Alert archive / Missouri / Areal Flood Advisories in 2017

Areal Flood Advisory 2, NWS St. Louis, MO

April 5, 2017Saint Louis County, Missouri

NWS St. Louis, MO issued this areal flood advisory at Apr 5, 2017, 5:26 AM CDT for Saint Louis County, Missouri. It was in force for 4 hr.

The area

The counties it named.

The facts

Issued: Apr 5, 2017, 5:26 AM CDT (10:26 UTC)
Expired: Apr 5, 2017, 9:30 AM CDT
In force: 4 hr
Issued by: NWS St. Louis, MO
Area: Storm-based polygon

County Saint Louis County, MO

The radar

The St Louis radar (KLSX), 22 km from the middle of the area, began a volume at 10:27 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, 10.4 hours before the alert went out and 231 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: 868 m above ground
0-6 km bulk shear: 58 kt
0-1 km storm-relative helicity: 22 m²/s²
0-3 km storm-relative helicity: 75 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 advisory 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 advisory went out at Apr 5, 3:29 AM CDT, 1 hour 57 minutes earlier.

Area forecast discussion, Apr 5, 3:29 AM CDT, 1 hour 57 minutes before

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Hazardous weather outlook, Apr 5, 4:26 AM CDT, 1 hour before

Hazardous Weather Outlook
National Weather Service Saint Louis MO
426 AM CDT Wed Apr 5 2017

ILZ058>060-064-065-069-070-074-079-095>102-MOZ018-019-026-027-
034>036-041-042-047>052-059>065-072>075-084-085-099-060930-
Greene IL-Macoupin IL-Montgomery IL-Bond IL-Fayette IL-Clinton IL-
Marion IL-Washington IL-Randolph IL-Adams IL-Brown IL-Pike IL-
Calhoun IL-Jersey IL-Madison IL-Saint Clair IL-Monroe IL-Knox MO-
Lewis MO-Shelby MO-Marion MO-Monroe MO-Ralls MO-Pike MO-Boone MO-
Audrain MO-Moniteau MO-Cole MO-Osage MO-Callaway MO-Montgomery MO-
Lincoln MO-Gasconade MO-Warren MO-Saint Charles MO-Franklin MO-
Saint Louis MO-Saint Louis City MO-Jefferson MO-Crawford MO-
Washington MO-Saint Francois MO-Sainte Genevieve MO-Iron MO-
Madison MO-Reynolds MO-
426 AM CDT Wed Apr 5 2017

This hazardous weather outlook is for portions of eastern and
central Missouri as well as west central and southwest Illinois.

.DAY ONE...Today and Tonight

Isolated severe thunderstorms are possible today across southwest
Illinois.  The primary threats will be damaging winds and large
hail.

.DAYS TWO THROUGH SEVEN...Thursday through Tuesday

No hazardous weather is expected at this time.

.SPOTTER INFORMATION STATEMENT...

Spotter activation may be needed today. Spotters are encouraged
to report any severe weather, if observed, to the National Weather
Service.

GKS

In the hours before

Local storm report, Apr 4, 11:35 PM CDT, 5 hours 51 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE ST LOUIS MO
1135 PM CDT TUE APR 04 2017

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

1117 PM     HAIL             CUBA                    38.06N  91.40W
04/04/2017  E0.88 INCH       CRAWFORD           MO   EMERGENCY MNGR

&&

EVENT NUMBER LSX1700355

GKS

Local storm report, Apr 4, 11:52 PM CDT, 5 hours 34 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE ST LOUIS MO
1152 PM CDT TUE APR 04 2017

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

1151 PM     HAIL             SULLIVAN                38.22N  91.17W
04/04/2017  E0.25 INCH       FRANKLIN           MO   TRAINED SPOTTER

&&

EVENT NUMBER LSX1700356

GKS

Local storm report, Apr 5, 12:40 AM CDT, 4 hours 46 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE ST LOUIS MO
1240 AM CDT WED APR 5 2017

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

1232 AM     HAIL             3 SE HEMATITE           38.17N 90.45W
04/05/2017  E0.75 INCH       JEFFERSON          MO   TRAINED SPOTTER

            PEA TO DIME SIZE HAIL.

&&

MAB

Local storm report, Apr 5, 12:48 AM CDT, 4 hours 38 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE ST LOUIS MO
1248 AM CDT WED APR 5 2017

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

1235 AM     HAIL             2 NE HEMATITE           38.22N 90.45W
04/05/2017  M1.00 INCH       JEFFERSON          MO   TRAINED SPOTTER

&&

MAB

Local storm report, Apr 5, 1:05 AM CDT, 4 hours 21 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE ST LOUIS MO
105 AM CDT WED APR 5 2017

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

0100 AM     HAIL             WATERLOO                38.34N 90.16W
04/05/2017  E0.25 INCH       MONROE             IL   EMERGENCY MNGR

&&

MAB

Local storm report, Apr 5, 1:55 AM CDT, 3 hours 31 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
Apr 4, 10:55 PM CDT	Severe Thunderstorm Warning	LSX	Crawford	50 min
Apr 4, 11:30 PM CDT	Severe Thunderstorm Warning	LSX	Crawford, Franklin, Iron, Washington	45 min
Apr 5, 12:20 AM CDT	Severe Thunderstorm Warning	LSX	Franklin, Jefferson, Sainte Genevieve, Saint Francois, Saint Louis, Washington and 1 more	40 min
Apr 5, 1:27 AM CDT	Severe Thunderstorm Warning	LSX	Madison, Sainte Genevieve, Saint Francois	25 min
Apr 5, 2:18 AM CDT	Flash Flood Warning	LSX	Crawford, Iron, Washington	6 hr
Apr 5, 8:09 AM CDT	Areal Flood Warning	LSX	Crawford	3 hr
Apr 5, 9:51 AM CDT	River Flood Warning	LSX	Callaway, Osage	6 days
Apr 5, 9:51 AM CDT	River Flood Warning	LSX	Gasconade, Montgomery	6 days
Apr 5, 9:51 AM CDT	River Flood Warning	LSX	Gasconade, Montgomery	5 days
Apr 5, 9:51 AM CDT	River Flood Warning	LSX	Boone, Callaway, Cole, Moniteau	4 days
Apr 5, 10:07 AM CDT	River Flood Warning	LSX	Lewis	3 days
Apr 5, 11:24 AM CDT	River Flood Warning	LSX	Lewis	8 days
Apr 5, 11:24 AM CDT	River Flood Warning	LSX	Marion	8 days
Apr 5, 11:24 AM CDT	River Flood Warning	LSX	Ralls	5 days
Apr 5, 11:24 AM CDT	River Flood Warning	LSX	Pike	7 days
Apr 5, 11:24 AM CDT	River Flood Warning	LSX	Pike	9 days
Apr 5, 11:24 AM CDT	River Flood Warning	LSX	Lincoln	7 days
Apr 5, 11:24 AM CDT	River Flood Warning	LSX	Saint Charles	11 days
Apr 5, 11:24 AM CDT	River Flood Warning	LSX	Saint Charles	7 days
Apr 5, 11:24 AM CDT	River Flood Warning	LSX	Perry, Sainte Genevieve	10 days
Apr 5, 1:51 PM CDT	River Flood Warning	LSX	Lincoln	37 hr
Apr 5, 4:44 PM CDT	Special Weather Statement	LSX	City of Saint Louis	46 min
Apr 5, 6:11 PM CDT	Areal Flood Advisory	LSX	Saint Louis, City of Saint Louis	3 hr
Apr 5, 2:06 AM CDT	Severe Thunderstorm Warning	LSX	Randolph	24 min
Apr 5, 4:51 AM CDT	Areal Flood Advisory	LSX	Greene, Macoupin	4 hr
Apr 5, 11:46 AM CDT	River Flood Warning	LSX	Brown	16 days
Apr 5, 11:46 AM CDT	River Flood Warning	LSX	Morgan, Pike	15 days
Apr 5, 11:46 AM CDT	River Flood Warning	LSX	Pike, Scott	19 days

Nearby

Areal Flood Advisories in Missouri, 2017 Every areal flood advisory in 2017

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.