Alert archive / Illinois / Areal Flood Warnings in 2015

Areal Flood Warning 16, NWS St. Louis, MO

June 19, 20158 counties in Illinois

NWS St. Louis, MO issued this areal flood warning at Jun 19, 2015, 4:37 PM CDT for 8 counties in Illinois. It was in force for 12 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, 4:37 PM CDT (21:37 UTC)
Expired: Jun 20, 2015, 4:30 AM CDT
In force: 12 hr
Issued by: NWS St. Louis, MO
Area: Storm-based polygon
Flood severity: None

Counties Bond County, IL, Clinton County, IL, Fayette County, IL, Marion County, IL, Monroe County, IL, Randolph County, IL, Saint Clair County, IL, Washington County, IL

The radar

The St Louis radar (KLSX), 103 km from the middle of the area, began a volume at 21:38 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, 9.6 hours before the alert went out and 196 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, 1 minute earlier.

Area forecast discussion, Jun 19, 4:36 PM CDT, 1 minute before

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Hazardous weather outlook, Jun 19, 4:39 AM CDT, 11 hours 58 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE ST LOUIS MO
439 AM CDT FRI JUN 19 2015

ILZ058>060-064-065-069-070-074-079-095>102-MOZ018-019-026-027-
034>036-041-042-047>052-059>065-072>075-084-085-099-200945-
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-ST. 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-ST. CHARLES MO-FRANKLIN MO-
ST. LOUIS MO-ST. LOUIS CITY MO-JEFFERSON MO-CRAWFORD MO-
WASHINGTON MO-ST. FRANCOIS MO-STE. GENEVIEVE MO-IRON MO-
MADISON MO-REYNOLDS MO-
439 AM CDT FRI JUN 19 2015

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

SHOWERS AND ISOLATED THUNDERSTORMS ARE LIKELY ACROSS PARTS OF THE
AREA...ESPECIALLY THE SOUTHERN HALF OF MISSOURI AND ILLINOIS.
LOCALLY HEAVY RAINFALL WILL BE POSSIBLE. A FLASH FLOOD WATCH
REMAINS IN EFFECT. PLEASE REFER TO THE WATCH FOR FURTHER
INFORMATION.

.DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY

SEVERAL POINTS ON THE MERAMEC...ILLINOIS AND MISSISSIPPI RIVERS
WILL BE RISING TO MAJOR FLOOD LEVELS THIS WEEKEND DUE TO THE
EXPECTED RAINFALL.

THERE IS A CHANCE OF THUNDERSTORMS FROM SATURDAY NIGHT THROUGH THURSDAY
ACROSS PORTIONS OF THE AREA.

A FEW STORMS MAY BE STRONG TO SEVERE ON SATURDAY NIGHT AND SUNDAY
AFTERNOON/EVENING WITH DAMAGING WINDS AND LARGE HAIL THE PRIMARY THREATS.

HOT AND HUMID WEATHER IS EXPECTED BEGINNING ON SUNDAY AND LASTING
THROUGH THURSDAY WITH HEAT INDEX VALUES FOR PORTIONS OF THE AREA
REACHING BETWEEN 100 AND 105 EACH AFTERNOON.

.SPOTTER INFORMATION STATEMENT...

SPOTTERS ARE ENCOURAGED TO CONTACT THE NATIONAL WEATHER SERVICE
TO REPORT RAINFALL AMOUNTS IN EXCESS OF AN INCH AS WELL AS ANY
FLOODING.

GOSSELIN

In the hours before

Local storm report, Jun 19, 11:52 AM CDT, 4 hours 45 minutes before

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Local storm report, Jun 19, 12:02 PM CDT, 4 hours 35 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, 3 hours 23 minutes before

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Local storm report, Jun 19, 1:42 PM CDT, 2 hours 55 minutes before

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Local storm report, Jun 19, 2:06 PM CDT, 2 hours 31 minutes before

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Local storm report, Jun 19, 4:16 PM CDT, 21 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, 5:30 PM CDT	Areal Flood Warning	LSX	Washington	11 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

Nearby

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.