Alert archive / Missouri / Areal Flood Warnings in 2015

Areal Flood Warning 56, NWS St. Louis, MO

December 27, 201516 counties in Missouri; 10 counties in Illinois

NWS St. Louis, MO issued this areal flood warning at Dec 27, 2015, 3:05 PM CST for 16 counties in Missouri; 10 counties in Illinois. It was in force for 24 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: Dec 27, 2015, 3:05 PM CST (21:05 UTC)
Expired: Dec 28, 2015, 3:00 PM CST
In force: 24 hr
Issued by: NWS St. Louis, MO
Area: Storm-based polygon
Flood severity: None

All 26 counties

Bond County, IL, Calhoun County, IL, Fayette County, IL, Greene County, IL, Jersey County, IL, Macoupin County, IL, Madison County, IL, Monroe County, IL, Montgomery County, IL, Saint Clair County, IL, Audrain County, MO, Boone County, MO, Callaway County, MO, Cole County, MO, Crawford County, MO, Franklin County, MO, Gasconade County, MO, Jefferson County, MO, Lincoln County, MO, Moniteau County, MO, Montgomery County, MO, Osage County, MO, Saint Charles County, MO, Saint Louis County, MO, Warren County, MO, Washington County, MO

The radar

The St Louis radar (KLSX), 16 km from the middle of the area, began a volume at 21:07 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, 9.1 hours before the alert went out and 248 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: 2 J/kg
Mixed-layer CIN: 0 J/kg
Mixed-layer LCL: 514 m above ground
0-6 km bulk shear: 73 kt
0-1 km storm-relative helicity: -27 m²/s²
0-3 km storm-relative helicity: -19 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 Dec 27, 11:53 AM CST, 3 hours 12 minutes earlier.

Area forecast discussion, Dec 27, 11:53 AM CST, 3 hours 12 minutes before

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Hazardous weather outlook, Dec 27, 2:23 AM CST, 12 hours 42 minutes before

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In the hours before

Local storm report, Dec 27, 1:25 PM CST, 1 hour 40 minutes before

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Local storm report, Dec 27, 1:45 PM CST, 1 hour 20 minutes before

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Local storm report, Dec 27, 2:21 PM CST, 44 minutes before

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Local storm report, Dec 27, 2:22 PM CST, 43 minutes before

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Local storm report, Dec 27, 2:23 PM CST, 42 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, Dec 27, 2:38 PM CST, 27 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
Dec 26, 7:39 PM CST	Special Weather Statement	LSX	Crawford, Franklin, Gasconade	51 min
Dec 26, 7:59 PM CST	River Flood Warning	LSX	Boone, Callaway, Cole, Moniteau	6 days
Dec 26, 7:59 PM CST	River Flood Warning	LSX	Cole	5 days
Dec 26, 8:29 PM CST	Special Weather Statement	LSX	Jefferson, Saint Charles, Saint Louis	46 min
Dec 26, 10:26 PM CST	Flash Flood Warning	LSX	Audrain, Boone, Callaway, Cole, Moniteau, Monroe and 1 more	8 hr
Dec 27, 2:06 AM CST	River Flood Warning	LSX	Lewis	5 days
Dec 27, 2:06 AM CST	River Flood Warning	LSX	Marion	4 days
Dec 27, 2:06 AM CST	River Flood Warning	LSX	Lewis	5 days
Dec 27, 2:06 AM CST	River Flood Warning	LSX	Marion	5 days
Dec 27, 2:06 AM CST	River Flood Warning	LSX	Monroe	5 days
Dec 27, 3:17 AM CST	Areal Flood Warning	LSX	Audrain, Boone, Callaway, Cole, Crawford, Franklin and 11 more	12 hr
Dec 27, 3:55 PM CST	Wind Advisory	LSX	Audrain, Boone, Callaway, Knox, Lewis, Lincoln and 10 more	23 hr
Dec 27, 3:59 PM CST	Winter Weather Advisory	LSX	Knox, Lewis	16 hr
Dec 27, 2:16 AM CST	River Flood Warning	LSX	Brown	8 days

Nearby

Areal Flood Warnings in Missouri, 2015 Areal Flood Warnings in Illinois, 2015 Every areal flood warning in 2015

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.