Severe Thunderstorm Warning 47, NWS St. Louis, MO

977 
WWUS53 KLSX 290306
SVSLSX

Severe Weather Statement
National Weather Service St Louis MO
1006 PM CDT Tue Apr 28 2020

MOC179-221-290315-
/O.CAN.KLSX.SV.W.0047.000000T0000Z-200429T0330Z/
Reynolds MO-Washington MO-
1006 PM CDT Tue Apr 28 2020

...THE SEVERE THUNDERSTORM WARNING FOR EASTERN REYNOLDS AND
SOUTHEASTERN WASHINGTON COUNTIES IS CANCELLED...

The storms which prompted the warning have moved out of the warned 
area. Therefore, the warning has been cancelled.

A Severe Thunderstorm Watch remains in effect until 1100 PM CDT for
southwestern Illinois...and southeastern Missouri.

LAT...LON 3765 9072 3791 9045 3790 8996 3787 8994
      3764 9015 3731 9015 3732 9055 3727 9055
      3727 9074
TIME...MOT...LOC 0305Z 288DEG 39KT 3786 9020 3778 9029 3769 9032 3758
9045 3741 9043 3717 9053 3697 9066

$$

MOC093-123-186-187-290330-
/O.CON.KLSX.SV.W.0047.000000T0000Z-200429T0330Z/
Iron MO-Ste. Genevieve MO-Madison MO-St. Francois MO-
1006 PM CDT Tue Apr 28 2020

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1030 PM CDT
FOR EASTERN IRON...SOUTHERN STE. GENEVIEVE...MADISON AND SOUTHERN ST.
FRANCOIS COUNTIES IN SOUTHEASTERN MISSOURI...

At 1005 PM CDT, severe thunderstorms were located along a line
extending from Weingarten to near Coffman to near Knob Lick to near
Roselle to near Saco to near Greenville to near Brush Arbor, moving
east at 45 mph.

HAZARD...60 mph wind gusts and penny size hail.

SOURCE...Radar indicated.

IMPACT...Expect damage to roofs, siding, and trees.

Locations impacted include...
Farmington, Fredericktown, Ironton, Park Hills, Pilot Knob, Iron
Mountain Lake, Arcadia, St. Mary, Annapolis, Junction City, Cobalt,
Marquand, Knob Lick, Iron Mountain, Buckhorn, Weingarten, Glover,
Womac, Coffman and Roselle.

This also includes St. Joe State Park, Hawn State Park, Fort Davidson
Historic Site, Elephant Rocks State Park, and Missouri Mines Historic
Site.
 
This includes Interstate 55 in Missouri between exits 141 and 143.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

Intense thunderstorm lines can produce brief tornadoes and widespread
significant wind damage. Although a tornado is not immediately
likely, it is best to move to an interior room on the lowest floor of
a building. These storms may cause serious injury and significant
property damage.

&&

LAT...LON 3765 9072 3791 9045 3790 8996 3787 8994
      3764 9015 3731 9015 3732 9055 3727 9055
      3727 9074
TIME...MOT...LOC 0305Z 288DEG 39KT 3786 9020 3778 9029 3769 9032 3758
9045 3741 9043 3717 9053 3697 9066

TORNADO...POSSIBLE
HAIL...0.75IN
WIND...60MPH
 
$$

GKS

167 
WWUS53 KLSX 290331
SVSLSX

Severe Weather Statement
National Weather Service St Louis MO
1031 PM CDT Tue Apr 28 2020

MOC093-123-186-187-290340-
/O.EXP.KLSX.SV.W.0047.000000T0000Z-200429T0330Z/
Iron MO-Ste. Genevieve MO-Madison MO-St. Francois MO-
1031 PM CDT Tue Apr 28 2020

...THE SEVERE THUNDERSTORM WARNING FOR EASTERN IRON...SOUTHERN STE.
GENEVIEVE...MADISON AND SOUTHERN ST. FRANCOIS COUNTIES IN
SOUTHEASTERN MISSOURI HAS EXPIRED...
    
The storms which prompted the warning have moved out of the area.
Therefore, the warning has been allowed to expire.  However gusty
winds and heavy rain are still possible with these thunderstorms.

A Severe Thunderstorm Watch remains in effect until 1100 PM CDT for
southwestern Illinois...and southeastern Missouri.

LAT...LON 3765 9072 3791 9045 3790 8996 3787 8994
      3764 9015 3731 9015 3732 9055 3727 9055
      3727 9074
TIME...MOT...LOC 0330Z 234DEG 80KT 3817 8965 3809 8974 3800 8977 3790
8990 3773 8988 3749 8998 3729 9011

$$

GKS

Area Forecast Discussion...Updated Aviation
National Weather Service Saint Louis MO
646 PM CDT Tue Apr 28 2020

.SHORT TERM...  (Through Late Wednesday Night)
Issued at 325 PM CDT Tue Apr 28 2020

Attention for early this evening will be on strong to severe
thunderstorms. Initial activity, likely developing over the next
hour or two, should be discrete with large hail the dominant threat.
CAMs suggest a quick transition to more of a squall line, which
makes conceptual sense given strong forcing for ascent throughout
the troposphere. Damaging straight-line winds will be the focus
thereafter. Mesovortices along the line appear unlikely given
forecast 0-3km shear below 30 knots. Some weakening of the line is
likely late this evening as it approaches southeast Missouri and
southwest Illinois due to a combination of weakening instability and
the propensity for outflow to accelerate ahead of the convection.
Any threat for strong to severe convection should exit the CWA just
before midnight.

The remainder of the night should be mostly quiet, with dry weather
favored along with dropping temperatures behind the cold front. Rain
showers are likely across the area beneath the amplifying trough on
Wednesday. These showers combined with strong/gusty northwest winds
and temperatures in the 50s will make it feel like a raw, fall-like
day. Trimmed Wednesday's high temperatures a few degrees, giving a
nod to conditional climatology which suggests only a rise of about 2-
4 degrees from morning lows.

The trough axis attendant from the closed low across the Great Lakes
is expected to move far enough eastward Wednesday night. This is
forecast to help lead to any rain shower threat moving out of the
area as well. Decreasing cloudiness and chilly temperatures are
expected for the remainder of the night. Lows are likely to drop
into the mid 40s across the bi-state area.

Gosselin

.LONG TERM...  (Thursday through Next Tuesday)
Issued at 325 PM CDT Tue Apr 28 2020

(Thursday - Friday)

Seasonably cool and dry conditions are forecast to continue to end
the work week as GEFS/EPS depict a midlevel ridge axis translating
eastward toward the mid-Mississippi Valley. Temperatures are also
expected to moderate during this period, with Friday's highs in the
low to mid 70s or about 5-10 degrees warmer than Thursday.

(Friday Night - Next Tuesday)

Moderating temperatures are likely to continue through Saturday
ahead of a cold front with 850-hPa temperatures climbing to around
+15C. High temperatures on Saturday are likely to exceed 80 degrees
for the majority of the area.

The aforementioned cold front is expected to slowly move through the
area Saturday night through Sunday, likely providing a round of
showers and thunderstorms. The slow-moving nature of the front
combined with anomalously high precipitable water values (>1.50")
and high freezing levels suggest the possibility of a heavy rainfall
threat. However, details on storm track and the speed of the front
certainly can change over the coming days.

The cold front is expected to settle south of the CWA by late
Sunday/Sunday night. In its wake, a return to a dry, cooler than
normal regime should greet us on Monday. Another chance of showers
is possible on Tuesday as the next system moves out of the central
Plains.

Gosselin

&&

.AVIATION...  (For the 00z TAFs through 00z Wednesday Evening)
Issued at 634 PM CDT Tue Apr 28 2020

Line of thunderstorms is moving east/southeast having already
cleared KCOU and KUIN. This broken line of storms should impact
the metro terminals over the next few hours with strong
west/northwest winds the main threat. Maintained gusts to 40 knots
in a TEMPO group from the previous TAF. Visibilities will also be
reduced to IFR thresholds in heavier downpours. After the line of
storms moves through, a few hours of lighter rain and embedded
thunderstorms should continue for a couple of hours before drying
out completely. This dry weather along with northwest winds is
favored for the remainder of the night. MVFR ceilings with
stronger northwest winds and light rain showers is forecast across
the area on Wednesday.

SPECIFICS FOR KSTL:

Line of storms is forecast to enter the area within the next hour.
Gusty northwest winds around 40 knots and IFR visibilities are
likely for a brief period of time. After the line passes, a couple
hours of lighter rains along with embedded storms are forecast.
Dry weather is then forecast overnight along with northwest winds
around 10 knots. MVFR ceilings along with light rain showers and
gusty northwest winds are likely during the afternoon on
Wednesday.

Gosselin

&&

.LSX WATCHES/WARNINGS/ADVISORIES...
MO...None.
IL...None.
&&

WFO LSX

Hazardous Weather Outlook
National Weather Service Saint Louis MO
331 PM CDT Tue Apr 28 2020

ILZ058>060-064-065-069-070-074-079-095>102-MOZ018-019-026-027-
034>036-041-042-047>052-059>065-072>075-084-085-099-292045-
Adams IL-Audrain MO-Bond IL-Boone MO-Brown IL-Calhoun IL-Callaway MO-
Clinton IL-Cole MO-Crawford MO-Fayette IL-Franklin MO-Gasconade MO-
Greene IL-Iron MO-Jefferson MO-Jersey IL-Knox MO-Lewis MO-Lincoln MO-
Macoupin IL-Madison IL-Madison MO-Marion IL-Marion MO-Moniteau MO-
Monroe IL-Monroe MO-Montgomery IL-Montgomery MO-Osage MO-Pike IL-
Pike MO-Ralls MO-Randolph IL-Reynolds MO-Saint Charles MO-
Saint Clair IL-Saint Francois MO-Saint Louis City MO-Saint Louis MO-
Sainte Genevieve MO-Shelby MO-Warren MO-Washington IL-Washington MO-
331 PM CDT Tue Apr 28 2020

This Hazardous Weather Outlook is for portions of eastern and
central Missouri as well as west central and southwest Illinois.

.DAY ONE...Tonight.

Thunderstorms are likely before midnight tonight. Some of these
storms will likely be strong to severe with damaging winds and large
hail the primary threats.

.DAYS TWO THROUGH SEVEN...Wednesday through Monday.

There will be a chance of thunderstorms Saturday night through
Sunday.

.SPOTTER INFORMATION STATEMENT...

Spotter activation will likely be needed through this evening across
the area. Spotters are encouraged to report hail and any wind damage
to the National Weather Service.

Gosselin

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE ST LOUIS MO
903 PM CDT TUE APR 28 2020

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

0903 PM     HAIL             2 SSE HIGHLAND          38.72N 89.67W
04/28/2020  M0.70 INCH       MADISON            IL   AMATEUR RADIO

&&

MRM

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE ST LOUIS MO
905 PM CDT TUE APR 28 2020

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

0837 PM     HAIL             2 E COLUMBIA            38.44N 90.19W
04/28/2020  E0.50 INCH       MONROE             IL   PUBLIC

            REPORT FROM MPING: HALF-INCH (0.50 IN.).

&&

MRM

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE ST LOUIS MO
907 PM CDT TUE APR 28 2020

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

0832 PM     HAIL             1 SE FAIRVIEW HEIGHTS   38.59N 89.99W
04/28/2020  M0.50 INCH       ST. CLAIR          IL   OTHER FEDERAL

&&

MRM

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE ST LOUIS MO
913 PM CDT TUE APR 28 2020

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

0843 PM     TSTM WND DMG     1 SSE MASCOUTAH         38.49N 89.79W
04/28/2020                   ST. CLAIR          IL   PUBLIC

            SMALL TO MEDIUM TREE DOWN, POWER POLE DOWN.

&&

MRM

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE ST LOUIS MO
914 PM CDT TUE APR 28 2020

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

0846 PM     TSTM WND GST     3 SE MASCOUTAH          38.48N 89.76W
04/28/2020  M60 MPH          ST. CLAIR          IL   TRAINED SPOTTER

            SPOTTER CALLED AND STATED HIS BACK YARD
            WEATHER EQUIPMENT MEASURED 60 MPH GUST AS
            THE FRONT OF THE LINE MOVED THROUGH.

&&

MAPLES

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE ST LOUIS MO
926 PM CDT TUE APR 28 2020

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

0839 PM     TSTM WND DMG     SCOTT AFB               38.54N 89.85W
04/28/2020                   ST. CLAIR          IL   PUBLIC

            LARGE TREE UPROOTED, TIME ESTIMATED FROM
            RADAR.

&&

MRM