Alert archive / Missouri / Freeze Warnings in 2021
Freeze Warning 2, NWS St. Louis, MO
NWS St. Louis, MO issued this freeze warning at Mar 31, 2021, 2:44 PM CDT for 21 counties in Missouri; 11 counties in Illinois. It took effect at Apr 2, 2021, 1:00 AM CDT. It was in force for 8 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
- Mar 31, 2021, 2:44 PM CDT (19:44 UTC)
- In effect from
- Apr 2, 2021, 1:00 AM CDT
- Expired
- Apr 2, 2021, 9:00 AM CDT
- In force
- 8 hr
- Issued by
- NWS St. Louis, MO
All 32 counties
Bond County, IL, Calhoun County, IL, Clinton County, IL, Fayette County, IL, Jersey County, IL, Madison County, IL, Marion County, IL, Monroe County, IL, Randolph County, IL, Saint Clair County, IL, Washington County, IL, Boone County, MO, Callaway County, MO, City of Saint Louis, MO, Cole County, MO, Crawford County, MO, Franklin County, MO, Gasconade County, MO, Iron County, MO, Jefferson County, MO, Lincoln County, MO, Madison County, MO, Moniteau County, MO, Montgomery County, MO, Osage County, MO, Reynolds County, MO, Saint Charles County, MO, Saint Francois County, MO, Saint Louis County, MO, Sainte Genevieve County, MO, Warren County, MO, Washington County, MO
The radar
The St Louis radar (KLSX), 27 km from the middle of the area, began a volume at 19:45 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
Lincoln, IL (KILX), launched 12:00Z, 7.7 hours before the alert went out and 258 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
- 1759 m above ground
- 0-6 km bulk shear
- 104 kt
- 0-1 km storm-relative helicity
- -266 m²/s²
- 0-3 km storm-relative helicity
- -176 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
777 WWUS73 KLSX 311944 NPWLSX URGENT - WEATHER MESSAGE National Weather Service Saint Louis MO 244 PM CDT Wed Mar 31 2021 ILZ064-065-069-070-074-079-098>102-MOZ041-047>052-059>065-072>075- 084-085-099-011000- /O.NEW.KLSX.FZ.W.0002.210402T0600Z-210402T1400Z/ /O.CON.KLSX.FZ.W.0001.210401T0600Z-210401T1400Z/ Bond IL-Boone MO-Calhoun IL-Callaway MO-Clinton IL-Cole MO- Crawford MO-Fayette IL-Franklin MO-Gasconade MO-Iron MO- Jefferson MO-Jersey IL-Lincoln MO-Madison IL-Madison MO-Marion IL- Moniteau MO-Monroe IL-Montgomery MO-Osage MO-Randolph IL- Reynolds MO-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, Columbia, Edwardsville, Farmington, Fulton, Jefferson City, Saint Charles, Saint Louis, Salem, Sparta, Sullivan, Union, Vandalia, and Washington 244 PM CDT Wed Mar 31 2021 ...FREEZE WARNING REMAINS IN EFFECT FROM 1 AM TO 9 AM CDT THURSDAY... ...FREEZE WARNING IN EFFECT FROM 1 AM TO 9 AM CDT FRIDAY... * WHAT...For the first Freeze Warning, sub-freezing temperatures in the low to mid 20s expected. For the second Freeze Warning, sub- freezing temperatures in the 20s expected. * WHERE...Portions of central, east central and southeast Missouri and south central and southwest Illinois. * WHEN...For the first Freeze Warning, from 1 AM to 9 AM CDT Thursday. For the second Freeze Warning, from 1 AM to 9 AM CDT Friday. * IMPACTS...Frost and freeze conditions will kill crops, other sensitive vegetation and possibly damage unprotected outdoor plumbing. PRECAUTIONARY/PREPAREDNESS ACTIONS... Take steps now to protect tender plants from the cold. To prevent freezing and possible bursting of outdoor water pipes they should be wrapped, drained, or allowed to drip slowly. Those that have in-ground sprinkler systems should drain them and cover above- ground pipes to protect them from freezing. && $$ Byrd
5 follow-up statements
766 WWUS73 KLSX 010849 NPWLSX URGENT - WEATHER MESSAGE National Weather Service Saint Louis MO 349 AM CDT Thu Apr 1 2021 ILZ064-065-069-070-074-079-098>102-MOZ041-047>052-059>065-072>075- 084-085-099-012200- /O.CON.KLSX.FZ.W.0001.000000T0000Z-210401T1400Z/ /O.CON.KLSX.FZ.W.0002.210402T0600Z-210402T1400Z/ Bond IL-Boone MO-Calhoun IL-Callaway MO-Clinton IL-Cole MO- Crawford MO-Fayette IL-Franklin MO-Gasconade MO-Iron MO- Jefferson MO-Jersey IL-Lincoln MO-Madison IL-Madison MO-Marion IL- Moniteau MO-Monroe IL-Montgomery MO-Osage MO-Randolph IL- Reynolds MO-Saint Charles MO-Saint Clair-Saint Francois MO- Saint Louis City MO-Saint Louis MO-Sainte Genevieve MO-Warren MO- Washington IL-Washington MO- Including the cities of Alton, Belleville, Cahokia, Centralia, Chester, Columbia, Edwardsville, Farmington, Fulton, Jefferson City, Saint Charles, Saint Louis, Salem, Sparta, Sullivan, Union, Vandalia, and Washington 349 AM CDT Thu Apr 1 2021 ...FREEZE WARNING REMAINS IN EFFECT UNTIL 9 AM CDT THIS MORNING... ...FREEZE WARNING REMAINS IN EFFECT FROM 1 AM LATE TONIGHT TO 9 AM CDT FRIDAY MORNING... * WHAT...Sub-freezing temperatures in the 20s expected. * WHERE...Portions of central, east central and southeast Missouri and southwest Illinois. * WHEN...For the first Freeze Warning, until 9 AM CDT this morning. For the second Freeze Warning, from 1 AM to 9 AM CDT Friday. * IMPACTS...Frost and freeze conditions will kill crops, other sensitive vegetation and possibly damage unprotected outdoor plumbing. PRECAUTIONARY/PREPAREDNESS ACTIONS... Take steps now to protect tender plants from the cold. To prevent freezing and possible bursting of outdoor water pipes they should be wrapped, drained, or allowed to drip slowly. Those that have in-ground sprinkler systems should drain them and cover above- ground pipes to protect them from freezing. && $$ GKS
348 WWUS73 KLSX 011403 NPWLSX URGENT - WEATHER MESSAGE National Weather Service Saint Louis MO Issued by National Weather Service Lincoln IL 903 AM CDT Thu Apr 1 2021 ILZ064-065-069-070-074-079-098>102-MOZ041-047>052-059>065-072>075- 084-085-099-012300- /O.EXP.KLSX.FZ.W.0001.000000T0000Z-210401T1400Z/ /O.CON.KLSX.FZ.W.0002.210402T0600Z-210402T1400Z/ Bond-Boone-Calhoun-Callaway-Clinton-Cole-Crawford-Fayette- Franklin-Gasconade-Iron-Jefferson-Jersey-Lincoln-Madison-Marion- Moniteau-Monroe-Montgomery-Osage-Randolph-Reynolds-St. Charles- St. Clair-St. Francois-St. Louis-St. Louis City-Ste. Genevieve- Warren-Washington- Including the cities of Alton, Arnold, Belleville, Breese, California, Chester, Chesterfield, Columbia, East St. Louis, Edwardsville, Ellington, Farmington, Fredericktown, Fulton, Greenville, Hardin, Hermann, Ironton, Jefferson City, Jerseyville, Linn, Montgomery City, Nashville, Pacific, Potosi, Salem, St. Charles, St. Louis, St. Peters, Ste. Genevieve, Steelville, Troy, Vandalia, and Warrenton 903 AM CDT Thu Apr 1 2021 ...FREEZE WARNING REMAINS IN EFFECT FROM 1 AM TO 9 AM CDT FRIDAY... ...FREEZE WARNING FOR THIS MORNING HAS EXPIRED... * WHAT...Sub-freezing temperatures in the 20s expected. * WHERE...Portions of central, east central and southeast Missouri and southwest Illinois. * WHEN...From 1 AM to 9 AM CDT Friday. * IMPACTS...Frost and freeze conditions will kill crops, other sensitive vegetation and possibly damage unprotected outdoor plumbing. PRECAUTIONARY/PREPAREDNESS ACTIONS... Take steps now to protect tender plants from the cold. To prevent freezing and possible bursting of outdoor water pipes they should be wrapped, drained, or allowed to drip slowly. Those that have in-ground sprinkler systems should drain them and cover above- ground pipes to protect them from freezing. && $$ Geelhart
902 WWUS73 KLSX 012002 NPWLSX URGENT - WEATHER MESSAGE National Weather Service Saint Louis MO Issued by National Weather Service Lincoln IL 302 PM CDT Thu Apr 1 2021 ILZ064-065-069-070-074-079-098>102-MOZ041-047>052-059>065-072>075- 084-085-099-020900- /O.CON.KLSX.FZ.W.0002.210402T0600Z-210402T1400Z/ Bond-Boone-Calhoun-Callaway-Clinton-Cole-Crawford-Fayette- Franklin-Gasconade-Iron-Jefferson-Jersey-Lincoln-Madison-Marion- Moniteau-Monroe-Montgomery-Osage-Randolph-Reynolds-St. Charles- St. Clair-St. Francois-St. Louis-St. Louis City-Ste. Genevieve- Warren-Washington- Including the cities of Alton, Arnold, Belleville, Breese, California, Chester, Chesterfield, Columbia, East St. Louis, Edwardsville, Ellington, Farmington, Fredericktown, Fulton, Greenville, Hardin, Hermann, Ironton, Jefferson City, Jerseyville, Linn, Montgomery City, Nashville, Pacific, Potosi, Salem, St. Charles, St. Louis, St. Peters, Ste. Genevieve, Steelville, Troy, Vandalia, and Warrenton 302 PM CDT Thu Apr 1 2021 ...FREEZE WARNING REMAINS IN EFFECT FROM 1 AM TO 9 AM CDT FRIDAY... * WHAT...Sub-freezing temperatures, ranging from the lower 20s over south central Illinois, to the mid 20s elsewhere. * WHERE...Portions of central, east central and southeast Missouri, and south central and southwest Illinois. * WHEN...From 1 AM to 9 AM CDT Friday. * IMPACTS...Frost and freeze conditions may kill early blooming plants and other sensitive vegetation if not covered. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Freeze Warning means sub-freezing temperatures are imminent or highly likely. Cover any sensitive vegetation. && $$ Geelhart
215 WWUS73 KLSX 020847 NPWLSX URGENT - WEATHER MESSAGE National Weather Service Saint Louis MO 347 AM CDT Fri Apr 2 2021 ILZ064-065-069-070-074-079-098>102-MOZ041-047>052-059>065-072>075- 084-085-099-021400- /O.CON.KLSX.FZ.W.0002.000000T0000Z-210402T1400Z/ Bond IL-Boone MO-Calhoun IL-Callaway MO-Clinton IL-Cole MO- Crawford MO-Fayette IL-Franklin MO-Gasconade MO-Iron MO- Jefferson MO-Jersey IL-Lincoln MO-Madison IL-Madison MO-Marion IL- Moniteau MO-Monroe IL-Montgomery MO-Osage MO-Randolph IL- Reynolds MO-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, Columbia, Edwardsville, Farmington, Fulton, Jefferson City, Saint Charles, Saint Louis, Salem, Sparta, Sullivan, Union, Vandalia, and Washington 347 AM CDT Fri Apr 2 2021 ...FREEZE WARNING REMAINS IN EFFECT UNTIL 9 AM CDT THIS MORNING... * WHAT...Sub-freezing temperatures in the 20s. * WHERE...Portions of central, east central and southeast Missouri, and southwest Illinois. * WHEN...Until 9 AM CDT this morning. * IMPACTS...Frost and freeze conditions may kill early blooming plants and other sensitive vegetation if not covered. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Freeze Warning means sub-freezing temperatures are imminent or highly likely. Cover any sensitive vegetation. && $$ GKS
608 WWUS73 KLSX 021359 NPWLSX URGENT - WEATHER MESSAGE National Weather Service Saint Louis MO 859 AM CDT Fri Apr 2 2021 ILZ064-065-069-070-074-079-098>102-MOZ041-047>052-059>065-072>075- 084-085-099-021500- /O.EXP.KLSX.FZ.W.0002.000000T0000Z-210402T1400Z/ Bond IL-Boone MO-Calhoun IL-Callaway MO-Clinton IL-Cole MO- Crawford MO-Fayette IL-Franklin MO-Gasconade MO-Iron MO- Jefferson MO-Jersey IL-Lincoln MO-Madison IL-Madison MO-Marion IL- Moniteau MO-Monroe IL-Montgomery MO-Osage MO-Randolph IL- Reynolds MO-Saint Charles MO-Saint Clair-Saint Francois MO- Saint Louis City MO-Saint Louis MO-Sainte Genevieve MO-Warren MO- Washington IL-Washington MO- Including the cities of Alton, Belleville, Cahokia, Centralia, Chester, Columbia, Edwardsville, Farmington, Fulton, Jefferson City, Saint Charles, Saint Louis, Salem, Sparta, Sullivan, Union, Vandalia, and Washington 859 AM CDT Fri Apr 2 2021 ...FREEZE WARNING WILL EXPIRE AT 9 AM CDT THIS MORNING... Temperatures have risen above freezing in most areas, allowing the freeze warning to expire. $$ BRC
The office that day
Everything else NWS St. Louis, MO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Mar 31, 4:31 AM CDT | Red Flag Warning | LSX | Audrain, Boone, Callaway, Cole, Crawford, Franklin and 16 more | 14 hr |
Nearby
Freeze Warnings in Missouri, 2021Freeze Warnings in Illinois, 2021Every freeze 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.