Heat Advisory 4, NWS St. Louis, MO

721 
WWUS73 KLSX 050815
NPWLSX

URGENT - WEATHER MESSAGE
NATIONAL WEATHER SERVICE ST LOUIS MO
315 AM CDT TUE JUL 5 2016

MOZ041-047>050-052200-
/O.NEW.KLSX.FG.Y.0008.160705T0815Z-160705T1300Z/
/O.CON.KLSX.HT.Y.0004.160705T1700Z-160706T0100Z/
BOONE MO-CALLAWAY MO-COLE MO-MONITEAU MO-OSAGE MO-
INCLUDING THE CITIES OF...COLUMBIA...FULTON...JEFFERSON CITY
315 AM CDT TUE JUL 5 2016

...DENSE FOG ADVISORY IN EFFECT UNTIL 8 AM CDT THIS MORNING...
...HEAT ADVISORY REMAINS IN EFFECT FROM NOON TODAY TO 8 PM CDT
THIS EVENING...

THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A DENSE FOG
ADVISORY...WHICH IS IN EFFECT UNTIL 8 AM CDT THIS MORNING.

* TIMING...WIDESPREAD DENSE FOG WILL AFFECT THE REGION EARLY THIS
  MORNING AND IS EXPECTED TO LIFT OR DISSIPATE BY MID-MORNING.
  TEMPERATURES WILL RISE INTO THE MID 90S TODAY WITH DANGEROUS
  LEVELS OF HEAT AND HUMIDITY DURING MUCH OF THE AFTERNOON AND
  EARLY EVENING HOURS.

* VISIBILITIES...ONE QUARTER MILE OR LESS AT TIMES IN FOG UNTIL 8
  AM THIS MORNING.

* HEAT INDEX VALUES...AROUND 105 DUE TO TEMPERATURES IN THE MID
  90S...AND DEWPOINTS IN THE MID 70S.

* IMPACTS...RAPID CHANGES IN VISIBILITY EARLY THIS MORNING WILL
  CAUSE HAZARDOUS DRIVING CONDITIONS. THE COMBINATION OF HOT
  TEMPERATURES AND HIGH HUMIDITY THIS AFTERNOON AND EARLY EVENING
  WILL LIKELY LEAD TO AN INCREASED RISK OF HEAT-RELATED STRESS AND
  ILLNESS. THE VERY YOUNG...THE ELDERLY...THOSE WITHOUT AIR
  CONDITIONING...AND THOSE PARTICIPATING IN STRENUOUS OUTDOOR
  ACTIVITIES WILL BE THE MOST SUSCEPTIBLE. ALSO...CAR INTERIORS
  CAN REACH LETHAL TEMPERATURES IN A MATTER OF MINUTES.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A HEAT ADVISORY MEANS THAT A PERIOD OF HOT TEMPERATURES AND HIGH
HUMIDITY WILL OCCUR. THIS COMBINATION WILL CREATE A SITUATION IN
WHICH HEAT-RELATED ILLNESSES ARE POSSIBLE...ESPECIALLY FOR THOSE
LIVING IN UN-AIR CONDITIONED HOMES OR APARTMENTS. PEOPLE IN THE
ADVISORY AREA ARE ADVISED TO AVOID POORLY VENTILATED AREAS AND
PROLONGED WORK IN THE SUN. ALSO...KEEP PLENTY OF LIQUIDS ON HAND
AND TRY TO STAY IN AN AIR CONDITIONED ENVIRONMENT.

TAKE EXTRA PRECAUTIONS IF YOU WORK OR SPEND TIME OUTSIDE. WHEN
POSSIBLE...RESCHEDULE STRENUOUS ACTIVITIES TO THE EARLY MORNING
OR EVENING. KNOW THE SIGNS AND SYMPTOMS OF HEAT EXHAUSTION AND
HEAT STROKE. WEAR LIGHT WEIGHT AND LOOSE FITTING CLOTHING WHEN
POSSIBLE AND DRINK PLENTY OF WATER.

BEAT THE HEAT...CHECK THE BACKSEAT! YOUNG CHILDREN AND PETS
SHOULD NEVER BE LEFT UNATTENDED IN VEHICLES UNDER ANY
CIRCUMSTANCES. THIS IS ESPECIALLY TRUE DURING WARM OR HOT WEATHER
WHEN CAR INTERIORS CAN REACH LETHAL TEMPERATURES IN A MATTER OF
MINUTES.

A DENSE FOG ADVISORY IS ISSUED WHEN DENSE FOG WILL SUBSTANTIALLY
REDUCE VISIBILITIES...TO ONE-QUARTER MILE OR LESS...RESULTING IN
HAZARDOUS DRIVING CONDITIONS IN MANY AREAS. MOTORISTS ARE ADVISED
TO USE CAUTION AND SLOW DOWN...AS OBJECTS ON AND NEAR ROADWAYS
WILL BE SEEN ONLY AT CLOSE RANGE.

&&

$$

ILZ058>060-064-065-069-070-074-079-098>102-MOZ051-052-059>065-
072>075-084-085-099-051300-
/O.NEW.KLSX.FG.Y.0008.160705T0815Z-160705T1300Z/
BOND IL-CALHOUN IL-CLINTON IL-CRAWFORD MO-FAYETTE IL-FRANKLIN MO-
GASCONADE MO-GREENE IL-IRON MO-JEFFERSON MO-JERSEY IL-LINCOLN MO-
MACOUPIN IL-MADISON IL-MADISON MO-MARION IL-MONROE IL-
MONTGOMERY IL-MONTGOMERY MO-RANDOLPH IL-REYNOLDS MO-
SAINT CHARLES MO-SAINT CLAIR IL-SAINT FRANCOIS MO-
SAINT LOUIS CITY MO-SAINT LOUIS MO-SAINTE GENEVIEVE MO-WARREN MO-
WASHINGTON IL-WASHINGTON MO-
INCLUDING THE CITIES OF...ALTON...BELLEVILLE...CAHOKIA...
CENTRALIA...CHESTER...EDWARDSVILLE...FARMINGTON...LITCHFIELD...
SAINT CHARLES...SAINT LOUIS...SALEM...SPARTA...SULLIVAN...UNION...
VANDALIA...WASHINGTON
315 AM CDT TUE JUL 5 2016

...DENSE FOG ADVISORY IN EFFECT UNTIL 8 AM CDT THIS MORNING...

THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A DENSE FOG
ADVISORY...WHICH IS IN EFFECT UNTIL 8 AM CDT THIS MORNING.

* TIMING...WIDESPREAD DENSE FOG WILL AFFECT THE REGION EARLY THIS
  MORNING AND IS EXPECTED TO LIFT OR DISSIPATE BY MID-MORNING.

* VISIBILITIES...ONE QUARTER MILE OR LESS AT TIMES.

* IMPACTS...RAPID CHANGES IN VISIBILITY WILL CAUSE HAZARDOUS 
  DRIVING CONDITIONS. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A DENSE FOG ADVISORY IS ISSUED WHEN DENSE FOG WILL SUBSTANTIALLY
REDUCE VISIBILITIES...TO ONE-QUARTER MILE OR LESS...RESULTING IN
HAZARDOUS DRIVING CONDITIONS IN MANY AREAS. MOTORISTS ARE ADVISED
TO USE CAUTION AND SLOW DOWN...AS OBJECTS ON AND NEAR ROADWAYS
WILL BE SEEN ONLY AT CLOSE RANGE.

&&

$$

TES

510 
WWUS73 KLSX 051233
NPWLSX

URGENT - WEATHER MESSAGE
NATIONAL WEATHER SERVICE ST LOUIS MO
733 AM CDT TUE JUL 5 2016

MOZ041-047>050-060100-
/O.EXP.KLSX.FG.Y.0008.000000T0000Z-160705T1300Z/
/O.CON.KLSX.HT.Y.0004.160705T1700Z-160706T0100Z/
BOONE MO-CALLAWAY MO-COLE MO-MONITEAU MO-OSAGE MO-
INCLUDING THE CITIES OF...COLUMBIA...FULTON...JEFFERSON CITY
733 AM CDT TUE JUL 5 2016

...HEAT ADVISORY REMAINS IN EFFECT FROM NOON TODAY TO 8 PM CDT
THIS EVENING...
...DENSE FOG ADVISORY WILL EXPIRE AT 8 AM CDT THIS MORNING...

* TIMING...TEMPERATURES WILL RISE INTO THE MID 90S TODAY WITH
  DANGEROUS LEVELS OF HEAT AND HUMIDITY DURING MUCH OF THE
  AFTERNOON AND EARLY EVENING HOURS.

* HEAT INDEX VALUES...UP TO 105 DUE TO TEMPERATURES IN THE MID 
  90S...AND DEWPOINTS IN THE MID 70S.

* IMPACTS...THE COMBINATION OF HOT TEMPERATURES AND HIGH HUMIDITY
  THIS AFTERNOON AND EARLY EVENING WILL LIKELY LEAD TO AN
  INCREASED RISK OF HEAT-RELATED STRESS AND ILLNESS. THE VERY
  YOUNG...THE ELDERLY...THOSE WITHOUT AIR CONDITIONING...AND THOSE
  PARTICIPATING IN STRENUOUS OUTDOOR ACTIVITIES WILL BE THE MOST
  SUSCEPTIBLE. ALSO...CAR INTERIORS CAN REACH LETHAL TEMPERATURES
  IN A MATTER OF MINUTES.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A HEAT ADVISORY MEANS THAT A PERIOD OF HOT TEMPERATURES AND HIGH
HUMIDITY WILL OCCUR. THIS COMBINATION WILL CREATE A SITUATION IN
WHICH HEAT-RELATED ILLNESSES ARE POSSIBLE...ESPECIALLY FOR THOSE
LIVING IN UN-AIR CONDITIONED HOMES OR APARTMENTS. PEOPLE IN THE
ADVISORY AREA ARE ADVISED TO AVOID POORLY VENTILATED AREAS AND
PROLONGED WORK IN THE SUN. ALSO...KEEP PLENTY OF LIQUIDS ON HAND
AND TRY TO STAY IN AN AIR CONDITIONED ENVIRONMENT.

TAKE EXTRA PRECAUTIONS IF YOU WORK OR SPEND TIME OUTSIDE. WHEN
POSSIBLE...RESCHEDULE STRENUOUS ACTIVITIES TO THE EARLY MORNING OR
EVENING. KNOW THE SIGNS AND SYMPTOMS OF HEAT EXHAUSTION AND HEAT
STROKE. WEAR LIGHT WEIGHT AND LOOSE FITTING CLOTHING WHEN POSSIBLE
AND DRINK PLENTY OF WATER.

TO REDUCE RISK DURING OUTDOOR WORK...THE OCCUPATIONAL SAFETY AND
HEALTH ADMINISTRATION RECOMMENDS SCHEDULING FREQUENT REST BREAKS
IN SHADED OR AIR CONDITIONED ENVIRONMENTS. ANYONE OVERCOME BY HEAT
SHOULD BE MOVED TO A COOL AND SHADED LOCATION. HEAT STROKE IS AN
EMERGENCY...CALL 9-1-1 IMMEDIATELY.

BEAT THE HEAT...CHECK THE BACKSEAT! YOUNG CHILDREN AND PETS
SHOULD NEVER BE LEFT UNATTENDED IN VEHICLES UNDER ANY
CIRCUMSTANCES. THIS IS ESPECIALLY TRUE DURING WARM OR HOT WEATHER
WHEN CAR INTERIORS CAN REACH LETHAL TEMPERATURES IN A MATTER OF
MINUTES.

&&

$$

ILZ058>060-064-065-069-070-074-079-098>102-MOZ051-052-059>065-
072>075-084-085-099-051345-
/O.EXP.KLSX.FG.Y.0008.000000T0000Z-160705T1300Z/
BOND IL-CALHOUN IL-CLINTON IL-CRAWFORD MO-FAYETTE IL-FRANKLIN MO-
GASCONADE MO-GREENE IL-IRON MO-JEFFERSON MO-JERSEY IL-LINCOLN MO-
MACOUPIN IL-MADISON IL-MADISON MO-MARION IL-MONROE IL-
MONTGOMERY IL-MONTGOMERY MO-RANDOLPH IL-REYNOLDS MO-
SAINT CHARLES MO-SAINT CLAIR IL-SAINT FRANCOIS MO-
SAINT LOUIS CITY MO-SAINT LOUIS MO-SAINTE GENEVIEVE MO-WARREN MO-
WASHINGTON IL-WASHINGTON MO-
INCLUDING THE CITIES OF...ALTON...BELLEVILLE...CAHOKIA...
CENTRALIA...CHESTER...EDWARDSVILLE...FARMINGTON...LITCHFIELD...
SAINT CHARLES...SAINT LOUIS...SALEM...SPARTA...SULLIVAN...UNION...
VANDALIA...WASHINGTON
733 AM CDT TUE JUL 5 2016

...DENSE FOG ADVISORY WILL EXPIRE AT 8 AM CDT THIS MORNING...

THE FOG IS IN THE PROCESS OF DISSIPATING WITH SIGNIFICANT
IMPROVEMENT IN VISIBILITIES IN ALL BUT A FEW ISOLATED LOCATIONS BY
8 AM. 

$$

TES

921 
WWUS73 KLSX 060056
NPWLSX

URGENT - WEATHER MESSAGE
NATIONAL WEATHER SERVICE ST LOUIS MO
756 PM CDT TUE JUL 5 2016

MOZ041-047>050-060200-
/O.EXP.KLSX.HT.Y.0004.000000T0000Z-160706T0100Z/
BOONE MO-CALLAWAY MO-COLE MO-MONITEAU MO-OSAGE MO-
INCLUDING THE CITIES OF...COLUMBIA...FULTON...JEFFERSON CITY
756 PM CDT TUE JUL 5 2016

...HEAT ADVISORY WILL EXPIRE AT 8 PM CDT THIS EVENING...

TEMPERATURES HAVE STARTED TO FALL INTO THE UPPER 80S THIS EVENING.
HEAT INDEX VALUES WILL CONTINUE TO FALL THIS EVENING...THEREFORE
THE HEAT ADVISORY WILL BE ALLOWED TO EXPIRE.

$$

KANOFSKY

Area Forecast Discussion...Updated Aviation
National Weather Service Saint Louis MO
646 AM CDT MON JUL 4 2016

.SHORT TERM...  (Through Late This Afternoon)
Issued at 425 AM CDT Mon Jul 4 2016

Due to ongoing convection across SE MO...decided to expand the Flash
Flood Watch south a row of counties and extended it in time to 18Z.
This activity is along the warm front that extends E into sthrn IL
from a SFC low in SW MO. The SFC low is expected to move along I-44
in MO and I-70 in IL...lifting the warm front N in the process.
Expect the precip across sthrn MO to expand ENE thru the mrng. This
activity should move E of the FA by early aftn. There could be
addtnl dvlpmnt along/near the bndry this aftn.  Anything that does
dvlp should move out of the CWA by late aftn. Any thunder should
remain along and S of the warm front.

2%

.LONG TERM...  (Tonight through Sunday)
Issued at 425 AM CDT Mon Jul 4 2016

A modest RIDGE continues to be advertised as building in for Tuesday
thru Thursday, allowing the return of hot and humid conditions but
due to this RIDGE not being particularly strong, will also not
deflect upper level disturbances north of our area, either.

Dry wx is anticipated for tonight with min temps near average for
this time of year.

Already by Tuesday afternoon, the old frontal boundary to our south
will buckle north into central and southeast MO, providing a weak
focus at the low levels and being the leading edge of decent
moisture and instability return, with MLCAPE values of 3000 near the
warm front.  Shear will be typical summertime very weak values, but
by instability alone, a conditional strong-severe storm threat will
exist, provided anything does form.

Some of this activity may last into early evening before what should
be yielding to a MCS that will be tracking from the northwest into
parts of our region late Tuesday night into Wednesday morning.

Beyond this, forecasting MCS events will be difficult heading into
late week, but our region looks to remain in a persistent chance for
these in the following days.  In addition, a cold front will edge
our region around Friday,

Of greater importance will be a return of heat with dewpoints on the
high side thanks to the recent anticipated rainfall, and could yield
several days in a row of 100+ heat index values each afternoon with
a couple breaking 105-110, but will also depend on how well
convection can stay away to allow for the heat.  Already on Tuesday
afternoon, we could see heat index values peaking around 100 in a
few spots, with a more widespread heat event shaping up for
Wednesday thru Friday.  Have held off on any heat headlines for one
more package until we can look past our current flood threat and
hopefully gain a bit more insight and confidence on pcpn threats for
later this week and whether they can negatively impact the current
heat forecast.

TES

&&

.AVIATION...  (For the 12z TAFs through 12z Tuesday Morning)
Issued at 625 AM CDT Mon Jul 4 2016

Fcst concerns this prd focus on IFR CIGs/VSBYs and precip trends.
Precip is ongoing along a warm front extending E into sthrn IL from
an area of low pressure across SW MO. The low will slide ENE along
I-44 in MO this mrng and then I-70 in IL this aftn and evng. SHRAs
and ISLD TSTMs will be possible along and ahead of the low. The
wind fcst is low confidence in the STL metro area since the SFC
low is fcst to pass nearly directly overhead today. This may cause
a several hour prd where winds truly go lght/vrb...but should
eventually become Wrly behind the low. The main impact though
will be the low clouds and fog...which will be slow to improve
today. VSBYs may improve in the rain but CIGs should remain low.
Guidance indicates that fog is possible once again tonight...and
it becomes more likely if skies are able to clear out overnight.
Not confident enough yet to include attm.

Specifics for KSTL:

IFR conditions are expected thru the mrng with occnl SHRAs. VSBYs
may come up quicker than fcst in the rain but CIGs will remain
slow to improve this mrng. Winds will be tricky too with the SFC
low passing very near the terminal...and may go lght/vrb for a
while today as the low passes by but eventually should become Wrly
by late this aftn. Skies should clear out late tonight which may
aid in fog formation. Not confident enough to include attm.

Miller

&&

.LSX WATCHES/WARNINGS/ADVISORIES...
MO...Flash Flood Watch until noon CDT today for Crawford MO-Iron MO-
     Jefferson MO-Madison MO-Reynolds MO-Saint Francois MO-
     Sainte Genevieve MO-Washington MO.

IL...Flash Flood Watch until noon CDT today for Clinton IL-Marion IL-
     Monroe IL-Randolph IL-Saint Clair IL-Washington IL.

&&

WFO LSX

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE ST LOUIS MO
440 AM CDT MON JUL 4 2016

ILZ058>060-064-065-069-070-074-079-095>102-MOZ018-019-026-027-
034>036-041-042-047>052-059>065-072>075-084-085-099-051200-
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-
440 AM CDT MON JUL 4 2016

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 WILL CONTINUE THROUGH THIS MORNING FOR AREAS SOUTH
OF INTERSTATE 70...DIMINISHING THIS AFTERNOON. SOUTHEAST MISSOURI
AND SOUTHERN ILLINOIS WILL ALSO SEE THE GREATEST RISK OF HEAVY
RAINFALL WITH AN ADDITIONAL 1 TO 3 INCHES POSSIBLE. PLEASE REFER
TO THE FLASH FLOOD WATCH THAT IS IN EFFECT FOR FURTHER INFO.

.DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY

A FEW STRONG TO SEVERE THUNDERSTORMS ARE POSSIBLE LATE TUESDAY
AFTERNOON AND TUESDAY NIGHT.

HEAT INDEX VALUES AROUND 100 DEGREES RETURN TO PARTS OF CENTRAL
MISSOURI AND THE SAINT LOUIS METRO AREA ON TUESDAY AFTERNOON...AND
RANGE FROM 100 TO 108 FOR MUCH OF THE REGION EACH AFTERNOON AND
EARLY EVENING FROM WEDNESDAY THROUGH FRIDAY.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ATTENTION IS REQUIRED. SPOTTERS ARE ENCOURAGED TO REPORT
RAINFALL AMOUNTS IN EXCESS OF TWO INCHES OR ANY FLOODING...IF
OBSERVED...TO THE NATIONAL WEATHER SERVICE.

TES

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE ST LOUIS MO
251 PM CDT MON JUL 04 2016

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

1200 PM     HEAVY RAIN       1 S ROXANA              38.82N  90.05W
07/04/2016  M4.26 INCH       MADISON            IL   TRAINED SPOTTER

            STORM TOTAL RAINFALL.

&&

BYRD