Alert archive / Missouri / Areal Flood Advisories in 2017

Areal Flood Advisory 3, NWS St. Louis, MO

April 5, 2017Saint Louis County, City of Saint Louis, Missouri

NWS St. Louis, MO issued this areal flood advisory at Apr 5, 2017, 6:11 PM CDT for Saint Louis County, City of Saint Louis, Missouri. It was in force for 3 hr.

The area

The counties it named.

The facts

Issued
Apr 5, 2017, 6:11 PM CDT (23:11 UTC)
Expired
Apr 5, 2017, 9:15 PM CDT
In force
3 hr
Issued by
NWS St. Louis, MO
Area
Storm-based polygon

Counties City of Saint Louis, MO, Saint Louis County, MO

The radar

The St Louis radar (KLSX), 32 km from the middle of the area, began a volume at 23:14 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.

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, 3:12 PM CDT, 2 hours 59 minutes earlier.

Area forecast discussion, Apr 5, 3:12 PM CDT, 2 hours 59 minutes before
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Hazardous weather outlook, Apr 5, 3:14 PM CDT, 2 hours 57 minutes before
Hazardous Weather Outlook
National Weather Service Saint Louis MO
314 PM 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>075-084-085-099-061200-
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-
314 PM 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...Tonight

Isolated severe thunderstorms are possible late this afternoon
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 is possible late this afternoon across
southwest Illinois.

Kanofsky

In the hours before

Special weather statement, Apr 5, 4:44 PM CDT, 1 hour 27 minutes before
Special Weather Statement
National Weather Service St Louis MO
444 PM CDT WED APR 5 2017

ILZ100-101-MOZ061-063-064-052230-
St. Clair IL-Madison IL-St. Louis MO-St. Charles MO-
St. Louis City MO-
444 PM CDT WED APR 5 2017

...SIGNIFICANT WEATHER ADVISORY FOR WESTERN MADISON AND NORTHERN ST.
CLAIR COUNTIES IN SOUTHWESTERN ILLINOIS...EAST CENTRAL ST. CHARLES
AND NORTHEASTERN ST. LOUIS COUNTIES IN EAST CENTRAL MISSOURI AND
NORTHEASTERN ST. LOUIS CITY UNTIL 530 PM CDT...

At 444 PM CDT, Doppler radar was tracking strong thunderstorms along
a line extending from Black Jack to Millstadt. Movement was northeast
at 25 mph.

Half inch hail and winds in excess of 45 mph will be possible with
these storms.

Locations impacted include...
St. Louis, Florissant, Belleville, Granite City, O'Fallon, Alton,
East St. Louis, Hazelwood, Collinsville, Edwardsville, Ferguson,
Godfrey, Fairview Heights, Overland, Cahokia, Jennings, Swansea, St.
Ann, Glen Carbon and Shiloh.

This includes Interstate 64 in Illinois between exits 9 and 19.

This also includes  Scott Joplin Historic Site, Confluence State
Park, and Horseshoe Lake State Park.

LAT...LON 3859 8979 3840 9013 3842 9014 3846 9018
      3864 9023 3871 9040 3900 9010 3900 9007
TIME...MOT...LOC 2144Z 225DEG 22KT 3880 9028 3848 9010

KD

The office that day

Everything else NWS St. Louis, MO issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Apr 4, 10:55 PM CDTSevere Thunderstorm WarningLSXCrawford50 min
Apr 4, 11:30 PM CDTSevere Thunderstorm WarningLSXCrawford, Franklin, Iron, Washington45 min
Apr 5, 12:20 AM CDTSevere Thunderstorm WarningLSXFranklin, Jefferson, Sainte Genevieve, Saint Francois, Saint Louis, Washington and 1 more40 min
Apr 5, 1:27 AM CDTSevere Thunderstorm WarningLSXMadison, Sainte Genevieve, Saint Francois25 min
Apr 5, 2:18 AM CDTFlash Flood WarningLSXCrawford, Iron, Washington6 hr
Apr 5, 5:26 AM CDTAreal Flood AdvisoryLSXSaint Louis4 hr
Apr 5, 8:09 AM CDTAreal Flood WarningLSXCrawford3 hr
Apr 5, 9:51 AM CDTRiver Flood WarningLSXCallaway, Osage6 days
Apr 5, 9:51 AM CDTRiver Flood WarningLSXGasconade, Montgomery6 days
Apr 5, 9:51 AM CDTRiver Flood WarningLSXGasconade, Montgomery5 days
Apr 5, 9:51 AM CDTRiver Flood WarningLSXBoone, Callaway, Cole, Moniteau4 days
Apr 5, 10:07 AM CDTRiver Flood WarningLSXLewis3 days
Apr 5, 11:24 AM CDTRiver Flood WarningLSXLewis8 days
Apr 5, 11:24 AM CDTRiver Flood WarningLSXMarion8 days
Apr 5, 11:24 AM CDTRiver Flood WarningLSXRalls5 days
Apr 5, 11:24 AM CDTRiver Flood WarningLSXPike7 days
Apr 5, 11:24 AM CDTRiver Flood WarningLSXPike9 days
Apr 5, 11:24 AM CDTRiver Flood WarningLSXLincoln7 days
Apr 5, 11:24 AM CDTRiver Flood WarningLSXSaint Charles11 days
Apr 5, 11:24 AM CDTRiver Flood WarningLSXSaint Charles7 days
Apr 5, 11:24 AM CDTRiver Flood WarningLSXPerry, Sainte Genevieve10 days
Apr 5, 1:51 PM CDTRiver Flood WarningLSXLincoln37 hr
Apr 5, 4:44 PM CDTSpecial Weather StatementLSXCity of Saint Louis46 min
Apr 5, 2:06 AM CDTSevere Thunderstorm WarningLSXRandolph24 min
Apr 5, 4:51 AM CDTAreal Flood AdvisoryLSXGreene, Macoupin4 hr
Apr 5, 11:46 AM CDTRiver Flood WarningLSXBrown16 days
Apr 5, 11:46 AM CDTRiver Flood WarningLSXMorgan, Pike15 days
Apr 5, 11:46 AM CDTRiver Flood WarningLSXPike, Scott19 days

Nearby

Areal Flood Advisories in Missouri, 2017Every 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; radar from the NEXRAD Level II archive.