Alert archive / Illinois / Flood Watches in 2024
Flood Watch 1, NWS St. Louis, MO
NWS St. Louis, MO issued this flood watch at Apr 1, 2024, 11:14 AM CDT for 8 counties in Illinois. It took effect at Apr 1, 2024, 3:00 PM CDT. It was in force for 14 hr.
The area
The counties it named.
The facts
- Issued
- Apr 1, 2024, 11:14 AM CDT (16:14 UTC)
- In effect from
- Apr 1, 2024, 3:00 PM CDT
- Expired
- Apr 2, 2024, 4:30 AM CDT
- In force
- 14 hr
- Issued by
- NWS St. Louis, MO
- Flood severity
- None
Counties Bond County, IL, Calhoun County, IL, Fayette County, IL, Greene County, IL, Jersey County, IL, Macoupin County, IL, Montgomery County, IL, Pike County, IL
The radar
The St Louis radar (KLSX), 80 km from the middle of the area, began a volume at 16:17 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, 4.2 hours before the alert went out and 161 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
- 621 m above ground
- 0-6 km bulk shear
- 66 kt
- 0-1 km storm-relative helicity
- 40 m²/s²
- 0-3 km storm-relative helicity
- 122 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
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 Apr 1, 5:33 AM CDT, 5 hours 41 minutes earlier.
Area forecast discussion, Apr 1, 5:33 AM CDT, 5 hours 41 minutes before
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</html>Hazardous weather outlook, Apr 1, 4:14 AM CDT, 7 hours before
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The site you requested is temporarily down for maintenance or an unexpected outage.
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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 |
|---|---|---|---|---|
| Apr 1, 5:15 PM CDT | Severe Thunderstorm Warning | LSX | Franklin, Gasconade, Warren | 45 min |
| Apr 1, 5:30 PM CDT | Severe Thunderstorm Warning | LSX | Cole, Moniteau | 45 min |
| Apr 1, 5:49 PM CDT | Severe Thunderstorm Warning | LSX | Franklin, Saint Charles, Saint Louis | 56 min |
| Apr 1, 5:57 PM CDT | Severe Thunderstorm Warning | LSX | Callaway, Cole, Osage | 63 min |
| Apr 1, 6:16 PM CDT | Tornado Warning | LSX | Cole, Osage | 30 min |
| Apr 1, 6:26 PM CDT | Severe Thunderstorm Warning | LSX | Saint Charles, Saint Louis, City of Saint Louis | 49 min |
| Apr 1, 6:33 PM CDT | Tornado Warning | LSX | Saint Louis, City of Saint Louis | 42 min |
| Apr 1, 6:43 PM CDT | Severe Thunderstorm Warning | LSX | Franklin, Gasconade, Montgomery, Warren | 62 min |
| Apr 1, 6:53 PM CDT | Severe Thunderstorm Warning | LSX | Madison | 30 min |
Nearby
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.