Alert archive / Missouri / Wind Chill Advisories in 2021
Wind Chill Advisory 2, NWS St. Louis, MO
NWS St. Louis, MO issued this wind chill advisory at Feb 11, 2021, 12:35 PM CST for Adams County, Brown County, Pike County, Illinois; 14 counties in Missouri. It took effect at Feb 12, 2021, 12:00 AM CST. It was in force for 12 hr.
The area
The counties it named.
The facts
- Issued
- Feb 11, 2021, 12:35 PM CST (18:35 UTC)
- In effect from
- Feb 12, 2021, 12:00 AM CST
- Expired
- Feb 12, 2021, 12:00 PM CST
- In force
- 12 hr
- Issued by
- NWS St. Louis, MO
Counties Adams County, IL, Brown County, IL, Pike County, IL, Audrain County, MO, Boone County, MO, Callaway County, MO, Cole County, MO, Knox County, MO, Lewis County, MO, Marion County, MO, Moniteau County, MO, Monroe County, MO, Montgomery County, MO, Osage County, MO, Pike County, MO, Ralls County, MO, Shelby County, MO
The radar
The St Louis radar (KLSX), 117 km from the middle of the area, began a volume at 18:33 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
Davenport, (KDVN), launched 12:00Z, 6.6 hours before the alert went out and 270 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
- 1406 m above ground
- 0-6 km bulk shear
- 80 kt
- 0-1 km storm-relative helicity
- -36 m²/s²
- 0-3 km storm-relative helicity
- 119 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
218 WWUS43 KLSX 111835 WSWLSX URGENT - WINTER WEATHER MESSAGE National Weather Service Saint Louis MO 1235 PM CST Thu Feb 11 2021 ILZ095>097-MOZ018-019-026-027-034>036-041-042-047>051-121245- /O.NEW.KLSX.WC.Y.0002.210212T0600Z-210212T1800Z/ Adams IL-Audrain MO-Boone MO-Brown IL-Callaway MO-Cole MO-Knox MO- Lewis MO-Marion MO-Moniteau MO-Monroe MO-Montgomery MO-Osage MO- Pike IL-Pike MO-Ralls MO-Shelby MO- Including the cities of Bowling Green, Columbia, Fulton, Hannibal, Jefferson City, Mexico, Mount Sterling, Pittsfield, and Quincy 1235 PM CST Thu Feb 11 2021 ...WIND CHILL ADVISORY IN EFFECT FROM MIDNIGHT TONIGHT TO NOON CST FRIDAY... * WHAT...Very cold wind chills expected. Wind chills as low as 20 below zero. * WHERE...Portions of central, east central and northeast Missouri and west central Illinois. * WHEN...From midnight tonight to noon CST Friday. * IMPACTS...The cold wind chills could result in hypothermia if precautions are not taken. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Wind Chill Advisory means that very cold air and strong winds will combine to generate low wind chill values. This will result in frost bite and lead to hypothermia if precautions are not taken. If you must venture outdoors, make sure you wear a hat and gloves, making sure all exposed skin is covered. && $$ Elmore
1 follow-up statement
097 WWUS43 KLSX 121010 WSWLSX URGENT - WINTER WEATHER MESSAGE National Weather Service Saint Louis MO 410 AM CST Fri Feb 12 2021 ILZ095>097-MOZ018-019-026-027-034>036-041-042-047>051-122215- /O.NEW.KLSX.WC.Y.0003.210213T0300Z-210213T1800Z/ /O.CON.KLSX.WC.Y.0002.000000T0000Z-210212T1800Z/ Adams IL-Audrain MO-Boone MO-Brown IL-Callaway MO-Cole MO-Knox MO- Lewis MO-Marion MO-Moniteau MO-Monroe MO-Montgomery MO-Osage MO- Pike IL-Pike MO-Ralls MO-Shelby MO- Including the cities of Bowling Green, Columbia, Fulton, Hannibal, Jefferson City, Mexico, Mount Sterling, Pittsfield, and Quincy 410 AM CST Fri Feb 12 2021 ...WIND CHILL ADVISORY REMAINS IN EFFECT UNTIL NOON CST TODAY... ...WIND CHILL ADVISORY IN EFFECT FROM 9 PM THIS EVENING TO NOON CST SATURDAY... * WHAT...Very cold wind chills as low as 15 to 20 below zero are expected this morning and then again tonight into Saturday morning. * WHERE...Portions of central, east central and northeast Missouri and west central Illinois. * WHEN...For the first Wind Chill Advisory, until noon CST today. For the second Wind Chill Advisory, from 9 PM this evening to noon CST Saturday. * IMPACTS...The cold wind chills could result in hypothermia if precautions are not taken. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Wind Chill Advisory means that very cold air and strong winds will combine to generate low wind chill values. This will result in frost bite and lead to hypothermia if precautions are not taken. If you must venture outdoors, make sure you wear a hat and gloves, making sure all exposed skin is covered. && $$ Glass
Nearby
Wind Chill Advisories in Missouri, 2021Wind Chill Advisories in Illinois, 2021Every wind chill advisory 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.