Alert archive / Iowa / Winter Storm Warnings in 2021
Winter Storm Warning 3, NWS Omaha, NE
NWS Omaha, NE issued this winter storm warning at Feb 21, 2021, 8:42 AM CST for 5 counties in Iowa; 4 counties in Nebraska. It was in force for 7 hr. 48 reports came from inside the area while it was in force.
The area
The counties it named, with what was reported inside it.
The facts
- Issued
- Feb 21, 2021, 8:42 AM CST (14:42 UTC)
- Expired
- Feb 21, 2021, 3:45 PM CST
- In force
- 7 hr
- Issued by
- NWS Omaha, NE
Counties Harrison County, IA, Mills County, IA, Monona County, IA, Pottawattamie County, IA, Shelby County, IA, Burt County, NE, Douglas County, NE, Sarpy County, NE, Washington County, NE
The radar
The Omaha radar (KOAX), 44 km from the middle of the area, began a volume at 14:44 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.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Feb 21, 9:12 AM CST | SNOW 4 | 2 W Offutt Afb, NE | |
| Feb 21, 9:30 AM CST | HEAVY SNOW 6 | 11 N Tekamah, NE | PUBLIC REPORT OF 6.0 INCHES OF SNOW. |
| Feb 21, 9:46 AM CST | HEAVY SNOW 3.4 | 4 N Gretna, NE | NWS EMPLOYEE REPORTS OF 3.4 INCHES OF SNOW. |
| Feb 21, 9:59 AM CST | SNOW 5 | 3 E Omaha, NE | |
| Feb 21, 10:00 AM CST | HEAVY SNOW 5 | Papillion, NE | PUBLIC REPORT OF 5.0 INCHES OF SNOW. |
| Feb 21, 10:20 AM CST | HEAVY SNOW 6 | 2 Se Bellevue, NE | PUBLIC REPORT OF 6.0 INCHES OF SNOW. |
| Feb 21, 10:30 AM CST | HEAVY SNOW 4 | 1 E Arlington, NE | PUBLIC REPORT OF 4.0 INCHES OF SNOW. |
| Feb 21, 10:30 AM CST | HEAVY SNOW 5.5 | 5 Ese Omaha, NE | PUBLIC REPORT OF 5.5 INCHES OF SNOW. |
| Feb 21, 10:30 AM CST | HEAVY SNOW 7 | 1 S La Vista, NE | PUBLIC REPORT OF 7.0 INCHES OF SNOW. |
| Feb 21, 10:35 AM CST | HEAVY SNOW 6.5 | 1 Wsw Omaha, NE | MEDIA REPORT OF 6.5 INCHES OF SNOW. |
| Feb 21, 10:45 AM CST | HEAVY SNOW 6.5 | 1 Se Omaha, NE | PUBLIC REPORT OF 6.5 INCHES OF SNOW. |
| Feb 21, 10:45 AM CST | HEAVY SNOW 6.5 | Ralston, NE | PUBLIC REPORT OF 6.5 INCHES OF SNOW. |
| Feb 21, 10:50 AM CST | HEAVY SNOW 7 | 1 Ene Underwood, IA | PUBLIC REPORT OF 7.0 INCHES OF SNOW. |
| Feb 21, 10:50 AM CST | HEAVY SNOW 8 | Bellevue, NE | PUBLIC REPORT OF 8.0 INCHES OF SNOW. |
| Feb 21, 10:53 AM CST | HEAVY SNOW 4 | 2 S Bennington, NE | PUBLIC REPORT OF 4.0 INCHES OF SNOW. |
| Feb 21, 11:00 AM CST | HEAVY SNOW 4 | Bennington, NE | PUBLIC REPORT OF 4.0 INCHES OF SNOW. |
| Feb 21, 11:03 AM CST | SNOW 6 | 2 W Offutt Afb, NE | |
| Feb 21, 11:15 AM CST | HEAVY SNOW 7 | 1 Nne Council Bluffs, IA | PUBLIC REPORT OF 7.0 INCHES OF SNOW. |
| Feb 21, 11:15 AM CST | HEAVY SNOW 7 | Minden, IA | PUBLIC REPORT OF 7.0 INCHES OF SNOW. |
| Feb 21, 11:15 AM CST | HEAVY SNOW 8.5 | Woodbine, IA | PUBLIC REPORT OF 8.5 INCHES OF SNOW. |
| Feb 21, 11:20 AM CST | HEAVY SNOW 6.5 | 2 S Oakland, NE | |
| Feb 21, 11:30 AM CST | HEAVY SNOW 7 | 3 S Tekamah, NE | PUBLIC REPORT OF 7.0 INCHES OF SNOW. |
| Feb 21, 11:40 AM CST | HEAVY SNOW 4.5 | 1 Ene Elkhorn, NE | PUBLIC REPORT OF 4.75 INCHES OF SNOW. |
| Feb 21, 11:40 AM CST | HEAVY SNOW 7 | 1 Ssw Papillion, NE | PUBLIC REPORT OF 7.0 INCHES OF SNOW. |
| Feb 21, 11:42 AM CST | SNOW 7 | 2 W Offutt Afb, NE | |
| Feb 21, 11:45 AM CST | SNOW 7 | 2 Sw Papillion, NE | |
| Feb 21, 11:45 AM CST | HEAVY SNOW 8 | Castana, IA | PUBLIC REPORT OF 8.0 INCHES OF SNOW. |
| Feb 21, 11:47 AM CST | HEAVY SNOW 7.5 | 7 Ene Omaha, NE | SNOWFALL AT KOMA THUS FAR, 7.5 INCHES. |
| Feb 21, 11:50 AM CST | HEAVY SNOW 7 | 1 Ese Omaha, NE | PUBLIC REPORT OF 7.0 INCHES OF SNOW. |
| Feb 21, 12:00 PM CST | HEAVY SNOW 4 | Springfield, NE | PUBLIC REPORT OF 4.0 INCHES OF SNOW. |
| Feb 21, 12:00 PM CST | SNOW 7.8 | 1 E Omaha, NE | |
| Feb 21, 12:05 PM CST | HEAVY SNOW 9 | 5 E Missouri Valley, IA | |
| Feb 21, 12:11 PM CST | SNOW 8.5 | 4 S Logan, IA | |
| Feb 21, 12:15 PM CST | HEAVY SNOW 7.5 | 2 Se Bellevue, NE | PUBLIC REPORT OF 7.5 INCHES OF SNOW. |
| Feb 21, 12:15 PM CST | HEAVY SNOW 8.5 | 2 N Bellevue, NE | PUBLIC REPORT OF 8.5 INCHES OF SNOW. |
| Feb 21, 12:20 PM CST | HEAVY SNOW 5 | Glenwood, IA | PUBLIC REPORT OF 5.0 INCHES OF SNOW. |
| Feb 21, 12:20 PM CST | HEAVY SNOW 6 | Herman, NE | PUBLIC REPORT OF 6.0 INCHES OF SNOW. |
| Feb 21, 12:20 PM CST | HEAVY SNOW 8.3 | 1 N Harlan, IA | PUBLIC REPORT OF 8.25 INCHES OF SNOW. |
| Feb 21, 12:21 PM CST | HEAVY SNOW 7 | 1 Wsw Omaha, NE | |
| Feb 21, 12:30 PM CST | HEAVY SNOW 6 | 2 Nnw Omaha, NE | PUBLIC REPORT OF 6.0 INCHES OF SNOW. |
| Feb 21, 12:30 PM CST | HEAVY SNOW 7.5 | Dunlap, IA | PUBLIC REPORT OF 7.5 INCHES OF SNOW. |
| Feb 21, 12:30 PM CST | HEAVY SNOW 8.5 | 4 N Crescent, IA | PUBLIC REPORT OF 8.5 INCHES OF SNOW. |
| Feb 21, 12:30 PM CST | HEAVY SNOW 9 | 4 Nnw Little Sioux, IA | PUBLIC REPORT OF 9.0 INCHES OF SNOW. |
| Feb 21, 12:33 PM CST | HEAVY SNOW 6.5 | 2 Sw Papillion, NE | PUBLIC REPORT OF 6.5 INCHES OF SNOW. |
| Feb 21, 12:40 PM CST | HEAVY SNOW 8 | 2 Sse Carter Lake, IA | PUBLIC REPORT OF 8.0 INCHES OF SNOW. |
| Feb 21, 1:00 PM CST | HEAVY SNOW 9.5 | Onawa, IA | PUBLIC REPORT OF 9.5 INCHES OF SNOW. |
| Feb 21, 1:10 PM CST | HEAVY SNOW 8.5 | 2 N Missouri Valley, IA | PUBLIC REPORT OF 8.5 INCHES OF SNOW. |
| Feb 21, 1:45 PM CST | SNOW 8.2 | 5 Nne Omaha, NE | REPORTED AT FLORENCE, NE. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Omaha, NE (KOAX), launched 12:00Z, 2.7 hours before the alert went out and 45 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.
- Mixed-layer CAPE
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 590 m above ground
- 0-6 km bulk shear
- 49 kt
- 0-1 km storm-relative helicity
- 184 m²/s²
- 0-3 km storm-relative helicity
- 201 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
891 WWUS43 KOAX 211442 WSWOAX URGENT - WINTER WEATHER MESSAGE National Weather Service Omaha/Valley NE 842 AM CST Sun Feb 21 2021 IAZ043-055-056-069-079-NEZ034-045-052-053-212245- /O.UPG.KOAX.WW.Y.0012.000000T0000Z-210222T0000Z/ /O.NEW.KOAX.WS.W.0003.210221T1442Z-210222T0000Z/ Monona-Harrison-Shelby-Pottawattamie-Mills-Burt-Washington- Douglas-Sarpy- Including the cities of Onawa, Mapleton, Missouri Valley, Woodbine, Logan, Dunlap, Harlan, Council Bluffs, Glenwood, Tekamah, Oakland, Lyons, Decatur, Blair, Omaha, Bellevue, Papillion, and La Vista 842 AM CST Sun Feb 21 2021 ...WINTER STORM WARNING IN EFFECT UNTIL 6 PM CST THIS EVENING... * WHAT...Heavy snow. Total snow accumulations of 4 to 8 inches. * WHERE...Portions of east central Nebraska and southwest and west central Iowa. * WHEN...Until 6 PM CST this evening. * 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. && $$ NEZ015-018-032-033-042>044-050-051-065>068-078-088>093-212100- /O.EXT.KOAX.WW.Y.0012.000000T0000Z-210221T2100Z/ Thurston-Wayne-Stanton-Cuming-Platte-Colfax-Dodge-Butler-Saunders- Seward-Lancaster-Cass-Otoe-Saline-Jefferson-Gage-Johnson-Nemaha- Pawnee-Richardson- Including the cities of Pender, Macy, Walthill, Winnebago, Wayne, Stanton, West Point, Wisner, Columbus, Schuyler, Fremont, David City, Wahoo, Ashland, Yutan, Seward, Milford, Lincoln, Plattsmouth, Nebraska City, Crete, Wilber, Fairbury, Beatrice, Tecumseh, Sterling, Auburn, Pawnee City, Table Rock, and Falls City 842 AM CST Sun Feb 21 2021 ...WINTER WEATHER ADVISORY NOW IN EFFECT UNTIL 3 PM CST THIS AFTERNOON... * WHAT...Snow expected. Total snow accumulations of 1 to 4 inches. * WHERE...Portions of east central, northeast and southeast Nebraska. * WHEN...Until 3 PM CST this afternoon. * IMPACTS...Plan on slippery road conditions. PRECAUTIONARY/PREPAREDNESS ACTIONS... Slow down and use caution while traveling. The latest road conditions for the state you are calling from can be obtained by calling 5 1 1. && $$ IAZ080-090-091-212245- /O.CON.KOAX.WW.Y.0012.000000T0000Z-210222T0000Z/ Montgomery-Fremont-Page- Including the cities of Red Oak, Sidney, Hamburg, Tabor, Farragut, Clarinda, and Shenandoah 842 AM CST Sun Feb 21 2021 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 6 PM CST THIS EVENING... * WHAT...Snow expected. Total snow accumulations of 2 to 4 inches. * WHERE...Portions of southwest and west central Iowa. * WHEN...Until 6 PM CST this evening. * IMPACTS...Plan on slippery road conditions in addition to reduced visibilities in falling snow. 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. && $$ Albright
3 follow-up statements
326 WWUS43 KOAX 211958 WSWOAX URGENT - WINTER WEATHER MESSAGE National Weather Service Omaha/Valley NE 158 PM CST Sun Feb 21 2021 NEZ015-018-032-033-042>044-050-051-065>068-078-088>093-212100- /O.CAN.KOAX.WW.Y.0012.000000T0000Z-210221T2100Z/ Thurston-Wayne-Stanton-Cuming-Platte-Colfax-Dodge-Butler-Saunders- Seward-Lancaster-Cass-Otoe-Saline-Jefferson-Gage-Johnson-Nemaha- Pawnee-Richardson- Including the cities of Pender, Macy, Walthill, Winnebago, Wayne, Stanton, West Point, Wisner, Columbus, Schuyler, Fremont, David City, Wahoo, Ashland, Yutan, Seward, Milford, Lincoln, Plattsmouth, Nebraska City, Crete, Wilber, Fairbury, Beatrice, Tecumseh, Sterling, Auburn, Pawnee City, Table Rock, and Falls City 158 PM CST Sun Feb 21 2021 ...WINTER WEATHER ADVISORY IS CANCELLED... Snowfall has ended in the area covered by the advisory, thus the advisory has been cancelled. $$ IAZ043-055-056-069-079-NEZ034-045-052-053-212200- /O.EXT.KOAX.WS.W.0003.000000T0000Z-210221T2200Z/ Monona-Harrison-Shelby-Pottawattamie-Mills-Burt-Washington- Douglas-Sarpy- Including the cities of Onawa, Mapleton, Missouri Valley, Woodbine, Logan, Dunlap, Harlan, Council Bluffs, Glenwood, Tekamah, Oakland, Lyons, Decatur, Blair, Omaha, Bellevue, Papillion, and La Vista 158 PM CST Sun Feb 21 2021 ...WINTER STORM WARNING NOW IN EFFECT UNTIL 4 PM CST THIS AFTERNOON... * WHAT...Snow expected. Additional snowfall accumulations of 1 inch or less. * WHERE...Portions of east central Nebraska and southwest and west central Iowa. * WHEN...Until 4 PM CST this afternoon. * 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. && $$ IAZ080-090-091-212200- /O.EXT.KOAX.WW.Y.0012.000000T0000Z-210221T2200Z/ Montgomery-Fremont-Page- Including the cities of Red Oak, Sidney, Hamburg, Tabor, Farragut, Clarinda, and Shenandoah 158 PM CST Sun Feb 21 2021 ...WINTER WEATHER ADVISORY NOW IN EFFECT UNTIL 4 PM CST THIS AFTERNOON... * WHAT...Snow expected. Additional snowfall accumulations of 1 inch or less. * WHERE...Portions of southwest and west central Iowa. * WHEN...Until 4 PM CST this afternoon. * IMPACTS...Plan on slippery road conditions in addition to reduced visibilities in falling snow. PRECAUTIONARY/PREPAREDNESS ACTIONS... Slow down and use caution while traveling. The latest road conditions for the state you are calling from can be obtained by calling 5 1 1. && $$ Albright
878 WWUS43 KOAX 212107 WSWOAX URGENT - WINTER WEATHER MESSAGE National Weather Service Omaha/Valley NE 307 PM CST Sun Feb 21 2021 IAZ079-NEZ034-045-052-053-212215- /O.CAN.KOAX.WS.W.0003.000000T0000Z-210221T2200Z/ Mills-Burt-Washington-Douglas-Sarpy- Including the cities of Glenwood, Tekamah, Oakland, Lyons, Decatur, Blair, Omaha, Bellevue, Papillion, and La Vista 307 PM CST Sun Feb 21 2021 ...WINTER STORM WARNING IS CANCELLED... Snowfall has ended or will end in the next hour. No additional accumulation is expected. $$ IAZ080-090-091-212215- /O.CAN.KOAX.WW.Y.0012.000000T0000Z-210221T2200Z/ Montgomery-Fremont-Page- Including the cities of Red Oak, Sidney, Hamburg, Tabor, Farragut, Clarinda, and Shenandoah 307 PM CST Sun Feb 21 2021 ...WINTER WEATHER ADVISORY IS CANCELLED... Snowfall has ended or will end in the next hour. No additional accumulation is expected. $$ IAZ043-055-056-069-212215- /O.CON.KOAX.WS.W.0003.000000T0000Z-210221T2200Z/ Monona-Harrison-Shelby-Pottawattamie- Including the cities of Onawa, Mapleton, Missouri Valley, Woodbine, Logan, Dunlap, Harlan, and Council Bluffs 307 PM CST Sun Feb 21 2021 ...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 4 PM CST THIS AFTERNOON... * WHAT...Light snow ending by late afternoon. Additional accumulations of less than a half inch. * WHERE...Portions of east central Nebraska and southwest and west central Iowa. * WHEN...Until 4 PM CST this afternoon. * 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. && $$
711 WWUS43 KOAX 212145 WSWOAX URGENT - WINTER WEATHER MESSAGE National Weather Service Omaha/Valley NE 345 PM CST Sun Feb 21 2021 IAZ043-055-056-069-212245- /O.CAN.KOAX.WS.W.0003.000000T0000Z-210221T2200Z/ Monona-Harrison-Shelby-Pottawattamie- Including the cities of Onawa, Mapleton, Missouri Valley, Woodbine, Logan, Dunlap, Harlan, and Council Bluffs 345 PM CST Sun Feb 21 2021 ...WINTER STORM WARNING IS CANCELLED... light snow is expected to end by late afternoon with no additional accumulation. $$
Nearby
Winter Storm Warnings in Iowa, 2021Winter Storm Warnings in Nebraska, 2021Every winter storm warning in 2021
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.