Thursday, August13, 2020
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Marine Weather and Tides
Madison, 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 7:48PM Thursday August 13, 2020 12:52 PM CDT (17:52 UTC) Moonrise 12:06AMMoonset 2:25PM Illumination 27% Phase: Waning Crescent; Moon at 24 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 Madison, MS
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location: 32.47, -90.13     debug


Area Discussion for - Jackson, MS
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FXUS64 KJAN 131439 AAA AFDJAN

Area Forecast Discussion . UPDATED National Weather Service Jackson MS 939 AM CDT Thu Aug 13 2020

UPDATE. Updated for morning discussion.

DISCUSSION. Local radars remain lit up this morning with storms producing heavy rainfall over the central portions of our CWA. Additional storms with locally heavy rain will remain possible today across the remainder of our CWA. A shortwave trough axis was noted shifting east of Interstate 55 this morning. This axis will continue shifting east this afternoon resulting in northwest flow aloft across our CWA. This flow aloft is expected to help spawn additional storm development this afternoon and early evening leading to the potential for isolated severe storms capable of damaging wind gusts and hail up to quarter size. /22/

Prior discussion below:

Convection has continued to fire over west central MS as an elevated boundary has taken shape from north to south. Southwest to northeast low layer flow of 345K theta-e air across this boundary has resulted in good ascent and the repeated generation of convection. The RAP is showing this boundary well and continues it in the area through the morning then diminishes it during the afternoon. Until then, periods of showers and thunderstorms can be expected over west central MS which may pose a limited flood risk as storms move repeatedly over the same areas./GG/

Prior discussion below:

Today and Tonight: Persistent mostly warm top convection continues to fester this morning over the ArkLaMiss Delta region as 0-3km theta-e advection occurs in the deep tropical airmass (PWs ~ 2.5"). While cells have been and will continue to be slow moving given the 10-15 knot 0-3km bulk shear vectors, the absence of any low level feature to focus on will keep amounts only locally heavy as has been the case so far. Recent convective rainfall amounts have done little to create an environment for flooding as seen in the 1hr FFG values near 3.5" over much of the area. As such, will not continue the limited flooding threat in the HWO for today.

Despite the difficulties in the CAM data resolving this early morning convection, their diurnal convective solutions for later today still seem reasonable with enhanced coverage over central sections given the location of the slow moving mid level shortwave, best ascent and moisture./GG/

Friday through Sunday: A hot/humid pattern with ongoing potential for showers and storms will continue through this weekend. The region remains on the eastern periphery of a ridge centered over the Four Corners and extending across the Southern Plains. An unhurried shortwave and associated weak surface low will serve as a trigger for convective development as they move eastward across the Mid South. Similar to what was being advertised for this morning, CAM guidance is once again hinting at ongoing convection moving into the ArkLaMiss Delta on Friday morning. Through the day, the low level convergence axis (and better rain chances) will shift eastward extending from South MS into AL. By Saturday and Sunday, these features will shift east of the area; however, considerable deep layer moisture will remain and additional weak disturbances will promote continued isolated to scattered convection. Nevertheless, decreasing precip coverage should result in increasing daytime temperatures. With moderately steep mid level lapse rates and marginally strong deep layer shear forecast, a few stronger storms will be possible each day as we have seen in recent days. Rainfall could also be locally heavy given the moist environment and some potential for training convection along these low level convergence axes.

Dewpoints will remain rather high through this time frame, running in the mid to upper 70s in most areas during the day. Outside of convective activity with temps rising into the lower to middle 90s, this will result in heat indices near 105F at times. The highest confidence of this occurring is roughly west of I-55 where rain chances are somewhat lower. Again, with the potential for early day convection on Friday, there is some uncertainty with regards to reaching these thresholds but there is still conditional potential for heat indices around 105F in the western areas. Given this, the currently advertised limited heat stress in the HWO/graphics will be maintained.

Monday through Wednesday: A break from the current pattern is in the cards for next work week as a summertime cold front moves across the area. Though surface winds will begin to shift as early as Sunday, the actual theta gradient/change in airmass won't reach the area until the day on Monday. PW, which has been running in the 1.5 to 2 inch range, will fall to around or even below 1 inch in most areas by midweek. POPs will trend downward from north to south and through time as drier air begins to work into the area. More pleasant and slightly cooler conditions are expected Tuesday and Wednesday in the wake of the front. /DL/

AVIATION. 12Z TAF discussion: Scattered to numerous showers and thunderstorms will continue through the day. While VFR conditions will become prevalent by mid morning, periodic IFR/MVFR conditions can be expected where storms occur./GG/

PRELIMINARY POINT TEMPS/POPS. Jackson 90 72 89 73 / 61 35 69 22 Meridian 90 72 90 73 / 69 48 73 30 Vicksburg 91 74 91 75 / 80 30 54 20 Hattiesburg 90 73 90 73 / 69 34 74 26 Natchez 91 74 90 74 / 47 20 54 16 Greenville 89 73 89 72 / 60 31 44 19 Greenwood 88 72 89 71 / 73 35 45 22

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



DL/22/GG


Weather Reporting Stations
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Jackson, Jackson International Airport, MS10 mi58 minWSW 410.00 miLight Rain75°F72°F90%1016.9 hPa
Jackson, Hawkins Field Airport, MS11 mi59 minSW 410.00 miLight Rain74°F71°F91%1017 hPa
JB Williams Airport, MS19 mi57 minN 010.00 miLight Drizzle73°F73°F100%1017.6 hPa

Link to 5 minute data for KJAN

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Last 24hrSW5W8W7W5CalmSE10SE5E3SE5SE4SE3S4----S3S5CalmW5NW3CalmNW7W3S4SW4
1 day agoSW5W7SW9W9W8W7W5CalmCalmCalmCalmSE10
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SE10S7S3CalmSW3CalmS4CalmCalmW5W5
2 days agoW7W6W4W8W5W3W5CalmCalmCalmCalmCalmSE3SE3CalmCalmCalmCalmCalmW4W653NW6

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.
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Wind Forecast for Jackson, MS (13,3,4,5)
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Ground Weather Radar Station Jackson/Brandon, MS
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