Alert archive / Missouri / Flood Watches in 2025
Flood Watch 7, NWS St. Louis, MO
NWS St. Louis, MO issued this flood watch at Aug 9, 2025, 3:00 PM CDT for 4 counties in Missouri; Adams County, Illinois. It took effect at Aug 10, 2025, 1:00 AM CDT. It was in force for 13 hr.
The area
The counties it named.
The facts
- Issued
- Aug 9, 2025, 3:00 PM CDT (20:00 UTC)
- In effect from
- Aug 10, 2025, 1:00 AM CDT
- Expired
- Aug 10, 2025, 1:38 PM CDT
- In force
- 13 hr
- Issued by
- NWS St. Louis, MO
- Flood severity
- None
Counties Adams County, IL, Knox County, MO, Lewis County, MO, Marion County, MO, Shelby County, MO
The radar
The St Louis radar (KLSX), 168 km from the middle of the area, began a volume at 20:00 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, 8.0 hours before the alert went out and 269 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
- 1123 J/kg
- Mixed-layer CIN
- -220 J/kg
- Mixed-layer LCL
- 1242 m above ground
- 0-6 km bulk shear
- 6 kt
- 0-1 km storm-relative helicity
- -43 m²/s²
- 0-3 km storm-relative helicity
- 37 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.7
What forecasters said that day
The local office's own words before this flood watch 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 flood watch went out at Aug 9, 12:39 PM CDT, 2 hours 21 minutes earlier.
Area forecast discussion, Aug 9, 12:39 PM CDT, 2 hours 21 minutes before
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</html>Hazardous weather outlook, Aug 9, 4:16 AM CDT, 10 hours 44 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 |
|---|---|---|---|---|
| Aug 9, 5:35 PM CDT | Severe Thunderstorm Warning | LSX | Knox, Shelby | 70 min |
| Aug 9, 6:07 PM CDT | Tornado Warning | LSX | Knox, Shelby | 28 min |
| Aug 9, 6:15 PM CDT | Areal Flood Advisory | LSX | Knox | 2 hr |
| Aug 9, 6:23 PM CDT | Severe Thunderstorm Warning | LSX | Shelby | 22 min |
| Aug 9, 6:42 PM CDT | Severe Thunderstorm Warning | LSX | Knox, Lewis, Marion, Shelby | 48 min |
Nearby
Flood Watches in Missouri, 2025Flood Watches in Illinois, 2025Every flood watch 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.