Beach Hazards Statement 4, NWS Chicago, IL

011 
WHUS43 KLOT 100856
CFWLOT

LAKESHORE HAZARD MESSAGE
National Weather Service Chicago IL
356 AM CDT Fri Jul 10 2020

INZ001-002-101700-
/O.EXT.KLOT.BH.S.0004.200710T1400Z-200711T1200Z/
Lake IN-Porter-
356 AM CDT Fri Jul 10 2020

...BEACH HAZARDS STATEMENT NOW IN EFFECT FROM 9 AM CDT THIS
MORNING THROUGH SATURDAY MORNING...

* LOCATION...Lake Michigan beaches in northwest Indiana.

* HIGH WAVE ACTION AND DANGEROUS SWIMMING CONDITIONS EXPECTED.

* FORECAST WAVE HEIGHTS...3 to 6 feet.

* STRONG RIP CURRENTS AND STRUCTURAL CURRENTS EXPECTED.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Life threatening waves and currents are expected at the beaches.
People visiting the beaches should stay out of the water.

Rip currents are powerful channels of water flowing quickly away
from shore, which occur most often at low spots or breaks in
sandbars. Rip currents can sweep you into deeper water.

Structural currents form along piers where longshore currents and
wave action flow into the structure. Structural currents can
sweep you into deeper water along the pier structure.

Exposed beaches are more likely to experience the most
significant wave and current impacts. Impacts at beaches with
protective breakwalls or jetties will be subject to the
orientation of structures as well as wind and wave direction.

&&

$$

Petr

468 
WHUS43 KLOT 101409
CFWLOT

LAKESHORE HAZARD MESSAGE
National Weather Service Chicago IL
909 AM CDT Fri Jul 10 2020

INZ001-002-102215-
/O.CON.KLOT.BH.S.0004.000000T0000Z-200711T1200Z/
Lake IN-Porter-
909 AM CDT Fri Jul 10 2020

...BEACH HAZARDS STATEMENT REMAINS IN EFFECT THROUGH SATURDAY
MORNING...

* LOCATION...Lake Michigan beaches in northwest Indiana.

* HIGH WAVE ACTION AND DANGEROUS SWIMMING CONDITIONS EXPECTED.

* FORECAST WAVE HEIGHTS...3 to 6 feet.

* STRONG RIP CURRENTS AND STRUCTURAL CURRENTS EXPECTED.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Life threatening waves and currents are expected at the beaches.
People visiting the beaches should stay out of the water.

Rip currents are powerful channels of water flowing quickly away
from shore, which occur most often at low spots or breaks in
sandbars. Rip currents can sweep you into deeper water.

Structural currents form along piers where longshore currents and
wave action flow into the structure. Structural currents can
sweep you into deeper water along the pier structure.

Exposed beaches are more likely to experience the most
significant wave and current impacts. Impacts at beaches with
protective breakwalls or jetties will be subject to the
orientation of structures as well as wind and wave direction.

&&

$$

KJB

361 
WHUS43 KLOT 102041
CFWLOT

LAKESHORE HAZARD MESSAGE
National Weather Service Chicago IL
341 PM CDT Fri Jul 10 2020

INZ001-002-110445-
/O.CON.KLOT.BH.S.0004.000000T0000Z-200711T1200Z/
Lake IN-Porter-
341 PM CDT Fri Jul 10 2020

...BEACH HAZARDS STATEMENT REMAINS IN EFFECT THROUGH SATURDAY
MORNING...

* LOCATION...Lake Michigan beaches in northwest Indiana.

* HIGH WAVE ACTION AND DANGEROUS SWIMMING CONDITIONS EXPECTED.

* FORECAST WAVE HEIGHTS...3 to 6 feet.

* STRONG RIP CURRENTS AND STRUCTURAL CURRENTS EXPECTED.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Life threatening waves and currents are expected at the beaches.
People visiting the beaches should stay out of the water.

Rip currents are powerful channels of water flowing quickly away
from shore, which occur most often at low spots or breaks in
sandbars. Rip currents can sweep you into deeper water.

Structural currents form along piers where longshore currents and
wave action flow into the structure. Structural currents can
sweep you into deeper water along the pier structure.

Exposed beaches are more likely to experience the most
significant wave and current impacts. Impacts at beaches with
protective breakwalls or jetties will be subject to the
orientation of structures as well as wind and wave direction.

&&

$$

KMD

786 
WHUS43 KLOT 110228
CFWLOT

LAKESHORE HAZARD MESSAGE
National Weather Service Chicago IL
928 PM CDT Fri Jul 10 2020

INZ001-002-111030-
/O.CON.KLOT.BH.S.0004.000000T0000Z-200711T1200Z/
Lake IN-Porter-
928 PM CDT Fri Jul 10 2020

...BEACH HAZARDS STATEMENT REMAINS IN EFFECT UNTIL 7 AM CDT
SATURDAY...

* LOCATION...Lake Michigan beaches in northwest Indiana.

* HIGH WAVE ACTION AND DANGEROUS SWIMMING CONDITIONS EXPECTED.

* FORECAST WAVE HEIGHTS...3 to 5 feet.

* STRONG RIP CURRENTS AND STRUCTURAL CURRENTS EXPECTED.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Life threatening waves and currents are expected at the beaches.
People visiting the beaches should stay out of the water.

Rip currents are powerful channels of water flowing quickly away
from shore, which occur most often at low spots or breaks in
sandbars. Rip currents can sweep you into deeper water.

Structural currents form along piers where longshore currents and
wave action flow into the structure. Structural currents can
sweep you into deeper water along the pier structure.

Exposed beaches are more likely to experience the most
significant wave and current impacts. Impacts at beaches with
protective breakwalls or jetties will be subject to the
orientation of structures as well as wind and wave direction.

&&

$$

439 
WHUS43 KLOT 110859
CFWLOT

LAKESHORE HAZARD MESSAGE
National Weather Service Chicago IL
359 AM CDT Sat Jul 11 2020

INZ001-002-111200-
/O.CON.KLOT.BH.S.0004.000000T0000Z-200711T1200Z/
Lake IN-Porter-
359 AM CDT Sat Jul 11 2020

...BEACH HAZARDS STATEMENT REMAINS IN EFFECT UNTIL 7 AM CDT THIS
MORNING...

* LOCATION...Lake Michigan beaches in northwest Indiana.

* HIGH WAVE ACTION AND DANGEROUS SWIMMING CONDITIONS EXPECTED.

* FORECAST WAVE HEIGHTS...3 to 5 feet.

* STRONG RIP CURRENTS AND STRUCTURAL CURRENTS EXPECTED.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Life threatening waves and currents are expected at the beaches.
People visiting the beaches should stay out of the water.

Rip currents are powerful channels of water flowing quickly away
from shore, which occur most often at low spots or breaks in
sandbars. Rip currents can sweep you into deeper water.

Structural currents form along piers where longshore currents and
wave action flow into the structure. Structural currents can
sweep you into deeper water along the pier structure.

Exposed beaches are more likely to experience the most
significant wave and current impacts. Impacts at beaches with
protective breakwalls or jetties will be subject to the
orientation of structures as well as wind and wave direction.

&&

$$

Petr

Area Forecast Discussion
National Weather Service Chicago/Romeoville, IL
630 PM CDT Thu Jul 9 2020

.SHORT TERM...
257 PM CDT

Through Friday night...

The chances for some severe thunderstorms and heavy rainfall
continue to be the primary concern for northern IL late this
afternoon through the evening.

Thunderstorm activity over our area has remained isolated to this
point. However, thunderstorms have been on the uptick to our west
over IA early this afternoon in advance of an approaching MCV
over central IA. The MCV will track eastward into northwestern IL
this evening, and over northeastern IL tonight. As it does so, it
will continue to interact with an uncapped and unstable environment
(1800 MLCAPE per the 18z DVN RAOB) thus leading to more numerous
showers and storm development in a band or two over northern IL
into this evening. The threat of severe thunderstorms will
continue to be primarily focused on some isolated instances of
damaging wind gusts over northern central, and perhaps parts of
northeastern IL this evening. This threat should wane across the
area later this evening and overnight.

The other threat with these storms this evening into tonight is
the threat for some periods of very heavy rainfall. Since the
storms are expected to develop into north to south oriented
bands, which will be nearly parallel to the steering layer flow,
the potential exists for a period of training storms over northern
IL this evening. This adds some concern for the potential for
some areas of flash flooding as the rain rates in these storms
could easily exceed 2" per hour. So, even though some of the area
has been on the dry side lately, I cannot rule out this
possibility especially in more urban areas. We have opted to hold
off on issuing a flash flood watch, but this will need to be
monitored closely for portions of northern IL this evening.

Some showers and storms could linger over eastern IL and
northwestern IL late tonight, but this activity should begin to
shift out of the area Friday morning. Thereafter, it appears that
Friday afternoon could be mainly dry across the area. Temperatures
should also be cooler on Friday as some breezy northwesterly winds
develop and usher in a bit cooler airmass. Expect high
temperatures to be in the mid to upper 80s.

KJB

&&

.LONG TERM...
316 PM CDT

Saturday through Thursday...

Northwest flow expected over the weekend with some model
discrepancies regarding potential northwest flow shortwave. NAM
and GFS both have a more amplified shortwave (likely result of
convective enhancement) with an attendant greater convective
risk, though with differing timing (GFS Saturday night vs NAM
Sunday). The ECMWF doesn't really have any meaningful shortwave
with the northwest flow this weekend and would support largely a
dry weekend. While a more amplified solution cannot be ruled out,
leaning toward the less amplified ECMWF solution. NBM pops were
fairly aggressive for the weekend, so reverted back to previous
shift's lower pops. Certainly the NAM/GFS would support hanging
on to these pops, and should these more amplified solutions
verify, then pops would likely need to be bumped up once
confidence in timing increases.

Would appear the massive/intense heat dome over the central and
western U.S. looks like it will briefly bulge northeastward into
the area Tues/Wed time frame in advance of a northern stream
shortwave trough. This should allow temps to rebound back into the
90s by Tuesday with NBM keeping 90s going the remainder of the
week. Worth noting that if convection/convective debris were to
linger during the afternoon, then there could be an unscheduled
break in the 90 degree heat.

Tightening geopotential height gradient between the strong upper
ridge and northern stream trough will result in a corridor of
stronger flow aloft, which could certainly support a ring of fire
type pattern with attendant strong/severe convective threat on the
northern flanks of the upper ridge. At this distance, hard to say
where exactly this will set-up and if it will affect our CWA. Our
best chances look to be in the midweek Tue-Thu time frame, which
is where NBM pops were targeting the best chances. Beyond that
time frame, medium range ensemble guidance continues to suggest
the heart of the upper ridge will build northeast into the Midwest
next weekend. If this pans out, an even more intense spell of
heat would be possible at that time.

- Izzi

&&

.AVIATION...
For the 00Z TAFs...

630 PM...Forecast concerns include...

Thunderstorms this evening.
Showers and mvfr cigs overnight/daybreak.
Gusty northwest winds Friday.

Isolated thunderstorms continue to develop across northern IL
late this afternoon with a line of storms crossing into northwest
IL. The isolated activity will continue over the next few hours
with coverage likely increasing toward the WI/IL state line. The
line of storms to the west is expected to move east across the
terminals through the evening. Any of these storms will be able to
produce strong/erratic winds/outflows along with very heavy rain
that may briefly reduce visibility to 1sm or less. After this
activity ends late this evening...there will be a continued chance
for showers overnight and toward daybreak Friday morning. Only
medium confidence for coverage but opted to add prevailing showers
to this forecast. During this time period...cigs are expected to
lower into mvfr with low mvfr or ifr cigs possible. Confidence is
low for cigs overnight and cigs should lift quickly by mid/late
Friday morning...possibly scattering out by midday.

Prevailing winds outside of the thunderstorms will likely be south
or south/southeast early this evening with gusts into the 20kt
range. Winds will likely become disturbed with convective activity
possibly becoming light southeast late this evening and then
shifting northwest with a cold front in the predawn hours. Winds
and gusts will steadily increase Friday morning with gusts into
the lower/mid 20kt range through sunset Friday evening. cms

&&

.LOT WATCHES/WARNINGS/ADVISORIES...
IL...None.
IN...None.
LM...None.
&&

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Hazardous Weather Outlook
National Weather Service Chicago/Romeoville IL
408 PM CDT Thu Jul 9 2020

ILZ003>006-008-010>013-019>021-023-032-033-039-103>108-INZ001-002-
010-011-019-102115-
Winnebago-Boone-McHenry-Lake IL-Ogle-Lee-De Kalb-Kane-DuPage-
La Salle-Kendall-Grundy-Kankakee-Livingston-Iroquois-Ford-
Northern Cook-Central Cook-Southern Cook-Northern Will-
Southern Will-Eastern Will-Lake IN-Porter-Newton-Jasper-Benton-
408 PM CDT Thu Jul 9 2020 /508 PM EDT Thu Jul 9 2020/

This Hazardous Weather Outlook is for portions of North Central
Illinois...Northeast Illinois and Northwest Indiana.

.DAY ONE...Tonight.

Weather hazards expected...

  Significant Thunderstorm Risk...with an associated:
     Elevated damaging wind risk...up to 70 mph.
     Limited hail risk...up to quarter size.
  Limited Flooding Risk.
  Limited Excessive Heat Risk.

DISCUSSION...

Thunderstorms will increase in coverage this evening and could
continue into the portions of the overnight hours. A few of the
storms this evening could become strong to locally severe with
damaging winds the primary threat.

.DAYS TWO THROUGH SEVEN...Friday through Wednesday.

Friday through Monday...
  Limited Thunderstorm Risk.
Tuesday and Wednesday...
  Limited Thunderstorm Risk.
  Limited Excessive Heat Risk.

DISCUSSION:

There is a small chance of thunderstorms this weekend. Hot weather
is expected to return Tuesday and Wednesday with some threat of
thunderstorms as well.

.SPOTTER INFORMATION STATEMENT...

Spotters may be needed this evening, especially along the I-39
corridor.

GENERAL STORM MOTION OF THE DAY:

 Moving toward northeast at 15 to 20 mph.

LMZ740>745-102115-
Winthrop Harbor to Wilmette Harbor IL-
Wilmette Harbor to Northerly Island IL-
Northerly Island to Calumet Harbor IL-
Calumet Harbor IL to Gary IN-Gary to Burns Harbor IN-
Burns Harbor to Michigan City IN-
408 PM CDT Thu Jul 9 2020

This Hazardous Weather Outlook is for portions of the Illinois
nearshore waters of Lake Michigan and the Indiana nearshore
waters of Lake Michigan.

.DAY ONE...Tonight.

Weather hazards expected...

  Significant Thunderstorm Risk...with an associated:
    Limited thunderstorm wind gust risk...up to 50 knots.

.DAYS TWO THROUGH SEVEN...Friday through Wednesday.

Friday through Sunday...
  Limited Thunderstorm Risk.
Tuesday and Wednesday...
  Limited Thunderstorm Risk.

- Izzi

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PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE CHICAGO IL
805 PM CDT THU JUL 9 2020

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

0710 PM     TSTM WND DMG     ELGIN                   42.04N 88.28W
07/09/2020                   KANE               IL   PUBLIC

            LARGE TREE LIMBS WERE BLOWN DOWN. VIDEO
            SHARED ON TWITTER. TIME ESTIMATED.

&&

Special Weather Statement
National Weather Service Chicago/Romeoville
810 PM CDT Thu Jul 9 2020

ILZ004-005-011-012-019-020-100215-
Kane IL-Boone IL-De Kalb IL-McHenry IL-Kendall IL-La Salle IL-
810 PM CDT Thu Jul 9 2020

...GUSTY WINDS MOVING THROUGH NORTHERN ILLINOIS...

At 808 PM CDT, Doppler radar was tracking gusty winds along a wind
shift along a line extending from near Walworth to near Kingston to
near Paw Paw. Movement was southeast at 25 mph.

Winds of 30 to 40 mph will be possible with these storms. These
winds may move around lawn furnature and bring down small tree
branches.

Locations impacted include...
Aurora, Elgin, DeKalb, Bartlett, Crystal Lake, Carpentersville, St.
Charles, Oswego, Algonquin, Lake in the Hills, West Chicago, McHenry,
Batavia, Belvidere, Woodstock, Huntley, Geneva, Sycamore, Yorkville
and Campton Hills.

Including the following interstates...
 I-39 between mile markers 66 and 77.
 I-88 between mile markers 83 and 120.
 I-90 between mile markers 20 and 56.

This includes...  Northern Illinois University, Sandwich Fairgrounds,
Aurora University, Boone County Fairgrounds, Elgin Community College,
Fermilab, IL Math and Science Academy, Kane County Cougars Ballpark,
Mchenry County College, Mchenry County Fairgrounds, Moraine Hills
State Park, Tri-County Fairgrounds, and Waubonsee Community College.

A Severe Thunderstorm Watch remains in effect until 1100 PM CDT for
north central Illinois.

LAT...LON 4249 8820 4215 8820 4215 8824 4207 8824
      4207 8826 4173 8826 4146 8859 4146 8916
      4163 8917 4163 8894 4250 8893
TIME...MOT...LOC 0108Z 296DEG 23KT 4248 8857 4203 8878 4169 8906

Borchardt

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE CHICAGO IL
814 PM CDT THU JUL 9 2020

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

0751 PM     TSTM WND GST     1 NNW LIBERTYVILLE      42.30N 87.96W
07/09/2020  M53 MPH          LAKE               IL   EMERGENCY MNGR

            MEASURED GUST TO 53 MPH LAKE COUNTY EOC.

&&

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE CHICAGO IL
820 PM CDT THU JUL 9 2020

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

0648 PM     TSTM WND DMG     LONG GROVE              42.18N 88.00W
07/09/2020                   LAKE               IL   PUBLIC

            A LARGE TREE LIMB WAS BLOWN DOWN. PHOTO
            SHARED ON FACEBOOK. TIME ESTIMATED.

&&

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE CHICAGO IL
848 PM CDT THU JUL 9 2020

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

0606 PM     TSTM WND GST     DUPAGE AIRPORT          41.91N 88.26W
07/09/2020  M48 MPH          DUPAGE             IL   ASOS

            MEASURED GUST TO 48 MPH.

&&

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE CHICAGO IL
856 PM CDT THU JUL 9 2020

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

0641 PM     TSTM WND DMG     PALATINE                42.11N 88.04W
07/09/2020                   COOK               IL   PUBLIC

            LARGE TREE LIMB BLOWN DOWN. PHOTO SHARED ON
            FACEBOOK. TIME ESTIMATED.

&&