Alert archive / Missouri / Special Weather Statements in 2019

Special Weather Statement, NWS St. Louis, MO

September 8, 20196 counties in Missouri

NWS St. Louis, MO issued this special weather statement at Sep 8, 2019, 2:52 AM CDT for 6 counties in Missouri. It was in force for 53 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: Sep 8, 2019, 2:52 AM CDT (07:52 UTC)
Expired: Sep 8, 2019, 3:45 AM CDT
In force: 53 min
Issued by: NWS St. Louis, MO

Counties Audrain County, MO, Boone County, MO, Marion County, MO, Monroe County, MO, Ralls County, MO, Shelby County, MO

The radar

The St Louis radar (KLSX), 131 km from the middle of the area, began a volume at 07:53 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, 7.9 hours before the alert went out and 296 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: 1509 m above ground
0-6 km bulk shear: 39 kt
0-1 km storm-relative helicity: 0 m²/s²
0-3 km storm-relative helicity: 45 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 Sep 7, 10:34 PM CDT, 4 hours 18 minutes earlier.

Area forecast discussion, Sep 7, 10:34 PM CDT, 4 hours 18 minutes before

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Hazardous weather outlook, Sep 7, 3:12 PM CDT, 11 hours 40 minutes before

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In the hours before

Special weather statement, Sep 8, 2:52 AM CDT, 0 minutes before

Special Weather Statement
National Weather Service St Louis MO
252 AM CDT Sun Sep 8 2019

ILZ095-097-MOZ018-019-026-027-034-035-041-042-050-080845-
Adams IL-Pike IL-Marion MO-Audrain MO-Monroe MO-Ralls MO-Knox MO-
Boone MO-Callaway MO-Lewis MO-Shelby MO-
252 AM CDT Sun Sep 8 2019

...SIGNIFICANT WEATHER ADVISORY FOR NORTHWESTERN PIKE AND SOUTHERN
ADAMS COUNTIES IN WEST CENTRAL ILLINOIS...SOUTHEASTERN KNOX AND RALLS
COUNTIES IN NORTHEASTERN MISSOURI...BOONE AND AUDRAIN COUNTIES IN
CENTRAL MISSOURI...MARION AND SHELBY COUNTIES IN NORTHEASTERN
MISSOURI...NORTHWESTERN CALLAWAY COUNTY IN CENTRAL MISSOURI...
SOUTHERN LEWIS AND MONROE COUNTIES IN NORTHEASTERN MISSOURI UNTIL 345
AM CDT...

At 251 AM CDT, Doppler radar was tracking strong thunderstorms along
a line extending from near Plevna to Cairo to near Glasgow. Movement
was east at 40 mph.

Winds in excess of 40 mph will be possible with these storms.

Locations impacted include...
Columbia, Quincy, Hannibal, Mexico, Centralia, Palmyra, Monroe City,
Shelbina, Paris, Santa Fe, Warren, Hallsville, Payson, New London,
Sturgeon, Clarence, Perry, La Belle, Madison and Shelbyville.

This includes the following highways...
 Interstate 172 between exits 2 and 15.
 Interstate 72 between exits 4 and 10.
 Interstate 70 in Missouri between exits 115 and 137.

This also includes Rock Bridge State Park, Finger Lakes State Park,
Union Covered Bridge Historic Site, Jewell Cemetery Historic Site,
and Mark Twain Lake Recreational Area.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3988 9104 3950 9136 3945 9146 3940 9145
      3928 9155 3881 9230 3888 9248 3891 9248
      3898 9257 3924 9243 3925 9231 3983 9229
      4014 9203
TIME...MOT...LOC 0751Z 288DEG 36KT 3994 9210 3953 9247 3930 9289

Kanofsky

The office that day

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

Issued	Product	Office	Counties	Lasted
Sep 8, 4:10 AM CDT	Special Weather Statement	LSX	Pike	65 min
Sep 8, 6:36 AM CDT	Special Weather Statement	LSX	Montgomery, Warren	39 min
Sep 8, 6:46 AM CDT	Severe Thunderstorm Warning	LSX	Lincoln, Montgomery, Saint Charles, Warren	44 min
Sep 8, 7:28 AM CDT	Special Weather Statement	LSX	Saint Charles	47 min
Sep 8, 7:36 AM CDT	Areal Flood Advisory	LSX	Boone, Callaway, Cole, Moniteau, Osage	3 hr
Sep 8, 8:09 AM CDT	Special Weather Statement	LSX	Jefferson, City of Saint Louis	66 min
Sep 8, 4:55 AM CDT	Special Weather Statement	LSX	Macoupin	50 min

Nearby

Special Weather Statements in Missouri, 2019 Every special weather statement in 2019

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.