Saturday, December16, 2017 L-36.com


Marine Weather and Tides
Grenada, MS

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 6:57AMSunset 4:56PM Saturday December 16, 2017 10:45 AM CST (16:45 UTC) Moonrise 6:20AMMoonset 5:05PM Illumination 3% Phase: Waning Crescent; Moon at 28 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 Grenada, MS
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location: 33.78, -89.81     debug


Area Discussion for - Jackson, MS
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Fxus64 kjan 161601 aaa
afdjan
area forecast discussion... Updated
national weather service jackson ms
1001 am cst Sat dec 16 2017

Update
Updated for morning discussion.

Discussion
After a chilly start this morning temperatures were warming as
expected. The surface high centered over our area early this
morning has shifted east and a light return flow is expected
today. Temperatures will top out close to normal this afternoon.

The main change with this update was to increase cloud cover
across our southern zones as a band of mid level clouds was
thicker than anticipated. This band will spread north and thin
this afternoon. 22
prior discussion below:
today through tonight: a chilly polar airmass is entrenched over
the arklamiss region as of early this morning with temperatures
falling well into the 20s over most of the forecast area. This
airmass will be slow to modify this morning, but the slow moving
cut-off low crossing northern mexico will eject quickly eastward
toward our region as a major upstream trough digs southward
through the western conus. The rapid approach of the low will
cause rapid mass northward transport of anomalously moist air for
mid december (precipitable water > 1.5 inches, ~3 sds) into the
area. Expect showers and perhaps a few elevated thunderstorms to
develop rapidly and move into western portions of the area prior
to daybreak Sunday, but not expecting too many run-off problems
given the antecedent drought conditions and progressive nature of
initial activity. This could be a different story looking down the
road. Otherwise, expect a much milder Saturday night for most of
the arklamiss given the modifying airmass and increasing cloud
cover. Ec
Sunday through the work week: confidence is increasing in a
dynamic, wet pattern unfolding from Sunday through next weekend as
models come into better agreement.

Rain will continue to spread into the region on Sunday as a
deamplifying upper level shortwave trough embedded in SW flow
progresses over the area. Significant lift and bountiful moisture,
by the way of pwats of 1.5"-1.8", will result in heavy rainfall at
times. However, as mentioned previously, both the progressive
nature of this system and recent dry conditions will help lessen
the flash flood threat. Even though the best instability will
remain offshore over the northern gulf, sufficient bulk shear
magnitudes in the ranges of 45-50kts between 0-3km and 50-60kts
between 0-6km indicate that there could be some strong storms
mainly in the pinebelt region on Sunday.

The upper level SW flow regime will remain intact through early
week while flow from the south in the mid to low levels will
continue to supply the region with ample moisture from the gulf.

This will result in rain chances sticking around through Monday
and Tuesday. A deep cutoff low will begin to cross the southern
plains as the week progresses, approaching the lower ms valley
region by Wednesday. A very moist atmosphere will exist ahead of
this system as it brings some significant height falls to the
region. There are still some differences spatially and temporally
between the GFS and euro, but our best chance for organized storms
during the week will exist as the aforementioned disturbance
traverses the region Tuesday night through Wednesday.

The Sun may finally make an appearance later in the afternoon on
Wednesday or early Thursday as dry air finally filters into the
region behind this disturbance and some weak ridging builds into
the upper levels. However, this quiet period will be short lived
as rain chances begin to increase once again as the upper level
pattern transitions back to a SW flow regime in response to a deep
trough splitting off from the mean flow and diving towards the sw
us mexican border. Jpm3

Aviation
12z TAF discussion:
vfr conditions and mostly light and variable wind will prevail
through this evening. Expect lowering ceilings and increasing shra
chances prior to daybreak Sunday morning in the glh gwo jan hks
hbg area. Ec

Preliminary point temps pops
Jackson 60 44 66 55 1 45 84 34
meridian 57 42 63 54 1 10 82 41
vicksburg 60 44 66 52 1 79 83 20
hattiesburg 57 43 70 60 1 11 83 45
natchez 59 46 69 57 3 74 84 37
greenville 59 43 62 48 0 90 79 15
greenwood 60 41 62 48 0 76 84 18

Jan watches warnings advisories
Ms... None.

La... None.

Ar... None.

Jpm3 22 ec


Weather Reporting Stations
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Greenwood, Greenwood-LeFlore Airport, MS24 mi53 minS 610.00 miFair46°F32°F58%1026.3 hPa

Wind History from GWO (wind in knots)
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Last 24hrN5N433E4CalmCalmCalmCalmCalmS3CalmS3CalmSW3CalmCalmCalmCalmCalmCalmCalmCalmS6
1 day agoNE6Calm--NW55N7N6N7N7N8N8N5N6N4NW3CalmCalmCalmCalmCalmCalmCalmCalmCalm
2 days agoS11SW13S18
G23
SW14
G20
SW16SW17
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S10SW9SW9SW8SW7SW6SW6SW6SW4S4S6S3S3S3S3CalmCalmCalm

Tide / Current Tables for
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Tide / Current Tables for
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Weather Map and Satellite Images
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Weather Map
wmap_A
IR Satellite Image from GEOS
east_satellite

GOES Local Image of Midwest    EDIT
Geos

Wind Forecast for Jackson, MS (11,2,3,4)
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Ground Weather Radar Station Columbus AFB, MS
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weather_mapweather_map weather_map

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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.