Alert archive / Missouri / Special Weather Statements in 2017

Special Weather Statement, NWS St. Louis, MO

June 17, 2017Lewis County, Missouri

NWS St. Louis, MO issued this special weather statement at Jun 17, 2017, 12:23 AM CDT for Lewis 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: Jun 17, 2017, 12:23 AM CDT (05:23 UTC)
Expired: Jun 17, 2017, 1:15 AM CDT
In force: 52 min
Issued by: NWS St. Louis, MO

County Lewis County, MO

The radar

The Quad Cities radar (KDVN), 186 km from the middle of the area, began a volume at 05:23 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

Davenport, (KDVN), launched 00:00Z, 5.4 hours before the alert went out and 191 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: 962 J/kg
Mixed-layer CIN: -34 J/kg
Mixed-layer LCL: 1772 m above ground
0-6 km bulk shear: 25 kt
0-1 km storm-relative helicity: 2 m²/s²
0-3 km storm-relative helicity: 94 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.8

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 16, 10:00 PM CDT, 2 hours 23 minutes earlier.

Area forecast discussion, Jun 16, 10:00 PM CDT, 2 hours 23 minutes before

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<head>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width, initial-scale=1">
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  <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.
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Hazardous weather outlook, Jun 16, 4:06 PM CDT, 8 hours 17 minutes before

Hazardous Weather Outlook
National Weather Service Saint Louis MO
406 PM CDT Fri Jun 16 2017

ILZ058>060-064-065-069-070-074-079-095>102-MOZ018-019-026-027-
034>036-041-042-047>052-059>065-072>075-084-085-099-171200-
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-
406 PM CDT Fri Jun 16 2017

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

.DAY ONE...Tonight

Severe thunderstorms are possible late tonight into the overnight
hours for parts of central and northeast Missouri. The primary
threats are large hail and damaging wind gusts.

.DAYS TWO THROUGH SEVEN...Saturday through Thursday

Severe thunderstorms are possible from late Saturday afternoon
into Saturday night. The primary threat is damaging wind gusts.

.SPOTTER INFORMATION STATEMENT...

Spotter activation may be needed late tonight.

Kanofsky

In the hours before

Local storm report, Jun 16, 9:57 PM CDT, 2 hours 26 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE ST LOUIS MO
957 PM CDT FRI JUN 16 2017

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0420 PM     TSTM WND DMG     7 N GREENVILLE          38.99N  89.40W
06/16/2017                   BOND               IL   BROADCAST MEDIA

            A FEW LARGE TREE LIMBS BLOWN DOWN AND THE SIDE OF A
            METAL SHED BLOWN OUTWARD.

&&

EVENT NUMBER LSX1700494

CARNEY

Special weather statement, Jun 17, 12:23 AM CDT, 0 minutes before

Special Weather Statement
National Weather Service St Louis MO
1223 AM CDT SAT JUN 17 2017

MOZ018-019-170615-
Knox MO-Lewis MO-
1223 AM CDT SAT JUN 17 2017

...SIGNIFICANT WEATHER ADVISORY FOR EASTERN KNOX AND LEWIS COUNTIES
UNTIL 115 AM CDT...

At 1222 AM CDT, Doppler radar was tracking a strong thunderstorm near
Knox City, moving east at 30 mph.

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

Locations impacted include...
Canton, La Belle, Lewistown, Ewing, Knox City, Maywood, Plevna,
Colony, Steffenville, Monticello and Newark.

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.

&&

A severe thunderstorm watch remains in effect until 500 AM CDT for
northeastern Missouri.

LAT...LON 4030 9195 4026 9195 4026 9193 4025 9150
      4024 9151 4020 9150 4018 9151 4012 9151
      3995 9152 3996 9215 4030 9214
TIME...MOT...LOC 0522Z 249DEG 28KT 4019 9199

GKS

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 17, 1:09 AM CDT	Special Weather Statement	LSX	Audrain, Boone, Cole, Moniteau	51 min
Jun 17, 1:29 AM CDT	Special Weather Statement	LSX	Lewis, Marion, Monroe, Ralls, Shelby	46 min
Jun 17, 1:57 AM CDT	Special Weather Statement	LSX	Audrain, Callaway, Gasconade, Montgomery, Osage, Pike and 1 more	48 min
Jun 17, 2:54 AM CDT	Heat Advisory	LSX	Boone, Cole, Moniteau	13 hr

Nearby

Special Weather Statements in Missouri, 2017 Every special weather statement in 2017

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.