Alert archive / Missouri / Winter Weather Advisories in 2013

Winter Weather Advisory 2, NWS St. Louis, MO

January 29, 2013Knox County, Lewis County, Shelby County, Missouri

NWS St. Louis, MO issued this winter weather advisory at Jan 29, 2013, 4:08 PM CST for Knox County, Lewis County, Shelby County, Missouri. It took effect at Jan 30, 2013, 4:00 AM CST. It was in force for 11 hr.

The area

The counties it named.

The facts

Issued: Jan 29, 2013, 4:08 PM CST (22:08 UTC)
In effect from: Jan 30, 2013, 4:00 AM CST
Expired: Jan 30, 2013, 3:00 PM CST
In force: 11 hr
Issued by: NWS St. Louis, MO

Counties Knox County, MO, Lewis County, MO, Shelby County, MO

The radar

The St Louis radar (KLSX), 183 km from the middle of the area, began a volume at 22:09 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

Topeka, KS (KTOP), launched 12:00Z, 10.1 hours before the alert went out and 333 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: 160 J/kg
Mixed-layer CIN: -95 J/kg
Mixed-layer LCL: 578 m above ground
0-6 km bulk shear: 88 kt
0-1 km storm-relative helicity: 212 m²/s²
0-3 km storm-relative helicity: 147 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.4

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this winter weather advisory 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 winter weather advisory went out at Jan 29, 3:59 PM CST, 9 minutes earlier.

Area forecast discussion, Jan 29, 3:59 PM CST, 9 minutes before

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Hazardous weather outlook, Jan 29, 5:00 AM CST, 11 hours 8 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE ST LOUIS MO
500 AM CST TUE JAN 29 2013

ILZ058>060-064-065-069-070-074-079-095>102-MOZ018-019-026-027-
034>036-041-042-047>052-059>065-072>075-084-085-099-301100-
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-ST. 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-ST. CHARLES MO-FRANKLIN MO-
ST. LOUIS MO-ST. LOUIS CITY MO-JEFFERSON MO-CRAWFORD MO-
WASHINGTON MO-ST. FRANCOIS MO-STE. GENEVIEVE MO-IRON MO-
MADISON MO-REYNOLDS MO-
500 AM CST TUE JAN 29 2013

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF EASTERN AND
CENTRAL MISSOURI AS WELL AS WEST CENTRAL AND SOUTHWEST ILLINOIS.

.DAY ONE...TODAY AND TONIGHT

THUNDERSTORMS ARE EXPECTED TODAY AND TONIGHT. SOME OF THE STORMS
MAY BE SEVERE AND PRODUCE LOCALLY HEAVY RAINFALL. THE PRIMARY
SEVERE WEATHER THREAT WILL BE DAMAGING THUNDERSTORM WINDS...BUT
THERE MAY ALSO BE LARGE HAIL AND ISOLATED TORNADOES.

SNOW IS LIKELY ACROSS NORTHEAST MISSOURI LATE TONIGHT.  LIGHT SNOW
ACCUMULATIONS ARE POSSIBLE.

.DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY

SNOW IS LIKELY ACROSS NORTHEAST MISSOURI AND WEST CENTRAL ILLINOIS
WEDNESDAY MORNING. LIGHT SNOW ACCUMULATIONS ARE POSSIBLE.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION MAY BE NEEDED TODAY AND TONIGHT.

GKS

In the hours before

Local storm report, Jan 29, 1:16 PM CST, 2 hours 52 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE ST LOUIS MO
116 PM CST TUE JAN 29 2013

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

0105 PM     TSTM WND DMG     NEW BLOOMFIELD          38.72N  92.09W
01/29/2013                   CALLAWAY           MO   AMATEUR RADIO

            TREE REPORTED DOWN BY AMATEUR RADIO OPERATOR.

&&

FUCHS

Local storm report, Jan 29, 1:17 PM CST, 2 hours 51 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE ST LOUIS MO
117 PM CST TUE JAN 29 2013

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

1253 PM     TSTM WND DMG     JEFFERSON CITY          38.57N  92.19W
01/29/2013                   COLE               MO   AMATEUR RADIO

            AMATEUR RADIO OPERATOR REPORTING 6-7 POWER POLES DOWN
            IN THE APACHE FLATS AREA OF WESTERN JEFFERSON CITY.

&&

FUCHS

Local storm report, Jan 29, 1:30 PM CST, 2 hours 38 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE ST LOUIS MO
130 PM CST TUE JAN 29 2013

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

0100 PM     TSTM WND DMG     HOLTS SUMMIT            38.64N  92.12W
01/29/2013                   CALLAWAY           MO   LAW ENFORCEMENT

            METAL SHED BLOWN OVER INTO A NEIGHBORS YARD.

&&

FUCHS

Local storm report, Jan 29, 2:34 PM CST, 1 hour 34 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE ST LOUIS MO
234 PM CST TUE JAN 29 2013

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

0233 PM     HAIL             7 SE RICH FOUNTAIN      38.34N  91.77W
01/29/2013  E0.88 INCH       OSAGE              MO   TRAINED SPOTTER

&&

PHILLIPSON

Local storm report, Jan 29, 2:50 PM CST, 1 hour 18 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE ST LOUIS MO
250 PM CST TUE JAN 29 2013

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

0230 PM     HAIL             8 E FREEBURG            38.32N  91.77W
01/29/2013  E0.88 INCH       OSAGE              MO   911 CALL CENTER

            OSAGE 911 CALL CENTER SAID NICKEL SIZE HAIL REPORTED
            NEAR BELLE MO AT THE MARIES COUNTY LINE.

&&

FUCHS

Local storm report, Jan 29, 3:32 PM CST, 36 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
Jan 29, 10:38 AM CST	River Flood Warning	LSX	Saint Charles	52 hr
Jan 29, 12:57 PM CST	Severe Thunderstorm Warning	LSX	Boone, Callaway	48 min
Jan 29, 1:21 PM CST	Severe Thunderstorm Warning	LSX	Audrain, Callaway, Montgomery	39 min
Jan 29, 1:35 PM CST	Severe Thunderstorm Warning	LSX	Montgomery	25 min
Jan 29, 1:50 PM CST	Severe Thunderstorm Warning	LSX	Audrain, Lincoln, Montgomery, Pike, Ralls	40 min
Jan 29, 2:27 PM CST	Severe Thunderstorm Warning	LSX	Gasconade, Osage	48 min
Jan 29, 2:52 PM CST	Severe Thunderstorm Warning	LSX	Franklin, Warren	38 min
Jan 29, 3:12 PM CST	Tornado Warning	LSX	Saint Charles, Warren	33 min
Jan 29, 3:30 PM CST	Tornado Warning	LSX	Lincoln, Saint Charles	30 min
Jan 29, 3:42 PM CST	Tornado Warning	LSX	Lincoln	33 min

Nearby

Winter Weather Advisories in Missouri, 2013 Every winter weather advisory in 2013

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.