Alert archive / Missouri / Special Weather Statements in 2016

Special Weather Statement, NWS St. Louis, MO

July 25, 2016Lincoln County, Saint Charles County, Missouri; Calhoun County, Illinois

NWS St. Louis, MO issued this special weather statement at Jul 25, 2016, 2:27 AM CDT for Lincoln County, Saint Charles County, Missouri; Calhoun County, Illinois. It was in force for 48 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Jul 25, 2016, 2:27 AM CDT (07:27 UTC)
Expired: Jul 25, 2016, 3:15 AM CDT
In force: 48 min
Issued by: NWS St. Louis, MO

Counties Calhoun County, IL, Lincoln County, MO, Saint Charles County, MO

The radar

The St Louis radar (KLSX), 21 km from the middle of the area, began a volume at 07:29 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, 7.5 hours before the alert went out and 240 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: 4298 J/kg
Mixed-layer CIN: -6 J/kg
Mixed-layer LCL: 1138 m above ground
0-6 km bulk shear: 18 kt
0-1 km storm-relative helicity: 81 m²/s²
0-3 km storm-relative helicity: 112 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

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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
Jul 24, 11:31 PM CDT	Special Weather Statement	LSX	Boone, Cole, Moniteau	59 min
Jul 25, 1:23 AM CDT	Flash Flood Warning	LSX	Callaway, Cole, Gasconade, Osage	6 hr
Jul 25, 1:50 AM CDT	Special Weather Statement	LSX	Lincoln, Saint Charles, Warren	40 min
Jul 25, 2:51 AM CDT	Areal Flood Advisory	LSX	Jefferson, Saint Charles, Saint Louis, City of Saint Louis	6 hr
Jul 24, 11:28 PM CDT	Flash Flood Warning	LSX	Greene, Macoupin	7 hr
Jul 25, 3:27 AM CDT	Special Weather Statement	LSX	Jersey, Macoupin, Madison, Montgomery	48 min

Nearby

Special Weather Statements in Missouri, 2016 Special Weather Statements in Illinois, 2016 Every special weather statement in 2016

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.