Saturday, February24, 2018 L-36.com


Marine Weather and Tides
Hettick, 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 6:38AMSunset 5:49PM Saturday February 24, 2018 4:18 AM CST (10:18 UTC) Moonrise 12:13PMMoonset 1:59AM Illumination 67% Phase: Waxing Gibbous; Moon at 9 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 Hettick, IL
   Hourly   EDIT   Help
location: 39.38, -90.06     debug


Area Discussion for - St. Louis, MO
      (on/off)   Help   NOTE: mouseover dotted underlined text for definition
Fxus63 klsx 240949
afdlsx
area forecast discussion
national weather service saint louis mo
349 am cst Sat feb 24 2018

Short term (through late tonight)
issued at 348 am cst Sat feb 24 2018
ongoing heavy rain event is obviously the first concern. The
forecast looks to be working out pretty well with a large area of
rain forced by low level moisture convergence over a quasi-
stationary front stretching across southern missouri. Rainfall
amounts since midnight range from about 0.20-0.60 inch stretching in
a band from near vichy up into the st. Louis metro area with the
higher amounts to the southwest of the stl metro. This wave of rain
should end from southwest to northeast this morning from about 12z
to 16z as the 850mb flow veers and becomes more parallel to the
baroclinic zone. The axis of heaviest rain is within the
area of the flood watch so no changes to the watch are
anticipated at this time
meanwhile, up across northeast missouri, temperatures have fallen to
right around freezing, and freezing rain is currently being reported
in kirksville. Still think some light ice accumulation on elevated
surfaces is likely this morning before temperatures climb back above
32, so the winter weather advisory still looks good.

A strong shortwave will drop into the great plains today forcing
cyclogenesis over western arkansas or eastern oklahoma. The
resulting low will move northeast as the positively tilted wave lifts
into the midwest. Warm moist air in the warm sector of the system
will bring another wave of rain to our forecast area along with an
increased chance for thunderstorms. Highest QPF and chance for
flooding is south of the i-44 corridor in missouri late this
afternoon and this evening ahead of the cold front. Additionally,
the NAM shows MUCAPE values between 500-1000 j kg in southeast
missouri this evening. The GFS is not quite as aggressive with the
instability, but there will be more than enough shear to produce
severe thunderstorms if the higher instability can be realized.

Convective mode will be highly dependent on the amount of
instability which develops, but could range from a severe squall
line to low topped supercells. Regardless... The threat for severe
weather should be localized to southeast missouri and southern
illinois.

The cold front will move through quickly between 00z and 05z
tonight, bringing the wet weather to an end for the time being.

Increasing pressure gradient behind the front will likely produce
strong and gusty winds after FROPA with gusts to around 35 mph
likely... Particularly in northeast missouri into central illinois.

Carney

Long term (Sunday through Friday)
issued at 348 am cst Sat feb 24 2018
there is fairly good agreement among the models that the period from
Sunday through Monday night will be rather tranquil with above
normal and slowly moderating temperatures. Southwest flow aloft will
persist in the wake of the upper trof exiting the great lakes into
southeast canada while weak high pressure to the south of the cwa
dominates. A fast-moving low-amplitude short wave trof will traverse
the region on Sunday night. Moisture appears to be quite limited
with this wave and present indications are it will be just
accompanied by some mid clouds.

Temperatures will continue to moderate Monday as 1) heights rise
aloft associated with modest ridging occurring in response to
upstream amplification featuring a digging deepening west coast
upper low trof, and 2) southerly flow returns bringing weak waa. A
better boost in the warming appears on tap for Tuesday as flow aloft
become more southwesterly and WAA increases in response to
strengthening south-southwest low level flow.

From Tuesday night through the end of the week the GFS and ecmwf
begin to diverge in the details of the forecast. This is most
prominent beginning late Wednesday night when they depart
significantly with the handling of the ejecting west coast upper
trof. First on Tuesday night the ecwmf is rather stingy with the
amount and northern extent of a light precipitation event as a weak
impulse aloft traverse the area. The wetter GFS solution appears to
be a reflection of better low level moisture return. The GFS then
has the west coast trof ejecting across the plains and through the
ms valley Wednesday night into Thursday bringing strong large scale
ascent and accompanied by a a well developed surface low and
warm cold frontal systems. Alternatively the ecwmf has a cold
frontal passage due to a weak northern stream short wave with the
weakening west coast trof lagging back into the southern rockies and
southern plains. Overall the GFS has slightly better continuity.

While the GEFS shows a good deal of spread, it has more members than
not closer to the operational GFS solution, suggesting then another
wet period from Wednesday afternoon into Thursday morning.

Glass

Aviation (for the 06z tafs through 06z Saturday night)
issued at 1147 pm cst Fri feb 23 2018
precipitation has nearly overspread all TAF sites and will reach
uin imminently. Pcpn should be all rain except could mix with some
snow in uin initially. Ifr conditions have enveloped all TAF sites
except uin and will likely reach there by 09z. After a break in
the rain for most of the morning and early afternoon, round two of
the rain will move back in during Saturday afternoon and exit in
the early evening. Round two of the rain will be more convective,
and have added in some vcts to account for it for now. Light
ne surface winds will gradually veer E and strengthen by Saturday,
and further veer to SW and W during Saturday evening. Winds
notably will strengthen significantly with advent of SW to w
direction as the dry line cold front passes and will see gusts to
25-30kts.

Specifics for kstl: ifr conditions will prevail until passage of
dry line cold front Saturday evening. Steady rain will exit by
mid-morning with round two returning by late afternoon. Could see
some thunder nearby with the second round. After winds veer
gradually from NE to SE to SW by Saturday evening, look for
substantial strengthening with dry line cold front passage with
gusts to 30kts.

Tes

Preliminary point temps pops
Saint louis 55 34 57 34 100 80 0 5
quincy 48 29 50 29 80 80 0 0
columbia 53 30 54 30 80 80 0 5
jefferson city 55 31 56 31 90 80 0 0
salem 57 37 53 34 100 90 0 0
farmington 60 35 57 33 100 80 0 5

Lsx watches warnings advisories
Mo... Flood watch through this evening for crawford mo-franklin mo-
gasconade mo-iron mo-jefferson mo-madison mo-osage mo-
reynolds mo-saint charles mo-saint francois mo-saint louis
city mo-saint louis mo-sainte genevieve mo-warren mo-
washington mo.

Winter weather advisory until 9 am cst this morning for knox mo-
lewis mo.

Il... Flood watch through this evening for bond il-clinton il-fayette
il-madison il-marion il-monroe il-randolph il-saint clair
il-washington il.

Wfo lsx


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
Litchfield Municipal Airport, IL25 mi44 minE 65.00 miRain37°F36°F100%1019.6 hPa

Wind History from 3LF (wind in knots)
5
AM
6
AM
7
AM
8
AM
9
AM
10
AM
11
AM
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
Last 24hrSW7W8W10W8W7W9
G17
W9W7W8SW4W6NW6NW7N6N6N3N8N9N10NE8NE5NE8NE10E7
1 day agoNE4NE6NE5NE6NE8E10E8E7E6E8E9S6S5E3E3SE3SE7SE6SE14
G17
SE10SE11SE11S9S10
2 days agoNW7N7N5N5N6N6N6N6N6N7N5N6NE5N5N4N5NE6NE5NE5NE4NE6NE6N7N5

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 St. Louis, MO (5,6,7,8)
      (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.