Alert archive / Missouri / Cold Weather Advisories in 2025
Cold Weather Advisory 4, NWS St. Louis, MO
NWS St. Louis, MO issued this cold weather advisory at Feb 17, 2025, 2:09 AM CST for 14 counties in Missouri; 8 counties in Illinois. It took effect at Feb 17, 2025, 9:00 PM CST. It was in force for 15 hr.
The area
The counties it named.
The facts
- Issued
- Feb 17, 2025, 2:09 AM CST (08:09 UTC)
- In effect from
- Feb 17, 2025, 9:00 PM CST
- Expired
- Feb 18, 2025, 12:00 PM CST
- In force
- 15 hr
- Issued by
- NWS St. Louis, MO
All 22 counties
Adams County, IL, Brown County, IL, Calhoun County, IL, Greene County, IL, Jersey County, IL, Macoupin County, IL, Montgomery County, IL, Pike County, IL, Audrain County, MO, Boone County, MO, Callaway County, MO, Knox County, MO, Lewis County, MO, Lincoln County, MO, Marion County, MO, Moniteau County, MO, Monroe County, MO, Montgomery County, MO, Pike County, MO, Ralls County, MO, Shelby County, MO, Warren County, MO
The radar
The St Louis radar (KLSX), 91 km from the middle of the area, began a volume at 08:13 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 00:00Z, 8.2 hours before the alert went out and 353 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
- 1303 m above ground
- 0-6 km bulk shear
- 84 kt
- 0-1 km storm-relative helicity
- 15 m²/s²
- 0-3 km storm-relative helicity
- -137 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
What forecasters said that day
The local office's own words before this cold weather advisory went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS St. Louis, MO wrote its last area forecast discussion before this cold weather advisory went out at Feb 16, 5:52 PM CST, 8 hours 17 minutes earlier.
Area forecast discussion, Feb 16, 5:52 PM CST, 8 hours 17 minutes before
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</html>Hazardous weather outlook, Feb 16, 3:59 PM CST, 10 hours 10 minutes before
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</html>The office that day
Everything else NWS St. Louis, MO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Feb 17, 2:08 AM CST | Winter Storm Warning | LSX | Crawford, Iron, Madison, Reynolds, Sainte Genevieve, Saint Francois and 1 more | 49 hr |
| Feb 17, 1:44 PM CST | Winter Weather Advisory | LSX | Boone, Callaway, Cole, Franklin, Gasconade, Jefferson and 8 more | 37 hr |
Nearby
Cold Weather Advisories in Missouri, 2025Cold Weather Advisories in Illinois, 2025Every cold weather advisory in 2025
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.