Marine Weather and Tides
10/6/2018 Colors of tide XTide graphs changed to emphasize that they were upgraded. See next note. Comments welcome.
10/4/2018 I have fixed XTide and updated the harmonic files. There were some name changes so you might have to click EDIT to find the new station name.
|Sunrise 5:41AM||Sunset 8:12PM||Tuesday May 21, 2019 1:27 AM CDT (06:27 UTC)||Moonrise 10:06PM||Moonset 6:59AM||Illumination 95%|
7 Day Forecast for Marine Location Near Holiday Shores, ILHourly EDIT Help
Area Discussion for - St. Louis, MO  (on/off)  Help NOTE: mouseover dotted underlined text for definition
|Fxus63 klsx 210555|
area forecast discussion... Updated aviation
national weather service saint louis mo
1255 am cdt Tue may 21 2019
Issued at 945 pm cdt Mon may 20 2019
grids have been updated to better reflect the spatial extent
(central into NE mo) and character (shra with embedded tsra) of
precipitation across the western part of the lsx cwa.
Short term (through late Tuesday night)
issued at 326 pm cdt Mon may 20 2019
elevated convection will spread eastward into our forecast area
later this evening and overnight as a strong southerly low level jet
brings relatively strong low level warm air advection, theta-e
advection and moisture convergence particularly to northeast and
central mo into west central il where the highest QPF is expected.
Some locally heavy rainfall is possible in this area. The surface
wind will actually strengthen late tonight as the surface
pressure gradient tightens between the surface ridge over the
great lakes region and the developing surface low over the ok
panhandle region. Will get a break in the convection late Tuesday
morning and early afternoon, then a line of severe convection will
move rapidly eastward through our forecast area late Tuesday
afternoon and evening as a warm front lifts northward through our
region with increasing surface dew points and instability along
and south of the front while a surface trough... Dry line
approaches from the west. There will be strong low-mid level wind
shear due to an 80 kt mid level wind MAX east-southeast of the
negatively tilted upper level trough low along with at least
modest instability. The primary threats will be damaging winds and
tornadoes. Even outside of the storms the winds will be very
strong and gusty Tuesday afternoon and early evening. Convection
should weaken late Tuesday night, but will continue across
southeast mo and southwest il.
Long term (Wednesday through next Monday)
issued at 326 pm cdt Mon may 20 2019
warmer temperatures are forecast for Wednesday as upper level
heights slowly rise coupled with south southwest surface low
level winds. Another round of convection is likely Wednesday night
into Thursday morning along a weak cold front which will drop|
southeastward into our forecast area. It looks like the highest
chance for showers storms will be across northeast mo and west
central il. The warming trend will continue as an upper level
ridge builds into mo and il from the southeastern us. Northeast mo
and west central il will be the most likely area for convection
Friday and into the weekend as this upper level ridge flattens
some with weak synoptic fronts or thunderstorm outflow boundaries
sagging southward into this area along with weak "ridge runner"
shortwaves over-topping the upper level ridge in this area.
Aviation (for the 06z tafs through 06z Tuesday night)
issued at 1211 am cdt Tue may 21 2019
specifics for kcou, kuin: a broad area of rain with scattered
embedded thunderstorms was affecting kcou and kuin at taf
issuance. Rain will continue at both terminals until the parent
thunderstorm complex has moved farther away from the region. After
a break in the rain after 21 14z, another line of tsra is
expected to develop and move through the terminals after 21 19z.
Winds will be gusty even outside of thunderstorms, and both the
wind speeds and the wind gusts will tend to increase with time.
InitiallyVFR ceilings are expected to fall to MVFR at both
terminals by 21 12z.
Specifics for kstl, ksus, kcps: the northern end of a line of
thunderstorms was located over central mo at TAF issuance. This
line will continue moving eastward over the next few hours,
accompanied by a broader area of shra with scattered embedded
tsra. Winds will be gusty outside of the thunderstorms, and the
wind speeds and gusts will tend to increase with time during the
valid TAF period because wind speeds aloft will be increasing.
After a break in the rain during the day, another line of tsra is
expected to develop and move through the terminals after 21 22z.
Lsx watches warnings advisories
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
|St. Louis Regional Airport, IL||3 mi||32 min||ENE 15 G 24||10.00 mi||Overcast||54°F||46°F||78%||1014.2 hPa|
|St. Charles, St. Charles County Smartt Airport, MO||23 mi||33 min||ENE 18 G 29||10.00 mi||Light Rain and Breezy||54°F||46°F||75%||1013.3 hPa|
|St. Louis Lambert International Airport, MO||23 mi||36 min||E 18 G 29||10.00 mi||Light Rain and Breezy||57°F||46°F||67%||1012.4 hPa|
|Litchfield Municipal Airport, IL||23 mi||52 min||ENE 11 G 19||10.00 mi||Partly Cloudy||52°F||43°F||73%||1017.3 hPa|
Wind History from ALN (wind in knots)
|1 day ago||S|
|2 days ago||S||Calm||SE||SE||S||SE||S||S|
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GOES 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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Wind Forecast for St. Louis, MO (2,6,7,8)(on/off)  Help
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