Alert archive / Missouri / Flood Watches in 2022

Flood Watch 5, NWS St. Louis, MO

July 25, 202216 counties in Missouri; 15 counties in Illinois

NWS St. Louis, MO issued this flood watch at Jul 25, 2022, 2:59 AM CDT for 16 counties in Missouri; 15 counties in Illinois. It took effect at Jul 25, 2022, 10:00 PM CDT. It was in force for 11 hr.

The area

The counties it named.

The facts

Issued: Jul 25, 2022, 2:59 AM CDT (07:59 UTC)
In effect from: Jul 25, 2022, 10:00 PM CDT
Expired: Jul 26, 2022, 8:55 AM CDT
In force: 11 hr
Issued by: NWS St. Louis, MO
Flood severity: None

All 31 counties

Adams County, IL, Bond County, IL, Brown County, IL, Calhoun County, IL, Clinton County, IL, Fayette County, IL, Greene County, IL, Jersey County, IL, Macoupin County, IL, Madison County, IL, Marion County, IL, Montgomery County, IL, Pike County, IL, Saint Clair County, IL, Washington County, IL, Audrain County, MO, Boone County, MO, Callaway County, MO, City of Saint Louis, MO, Knox County, MO, Lewis County, MO, Lincoln County, MO, Marion County, MO, Monroe County, MO, Montgomery County, MO, Pike County, MO, Ralls County, MO, Saint Charles County, MO, Saint Louis County, MO, Shelby County, MO, Warren County, MO

The radar

The St Louis radar (KLSX), 54 km from the middle of the area, began a volume at 08:02 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 00:00Z, 8.0 hours before the alert went out and 213 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.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 171 J/kg
Mixed-layer CIN: -216 J/kg
Mixed-layer LCL: 980 m above ground
0-6 km bulk shear: 41 kt
0-1 km storm-relative helicity: -7 m²/s²
0-3 km storm-relative helicity: 122 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.3

Open this sounding in Storm Lab

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 Jul 24, 10:50 PM CDT, 4 hours 9 minutes earlier.

Area forecast discussion, Jul 24, 10:50 PM CDT, 4 hours 9 minutes before

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Hazardous weather outlook, Jul 24, 9:39 PM CDT, 5 hours 20 minutes before

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In the hours before

Local storm report, Jul 24, 9:35 PM CDT, 5 hours 24 minutes before

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Local storm report, Jul 24, 9:36 PM CDT, 5 hours 23 minutes before

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      <h1 id="headline">This service is currently unavailable.</h1>
      <p id="message1">
        The site you requested is temporarily down for maintenance or an unexpected outage.
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The office that day

Everything else NWS St. Louis, MO issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jul 25, 6:41 AM CDT	Flash Flood Warning	LSX	Reynolds	4 hr

Nearby

Flood Watches in Missouri, 2022 Flood Watches in Illinois, 2022 Every flood watch in 2022

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.