Saturday, August15, 2020
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Marine Weather and Tides
Grenada, MS

Version 3.4 		NOTICE
12/16/2019 NOAA is having trouble with requests that include wind gusts. I am posting graphs without wind gusts until it gets fixed.
10/9/2019 Updated the Marine Zones.
9/4/2019 Fixed the weather maps due to NOAA moving them.
7/25/2019 New feature in the Airports section gives a link to 5 minute updates for data reports.
Sunrise 6:22AMSunset 7:47PM Saturday August 15, 2020 11:29 AM CDT (16:29 UTC) Moonrise 2:33AMMoonset 5:24PM Illumination 11% Phase: Waning Crescent; Moon at 26 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 151522 AFDJAN

Area Forecast Discussion National Weather Service Jackson MS 1022 AM CDT Sat Aug 15 2020

UPDATE. Updated for morning discussion.

DISCUSSION.

The near term forecast is generally on track, and a limited threat for dangerous heat stress over western portions of the ArkLaMiss region remains valid. The 12z JAN raob revealed the anticipated much drier air aloft with T/Td depressions ranging from 20 to 50 deg C above the 3 km level. This dry air will help to suppress convective precip potential today for most of the area, but will maintain low end chances over southern most portions of the area where deeper moisture is still in place. /EC/

Prior discussion below:

Today and tonight . Once again, we're dealing with early morning convection . this time across southern portions of the area. Scattered showers and storms will remain possible along a corridor of low level convergence and deeper moisture that will persist from northeast LA across south MS, wavering farther south through the day. Elsewhere, mostly dry conditions are expected with only isolated shower activity through the day as a shortwave pulls east of the area and deep layer moisture decreases. Dry conditions are expected areawide overnight.

Patchy fog has developed this morning mainly in areas that received heavier rain yesterday. Though no dense fog was being observed thus far, we will continue to monitor for potential mention in the HWO/graphics, or an advisory if conditions deteriorate further.

With less disruption to insolation from rain/clouds today and considerable low level moisture still lingering in spite of decreasing deep layer moisture, heat indices will rise into the triple digits across much of the area today, with values near 105 possible mainly west of I-55 where we will advertise limited heat stress concerns for today. /DL/

Sunday through Friday . The bulk of the extended forecast is dominated by deep ridging aloft over the western half of the CONUS. The southeastern US is in an upper trough . either with northwesterly flow aloft or later in the week . part of a wave breaking out of the northern stream. The temperatures remain warm through the forecast . with plenty of heat building over the SW to tap in to. Tomorrow still has highs in the low to mid 90s and dewpoints in the Delta in the mid 70s, resulting in heat indices in the mid 100s. Issuing a heat stress graphic, especially with the timing of the next round of convection. The first round of precip may happen on Sunday, with a weak wave moving over the region. CAMS and GFS/ECMWF all pushing through some sct/iso showers thunderstorms in the late afternoon/evening (after peak heating). Have had to expand those pops a bit as the NBM has gone more dry than is currently depicted . especially given the available moisture and general diffluence aloft.

Generally speaking, the dewpoints start on a drying trend as slightly drier air moves into the region. Temps remain in the upper 80s/low 90s through the end of the forecast. After a mostly dry start to the work week, precip starts edging into the southeast due to outflows from convection along the coast. The feedback loop begins, with the afternoon showers and convection spreading back into Central MS and the ArkLaMiss region by Thursday evening.

AVIATION. 12Z TAF discussion: Patchy areas of fog and low clouds are impacting the region this morning. Ceilings and visbys are anticipated to quickly return to VFR thresholds over the next hour or two. Scattered SHRA/TS are possible mainly across South MS and Central LA during the daytime. Additional patchy fog or low clouds are possible near daybreak Sunday morning. Otherwise, VFR conditions are expected through the TAF period. /DL/

PRELIMINARY POINT TEMPS/POPS. Jackson 92 71 93 69 / 9 0 18 18 Meridian 91 70 93 71 / 17 5 10 8 Vicksburg 93 72 93 69 / 10 0 20 17 Hattiesburg 92 73 94 72 / 39 6 9 5 Natchez 92 73 93 70 / 33 2 17 16 Greenville 92 72 91 67 / 7 2 22 8 Greenwood 93 70 93 67 / 7 1 23 11

JAN WATCHES/WARNINGS/ADVISORIES. MS . None. LA . None. AR . None.



Weather Reporting Stations
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Greenwood, Greenwood-LeFlore Airport, MS24 mi36 minNW 410.00 miMostly Cloudy87°F77°F72%1014.7 hPa

Link to 5 minute data for KGWO

Wind History from GWO (wind in knots)
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Last 24hr5SW4SW53SW3CalmSW63CalmCalmS3SW5S3SW3CalmSW3SW3S3CalmS3Calm3N5NW4
1 day agoS5CalmS6S8S6SW6SW7SW6SW3SW4S5CalmS3SW3CalmCalmSW3S3S4CalmS3S43--
2 days ago3NW45S9SW6SW3CalmSE8E5CalmS4CalmCalmCalmS3NW3E4SE4CalmCalmSW3CalmSE4SW6
Tide / Current Tables for
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Weather Map
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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.
Link to Loop

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Wind Forecast for Jackson, MS (12,3,4,5)
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Ground Weather Radar Station Columbus AFB, MS
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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 numerous 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.