to display multiple airports
AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Jacksonville Municipal Airport, IL3 mi77 minSW 1010.00 miFair76°F61°F61%1011.5 hPa

Wind History from IJX (wind in knots)
12
PM
1
PM
2
PM
3
PM
4
PM
5
PM
6
PM
7
PM
8
PM
9
PM
10
PM
11
PM
12
AM
1
AM
2
AM
3
AM
4
AM
5
AM
6
AM
7
AM
8
AM
9
AM
10
AM
11
AM
Last 24hrS15
G22
S16
G24
S19
G24
S14
G26
S16
G27
S14
G23
S15
G22
S16
G20
S11
G17
S9
G16
S11
G18
S13
G17
S8SW9
G14
W7SW6SW8SW11
G14
S18
G26
SW14
G22
SW14
G21
W9SW9
G15
SW8
1 day agoNW3SE3CalmSE4S6SE5S4S6SE6SE4SE5SE5SE8SE6SE6SE9S9S8S9
G15
S10
G16
S10
G16
S12
G17
S15
G19
S10
G18
2 days agoNW12NW9W7SW6SW5SW8SW9SW8W7SW3SW3E5E3E3CalmCalmCalmCalmCalmCalmCalmE4CalmE5

Tide / Current Tables for
   EDIT   RT Ports Option   Weekend mode (on/off)   (on/off)   Help
Tide / Current Tables for
   EDIT      (on/off)   Help
Weather Map and Satellite Images
       (on/off)   Help
Weather Map
wmap_A
IR Satellite Image from GEOS
east_satellite

GOES Local Image of Midwest    EDIT
Geos

Wind Forecast for Central Illinois, IL (11,2,3,4)
      (on/off)   Help

Ground Weather Radar Station Central Illinois, IL
   (on/off)   Help
weather_mapweather_map weather_map

Ad by Google

Disclaimer:
The information on this web site has not been checked for accuracy. It is for entertainment purposes only and should be independently verified before using for any other reason. There are five sources. 1) Documents and manuals from a variety of sources. These have not been checked for accuracy and in many cases have not even been read by anyone associated with L-36.com. I have no idea of they are useful or accurate, I leave that to the reader. 2) Articles others have written and submitted. If you have questions on these, please contact the author. 3) Articles that represent my personal opinions. These are intended to promote thought and for entertainment. These are not intended to be fact, they are my opinions. 4) Small programs that generate result presented on a web page. Like any computer program, these may and in some cases do have errors. Almost all of these also make simplifying assumptions so they are not totally accurate even if there are no errors. Please verify all results. 5) Weather information is from numerious of sources and is presented automatically. It is not checked for accuracy either by anyone at L-36.com or by the source which is typically the US Government. See the NOAA web site for their disclaimer. Finally, tide and current data on this site is from 2007 and 2008 data bases, which may contain even older data. Changes in harbors due to building or dredging change tides and currents and for that reason many of the locations presented are no longer supported by newer data bases. For example, there is very little tidal current data in newer data bases so current data is likely wrong to some extent. This data is NOT FOR NAVIGATION. See the XTide disclaimer for details. In addition, tide and current are influenced by storms, river flow, and other factors beyond the ability of any predictive program.