An upper level low pressure system moved across the region, while a surface low developed along the Gulf Coast and tracked east. Precipitation overspread the region, as temperatures were in the 30s.
Every event with a place to put it; 39 filed by county or forecast zone are drawn at its center, in a lighter ring. Tap one for its entry below.
Deaths and injuries are direct and indirect together, as the offices filed them. Damage is property and crops in the dollars of the year, not adjusted for inflation, and only where an office estimated it.
The episode as NWS JAN wrote it up.
An upper level low pressure system moved across the region, while a surface low developed along the Gulf Coast and tracked east. Precipitation overspread the region, as temperatures were in the 30s. This resulted in a mix of sleet and snow for portions of the region until a transition to all snow. The highest snowfall accumulations were across eastern portions of Central Mississippi, where six to six and a half inches fell. Widespread two to four inches of snow fell across most of Central Mississippi and northeast Louisiana, generally along and north of the Natchez Trace corridor. Locations south of this, including portions of south central and southeast Mississippi received no snow or less than one inch of snow.
The local office's own words before the first event, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Jackson, MS wrote its last area forecast discussion before the first event at Jan 10, 7:04 PM CST, 26 minutes earlier.
Area Forecast Discussion
National Weather Service Jackson MS
704 PM CST Sun Jan 10 2021
...WINTER STORM WARNING IN EFFECT TONIGHT INTO MONDAY...
.UPDATE...
Updated for 00Z aviation discussion
&&
.AVIATION...
00Z TAF discussion:
Expect conditions to deteriorate as winter storm moves closer and
rain/snow and a little sleet possibly mixing into the overnight
precipitation. Not much changed in the details of the
forecast...rain/snow eventually mostly snow north of JAN...mostly
rain to the south with JAN very much in the transition zone btwn
the two regions. Conditions will improve from the west
tomorrow...precip ending by midday.
&&
.DISCUSSION...
Tonight and Monday: A winter storm will affect the CWA presenting a
challenging forecast of rain, snow, and a wintry mix through Monday
morning before the precipitation tapers off from the west during the
afternoon. Mid afternoon visible satellite imagery and surface
analysis had a 1018mb low just off the southeast Texas coast
tracking northeast. Water vapor imagery/RAP analysis showed the
circulation around a closed low spinning over north central Texas.
This closed low will track along the Red River valley and across the
ArkLATex tonight, then northeast toward the Tennessee valley Monday
as it slowly weakens. The surface low will track east northeast
across the northern Gulf remaining just off shore of the Florida
panhandle by Monday evening. Together these features will bring
widespread precipitation to our CWA tonight and Monday. Considering
the various model blends, soundings etc., the greatest overall
change to previous thinking was that the transition axis between
frozen precipitation to liquid precipitation was shifted a little
farther south toward the Natchez Trace. Heaviest snow accumulations
are expected across our northeast Louisiana Parishes and across our
MS delta counties where two to four inches are expected. Surrounding
this area up to two inches of snow is possible. Our Pine Belt area
is expected to see mostly rain through the period. Temperatures this
evening will start out above freezing helping to mitigate initial
accumulations but as the night progresses temperatures will drop to
freezing and accumulations will likely begin on elevated surfaces
making for hazardous driving conditions. Accumulations could down
tree limbs resulting in power outages. The precipitation will
continue Monday morning but as the surface low in the northern Gulf
shifts farther east of our CWA and the upper level low moves farther
north of our CWA, the precipitation will taper off from the west.
Temperatures will remain much colder than normal and may not make it
out of the 30s at most locations but highs are expected to be well
above freezing areawide contributing to the melting of any snow
accumulations. /22/
Monday night through next Saturday: By tomorrow night, the
previous strong synoptic upper jet/shortwave trough will be
becoming more of an open wave & moving into the Tennessee Valley &
previous weather maker (i.e. surface low) will be moving along
the northern Gulf coast off to the east. All lingering snowfall
will have moved eastward as well. Due to drier air aloft & strong
~1030mb sfc high pressure ridge building in, extremely efficient
radiational cooling will be possible. Guidance has progged better
drying & lessening cloud cover. With a likely snowpack & highs
Monday struggling to reach the upper 30s, we shouldn't be limited
on an extremely favorable rad cooling environment. Lows will
generally be in the mid-upper 20s. However, newer guidance trends
have progged even better cooling in the area of our heaviest
snowpack & strong CAA from northeast Louisiana & central-northwest
& north Mississippi. Wind chills could get into the lower 20s &
can't rule out some very brief wind chills possibly into the upper
teens. In addition, refreezing & areas of icing are definitely
possible.
As strong high pressure & shortwave ridging builds in Tuesday, we
will continue a slow warming trend into the mid 40s-low 50s. Cut
highs Tuesday due to full sun & warmth also going into actual
melting of the snow on the ground. With increasing heights & dry
profiles, a gradual warming trend in lows into the mid-upper 20s
Tuesday night, near or above freezing Thursday night & warming
after. A weak shortwave trough will move through the region by
midweek but will only bring some brief increase in mid-upper level
clouds. Highs will continue to warm into the mid-upper 50s early-mid
week to low 60s by late week. Models continue to prog a deep
longwave trough digging down by late week, with some model
disagreement on amplitude. The 12Z Euro is more amplified & colder,
while other guidance has progged slightly less & to our north.
Regardless, another cold front & continental polar airmass will dive
down into the area by the end of the work week & start of the
weekend (i.e. Saturday & early Sunday). Some limited guidance have
some shower potential in the Interstate 59 corridor but confidence
is lower. This synoptic & surface setup will lead to cooler thermal
profiles, CAA & cooler late week & start to next weekend. In
addition, another strong cold front could bring another round of
rain & interesting weather just after the end of the period. Timing
may be slower & thus, progged inconsistencies in global guid. makes
confidence lower. /DC/
&&
.PRELIMINARY POINT TEMPS/POPS...
Jackson 31 39 25 46 / 94 85 0 0
Meridian 31 40 28 49 / 88 89 10 0
Vicksburg 31 38 25 46 / 95 69 0 0
Hattiesburg 33 42 29 52 / 90 93 10 0
Natchez 31 38 26 49 / 97 78 0 0
Greenville 31 38 26 47 / 82 47 0 0
Greenwood 31 38 25 47 / 80 68 0 0
&&
.JAN WATCHES/WARNINGS/ADVISORIES...
MS...Winter Weather Advisory until noon CST Monday for MSZ018-026-
029>033-038-039-044-045-049-050-053-054-059-060.
Winter Storm Warning until noon CST Monday for MSZ019-025-027-
028-034>037-040>043-047-048.
LA...Winter Weather Advisory until noon CST Monday for LAZ026.
Winter Storm Warning until noon CST Monday for LAZ007>009-015-
016-023>025.
AR...Winter Storm Warning until noon CST Monday for ARZ074-075.
&&
HJSHazardous Weather Outlook National Weather Service Jackson MS 323 PM CST Sun Jan 10 2021 ARZ074-075-LAZ007>009-015-016-023-025-MSZ027-028-034>037-040>044- 047-048-112130- Ashley-Chicot-Morehouse-West Carroll-East Carroll-Richland- Madison LA-Franklin LA-Tensas-Carroll-Montgomery-Washington- Humphreys-Holmes-Attala-Issaquena-Sharkey-Yazoo-Madison MS-Leake- Warren-Hinds- 323 PM CST Sun Jan 10 2021 This hazardous weather outlook is for portions of southeast Arkansas, northeast Louisiana, central Mississippi, north central Mississippi, northwest Mississippi, and west central Mississippi. .DAY ONE...Tonight and Monday SNOW THREAT...Elevated TIMING...Tonight through Monday Snow and sleet accumulations of 2 to 4 inches are expected from this evening through Monday morning. Roads will become snow covered resulting in hazardous driving conditions, including for the Monday morning commute. (https://www.weather.gov/images/jan/graphicast/1.png) .DAYS TWO THROUGH SEVEN...Monday night through Saturday The probability for widespread hazardous weather is low. .SPOTTER CALL TO ACTION STATEMENT... The activation of storm spotters, HAM radio operators, and emergency management personnel in support of severe weather operations is not expected through next Saturday. LAZ024-026-MSZ018-019-025-026-029>033-038-039-045-046-049>051-053- 054-059-060-112130- Catahoula-Concordia-Bolivar-Sunflower-Leflore-Grenada-Webster- Clay-Lowndes-Choctaw-Oktibbeha-Winston-Noxubee-Neshoba-Kemper- Rankin-Scott-Newton-Claiborne-Copiah-Jefferson-Adams- 323 PM CST Sun Jan 10 2021 This hazardous weather outlook is for portions of northeast Louisiana, central Mississippi, east central Mississippi, north central Mississippi, and southwest Mississippi. .DAY ONE...Tonight and Monday SNOW THREAT...Limited TIMING...Tonight through Monday Snow and sleet accumulations of up to 2 inches are expected from this evening through Monday morning. Roads, especially bridges, may become snow covered and slick, including for the Monday morning commute. (https://www.weather.gov/images/jan/graphicast/1.png) .DAYS TWO THROUGH SEVEN...Monday night through Saturday The probability for widespread hazardous weather is low. .SPOTTER CALL TO ACTION STATEMENT... The activation of storm spotters, HAM radio operators, and emergency management personnel in support of severe weather operations is not expected through next Saturday. MSZ052-055>058-061>066-072>074-112130- Lauderdale-Simpson-Smith-Jasper-Clarke-Franklin MS-Lincoln- Lawrence-Jefferson Davis-Covington-Jones-Marion-Lamar-Forrest- 323 PM CST Sun Jan 10 2021 This hazardous weather outlook is for portions of central Mississippi, east central Mississippi, and south central Mississippi. .DAY ONE...Tonight and Monday The probability for widespread hazardous weather is low. .DAYS TWO THROUGH SEVEN...Monday night through Saturday The probability for widespread hazardous weather is low. .SPOTTER CALL TO ACTION STATEMENT... The activation of storm spotters, HAM radio operators, and emergency management personnel in support of severe weather operations is not expected through next Saturday. 1 && ...HAZARD LEGEND... *SNOW* Extreme...Roads impassable and widespread power outages likely. Significant...Dangerous travel conditions and numerous power outages possible. Elevated...Difficult travel conditions and sporadic power outages possible. Limited...Bridges may be snow-covered. ...USEFUL WEATHER WEB PAGES (URLS)... NWS JAN Home page... https://www.weather.gov/jan Stay Aware, Stay Safe NWS JAN Briefing Page... https://www.weather.gov/jan/safe Latest Weather Briefing... https://www.weather.gov/jan/weather_briefing Find NWS JAN on Facebook... https://www.facebook.com/NWSJacksonMS Follow NWS JAN on Twitter... @NWSJacksonMS Follow NWS JAN on Youtube... https://www.youtube.com/user/NWSJacksonMiss ...ADDITIONAL URLS FOR WINTER WEATHER ISSUES... Current Winter Weather... https://www.weather.gov/jan/safe_Winter Day 1 through 3 Winter Threats... https://www.wpc.ncep.noaa.gov/wwd/winter_wx.shtml Winter Impact Discussion... https://www.wpc.ncep.noaa.gov/discussions/qpfhsd.html
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</html>The national radar mosaic for the moment the first event began.
33 heavy snow, 6 winter weather. Local standard time, as filed.
Up to two inches of snow accumulated in the northwest part of Adams County. Washington observed two inches of snow. The southeast part of the county received less than one inch of snow.
Heavy snow fell across the region. Accumulations of up to three and a half inches occurred in Warren County, from Vicksburg to Bovina. An area around Vicksburg received four inches of snow. The western part of the county received around two inches of snow.
Heavy snow fell across the region. Accumulations of two to two and a half inches fell across Claiborne County.
Snow fell across the region. Accumulations up to one inch fell across far northern Lawrence County.
Snow fell across the region. Accumulations up to one inch fell across Lincoln County, especially in the northwest part of the county.
Snow fell across the region. Accumulations up to one inch fell across Franklin County.
Snow fell across the region. Accumulations up to one inch fell across Smith County.
Snow fell across the region. Accumulations up to one inch fell across Simpson County.
Heavy snow fell across the region. Accumulations of two to three inches fell across the northwest half of Copiah County. Accumulations of around three inches occurred near the Hinds and Copiah county border.
Heavy snow fell across the region. Amounts ranged from 2 to 3 inches in Hinds County.
Heavy snow fell across the region. Accumulations up to two inches occurred across the majority of Jefferson County. Accumulation of two to three inches occurred in the far northwest portion of the county.
Heavy snow fell across the region. Accumulations of two to three inches occurred across Madison County.
Heavy snow fell across the region. Amounts around two to three inches fell, especially in the western part of the county. Up to two inches of snow fell in the eastern part. Minter City received two inches of snow.
Heavy snow fell across the region. Amounts ranged from one and a half to two and a half inches across the northern part of Rankin County, mainly north of I-20. To the south, amounts of one half to one inch occurred.
Heavy snow fell across the region. Amounts around two to three inches fell across the county. Elliott observed 3.5 inches of accumulation.
Heavy snow fell across the region. Widespread amounts of one to two inches occurred across the county. The highest totals were near the southern county border with Humphreys County, where amounts of near two and a half inches occurred.
Heavy snow fell across the region. Accumulations of two to three inches were widespread across Yazoo County. The highest accumulations occurred in the northwest portion of the county, where amounts of three to four inches occurred.
Heavy snow fell across the region. Accumulations of three inches were widespread across Holmes County. The highest accumulations occurred in the southwest portion of the county, where amounts of three to four inches occurred.
Heavy snow fell across the region. The highest snowfall accumulations occurred in the northern part of Scott County. Two to three inches accumulated generally north of I-20, whereas amounts up to two inches fell south of I-20. Ludlow observed 3.5 inches of snow.
Heavy snow fell across the region. The highest snowfall accumulations occurred in the eastern part of the county, near the Leake-Neshoba county line. Widespread two to three inches of snow fell across the county. Three inches occurred in Lena and four and a half inches fell in Edinburg.
Heavy snow fell across the region. Amounts ranged from 2 to 3 inches in Washington County.
Heavy snow fell across the region. Accumulations of up to two inches occurred in Bolivar County.
Heavy snow fell across the region. Accumulations of up to three and a half inches occurred in southern Issaquena County. The northern parts of the county saw around one to two inches of snow.
Heavy snow fell across the region. Accumulations of up to three and a half inches occurred in Sharkey County.
Heavy snow fell across the region. Accumulations of two to three inches were common across Humphreys County. Belzoni observed three inches of snow.
Heavy snow fell across the region. Three to six inches of snow accumulated across the county, with the highest totals being recorded in the northern part near the Winston-Neshoba county line. Locally higher amounts of six to eight inches fell in this area. Stallo recorded six and a half inches of snow while Philadelphia observed three inches of snow.
Heavy snow fell across the region. Accumulations two to three inches were widespread across the county. The highest accumulations were in the eastern part of the county, where three to four inches fell. McCool recorded three and a half inches of snow.
Heavy snow fell across the region. Amounts ranged from 2 to 3 inches in Choctaw County, with three and a half inches falling in Ackerman.
Heavy snow fell across the northern part of Newton County. Snowfall accumulation up to three inches fell near Union. Other portions of the county received up to an inch in some locations. Accumulations were less generally along and south of the I-20 corridor, where amounts were less than one inch.
Heavy snow fell across the region. Accumulations of two to three inches were widespread across Carroll County.
Heavy snow fell across the region. Three to six inches of snow accumulated across the county, with the highest totals being recorded in the southern part near the Winston-Neshoba county line. Locally higher amounts of six to eight inches fell in this area. Six inches of snow fell in both Louisville and Noxapater. Six and a half inches of snow fell in Nanih Waiya.
Heavy snow fell across the region. Two to three inches of accumulation were widespread across the county. Locally higher amounts fell, including three and a half inches of snow in Winona.
Heavy snow fell across the region. Three to four inches of snow was widespread across the county. The highest snowfall accumulation was in the southeast corner of the county. Four inches of snow fell in Oktoc and near Starkville.
Snow fell across the region. Accumulations up to one inch fell across Lauderdale County.
Heavy snow fell across the region. Two to four inches fell across the county and the highest amounts fell in the southern half of the county. Three and a half inches of snow was observed in Grady.
Heavy snow fell across the region. Two to four inches of snow fell across the county.
Heavy snow fell across the region. Three to four inches of snow fell across the county. Four inches of snow fell in Columbus, three and a half inches of snow fell near New Hope and Caledonia. Steens and Columbus Air Force Base recorded three inches of snow.
Heavy snow fell across the region. Three to six inches of snow accumulated across the county, with the highest amounts being in the western half of the county. Four and a half inches of snow accumulated in Brooksville.
Heavy snow fell across the region. Snowfall accumulations of four to six inches occurred in the northwest portion of the county. There was a sharp gradient to amounts of near an inch in the southern part of the county.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Mississippi in 2021Every state in 2021This day in weather historyWarnings in Mississippi, January 2021
NOAA National Centers for Environmental Information, Storm Events Database, compiled from the National Weather Service’s monthly Storm Data. Complete through 2026-06; NCEI adds each month about 75 days after it ends and revises past years a few times a year. Rebuilt 2026-09-24. Each event’s entry at NCEI: 948471, 948455, 948456, 950767, 950768, 950772, 950773, 950774, 950776, 940876, 948468, 948570, 948484, 948569, 950168, 950762, 948571, 948572, 950183, 950192, 943656, 943658, 948452, 948453, 948488, 950392, 950385, 942785, 948450, 948573, 950394, 950401, 950405, 950414, 950403, 950404, 950406, 950408, 950413.