Alert archive / Missouri / Areal Flood Warnings in 2015

Areal Flood Warning 17, NWS St. Louis, MO

June 19, 2015Washington County, Missouri

NWS St. Louis, MO issued this areal flood warning at Jun 19, 2015, 5:30 PM CDT for Washington County, Missouri. It was in force for 11 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: Jun 19, 2015, 5:30 PM CDT (22:30 UTC)
Expired: Jun 20, 2015, 4:30 AM CDT
In force: 11 hr
Issued by: NWS St. Louis, MO
Area: Storm-based polygon
Flood severity: None

County Washington County, MO

The radar

The St Louis radar (KLSX), 84 km from the middle of the area, began a volume at 22:32 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, 10.5 hours before the alert went out and 313 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 938 m above ground
0-6 km bulk shear: 14 kt
0-1 km storm-relative helicity: -42 m²/s²
0-3 km storm-relative helicity: 1 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 Jun 19, 4:36 PM CDT, 54 minutes earlier.

Area forecast discussion, Jun 19, 4:36 PM CDT, 54 minutes before

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Hazardous weather outlook, Jun 19, 4:43 PM CDT, 47 minutes before

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In the hours before

Local storm report, Jun 19, 11:52 AM CDT, 5 hours 38 minutes before

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Local storm report, Jun 19, 12:02 PM CDT, 5 hours 28 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE ST LOUIS MO
1202 PM CDT FRI JUN 19 2015

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

1159 AM     FLOOD            MAPLEWOOD               38.61N 90.32W
06/19/2015                   ST. LOUIS          MO   PUBLIC

            STREET FLOODING.

&&

BRITT

Local storm report, Jun 19, 1:14 PM CDT, 4 hours 16 minutes before

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Local storm report, Jun 19, 1:42 PM CDT, 3 hours 48 minutes before

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Local storm report, Jun 19, 2:06 PM CDT, 3 hours 24 minutes before

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Local storm report, Jun 19, 4:16 PM CDT, 1 hour 14 minutes before

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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
Jun 18, 10:14 PM CDT	River Flood Warning	LSX	Lincoln	42 hr
Jun 18, 11:24 PM CDT	Areal Flood Advisory	LSX	Lincoln, Montgomery, Pike, Warren	8 hr
Jun 19, 1:09 AM CDT	Flash Flood Warning	LSX	Lincoln, Montgomery, Pike, Warren	7 hr
Jun 19, 3:41 AM CDT	Flash Flood Warning	LSX	Crawford	6 hr
Jun 19, 7:36 AM CDT	Areal Flood Advisory	LSX	Franklin, Jefferson, Saint Charles, Saint Louis, City of Saint Louis	6 hr
Jun 19, 7:53 AM CDT	Areal Flood Warning	LSX	Lincoln, Montgomery, Pike, Warren	6 hr
Jun 19, 9:39 AM CDT	Areal Flood Warning	LSX	Crawford	10 hr
Jun 19, 10:20 AM CDT	Flash Flood Warning	LSX	Franklin, Gasconade, Osage	6 hr
Jun 19, 10:34 AM CDT	Flash Flood Warning	LSX	Jefferson, Saint Charles, Saint Louis, City of Saint Louis	6 hr
Jun 19, 2:32 PM CDT	Flash Flood Warning	LSX	Sainte Genevieve, Saint Francois	6 hr
Jun 19, 4:02 PM CDT	Areal Flood Warning	LSX	Franklin, Gasconade, Osage	12 hr
Jun 19, 9:07 AM CDT	Flash Flood Warning	LSX	Monroe, Randolph, Saint Clair	6 hr
Jun 19, 10:45 AM CDT	Flash Flood Warning	LSX	Bond, Clinton, Fayette, Madison, Marion, Montgomery and 2 more	6 hr
Jun 19, 1:00 PM CDT	River Flood Warning	LSX	Fayette	5 days
Jun 19, 2:44 PM CDT	Flash Flood Warning	LSX	Randolph	6 hr
Jun 19, 4:37 PM CDT	Areal Flood Warning	LSX	Bond, Clinton, Fayette, Marion, Monroe, Randolph and 2 more	12 hr

Nearby

Areal Flood Warnings in Missouri, 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.