Alert archive / Missouri / Special Weather Statements in 2018

Special Weather Statement, NWS St. Louis, MO

January 21, 2018Pike County, Missouri

NWS St. Louis, MO issued this special weather statement at Jan 21, 2018, 11:08 PM CST for Pike County, Missouri. It was in force for 52 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: Jan 21, 2018, 11:08 PM CST (05:08 UTC)
Expired: Jan 22, 2018, 12:00 AM CST
In force: 52 min
Issued by: NWS St. Louis, MO

County Pike County, MO

The radar

The St Louis radar (KLSX), 92 km from the middle of the area, began a volume at 05:09 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 00:00Z, 5.1 hours before the alert went out and 340 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: 87 J/kg
Mixed-layer CIN: -13 J/kg
Mixed-layer LCL: 971 m above ground
0-6 km bulk shear: 55 kt
0-1 km storm-relative helicity: 232 m²/s²
0-3 km storm-relative helicity: 257 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.1

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 Jan 21, 9:20 PM CST, 1 hour 48 minutes earlier.

Area forecast discussion, Jan 21, 9:20 PM CST, 1 hour 48 minutes before

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<html lang="en">
<head>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width, initial-scale=1">
  <title>Service Notice</title>
  <link rel="stylesheet" href="index.css">
</head>
<body>
  <main class="wrap">
    <section class="card" role="status" aria-live="polite">
      <div class="status" id="status">Temporary Notice</div>
      <h1 id="headline">This service is currently unavailable.</h1>
      <p id="message1">
        The site you requested is temporarily down for maintenance or an unexpected outage.
      </p>
      <p id="message2">
        Please try again in a few minutes.
      </p>
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        If you are an administrator, restore upstream service and remove the redirect/fallback rule when normal operations resume.
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Hazardous weather outlook, Jan 21, 6:44 PM CST, 4 hours 24 minutes before

Hazardous Weather Outlook
National Weather Service Saint Louis MO
644 PM CST Sun Jan 21 2018

ILZ058>060-064-065-069-070-074-079-095>102-MOZ018-019-026-027-
034>036-041-042-047>052-059>065-072>075-084-085-099-221200-
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-
644 PM CST Sun Jan 21 2018

This hazardous weather outlook is for portions of eastern and
central Missouri as well as west central and southwest Illinois.

.DAY ONE...Tonight

Isolated strong thunderstorms are possible over parts of central
and southeast Missouri. The main threat will be gusty winds to 50
mph.

.DAYS TWO THROUGH SEVEN...Monday through Saturday

Isolated strong to severe thunderstorms are possible over parts
of central and southwest Illinois during the day on Monday. Hail
and locally damaging winds are the main threats.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not anticipated tonight.

TES

In the hours before

Special weather statement, Jan 21, 9:26 PM CST, 1 hour 42 minutes before

Special Weather Statement
National Weather Service St Louis MO
926 PM CST SUN JAN 21 2018

MOZ047-048-220415-
Moniteau MO-Cole MO-
926 PM CST SUN JAN 21 2018

...SIGNIFICANT WEATHER ADVISORY FOR COLE AND SOUTHEASTERN MONITEAU
COUNTIES UNTIL 1015 PM CST...

At 926 PM CST, Doppler radar was tracking a strong thunderstorm near
Eldon, moving northeast at 40 mph.

Winds in excess of 40 mph will be possible with this storm.

Locations impacted include...
Jefferson City, Wardsville, St. Martins, Russellville, Centertown,
High Point, Brazito, McGirk, Hickory Hill, Lohman, Eugene, Elston and
Enon.

This also includes  Jefferson Landing Historic Site.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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 3870 9241 3855 9210 3834 9237 3834 9241
      3843 9241 3843 9262 3846 9266
TIME...MOT...LOC 0326Z 217DEG 37KT 3842 9257

Byrd

Special weather statement, Jan 21, 11:08 PM CST, 0 minutes before

Special Weather Statement
National Weather Service St Louis MO
1108 PM CST SUN JAN 21 2018

MOZ036-042-220600-
Pike MO-Audrain MO-
1108 PM CST SUN JAN 21 2018

...SIGNIFICANT WEATHER ADVISORY FOR EAST CENTRAL AUDRAIN COUNTY IN
CENTRAL MISSOURI AND WEST CENTRAL PIKE COUNTIES IN NORTHEASTERN
MISSOURI UNTIL MIDNIGHT CST...

At 1107 PM CST, Doppler radar was tracking a strong thunderstorm near
Vandalia, moving northeast at 45 mph.

Winds in excess of 40 mph will be possible with this storm.

Locations impacted include...
Bowling Green, Vandalia, Curryville and Spencerburg.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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 3933 9119 3916 9150 3919 9156 3932 9147
      3932 9144 3936 9145 3944 9139
TIME...MOT...LOC 0507Z 219DEG 40KT 3923 9148

Byrd

The office that day

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

Issued	Product	Office	Counties	Lasted
Jan 21, 9:26 PM CST	Special Weather Statement	LSX	Cole	49 min
Jan 22, 1:43 AM CST	Special Weather Statement	LSX	Reynolds	47 min
Jan 22, 2:15 AM CST	Severe Thunderstorm Warning	LSX	Reynolds	45 min
Jan 22, 2:46 AM CST	Special Weather Statement	LSX	Iron, Madison	44 min
Jan 22, 3:17 AM CST	Special Weather Statement	LSX	Sainte Genevieve	43 min
Jan 22, 2:43 AM CST	Special Weather Statement	LSX	Monroe	47 min
Jan 22, 3:29 AM CST	Special Weather Statement	LSX	Bond, Clinton, Fayette, Marion	46 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.