Alert archive / Missouri / Special Weather Statements in 2018

Special Weather Statement, NWS St. Louis, MO

July 16, 2018Saint Francois County, Missouri

NWS St. Louis, MO issued this special weather statement at Jul 16, 2018, 3:33 PM CDT for Saint Francois County, Missouri. It was in force for 27 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 16, 2018, 3:33 PM CDT (20:33 UTC)
Expired: Jul 16, 2018, 4:00 PM CDT
In force: 27 min
Issued by: NWS St. Louis, MO

County Saint Francois County, MO

The radar

The St Louis radar (KLSX), 107 km from the middle of the area, began a volume at 20:33 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

Springfield, MO (KSGF), launched 12:00Z, 8.6 hours before the alert went out and 301 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: 750 J/kg
Mixed-layer CIN: -72 J/kg
Mixed-layer LCL: 1347 m above ground
0-6 km bulk shear: 9 kt
0-1 km storm-relative helicity: 21 m²/s²
0-3 km storm-relative helicity: -4 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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What forecasters said that day

The local office's own words before this special weather statement 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 special weather statement went out at Jul 15, 6:45 PM CDT, 20 hours 48 minutes earlier.

Area forecast discussion, Jul 15, 6:45 PM CDT, 20 hours 48 minutes before

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Hazardous weather outlook, Jul 15, 3:48 PM CDT, 23 hours 45 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
Jul 16, 4:12 PM CDT	Special Weather Statement	LSX	Reynolds	33 min
Jul 16, 5:16 PM CDT	Special Weather Statement	LSX	Madison	29 min
Jul 16, 1:53 PM CDT	Special Weather Statement	LSX	Washington	37 min
Jul 16, 5:54 PM CDT	Special Weather Statement	LSX	Fayette	36 min

Nearby

Special Weather Statements in Missouri, 2018 Every special weather statement in 2018

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.