Alert archive / Missouri / Winter Storm Watches in 2021
Winter Storm Watch 1, NWS St. Louis, MO
NWS St. Louis, MO issued this winter storm watch at Feb 8, 2021, 2:16 PM CST for Iron County, Madison County, Reynolds County, Missouri. It took effect at Feb 10, 2021, 12:00 AM CST. It was in force for .
The area
The counties it named.
The facts
- Issued
- Feb 8, 2021, 2:16 PM CST (20:16 UTC)
- In effect from
- Feb 10, 2021, 12:00 AM CST
- Expired
- Feb 9, 2021, 4:02 AM CST
- In force
- Issued by
- NWS St. Louis, MO
Counties Iron County, MO, Madison County, MO, Reynolds County, MO
The radar
The St Louis radar (KLSX), 139 km from the middle of the area, began a volume at 20:15 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
Springfield, MO (KSGF), launched 12:00Z, 8.3 hours before the alert went out and 284 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
- 536 m above ground
- 0-6 km bulk shear
- 61 kt
- 0-1 km storm-relative helicity
- -42 m²/s²
- 0-3 km storm-relative helicity
- 56 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
623 WWUS43 KLSX 082016 WSWLSX URGENT - WINTER WEATHER MESSAGE National Weather Service Saint Louis MO 216 PM CST Mon Feb 8 2021 MOZ084-085-099-091200- /O.NEW.KLSX.WS.A.0001.210210T0600Z-210211T1200Z/ /O.CON.KLSX.WW.Y.0010.000000T0000Z-210209T1200Z/ Iron MO-Madison MO-Reynolds MO- 216 PM CST Mon Feb 8 2021 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 6 AM CST TUESDAY... ...WINTER STORM WATCH IN EFFECT FROM LATE TUESDAY NIGHT THROUGH LATE WEDNESDAY NIGHT... * WHAT...For the Winter Weather Advisory, a mix of freezing drizzle and sleet is expected tonight. Additional sleet accumulations of less than a half inch and ice accumulations of one tenth to two tenths of an inch. For the Winter Storm Watch, a mix of freezing rain and sleet is likely late Tuesday night through late Wednesday night. Total sleet accumulation of up to a half inch and ice accumulations up to a quarter inch is possible. * WHERE...Iron MO, Madison MO and Reynolds MO Counties. * WHEN...For the Winter Weather Advisory, until 6 AM CST Tuesday. For the Winter Storm Watch, from late Tuesday night through late Wednesday night. * IMPACTS...Power outages and tree damage are possible due to the ice. Travel could be nearly impossible. The hazardous conditions could impact the morning or evening commute. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Winter Weather Advisory is issued for a variety of winter weather conditions, such as snow, blowing snow, sleet, or freezing drizzle and rain. It only takes a small amount of wintry precipitation to make roads, bridges, sidewalks, and parking lots icy and dangerous. It is often difficult to tell when ice begins to form, so do not be caught off guard. A Winter Storm Watch is advanced notice that the potential for severe winter weather exists in the Watch area, but it does not mean it is a certainty. Those in the Watch area should begin preparing in case the storm does materialize. If you have travel planned, you may want to adjust your travel time to avoid the storm. Also, you should use this advanced notice to make certain your vehicle is winterized. Make preparations at home by stocking emergency supplies, such as food, medicine, and extra heating fuel, just in case the storm makes travel impossible. This is especially important for those living in rural areas. The latest road conditions can be obtained on the Internet at traveler.modot.org/map/ or by calling 1-888-275-6636. && $$ ILZ069-070-074-079-101-102-MOZ065-072>075-091200- /O.CON.KLSX.WW.Y.0010.000000T0000Z-210209T1200Z/ Clinton IL-Crawford MO-Jefferson MO-Marion IL-Monroe IL- Randolph IL-Saint Clair-Saint Francois MO-Sainte Genevieve MO- Washington IL-Washington MO- Including the cities of Belleville, Cahokia, Centralia, Chester, Farmington, Salem, and Sparta 216 PM CST Mon Feb 8 2021 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 6 AM CST TUESDAY... * WHAT...Light snow, sleet and freezing drizzle are expected. Total snow and sleet accumulations of less than an inch and ice accumulations of around one tenth of an inch. * WHERE...Portions of east central Missouri and south central and southwest Illinois. * WHEN...From 1 PM this afternoon to 6 AM CST Tuesday. * IMPACTS...Plan on hazardous road conditions for the evening commute. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Winter Weather Advisory is issued for a variety of winter weather conditions, such as snow, blowing snow, sleet, or freezing drizzle and rain. It only takes a small amount of wintry precipitation to make roads, bridges, sidewalks, and parking lots icy and dangerous. It is often difficult to tell when ice begins to form, so do not be caught off guard. In Illinois, the latest road conditions can be obtained on the Internet at www.gettingaroundillinois.com. In Missouri, the latest road conditions can be obtained on the Internet at traveler.modot.org/map/ or by calling 1-888-275-6636. && $$ CVKING
2 follow-up statements
140 WWUS43 KLSX 090357 WSWLSX URGENT - WINTER WEATHER MESSAGE National Weather Service Saint Louis MO 957 PM CST Mon Feb 8 2021 ILZ064-065-098>100-MOZ052-059>064-091200- /O.EXA.KLSX.WW.Y.0010.000000T0000Z-210209T1200Z/ Bond IL-Calhoun IL-Fayette IL-Franklin MO-Gasconade MO-Jersey IL- Lincoln MO-Madison IL-Saint Charles MO-Saint Louis City MO- Saint Louis MO-Warren MO- Including the cities of Alton, Edwardsville, Saint Charles, Saint Louis, Sullivan, Union, Vandalia, and Washington 957 PM CST Mon Feb 8 2021 ...WINTER WEATHER ADVISORY IN EFFECT UNTIL 6 AM CST TUESDAY... * WHAT...Mixed precipitation. Additional snow accumulations of up to one inch and ice accumulations of a light glaze. * WHERE...Portions of east central Missouri and south central and southwest Illinois. * WHEN...Until 6 AM CST Tuesday. * IMPACTS...Plan on slippery road conditions. The hazardous conditions could impact the morning commute. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Winter Weather Advisory is issued for a variety of winter weather conditions, such as snow, blowing snow, sleet, or freezing drizzle and rain. It only takes a small amount of wintry precipitation to make roads, bridges, sidewalks, and parking lots icy and dangerous. It is often difficult to tell when ice begins to form, so do not be caught off guard. In Illinois, the latest road conditions can be obtained on the Internet at www.gettingaroundillinois.com. In Missouri, the latest road conditions can be obtained on the Internet at traveler.modot.org/map/ or by calling 1-888-275-6636. && $$ MOZ084-085-099-091600- /O.CON.KLSX.WW.Y.0010.000000T0000Z-210209T1200Z/ /O.CON.KLSX.WS.A.0001.210210T0600Z-210211T1200Z/ Iron MO-Madison MO-Reynolds MO- 957 PM CST Mon Feb 8 2021 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 6 AM CST TUESDAY... ...WINTER STORM WATCH REMAINS IN EFFECT FROM LATE TUESDAY NIGHT THROUGH LATE WEDNESDAY NIGHT... * WHAT...For the Winter Weather Advisory, mixed precipitation. Additional snow accumulations of up to one inch and ice accumulations of around one tenth of an inch. For the Winter Storm Watch, heavy mixed precipitation possible. Total snow accumulations of up to one inch and ice accumulations of one tenth to two tenths of an inch possible. * WHERE...Reynolds MO, Iron MO and Madison MO Counties. * WHEN...For the Winter Weather Advisory, until 6 AM CST Tuesday. For the Winter Storm Watch, from late Tuesday night through late Wednesday night. * IMPACTS...Plan on slippery road conditions. The hazardous conditions could impact the morning or evening commute. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Winter Weather Advisory is issued for a variety of winter weather conditions, such as snow, blowing snow, sleet, or freezing drizzle and rain. It only takes a small amount of wintry precipitation to make roads, bridges, sidewalks, and parking lots icy and dangerous. It is often difficult to tell when ice begins to form, so do not be caught off guard. A Winter Storm Watch is advanced notice that the potential for severe winter weather exists in the Watch area, but it does not mean it is a certainty. Those in the Watch area should begin preparing in case the storm does materialize. If you have travel planned, you may want to adjust your travel time to avoid the storm. Also, you should use this advanced notice to make certain your vehicle is winterized. Make preparations at home by stocking emergency supplies, such as food, medicine, and extra heating fuel, just in case the storm makes travel impossible. This is especially important for those living in rural areas. The latest road conditions can be obtained on the Internet at traveler.modot.org/map/ or by calling 1-888-275-6636. && $$ ILZ069-070-074-079-101-102-MOZ065-072>075-091200- /O.CON.KLSX.WW.Y.0010.000000T0000Z-210209T1200Z/ Clinton IL-Crawford MO-Jefferson MO-Marion IL-Monroe IL- Randolph IL-Saint Clair-Saint Francois MO-Sainte Genevieve MO- Washington IL-Washington MO- Including the cities of Belleville, Cahokia, Centralia, Chester, Farmington, Salem, and Sparta 957 PM CST Mon Feb 8 2021 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 6 AM CST TUESDAY... * WHAT...Mixed precipitation. Additional snow accumulations of up to one inch and ice accumulations of up to one tenth of an inch. * WHERE...Portions of east central and southeast Missouri and south central and southwest Illinois. * WHEN...Until 6 AM CST Tuesday. * IMPACTS...Plan on slippery road conditions. The hazardous conditions could impact the morning commute. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Winter Weather Advisory is issued for a variety of winter weather conditions, such as snow, blowing snow, sleet, or freezing drizzle and rain. It only takes a small amount of wintry precipitation to make roads, bridges, sidewalks, and parking lots icy and dangerous. It is often difficult to tell when ice begins to form, so do not be caught off guard. In Illinois, the latest road conditions can be obtained on the Internet at www.gettingaroundillinois.com. In Missouri, the latest road conditions can be obtained on the Internet at traveler.modot.org/map/ or by calling 1-888-275-6636. && $$ Carney
694 WWUS43 KLSX 091002 WSWLSX URGENT - WINTER WEATHER MESSAGE National Weather Service Saint Louis MO 402 AM CST Tue Feb 9 2021 MOZ084-085-099-092215- /O.CAN.KLSX.WW.Y.0010.000000T0000Z-210209T1200Z/ /O.UPG.KLSX.WS.A.0001.210210T0600Z-210211T1200Z/ /O.NEW.KLSX.WW.Y.0011.210210T0600Z-210211T1200Z/ Iron MO-Madison MO-Reynolds MO- 402 AM CST Tue Feb 9 2021 ...WINTER WEATHER ADVISORY IN EFFECT FROM MIDNIGHT TONIGHT TO 6 AM CST THURSDAY... ...WINTER WEATHER ADVISORY IS CANCELLED... * WHAT...Mixed precipitation expected. Total snow accumulations of up to one inch and ice accumulations of up to one tenth of an inch. * WHERE...Iron MO, Madison MO and Reynolds MO Counties. * WHEN...From midnight tonight to 6 AM CST Thursday. * IMPACTS...Plan on slippery road conditions. The hazardous conditions could impact the morning or evening commute. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Winter Weather Advisory is issued for a variety of winter weather conditions, such as snow, blowing snow, sleet, or freezing drizzle and rain. It only takes a small amount of wintry precipitation to make roads, bridges, sidewalks, and parking lots icy and dangerous. It is often difficult to tell when ice begins to form, so do not be caught off guard. The latest road conditions can be obtained on the Internet at traveler.modot.org/map/ or by calling 1-888-275-6636. && $$ ILZ064-065-069-070-074-079-098>102-MOZ052-059>065-072>075-091115- /O.CAN.KLSX.WW.Y.0010.000000T0000Z-210209T1200Z/ Bond IL-Calhoun IL-Clinton IL-Crawford MO-Fayette IL-Franklin MO- Gasconade MO-Jefferson MO-Jersey IL-Lincoln MO-Madison IL- Marion IL-Monroe IL-Randolph IL-Saint Charles MO-Saint Clair- Saint Francois MO-Saint Louis City MO-Saint Louis MO- Sainte Genevieve MO-Warren MO-Washington IL-Washington MO- Including the cities of Alton, Belleville, Cahokia, Centralia, Chester, Edwardsville, Farmington, Saint Charles, Saint Louis, Salem, Sparta, Sullivan, Union, Vandalia, and Washington 402 AM CST Tue Feb 9 2021 ...WINTER WEATHER ADVISORY IS CANCELLED... Accumulating snow has ended. Therefore, the advisory has been cancelled. $$ Gosselin
The office that day
Everything else NWS St. Louis, MO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Feb 8, 9:18 AM CST | Winter Weather Advisory | LSX | Crawford, Franklin, Gasconade, Iron, Jefferson, Lincoln and 9 more | 19 hr |
Nearby
Winter Storm Watches in Missouri, 2021Every winter storm watch 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.