Alert archive / Illinois / Areal Flood Warnings in 2010

Areal Flood Warning 39, NWS St. Louis, MO

July 25, 2010Montgomery County, Illinois

NWS St. Louis, MO issued this areal flood warning at Jul 25, 2010, 4:32 AM CDT for Montgomery County, Illinois. It was in force for 14 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: Jul 25, 2010, 4:32 AM CDT (09:32 UTC)
Expired: Jul 25, 2010, 6:30 PM CDT
In force: 14 hr
Issued by: NWS St. Louis, MO
Area: Storm-based polygon
Flood severity: None

County Montgomery County, IL

The radar

The Lincoln radar (KILX), 103 km from the middle of the area, began a volume at 09:33 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, 9.5 hours before the alert went out and 127 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: 11 J/kg
Mixed-layer CIN: -267 J/kg
Mixed-layer LCL: 2024 m above ground
0-6 km bulk shear: 34 kt
0-1 km storm-relative helicity: 100 m²/s²
0-3 km storm-relative helicity: 128 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this areal flood warning 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 areal flood warning went out at Jul 25, 3:23 AM CDT, 1 hour 9 minutes earlier.

Area forecast discussion, Jul 25, 3:23 AM CDT, 1 hour 9 minutes before

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Hazardous weather outlook, Jul 25, 3:44 AM CDT, 48 minutes before

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In the hours before

Local storm report, Jul 24, 11:30 PM CDT, 5 hours 2 minutes before

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Local storm report, Jul 24, 11:37 PM CDT, 4 hours 55 minutes before

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Local storm report, Jul 24, 11:40 PM CDT, 4 hours 52 minutes before

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Local storm report, Jul 24, 11:43 PM CDT, 4 hours 49 minutes before

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Local storm report, Jul 25, 12:08 AM CDT, 4 hours 24 minutes before

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        If you are an administrator, restore upstream service and remove the redirect/fallback rule when normal operations resume.
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Local storm report, Jul 25, 2:10 AM CDT, 2 hours 22 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.
      </p>
      <p id="message2">
        Please try again in a few minutes.
      </p>
      <p class="small" id="detail">
        If you are an administrator, restore upstream service and remove the redirect/fallback rule when normal operations resume.
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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 24, 7:27 PM CDT	Severe Thunderstorm Warning	LSX	Pike, Ralls	37 min
Jul 24, 7:59 PM CDT	Areal Flood Advisory	LSX	Marion	6 hr
Jul 24, 9:01 PM CDT	Severe Thunderstorm Warning	LSX	Saint Charles, Saint Louis	29 min
Jul 24, 9:17 PM CDT	Severe Thunderstorm Warning	LSX	Saint Charles	33 min
Jul 24, 9:24 PM CDT	Severe Thunderstorm Warning	LSX	City of Saint Louis	36 min
Jul 24, 9:52 PM CDT	Areal Flood Warning	LSX	Marion	11 hr
Jul 24, 10:00 PM CDT	Areal Flood Warning	LSX	Knox, Lewis	11 hr
Jul 25, 1:59 AM CDT	Areal Flood Advisory	LSX	Marion, Ralls	6 hr
Jul 25, 7:57 AM CDT	River Flood Warning	LSX	Lewis	24 hr
Jul 25, 7:57 AM CDT	River Flood Warning	LSX	Lewis	24 hr
Jul 24, 10:20 PM CDT	Flash Flood Warning	LSX	Bond, Fayette, Macoupin, Montgomery	6 hr
Jul 25, 9:54 AM CDT	River Flood Warning	LSX	Morgan, Pike	26 hr

Nearby

Areal Flood Warnings in Illinois, 2010 Every areal flood warning in 2010

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.