Alert archive / Indiana / Special Weather Statements in 2018

Special Weather Statement, NWS Northern Indiana

August 20, 2018Whitley County, Indiana

NWS Northern Indiana issued this special weather statement at Aug 20, 2018, 4:00 PM EDT for Whitley County, Indiana. It was in force for 30 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
Aug 20, 2018, 4:00 PM EDT (20:00 UTC)
Expired
Aug 20, 2018, 4:30 PM EDT
In force
30 min
Issued by
NWS Northern Indiana

County Whitley County, IN

The radar

The Northern Indiana radar (KIWX), 52 km from the middle of the area, began a volume at 20:04 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

Cncnati-Daytn, OH (KILN), launched 12:00Z, 8.0 hours before the alert went out and 216 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-pSkew-T log-p diagram, Cncnati-Daytn, OH at 12:00Z on 2018-08-20Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 5 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Cncnati-Daytn, OH at 12:00Z on 2018-08-20The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 44 square meters per square second.1939Sfc1 km3 km6 km9 kmRMLM
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
5 J/kg
Mixed-layer CIN
-102 J/kg
Mixed-layer LCL
1048 m above ground
0-6 km bulk shear
28 kt
0-1 km storm-relative helicity
44 m²/s²
0-3 km storm-relative helicity
70 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

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 Northern Indiana wrote its last area forecast discussion before this special weather statement went out at Aug 20, 2:02 PM EDT, 1 hour 58 minutes earlier.

Area forecast discussion, Aug 20, 2:02 PM EDT, 1 hour 58 minutes before
Area Forecast Discussion
National Weather Service Northern Indiana
202 PM EDT Mon Aug 20 2018

.SYNOPSIS...
Issued at 421 AM EDT Mon Aug 20 2018

An upper level disturbance will move across the area later today and
tonight. Showers and some storms will spread across the area through
this afternoon and persist through much of Tuesday. Rainfall amounts
will range from one to three inches. Drier, cooler and less humid
weather will follow on Wednesday. Highs will be in the 70s
Wednesday through Friday.

&&

.SHORT TERM...(Tonight and Tuesday)
Issued at 202 PM EDT Mon Aug 20 2018

Leading edge of warm advection wing now lifting into swrn zones this
hour and will overspread remainder of cwa through this evening. More
erstwhile development expected overnight ahead of sfc occlusion
timed with maximizing low level moisture flux and more spirited
forcing. Substantial warm cloud depth/pwat suggest some significant
rains likely of which may yield some runoff problems overnight
pending evolution/alignment of convective elements.

Otherwise system opens quickly late tonight and will accelerate ne
into ON. Lingering showers along low level trough axis will decay
through mid morning Tue east while new development follows in the
late morning/early aftn as upper trough axis pivots through.

&&

.LONG TERM...(Tuesday night through Sunday)
Issued at 202 PM EDT Mon Aug 20 2018

Slow clearing Tue night will accelerate on Wed as ridging sfc and
aloft build into the area. Very pleasant seasonably cool and dry
weather then through Fri.

Minor disturbance over the nrn Rockies this aftn will kickout
through the Dakotas late Thu and into swrn ON late Fri. Warm
advection push ahead of this system will bring a another chance for
rain Fri night/early Sat. Thereafter substantial height rises aloft
to ensue as mid level ridge builds into the OH valley with much
warmer temps expected next weekend and through much of next week.

&&

.AVIATION...(For the 18Z TAFS through 18Z Tuesday Afternoon)
Issued at 130 PM EDT Mon Aug 20 2018

KIWX radar indicating line of showers with embedded thunder moving
into the area this afternoon. This is in association with warm front
lifting north that extends from low pressure center over Iowa.
Elevated instability ahead of the front along with better surface
based destabilization in warm sector behind warm front will allow
for thunder mention focused on this afternoon/evening. Showers
continue through the TAF period as system lifts northeast into the
great lakes region Tuesday. Will stay with MVFR cigs and
visibilities for now and monitor this evening and amend as needed.
Winds will veer through the period from southeast to westerly.

&&

.IWX WATCHES/WARNINGS/ADVISORIES...
IN...Beach Hazards Statement from Tuesday afternoon through Wednesday
     evening for INZ003.

MI...Beach Hazards Statement from Tuesday afternoon through Wednesday
     evening for MIZ077.

OH...NONE.
LM...Small Craft Advisory from 2 PM Tuesday to 8 PM EDT Wednesday for
     LMZ043-046.

&&

SYNOPSIS...Skipper/T
SHORT TERM...T
LONG TERM...T
AVIATION...Logsdon

Visit us at www.weather.gov/iwx

Follow us on Facebook...Twitter...and YouTube at:
www.facebook.com/NWSNorthernIndiana
www.twitter.com/nwsiwx
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Hazardous weather outlook, Aug 20, 5:44 AM EDT, 10 hours 16 minutes before
Hazardous Weather Outlook
National Weather Service Northern Indiana
544 AM EDT Mon Aug 20 2018

INZ004>009-012>018-020-022>027-032>034-MIZ078-079-081-OHZ001-002-004-
005-015-016-024-025-210945-
St. Joseph IN-Elkhart-Lagrange-Steuben-Noble-De Kalb-Starke-Pulaski-
Marshall-Fulton IN-Kosciusko-Whitley-Allen IN-White-Cass IN-Miami-
Wabash-Huntington-Wells-Adams-Grant-Blackford-Jay-Cass MI-
St. Joseph MI-Hillsdale-Williams-Fulton OH-Defiance-Henry-Paulding-
Putnam-Van Wert-Allen OH-
544 AM EDT Mon Aug 20 2018 /444 AM CDT Mon Aug 20 2018/

This Hazardous Weather Outlook is for northern Indiana, southwest
Michigan and northwest Ohio.

.DAY ONE...Today and tonight.

Showers and thunderstorms will become likely this afternoon into
tonight. A strong storm with gusty winds and locally heavy rainfall
is possible.

.DAYS TWO THROUGH SEVEN...Tuesday through Sunday.

Thunderstorms are possible Tuesday. Severe storms are not expected.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not expected at this time.

INZ003-MIZ077-210945-
La Porte-Berrien-
544 AM EDT Mon Aug 20 2018 /444 AM CDT Mon Aug 20 2018/

...BEACH HAZARDS STATEMENT IN EFFECT FROM TUESDAY AFTERNOON THROUGH
WEDNESDAY EVENING...

This Hazardous Weather Outlook is for northern Indiana and
southwest Michigan.

.DAY ONE...Today and tonight.

Showers and thunderstorms will become likely this afternoon into
tonight. Severe storms are not expected.

.DAYS TWO THROUGH SEVEN...Tuesday through Sunday.

Please listen to NOAA Weather Radio or go to weather.gov on the
Internet for more information about the Beach Hazards Statement.
This statement includes dangerous swimming conditions along the
southeast shore of Lake Michigan Tuesday into Wednesday.

Thunderstorms are possible Tuesday. Severe storms are not expected.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not expected at this time.

MIZ080-210945-
Branch-
544 AM EDT Mon Aug 20 2018

...FLASH FLOOD WATCH IN EFFECT UNTIL 4 PM EDT THIS AFTERNOON...

This Hazardous Weather Outlook is for southwest Michigan.

.DAY ONE...Today and tonight.

Please listen to NOAA Weather Radio or go to weather.gov on the
Internet for more information about the Flash Flood Watch.

Showers and thunderstorms will become likely this afternoon into
tonight. Severe storms are not expected, but a few storms may produce
gusty winds. Locally heavy rainfall is also possible.

.DAYS TWO THROUGH SEVEN...Tuesday through Sunday.

Thunderstorms are possible Tuesday. Severe storms are not expected.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not expected at this time.

LMZ043-046-210945-
New Buffalo MI to St Joseph MI-Michigan City IN to New Buffalo MI-
544 AM EDT Mon Aug 20 2018

This Hazardous Weather Outlook is for The Nearshore Waters of
Southeastern Lake Michigan.

.DAY ONE...Today and tonight.

Scattered thunderstorms are expected this afternoon into tonight.
Severe storms are not expected.

.DAYS TWO THROUGH SEVEN...Tuesday through Sunday.

Thunderstorms are possible Tuesday. Severe storms are not expected.

Hazardous conditions for small craft are expected Tuesday into
Wednesday.

In the hours before

Special weather statement, Aug 20, 3:25 PM EDT, 35 minutes before
Special Weather Statement
National Weather Service Northern Indiana
325 PM EDT MON AUG 20 2018

INZ025-032-201945-
Huntington-Grant-
325 PM EDT MON AUG 20 2018

...A STRONG THUNDERSTORM WILL AFFECT GRANT AND SOUTHWESTERN
HUNTINGTON COUNTIES...

At 322 PM EDT, a strong thunderstorm was located over Jonesboro, or
over Gas City, moving northeast at 25 mph.

Wind gusts up to 50 mph and pea size hail are possible with this
storm.

Locations impacted include...
Marion, Gas City, Upland, Fairmount, Jonesboro, Van Buren, Matthews,
Warren, Fowlerton, Home Corner, Michaelsville, Landess, Hanfield,
Banquo, Radley, Lake Wood, Arcana, Pleasant Plain and Hackleman.

This includes Interstate 69 in Indiana between mile markers 252 and
275.

The National Weather Service and local Emergency Management will
continue to closely monitor the situation. If you observe a funnel
cloud, stay calm and seek shelter in a sturdy building until the
funnel cloud has passed or dissipated. Please report any funnel cloud
sightings to the Northern Indiana  National Weather Service via Law
Enforcement or Social Media.

&&

LAT...LON 4038 8576 4065 8568 4065 8564 4071 8564
      4069 8541 4065 8541 4065 8545 4038 8544
TIME...MOT...LOC 1922Z 208DEG 22KT 4047 8562

Brown
Special weather statement, Aug 20, 3:28 PM EDT, 32 minutes before
Special Weather Statement
National Weather Service Northern Indiana
328 PM EDT MON AUG 20 2018

INZ015-023-202000-
Miami-Fulton-
328 PM EDT MON AUG 20 2018

...A STRONG THUNDERSTORM WILL AFFECT EAST CENTRAL FULTON AND
NORTHWESTERN MIAMI COUNTIES...

At 328 PM EDT, a strong thunderstorm was located near Mexico, or 8
miles north of Peru, moving north at 25 mph.

Wind gusts up to 50 mph and pea size hail are possible with this
storm.

Locations impacted include...
Akron, Mexico, Denver, Macy, Chili, Deedsville, Gilead and Disko.

The National Weather Service and local Emergency Management will
continue to closely monitor the situation. If you observe a funnel
cloud, stay calm and seek shelter in a sturdy building until the
funnel cloud has passed or dissipated. Please report any funnel cloud
sightings to the Northern Indiana  National Weather Service via Law
Enforcement or Social Media.

&&

LAT...LON 4084 8614 4105 8612 4104 8602 4104 8595
      4098 8594 4081 8602
TIME...MOT...LOC 1928Z 198DEG 21KT 4088 8607

Brown
Local storm report, Aug 20, 3:33 PM EDT, 27 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORTHERN INDIANA
333 PM EDT MON AUG 20 2018

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

0325 PM     HEAVY RAIN       2 NE BUNKER HILL        40.68N 86.07W
08/20/2018  M1.20 INCH       MIAMI              IN   AMATEUR RADIO

            THE DURATION OF THE HEAVY RAIN EVENT WAS 40
            MINUTES.

&&

MSL
Special weather statement, Aug 20, 3:42 PM EDT, 18 minutes before
Special Weather Statement
National Weather Service Northern Indiana
342 PM EDT MON AUG 20 2018

INZ017-024-025-202015-
Wabash-Whitley-Huntington-
342 PM EDT MON AUG 20 2018

...A STRONG THUNDERSTORM WILL AFFECT EAST CENTRAL WABASH...SOUTH
CENTRAL WHITLEY AND NORTHERN HUNTINGTON COUNTIES...

At 341 PM EDT, a strong thunderstorm was located over Huntington,
moving northeast at 30 mph.

Wind gusts up to 50 mph and pea size hail are possible with this
storm.

Locations impacted include...
Huntington, Andrews, Roanoke, Tunker, Laud, Washington Center,
Bowerstown, Mahon, Bippus, Bracken, Goblesville and Luther.

Torrential rainfall is also occurring with this storm, and may cause
localized flooding. Do not drive your vehicle through flooded
roadways.

&&

LAT...LON 4089 8574 4110 8553 4098 8533 4095 8534
      4076 8553
TIME...MOT...LOC 1941Z 217DEG 25KT 4088 8556

Brown
Special weather statement, Aug 20, 3:44 PM EDT, 16 minutes before
Special Weather Statement
National Weather Service Northern Indiana
344 PM EDT MON AUG 20 2018

INZ025-026-032-033-202015-
Huntington-Blackford-Wells-Grant-
344 PM EDT MON AUG 20 2018

...A STRONG THUNDERSTORM WILL AFFECT NORTHEASTERN GRANT...
NORTHWESTERN BLACKFORD...SOUTHEASTERN HUNTINGTON AND SOUTHWESTERN
WELLS COUNTIES...

At 344 PM EDT, a strong thunderstorm was located near Upland, moving
northeast at 20 mph.

Wind gusts up to 50 mph and pea size hail are possible with this
storm.

Locations impacted include...
Marion, Gas City, Upland, Jonesboro, Van Buren, Warren, Lancaster,
Mcnatts, Home Corner, Landess, Liberty Center, Mount Zion, Plum Tree,
Hanfield, Buckeye, Majenica, Roll, Lake Wood, Arcana and Pleasant
Plain.

This includes Interstate 69 in Indiana between mile markers 259 and
280.

The National Weather Service and local Emergency Management will
continue to closely monitor the situation. If you observe a funnel
cloud, stay calm and seek shelter in a sturdy building until the
funnel cloud has passed or dissipated. Please report any funnel cloud
sightings to the Northern Indiana  National Weather Service via Law
Enforcement or Social Media.

Torrential rainfall is also occurring with this storm, and may cause
localized flooding. Do not drive your vehicle through flooded
roadways.

&&

LAT...LON 4045 8543 4049 8566 4080 8552 4070 8523
TIME...MOT...LOC 1944Z 206DEG 19KT 4053 8551

Brown
Special weather statement, Aug 20, 4:00 PM EDT, 0 minutes before
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The office that day

Everything else NWS Northern Indiana issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Aug 20, 4:16 AM EDTSmall Craft AdvisoryIWX64 hr
Aug 20, 4:18 AM EDTBeach Hazards StatementIWX64 hr
Aug 20, 2:25 PM EDTSevere Thunderstorm WarningIWXCass, Miami50 min
Aug 20, 2:38 PM EDTSevere Thunderstorm WarningIWXGrant, Miami, Wabash52 min
Aug 20, 3:05 PM EDTSpecial Weather StatementIWXGrant25 min
Aug 20, 3:12 PM EDTSpecial Weather StatementIWXWabash33 min
Aug 20, 3:25 PM EDTSpecial Weather StatementIWXGrant20 min
Aug 20, 3:28 PM EDTSpecial Weather StatementIWXMiami32 min
Aug 20, 3:42 PM EDTSpecial Weather StatementIWXHuntington33 min
Aug 20, 3:44 PM EDTSpecial Weather StatementIWXBlackford31 min
Aug 20, 3:58 PM EDTAreal Flood AdvisoryIWXGrant2 hr
Aug 20, 4:03 PM EDTSpecial Weather StatementIWXWells27 min
Aug 20, 4:16 PM EDTAreal Flood AdvisoryIWXAdams, Allen, Blackford, Huntington, Jay, Wells and 1 more119 min
Aug 20, 4:23 PM EDTSpecial Weather StatementIWXWhitley37 min
Aug 20, 4:27 PM EDTSpecial Weather StatementIWXWells33 min
Aug 20, 4:37 PM EDTSpecial Weather StatementIWXWells23 min
Aug 20, 4:40 PM EDTSpecial Weather StatementIWXAllen35 min
Aug 20, 4:43 PM EDTSevere Thunderstorm WarningIWXAdams, Allen, Wells21 min
Aug 20, 5:00 PM EDTSpecial Weather StatementIWXAllen30 min
Aug 20, 7:00 PM EDTSpecial Weather StatementIWXWhite30 min
Aug 20, 7:23 PM EDTSpecial Weather StatementIWXWhite37 min
Aug 20, 7:32 PM EDTSevere Thunderstorm WarningIWXCass, White23 min
Aug 20, 7:44 PM EDTAreal Flood AdvisoryIWXBlackford, Grant, Huntington, Miami, Wabash, Wells and 1 more90 min
Aug 20, 7:54 PM EDTSevere Thunderstorm WarningIWXCass, Fulton, Pulaski51 min
Aug 20, 5:23 PM EDTSpecial Weather StatementIWXPaulding37 min
Aug 20, 5:37 PM EDTSpecial Weather StatementIWXVan Wert23 min
Aug 20, 5:51 PM EDTSpecial Weather StatementIWXPaulding24 min
Aug 20, 5:58 PM EDTSpecial Weather StatementIWXVan Wert32 min
Aug 20, 6:25 PM EDTSpecial Weather StatementIWXPaulding35 min
Aug 20, 6:38 PM EDTSpecial Weather StatementIWXAllen37 min
Aug 20, 7:07 PM EDTSpecial Weather StatementIWXPaulding23 min
Aug 20, 7:32 PM EDTAreal Flood AdvisoryIWXDefiance, Henry, Paulding, Putnam3 hr

Nearby

Special Weather Statements in Indiana, 2018Every special weather statement in 2018

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.