Alert archive / Missouri / Winter Storm Warnings in 2020

Winter Storm Warning 4, NWS Kansas City, MO

December 29, 2020Atchison County, Doniphan County, Kansas; 14 counties in Missouri

NWS Kansas City, MO issued this winter storm warning at Dec 29, 2020, 3:32 AM CST for Atchison County, Doniphan County, Kansas; 14 counties in Missouri. It took effect at Dec 29, 2020, 6:00 AM CST. It was in force for 22 hr. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued
Dec 29, 2020, 3:32 AM CST (09:32 UTC)
In effect from
Dec 29, 2020, 6:00 AM CST
Expired
Dec 30, 2020, 3:41 AM CST
In force
22 hr
Issued by
NWS Kansas City, MO

Counties Atchison County, KS, Doniphan County, KS, Andrew County, MO, Atchison County, MO, Buchanan County, MO, Daviess County, MO, DeKalb County, MO, Gentry County, MO, Grundy County, MO, Harrison County, MO, Holt County, MO, Mercer County, MO, Nodaway County, MO, Putnam County, MO, Sullivan County, MO, Worth County, MO

The radar

The Pleasant Hill radar (KEAX), 146 km from the middle of the area, began a volume at 09:33 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

The nearest sounding before it

Topeka, KS (KTOP), launched 00:00Z, 9.5 hours before the alert went out and 165 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.

Skew-T log-pSkew-T log-p diagram, Topeka, KS at 00:00Z on 2020-12-29Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Topeka, KS at 00:00Z on 2020-12-29The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -80 square meters per square second.1939587897117Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
1252 m above ground
0-6 km bulk shear
75 kt
0-1 km storm-relative helicity
-80 m²/s²
0-3 km storm-relative helicity
12 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

327 
WWUS43 KEAX 290932
WSWEAX

URGENT - WINTER WEATHER MESSAGE
National Weather Service Kansas City/Pleasant Hill MO
332 AM CST Tue Dec 29 2020

...Wintry precipitation is expected to impact the region Tuesday
morning through Wednesday morning...

MOZ001>004-011>013-291745-
/O.UPG.KEAX.WW.Y.0018.201229T1200Z-201230T1200Z/
/O.NEW.KEAX.WS.W.0004.201229T1200Z-201230T1200Z/
Atchison MO-Nodaway-Worth-Gentry-Holt-Andrew-De Kalb-
Including the cities of Tarkio, Rockport, Fairfax, Maryville, 
Grant City, Albany, Stanberry, King City, Mound City, Oregon, 
Maitland, Forest City, Craig, Savannah, Country Club Villa, 
Maysville, Stewartsville, Osborn, Union Star, and Clarksdale
332 AM CST Tue Dec 29 2020

...WINTER STORM WARNING IN EFFECT UNTIL 6 AM CST WEDNESDAY...

* WHAT...Heavy mixed precipitation expected. Light snow this
  morning is expected to transition to sleet and freezing rain,
  before transitioning to rain tonight. Total snow accumulations
  of 2 to 4 inches and ice accumulations of up to half an inch.

* WHERE...Portions of northwest Missouri.

* WHEN...Until 6 AM CST Wednesday.

* IMPACTS...Power outages and tree damage are likely due to the 
  ice. Travel could be nearly impossible. The hazardous 
  conditions could impact the morning or evening commute.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If you must travel, keep an extra flashlight, food, and water in
your vehicle in case of an emergency. 

The latest road conditions for the state you are calling from can
be obtained by calling 5 1 1.

&&

$$

KSZ025-102-MOZ020-291745-
/O.UPG.KEAX.WW.Y.0018.201229T1200Z-201230T0000Z/
/O.NEW.KEAX.WS.W.0004.201229T1200Z-201230T1200Z/
Atchison KS-Doniphan-Buchanan-
Including the cities of Atchison, Wathena, Elwood, Troy, 
Highland, St. Joseph Airport, and St. Joseph
332 AM CST Tue Dec 29 2020

...WINTER STORM WARNING IN EFFECT UNTIL 6 AM CST WEDNESDAY...

* WHAT...Heavy mixed precipitation expected. Light snow this
  morning is expected to transition to sleet and freezing rain,
  before transitioning to rain early this evening. Total snow 
  accumulations of up to two inches and ice accumulations of two 
  tenths to three tenths of an inch.

* WHERE...In Kansas, Atchison KS and Doniphan Counties. In 
  Missouri, Buchanan County.

* WHEN...Until 6 AM CST Wednesday.

* IMPACTS...Power outages and tree damage are likely due to the 
  ice. Travel could be nearly impossible. The hazardous 
  conditions could impact the morning or evening commute.


PRECAUTIONARY/PREPAREDNESS ACTIONS...

If you must travel, keep an extra flashlight, food, and water in
your vehicle in case of an emergency. 

The latest road conditions for the state you are calling from can
be obtained by calling 5 1 1.

&&

$$

MOZ005>007-014>016-291745-
/O.UPG.KEAX.WW.Y.0018.201229T1800Z-201230T1200Z/
/O.NEW.KEAX.WS.W.0004.201229T1200Z-201230T1200Z/
Harrison-Mercer-Putnam-Daviess-Grundy-Sullivan-
Including the cities of Bethany, Princeton, Mercer, Unionville, 
Gallatin, Jamesport, Trenton, Milan, and Green City
332 AM CST Tue Dec 29 2020

...WINTER STORM WARNING IN EFFECT UNTIL 6 AM CST WEDNESDAY...

* WHAT...Heavy mixed precipitation expected. Snow this morning is
  expected to transition to sleet and freezing rain mid day and
  continue into this evening. Total snow accumulations of 2 to 4 
  inches and ice accumulations of up to three tenths of an inch.

* WHERE...Portions of north central Missouri.

* WHEN...Until 6 AM CST Wednesday.

* IMPACTS...Power outages and tree damage are likely due to the 
  ice. Travel could be nearly impossible. The hazardous 
  conditions could impact the morning or evening commute.


PRECAUTIONARY/PREPAREDNESS ACTIONS...

If you must travel, keep an extra flashlight, food, and water in
your vehicle in case of an emergency. 

The latest road conditions for the state you are calling from can
be obtained by calling 5 1 1.

&&

$$

MOZ008-017-291745-
/O.EXT.KEAX.WW.Y.0018.201229T1500Z-201230T1200Z/
Schuyler-Adair-
Including the cities of Lancaster, Queen City, Greentop, Downing,
Glenwood, and Kirksville
332 AM CST Tue Dec 29 2020

...WINTER WEATHER ADVISORY NOW IN EFFECT FROM 9 AM THIS MORNING
TO 6 AM CST WEDNESDAY...

* WHAT...Mixed precipitation expected. Total snow accumulations 
  of 1 to 3 inches and ice accumulations up to 0.25" of an inch.

* WHERE...Portions of north central and northeast Missouri.

* WHEN...From 9 AM this morning to 6 AM CST Wednesday.

* IMPACTS...Power outages and tree damage are likely due to the 
  ice. Travel could be nearly impossible. The hazardous 
  conditions could impact the evening commute.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Slow down and use caution while traveling. 

The latest road conditions for the state you are calling from can
be obtained by calling 5 1 1.

&&

$$

KSZ057-103>105-MOZ021-028-029-037-043-291745-
/O.CON.KEAX.WW.Y.0018.201229T1200Z-201230T0000Z/
Miami-Leavenworth-Wyandotte-Johnson KS-Clinton-Platte-Clay-
Jackson-Cass-
Including the cities of Paola, Osawatomie, Louisburg, 
Fort Leavenworth, Leavenworth, Lansing, Kansas City Kansas, 
Overland Park, Stanley, Olathe, Shawnee, Lenexa, Cameron, 
Plattsburg, Lathrop, Parkville, Platte City, Riverside, 
Weatherby Lake, Weston, Gladstone, Liberty, Excelsior Springs, 
Kansas City, Independence, Belton, Raymore, Harrisonville, 
and Pleasant Hill
332 AM CST Tue Dec 29 2020

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 6 PM CST THIS
EVENING...

* WHAT...Mixed precipitation expected. Total snow accumulations 
  of up to two inches and ice accumulations of up to 0.15 of an 
  inch.

* WHERE...Portions of east central and northeast Kansas and 
  northwest and west central Missouri.

* WHEN...From 6 AM to 6 PM CST Tuesday.

* IMPACTS...Plan on slippery road conditions. The hazardous 
  conditions could impact the morning or evening commute.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Slow down and use caution while traveling. 

The latest road conditions for the state you are calling from can
be obtained by calling 5 1 1.

&&

$$

MOZ022>025-030>032-038-039-291745-
/O.CON.KEAX.WW.Y.0018.201229T1500Z-201230T0000Z/
Caldwell-Livingston-Linn MO-Macon-Ray-Carroll-Chariton-Lafayette-
Saline-
Including the cities of Hamilton, Braymer, Polo, Breckenridge, 
Chillicothe, Brookfield, Marceline, Macon, La Plata, Richmond, 
Lawson, Carrollton, Salisbury, Brunswick, Keytesville, Odessa, 
Higginsville, Lexington, Concordia, and Marshall
332 AM CST Tue Dec 29 2020

...WINTER WEATHER ADVISORY REMAINS IN EFFECT FROM 9 AM THIS
MORNING TO 6 PM CST THIS EVENING...

* WHAT...Mixed precipitation expected. Total snow accumulations 
  of 1-2 inches and ice accumulations of 0.15-0.25 of an inch.

* WHERE...Portions of central, north central and west central 
  Missouri.

* WHEN...From 9 AM to 6 PM CST Tuesday.

* IMPACTS...Plan on slippery road conditions. The hazardous 
  conditions could impact the evening commute.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Slow down and use caution while traveling. 

The latest road conditions for the state you are calling from can
be obtained by calling 5 1 1.

&&

$$
5 follow-up statements
425 
WWUS43 KEAX 291751
WSWEAX

URGENT - WINTER WEATHER MESSAGE
National Weather Service Kansas City/Pleasant Hill MO
1151 AM CST Tue Dec 29 2020

...Wintry precipitation is expected to impact the region Tuesday
morning through Wednesday morning...

KSZ025-102-MOZ001>007-011>016-020-300200-
/O.CON.KEAX.WS.W.0004.000000T0000Z-201230T1200Z/
Atchison KS-Doniphan-Atchison MO-Nodaway-Worth-Gentry-Harrison-
Mercer-Putnam-Holt-Andrew-De Kalb-Daviess-Grundy-Sullivan-
Buchanan-
Including the cities of Atchison, Wathena, Elwood, Troy, 
Highland, Tarkio, Rockport, Fairfax, Maryville, Grant City, 
Albany, Stanberry, King City, Bethany, Princeton, Mercer, 
Unionville, Mound City, Oregon, Maitland, Forest City, Craig, 
Savannah, Country Club Villa, Maysville, Stewartsville, Osborn, 
Union Star, Clarksdale, Gallatin, Jamesport, Trenton, Milan, 
Green City, St. Joseph Airport, and St. Joseph
1151 AM CST Tue Dec 29 2020

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 6 AM CST
WEDNESDAY...

* WHAT...Heavy mixed precipitation. Additional snow 
  accumulations of up to 3 inches and ice accumulations of 
  around three tenths of an inch. Winds gusting as high as 35 
  mph.

* WHERE...Portions of northeast Kansas and north central and 
  northwest Missouri.

* WHEN...Until 6 AM CST Wednesday.

* IMPACTS...Power outages and tree damage are likely due to the 
  ice. Travel could be nearly impossible. The hazardous 
  conditions could impact the evening commute.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If you must travel, keep an extra flashlight, food, and water in
your vehicle in case of an emergency. 

The latest road conditions for the state you are calling from can
be obtained by calling 5 1 1.

&&

$$

KSZ057-103>105-MOZ021-028-029-037-043-300000-
/O.CON.KEAX.WW.Y.0018.000000T0000Z-201230T0000Z/
Miami-Leavenworth-Wyandotte-Johnson KS-Clinton-Platte-Clay-
Jackson-Cass-
Including the cities of Paola, Osawatomie, Louisburg, 
Fort Leavenworth, Leavenworth, Lansing, Kansas City Kansas, 
Overland Park, Stanley, Olathe, Shawnee, Lenexa, Cameron, 
Plattsburg, Lathrop, Parkville, Platte City, Riverside, 
Weatherby Lake, Weston, Gladstone, Liberty, Excelsior Springs, 
Kansas City, Independence, Belton, Raymore, Harrisonville, 
and Pleasant Hill
1151 AM CST Tue Dec 29 2020

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 6 PM CST THIS
EVENING...

* WHAT...Freezing rain. Additional ice accumulations of around 
  two tenths of an inch.

* WHERE...Portions of east central and northeast Kansas and 
  northwest and west central Missouri.

* WHEN...Until 6 PM CST this evening.

* IMPACTS...Difficult travel conditions are possible. The 
  hazardous conditions could impact the evening commute.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Slow down and use caution while traveling. Prepare for possible
power outages. 

The latest road conditions for the state you are calling from can
be obtained by calling 5 1 1.

&&

$$

MOZ008-017-300200-
/O.CON.KEAX.WW.Y.0018.000000T0000Z-201230T1200Z/
Schuyler-Adair-
Including the cities of Lancaster, Queen City, Greentop, Downing,
Glenwood, and Kirksville
1151 AM CST Tue Dec 29 2020

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 6 AM CST
WEDNESDAY...

* WHAT...Mixed precipitation. Additional snow accumulations of 
  up to two inches and ice accumulations of one tenth to one 
  quarter of an inch.

* WHERE...Adair and Schuyler Counties.

* WHEN...Until 6 AM CST Wednesday.

* IMPACTS...Power outages and tree damage are likely due to the 
  ice. Travel could be nearly impossible. The hazardous 
  conditions could impact the evening commute.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Slow down and use caution while traveling. 

The latest road conditions for the state you are calling from can
be obtained by calling 5 1 1.

&&

$$

MOZ022>025-030>032-038-039-300000-
/O.CON.KEAX.WW.Y.0018.000000T0000Z-201230T0000Z/
Caldwell-Livingston-Linn MO-Macon-Ray-Carroll-Chariton-Lafayette-
Saline-
Including the cities of Hamilton, Braymer, Polo, Breckenridge, 
Chillicothe, Brookfield, Marceline, Macon, La Plata, Richmond, 
Lawson, Carrollton, Salisbury, Brunswick, Keytesville, Odessa, 
Higginsville, Lexington, Concordia, and Marshall
1151 AM CST Tue Dec 29 2020

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 6 PM CST THIS
EVENING...

* WHAT...Mixed precipitation. Additional snow accumulations of 
  up to one inch and ice accumulations of up to two tenths of an 
  inch.

* WHERE...Portions of central, north central and west central 
  Missouri.

* WHEN...Until 6 PM CST this evening.

* IMPACTS...Plan on slippery road conditions. The hazardous 
  conditions could impact the evening commute.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Slow down and use caution while traveling. 

The latest road conditions for the state you are calling from can
be obtained by calling 5 1 1.

&&

$$
429 
WWUS43 KEAX 291918
WSWEAX

URGENT - WINTER WEATHER MESSAGE
National Weather Service Kansas City/Pleasant Hill MO
118 PM CST Tue Dec 29 2020


KSZ057-105-MOZ037>039-043-292030-
/O.CAN.KEAX.WW.Y.0018.000000T0000Z-201230T0000Z/
Miami-Johnson KS-Jackson-Lafayette-Saline-Cass-
Including the cities of Paola, Osawatomie, Louisburg, 
Overland Park, Stanley, Olathe, Shawnee, Lenexa, Kansas City, 
Independence, Odessa, Higginsville, Lexington, Concordia, 
Marshall, Belton, Raymore, Harrisonville, and Pleasant Hill
118 PM CST Tue Dec 29 2020

...WINTER WEATHER ADVISORY IS CANCELLED...

Winter weather concerns have diminished south of the MO River due
to a break in precipitation and temperatures around freezing. Any
additional precipitation seen later today should be in the form 
of rain.


$$

KSZ025-102-MOZ001>007-011>016-020-300330-
/O.CON.KEAX.WS.W.0004.000000T0000Z-201230T1200Z/
Atchison KS-Doniphan-Atchison MO-Nodaway-Worth-Gentry-Harrison-
Mercer-Putnam-Holt-Andrew-De Kalb-Daviess-Grundy-Sullivan-
Buchanan-
Including the cities of Atchison, Wathena, Elwood, Troy, 
Highland, Tarkio, Rockport, Fairfax, Maryville, Grant City, 
Albany, Stanberry, King City, Bethany, Princeton, Mercer, 
Unionville, Mound City, Oregon, Maitland, Forest City, Craig, 
Savannah, Country Club Villa, Maysville, Stewartsville, Osborn, 
Union Star, Clarksdale, Gallatin, Jamesport, Trenton, Milan, 
Green City, St. Joseph Airport, and St. Joseph
118 PM CST Tue Dec 29 2020

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 6 AM CST
WEDNESDAY...

* WHAT...Heavy mixed precipitation. Additional snow 
  accumulations of up to two inches and ice accumulations of 
  around three tenths of an inch. Winds gusting as high as 35 
  mph.

* WHERE...Portions of northeast Kansas and north central and 
  northwest Missouri.

* WHEN...Until 6 AM CST Wednesday.

* IMPACTS...Power outages and tree damage are likely due to the 
  ice. Travel could be nearly impossible. The hazardous 
  conditions could impact the evening commute.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If you must travel, keep an extra flashlight, food, and water in
your vehicle in case of an emergency. 

The latest road conditions for the state you are calling from can
be obtained by calling 5 1 1.

&&

$$

KSZ103-104-MOZ021-028-029-300000-
/O.CON.KEAX.WW.Y.0018.000000T0000Z-201230T0000Z/
Leavenworth-Wyandotte-Clinton-Platte-Clay-
Including the cities of Fort Leavenworth, Leavenworth, Lansing, 
Kansas City Kansas, Cameron, Plattsburg, Lathrop, Parkville, 
Platte City, Riverside, Weatherby Lake, Weston, Gladstone, 
Liberty, and Excelsior Springs
118 PM CST Tue Dec 29 2020

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 6 PM CST THIS
EVENING...

* WHAT...Mixed precipitation. Additional snow accumulations of 
  up to one inch and ice accumulations of up to two tenths of an 
  inch.

* WHERE...In Kansas, Leavenworth and Wyandotte Counties. In 
  Missouri, Clinton, Platte and Clay Counties.

* WHEN...Until 6 PM CST this evening.

* IMPACTS...Plan on slippery road conditions. The hazardous 
  conditions could impact the evening commute.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Slow down and use caution while traveling. 

The latest road conditions for the state you are calling from can
be obtained by calling 5 1 1.

&&

$$

MOZ008-017-300330-
/O.CON.KEAX.WW.Y.0018.000000T0000Z-201230T1200Z/
Schuyler-Adair-
Including the cities of Lancaster, Queen City, Greentop, Downing,
Glenwood, and Kirksville
118 PM CST Tue Dec 29 2020

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 6 AM CST
WEDNESDAY...

* WHAT...Mixed precipitation. Additional snow accumulations of 
  up to two inches and ice accumulations of one tenth to one 
  quarter of an inch.

* WHERE...Adair and Schuyler Counties.

* WHEN...Until 6 AM CST Wednesday.

* IMPACTS...Plan on slippery road conditions. The hazardous 
  conditions could impact the evening commute.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Slow down and use caution while traveling. 

The latest road conditions for the state you are calling from can
be obtained by calling 5 1 1.

&&

$$

MOZ022>025-030>032-300000-
/O.CON.KEAX.WW.Y.0018.000000T0000Z-201230T0000Z/
Caldwell-Livingston-Linn MO-Macon-Ray-Carroll-Chariton-
Including the cities of Hamilton, Braymer, Polo, Breckenridge, 
Chillicothe, Brookfield, Marceline, Macon, La Plata, Richmond, 
Lawson, Carrollton, Salisbury, Brunswick, and Keytesville
118 PM CST Tue Dec 29 2020

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 6 PM CST THIS
EVENING...

* WHAT...Mixed precipitation. Additional snow accumulations of 
  up to one inch and ice accumulations of up to two tenths of an 
  inch.

* WHERE...Portions of north central and west central Missouri.

* WHEN...Until 6 PM CST this evening.

* IMPACTS...Plan on slippery road conditions. The hazardous 
  conditions could impact the evening commute.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Slow down and use caution while traveling. 

The latest road conditions for the state you are calling from can
be obtained by calling 5 1 1.

&&

$$
580 
WWUS43 KEAX 292016
WSWEAX

URGENT - WINTER WEATHER MESSAGE
National Weather Service Kansas City/Pleasant Hill MO
216 PM CST Tue Dec 29 2020


KSZ103-104-MOZ028>032-292130-
/O.CAN.KEAX.WW.Y.0018.000000T0000Z-201230T0000Z/
Leavenworth-Wyandotte-Platte-Clay-Ray-Carroll-Chariton-
Including the cities of Fort Leavenworth, Leavenworth, Lansing, 
Kansas City Kansas, Parkville, Platte City, Riverside, 
Weatherby Lake, Weston, Gladstone, Liberty, Excelsior Springs, 
Richmond, Lawson, Carrollton, Salisbury, Brunswick, 
and Keytesville
216 PM CST Tue Dec 29 2020

...WINTER WEATHER ADVISORY IS CANCELLED...

Winter weather concerns have diminished along and south of the MO
River due to a break in precipitation and temperatures at or above 
freezing. Any additional precipitation seen later today and
tonight should be in the form of rain.

$$

KSZ025-102-MOZ001>007-011>016-020-301200-
/O.CON.KEAX.WS.W.0004.000000T0000Z-201230T1200Z/
Atchison KS-Doniphan-Atchison MO-Nodaway-Worth-Gentry-Harrison-
Mercer-Putnam-Holt-Andrew-De Kalb-Daviess-Grundy-Sullivan-
Buchanan-
Including the cities of Atchison, Wathena, Elwood, Troy, 
Highland, Tarkio, Rockport, Fairfax, Maryville, Grant City, 
Albany, Stanberry, King City, Bethany, Princeton, Mercer, 
Unionville, Mound City, Oregon, Maitland, Forest City, Craig, 
Savannah, Country Club Villa, Maysville, Stewartsville, Osborn, 
Union Star, Clarksdale, Gallatin, Jamesport, Trenton, Milan, 
Green City, St. Joseph Airport, and St. Joseph
216 PM CST Tue Dec 29 2020

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 6 AM CST
WEDNESDAY...

* WHAT...Heavy mixed precipitation. Additional snow 
  accumulations of up to two inches and ice accumulations of one 
  tenth to three tenths of an inch.

* WHERE...Portions of northeast Kansas and north central and 
  northwest Missouri.

* WHEN...Until 6 AM CST Wednesday.

* IMPACTS...Power outages and tree damage are likely due to the 
  ice. Travel could be nearly impossible. The hazardous 
  conditions could impact the evening commute.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If you must travel, keep an extra flashlight, food, and water in
your vehicle in case of an emergency. 

The latest road conditions for the state you are calling from can
be obtained by calling 5 1 1.

&&

$$

MOZ021-300000-
/O.CON.KEAX.WW.Y.0018.000000T0000Z-201230T0000Z/
Clinton-
Including the cities of Cameron, Plattsburg, and Lathrop
216 PM CST Tue Dec 29 2020

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 6 PM CST THIS
EVENING...

* WHAT...Mixed precipitation. Additional ice accumulations of one
  tenth to two tenths of an inch.

* WHERE...Clinton County.

* WHEN...Until 6 PM CST this evening.

* IMPACTS...Plan on slippery road conditions. The hazardous 
  conditions could impact the evening commute.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Slow down and use caution while traveling. 

The latest road conditions for the state you are calling from can
be obtained by calling 5 1 1.

&&

$$

MOZ008-017-301200-
/O.CON.KEAX.WW.Y.0018.000000T0000Z-201230T1200Z/
Schuyler-Adair-
Including the cities of Lancaster, Queen City, Greentop, Downing,
Glenwood, and Kirksville
216 PM CST Tue Dec 29 2020

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 6 AM CST
WEDNESDAY...

* WHAT...Mixed precipitation. Additional snow accumulations of up
  to half an inch and ice accumulations of two tenths to three 
  tenths of an inch.

* WHERE...Adair and Schuyler Counties.

* WHEN...Until 6 AM CST Wednesday.

* IMPACTS...Power outages and tree damage are likely due to the 
  ice. Travel could be nearly impossible. The hazardous 
  conditions could impact the evening commute.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Slow down and use caution while traveling. 

The latest road conditions for the state you are calling from can
be obtained by calling 5 1 1.

&&

$$

MOZ022>025-300000-
/O.CON.KEAX.WW.Y.0018.000000T0000Z-201230T0000Z/
Caldwell-Livingston-Linn MO-Macon-
Including the cities of Hamilton, Braymer, Polo, Breckenridge, 
Chillicothe, Brookfield, Marceline, Macon, and La Plata
216 PM CST Tue Dec 29 2020

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 6 PM CST THIS
EVENING...

* WHAT...Mixed precipitation. Additional ice accumulations of up 
  to one tenth of an inch.

* WHERE...Linn MO, Macon, Caldwell and Livingston Counties.

* WHEN...Until 6 PM CST this evening.

* IMPACTS...Plan on slippery road conditions. The hazardous 
  conditions could impact the evening commute.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Slow down and use caution while traveling. 

The latest road conditions for the state you are calling from can
be obtained by calling 5 1 1.

&&

$$
056 
WWUS43 KEAX 300303
WSWEAX

URGENT - WINTER WEATHER MESSAGE
National Weather Service Kansas City/Pleasant Hill MO
903 PM CST Tue Dec 29 2020

KSZ025-102-MOZ001-002-011-012-020-300415-
/O.CAN.KEAX.WS.W.0004.000000T0000Z-201230T1200Z/
Atchison KS-Doniphan-Atchison MO-Nodaway-Holt-Andrew-Buchanan-
Including the cities of Atchison, Wathena, Elwood, Troy, 
Highland, Tarkio, Rockport, Fairfax, Maryville, Mound City, 
Oregon, Maitland, Forest City, Craig, Savannah, 
Country Club Villa, St. Joseph Airport, and St. Joseph
903 PM CST Tue Dec 29 2020

...WINTER STORM WARNING IS CANCELLED...

Impactful winter weather has moved out of the area. Light wintry
mix may linger for the next few hours. Road conditions may still
be hazardous so use caution while traveling. 

$$

MOZ003>007-013>016-301115-
/O.CON.KEAX.WS.W.0004.000000T0000Z-201230T1200Z/
Worth-Gentry-Harrison-Mercer-Putnam-De Kalb-Daviess-Grundy-
Sullivan-
Including the cities of Grant City, Albany, Stanberry, King City,
Bethany, Princeton, Mercer, Unionville, Maysville, Stewartsville,
Osborn, Union Star, Clarksdale, Gallatin, Jamesport, Trenton, 
Milan, and Green City
903 PM CST Tue Dec 29 2020

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 6 AM CST
WEDNESDAY...

* WHAT...Heavy mixed precipitation. Additional snow 
  accumulations of up to one inch and ice accumulations of up to 
  one tenth of an inch.

* WHERE...Portions of north central and northwest Missouri.

* WHEN...Until 6 AM CST Wednesday.

* IMPACTS...Plan on slippery road conditions.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If you must travel, keep an extra flashlight, food, and water in
your vehicle in case of an emergency.

The latest road conditions for the state you are calling from can
be obtained by calling 5 1 1.

&&

$$

MOZ008-017-301115-
/O.CON.KEAX.WW.Y.0018.000000T0000Z-201230T1200Z/
Schuyler-Adair-
Including the cities of Lancaster, Queen City, Greentop, Downing,
Glenwood, and Kirksville
903 PM CST Tue Dec 29 2020

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 6 AM CST
WEDNESDAY...

* WHAT...Freezing rain. Additional ice accumulations of one 
  tenth to two tenths of an inch.

* WHERE...Schuyler and Adair Counties.

* WHEN...Until 6 AM CST Wednesday.

* IMPACTS...Difficult travel conditions are possible.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Slow down and use caution while traveling.

The latest road conditions for the state you are calling from can
be obtained by calling 5 1 1.

&&

$$
518 
WWUS43 KEAX 300941
WSWEAX

URGENT - WINTER WEATHER MESSAGE
National Weather Service Kansas City/Pleasant Hill MO
341 AM CST Wed Dec 30 2020

MOZ013>016-302145-
/O.CAN.KEAX.WS.W.0004.000000T0000Z-201230T1200Z/
/O.NEW.KEAX.WS.A.0004.210101T0300Z-210102T0000Z/
De Kalb-Daviess-Grundy-Sullivan-
Including the cities of Maysville, Stewartsville, Osborn, 
Union Star, Clarksdale, Gallatin, Jamesport, Trenton, Milan, 
and Green City
341 AM CST Wed Dec 30 2020

...WINTER STORM WATCH IN EFFECT FROM THURSDAY EVENING THROUGH
FRIDAY AFTERNOON...
...WINTER STORM WARNING IS CANCELLED...

* WHAT...Heavy mixed precipitation possible. Total snow 
  accumulations of 1 to 3 inches and ice accumulations of up to 
  one tenth of an inch possible.

* WHERE...De Kalb, Daviess, Grundy and Sullivan Counties.

* WHEN...From Thursday evening through Friday afternoon.

* IMPACTS...Plan on slippery road conditions. The hazardous 
  conditions could impact the morning or evening commute.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Monitor the latest forecasts for updates on this situation. 

&&

$$

MOZ003>007-301045-
/O.CAN.KEAX.WS.W.0004.000000T0000Z-201230T1200Z/
Worth-Gentry-Harrison-Mercer-Putnam-
Including the cities of Grant City, Albany, Stanberry, King City,
Bethany, Princeton, Mercer, and Unionville
341 AM CST Wed Dec 30 2020

...WINTER STORM WARNING IS CANCELLED...

Precipitation has ended across the area, therefore, the winter
storm warning is cancelled.

$$

MOZ017-302145-
/O.CAN.KEAX.WW.Y.0018.000000T0000Z-201230T1200Z/
/O.NEW.KEAX.WS.A.0004.210101T0300Z-210102T0000Z/
Adair-
Including the city of Kirksville
341 AM CST Wed Dec 30 2020

...WINTER STORM WATCH IN EFFECT FROM THURSDAY EVENING THROUGH
FRIDAY AFTERNOON...
...WINTER WEATHER ADVISORY IS CANCELLED...

* WHAT...Heavy mixed precipitation possible. Total snow 
  accumulations of up to two inches and ice accumulations of one 
  tenth to two tenths of an inch possible.

* WHERE...Adair County.

* WHEN...From Thursday evening through Friday afternoon.

* IMPACTS...Plan on slippery road conditions. The hazardous 
  conditions could impact the morning or evening commute.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Monitor the latest forecasts for updates on this situation. 

&&

$$

MOZ008-301045-
/O.CAN.KEAX.WW.Y.0018.000000T0000Z-201230T1200Z/
Schuyler-
Including the cities of Lancaster, Queen City, Greentop, Downing,
and Glenwood
341 AM CST Wed Dec 30 2020

...WINTER WEATHER ADVISORY IS CANCELLED...

Precipitation has ended across the area, therefore, the winter
storm warning is cancelled.

$$

KSZ025-057-060-103>105-MOZ020>025-028>033-037>040-043>046-053-054-
302145-
/O.NEW.KEAX.WS.A.0004.210101T0300Z-210102T0000Z/
Atchison KS-Miami-Linn KS-Leavenworth-Wyandotte-Johnson KS-
Buchanan-Clinton-Caldwell-Livingston-Linn MO-Macon-Platte-Clay-
Ray-Carroll-Chariton-Randolph-Jackson-Lafayette-Saline-Howard-
Cass-Johnson MO-Pettis-Cooper-Bates-Henry-
Including the cities of Atchison, Paola, Osawatomie, Louisburg, 
Pleasanton, La Cygne, Mound City, Fort Leavenworth, Leavenworth, 
Lansing, Kansas City Kansas, Overland Park, Stanley, Olathe, 
Shawnee, Lenexa, St. Joseph Airport, St. Joseph, Cameron, 
Plattsburg, Lathrop, Hamilton, Braymer, Polo, Breckenridge, 
Chillicothe, Brookfield, Marceline, Macon, La Plata, Parkville, 
Platte City, Riverside, Weatherby Lake, Weston, Gladstone, 
Liberty, Excelsior Springs, Richmond, Lawson, Carrollton, 
Salisbury, Brunswick, Keytesville, Moberly, Kansas City, 
Independence, Odessa, Higginsville, Lexington, Concordia, 
Marshall, Fayette, Glasgow, New Franklin, Belton, Raymore, 
Harrisonville, Pleasant Hill, Warrensburg, Sedalia, Boonville, 
Butler, Adrian, Rich Hill, Clinton, and Windsor
341 AM CST Wed Dec 30 2020

...WINTER STORM WATCH IN EFFECT FROM THURSDAY EVENING THROUGH
FRIDAY AFTERNOON...

* WHAT...Heavy mixed precipitation possible. Total snow 
  accumulations of 1 to 3 inches and ice accumulations of one 
  tenth to three tenths of an inch possible.

* WHERE...Portions of east central and northeast Kansas and 
  central, north central, northwest and west central Missouri.

* WHEN...From Thursday evening through Friday afternoon.

* IMPACTS...Power outages and tree damage are likely due to the 
  ice. Travel could be nearly impossible. The hazardous 
  conditions could impact the morning or evening commute.


PRECAUTIONARY/PREPAREDNESS ACTIONS...

Monitor the latest forecasts for updates on this situation. 

&&

$$

What forecasters said that day

The local office's own words before this winter storm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Kansas City, MO wrote its last area forecast discussion before this winter storm warning went out at Dec 28, 11:02 PM CST, 4 hours 30 minutes earlier.

Area forecast discussion, Dec 28, 11:02 PM CST, 4 hours 30 minutes before
AREA FORECAST DISCUSSION
National Weather Service Kansas City/Pleasant Hill MO
1102 PM CST Mon Dec 28 2020

.Discussion...
Issued at 424 PM CST MON DEC 28 2020

Message of the Day: Winter weather returns Tuesday across the entire
area, especially for those along the MO/KS border and along/north of
the MO River. Wintry mix is expected initially with a transition to
rain (south to north) Tuesday afternoon into overnight hours.
Precipitation will end Wednesday morning, with rain potentially
changing back to light wintry mix as the system exits our region.
Ice accumulations up to 0.15 of an inch is expected across most
of the area, with up to 0.25 of an inch north of HWY 36. Snow
accumulations of around 1-2 inches are expected for most of the
area, with 2-4 inches of snow expected north of a line from St.
Joseph to Kirksville. Roads will be slick, so caution needs to be
taken tomorrow if going out on the roads.

High pressure has kept the weather quiet today, with temperatures
staying in the 30s. The pattern changes tonight as low pressure
starts approaching the area.

Precipitation will move into the area from the west-southwest
tomorrow morning. Generally speaking, we expect snow, then a wintry
mix of freezing rain and sleet, then a transition to rain Tuesday
evening. Precip will first start along the MO/KS border. We could
see some flurries or light snow as early as 4 AM for this area, but
it doesn't look like we will overcome the dry low level air until
later in the morning. So, really don't expect to see anything
reach the ground until closer to the 7-9 AM time frame. Snow is
possible for a brief time initially in these areas, but it should
quickly change to a wintry mix of freezing rain and some sleet.
The wintry precipitation will then gradually spread north and east
through the rest of the morning Tuesday. Warm surface air is then
expected to move into the area from south to north, changing the
precipitation over to rain. Our far southern counties will
changeover to rain in the late morning, with areas along I-70
changing over to rain between 1-3 PM, and those along HWY 36
changing over to rain between 4-7 PM. Areas north of HWY 36,
should changeover to rain by midnight. Right now expect ice
accumulations up to 0.15 of an inch across most of the area, with
up to 0.25 of an inch expected along and north of HWY 36. As for
snow accumulations, around 1-2 inches is expected across most of
the area, with 2-4 inches of snow expected north of a St. Joseph
to Kirksville line. A winter weather advisory is in effect for
most of the area during the day and overnight hours Tuesday.
Hazardous travel is expected during the winter weather, so take
caution if going out on the roads. The precipitation will
gradually move southeast Wednesday morning. It should be mostly
rain as it exits the area, but cold air moving in behind the
system could result in a brief changeover to a wintry mix. Very
little, if any, wintry accumulations are expected Wednesday.

One thing to keep in mind with this Tuesday/Wednesday system is
there is still some uncertainty with surface temperatures. If the
warmer air is slower to arrive, then the wintry mix will stick
around longer, increasing wintry accumulations. If the warmer air is
quicker to arrive, then the changeover to rain will occur sooner,
limiting the wintry accumulations. Surface temperatures will be
closely monitored.

Eyes then turn to a second winter storm system expected to move
through New Year's Eve night into New Year's Day. Right now, our
area is in the favorable area for snow and wintry mix. There is
still uncertainty regarding storm track though. It won't take a big
shift in the track to see a big change in precipitation types so
make sure to keep checking back for updates. With that said, at this
time it looks likely we will bring in the new year with accumulating
snow and ice.

&&

.Aviation...(For the 06Z TAFS through 06Z Tuesday Night)
Issued at 1056 PM CST MON DEC 28 2020

Still looking at incoming precipitation eventually making it to
the terminals about as previously advertised, roughly around
sunrise. Initially precipitation will be snow or ice, then
transitioning to ice/freezing rain and sleet through the late
morning and early afternoon. By late afternoon enough warm air
should be moving in to get rain to stay melted on surfaces. In the
meantime through Tuesday morning and early afternoon surfaces will
be very slick. Low level wind shear is also on track to form above
the terminals with very strong low level winds.

&&

.EAX WATCHES/WARNINGS/ADVISORIES...
KS...Winter Weather Advisory from 6 AM to 6 PM CST Tuesday for KSZ025-
     057-102>105.

MO...Winter Weather Advisory from 9 AM to 6 PM CST Tuesday for
     MOZ022>025-030>032-038-039.

     Winter Weather Advisory from 6 AM to 6 PM CST Tuesday for MOZ020-
     021-028-029-037-043.

     Winter Weather Advisory from noon Tuesday to 6 AM CST Wednesday
     for MOZ005>008-014>017.

     Winter Weather Advisory from 6 AM Tuesday to 6 AM CST Wednesday
     for MOZ001>004-011>013.

&&

Discussion...Atkins
Aviation...Leighton
Hazardous weather outlook, Dec 28, 5:14 AM CST, 22 hours 18 minutes before
Hazardous Weather Outlook
National Weather Service Kansas City/Pleasant Hill MO
514 AM CST Mon Dec 28 2020

MOZ022>025-030>033-038>040-044>046-054-291115-
Caldwell-Livingston-Linn MO-Macon-Ray-Carroll-Chariton-Randolph-
Lafayette-Saline-Howard-Johnson MO-Pettis-Cooper-Henry-
514 AM CST Mon Dec 28 2020

This hazardous weather outlook is for northwest...north central and
west central Missouri...as well as extreme eastern Kansas.

.DAY ONE...Today and Tonight

 No hazardous weather is expected at this time.

.DAYS TWO THROUGH SEVEN...Tuesday through Sunday

Rain and freezing rain is expected to develop Tuesday morning,
possibly creating slick conditions for a time during the daylight
hours on Tuesday. As surface temperatures warm above freezing, the
threat for freezing rain will come to an end.

A second winter weather system is possible on New Years Day. At this
time, the track of this system is uncertain. Continue to monitor the
forecast for additional information.

 More detailed information can be accessed at...
 https://www.weather.gov/eax/hwo

KSZ025-057-060-103>105-MOZ021-028-029-037-043-053-291115-
Atchison KS-Miami-Linn KS-Leavenworth-Wyandotte-Johnson KS-Clinton-
Platte-Clay-Jackson-Cass-Bates-
514 AM CST Mon Dec 28 2020

This hazardous weather outlook is for northwest...north central and
west central Missouri...as well as extreme eastern Kansas.

.DAY ONE...Today and Tonight

 No hazardous weather is expected at this time.

.DAYS TWO THROUGH SEVEN...Tuesday through Sunday

Freezing rain is expected to develop Tuesday morning, creating slick
conditions. As surface temperatures warm above freezing Tuesday
afternoon, precipitation is expected to transition to rain.

A second winter weather system is possible on New Years Day. At this
time, the track of this system is uncertain. Continue to monitor the
forecast for additional information.

 More detailed information can be accessed at...
 https://www.weather.gov/eax/hwo

KSZ102-MOZ001>008-011>017-020-291115-
Doniphan-Atchison MO-Nodaway-Worth-Gentry-Harrison-Mercer-Putnam-
Schuyler-Holt-Andrew-De Kalb-Daviess-Grundy-Sullivan-Adair-Buchanan-
514 AM CST Mon Dec 28 2020

This hazardous weather outlook is for northwest...north central and
west central Missouri...as well as extreme eastern Kansas.

.DAY ONE...Today and Tonight

 No hazardous weather is expected at this time.

.DAYS TWO THROUGH SEVEN...Tuesday through Sunday

A wintry mix of freezing rain and snow is expected Tuesday into
Wednesday morning creating difficult travel conditions. Snowfall
amounts of 2-4 inches are expected, with heaviest amounts across far
northwest Missouri. Icing amounts could approach a quarter of an
inch.

 More detailed information can be accessed at...
 https://www.weather.gov/eax/hwo

Nearby

Winter Storm Warnings in Missouri, 2020Winter Storm Warnings in Kansas, 2020Every winter storm warning in 2020

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.