Alert archive / Missouri / Special Weather Statements in 2018

Special Weather Statement, NWS St. Louis, MO

June 15, 2018Sainte Genevieve County, Saint Francois County, Missouri

NWS St. Louis, MO issued this special weather statement at Jun 15, 2018, 4:28 PM CDT for Sainte Genevieve County, Saint Francois County, Missouri. It was in force for 47 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: Jun 15, 2018, 4:28 PM CDT (21:28 UTC)
Expired: Jun 15, 2018, 5:15 PM CDT
In force: 47 min
Issued by: NWS St. Louis, MO

Counties Saint Francois County, MO, Sainte Genevieve County, MO

The radar

The St Louis radar (KLSX), 99 km from the middle of the area, began a volume at 21:31 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, 9.5 hours before the alert went out and 321 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: 1406 J/kg
Mixed-layer CIN: -92 J/kg
Mixed-layer LCL: 1257 m above ground
0-6 km bulk shear: 4 kt
0-1 km storm-relative helicity: -48 m²/s²
0-3 km storm-relative helicity: -14 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 Jun 15, 3:45 PM CDT, 43 minutes earlier.

Area forecast discussion, Jun 15, 3:45 PM CDT, 43 minutes before

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Hazardous weather outlook, Jun 15, 3:56 PM CDT, 32 minutes before

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In the hours before

Special weather statement, Jun 15, 3:07 PM CDT, 1 hour 21 minutes before

Special Weather Statement
National Weather Service St Louis MO
307 PM CDT FRI JUN 15 2018

MOZ084-085-152045-
Madison MO-Iron MO-
307 PM CDT FRI JUN 15 2018

...SIGNIFICANT WEATHER ADVISORY FOR EAST CENTRAL IRON AND WESTERN
MADISON COUNTIES IN SOUTHEASTERN MISSOURI UNTIL 345 PM CDT...

At 306 PM CDT, Doppler radar was tracking a strong thunderstorm over
Saco, moving northwest at 10 mph.

Nickel size hail and wind gusts of 50 to 55 mph will be possible with
this storm.

Locations impacted include...
Saco, Glover and Chloride.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Torrential rainfall is also occurring with this storm, and may lead
to localized flooding. Do not drive your vehicle through flooded
roadways.

Frequent cloud to ground lightning is occurring with this storm.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.

This storm may intensify, so be certain to monitor local radio
stations and available television stations for additional information
and possible warnings from the National Weather Service.

&&

LAT...LON 3749 9073 3762 9044 3733 9030 3731 9034
      3732 9055 3730 9055
TIME...MOT...LOC 2006Z 151DEG 11KT 3736 9045

Carney

Special weather statement, Jun 15, 4:28 PM CDT, 0 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 14, 7:23 PM CDT	Severe Thunderstorm Warning	LSX	Jefferson, Sainte Genevieve, Saint Francois	52 min
Jun 15, 3:53 AM CDT	Excessive Heat Warning	LSX	Jefferson, Saint Charles, Saint Louis, City of Saint Louis	5 days
Jun 15, 3:53 AM CDT	Heat Advisory	LSX	Audrain, Boone, Callaway, Cole, Crawford, Franklin and 19 more	5 days
Jun 15, 3:07 PM CDT	Special Weather Statement	LSX	Madison	38 min
Jun 15, 3:13 PM CDT	Severe Thunderstorm Warning	LSX	Iron, Madison	31 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.