Alert archive / Indiana / Severe Thunderstorm Warnings in 2019

Severe Thunderstorm Warning 147, NWS Northern Indiana

August 18, 20194 counties in Indiana

NWS Northern Indiana issued this severe thunderstorm warning at Aug 18, 2019, 7:46 PM EDT for 4 counties in Indiana. It was in force for 29 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued
Aug 18, 2019, 7:46 PM EDT (23:46 UTC)
Expired
Aug 18, 2019, 8:15 PM EDT
In force
29 min
Issued by
NWS Northern Indiana
Area
Storm-based polygon
Hail
0.75 in
Wind
60.0 mph

Counties Allen County, IN, DeKalb County, IN, Noble County, IN, Whitley County, IN

The radar

The Northern Indiana radar (KIWX), 39 km from the middle of the area, began a volume at 23:49 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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

IssuedProductOfficeLasted
Aug 18, 3:24 PM EDTSevere Thunderstorm WatchSPC7 hr

The nearest sounding before it

Detroit, MI (KDTX), launched 12:00Z, 11.8 hours before the alert went out and 221 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, Detroit, MI at 12:00Z on 2019-08-18Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 453 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, Detroit, MI at 12:00Z on 2019-08-18The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 106 square meters per square second.19395878Sfc1 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
453 J/kg
Mixed-layer CIN
-45 J/kg
Mixed-layer LCL
727 m above ground
0-6 km bulk shear
29 kt
0-1 km storm-relative helicity
106 m²/s²
0-3 km storm-relative helicity
101 m²/s²
Significant tornado parameter
0.1
Supercell composite
1.9

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this severe thunderstorm warning 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 severe thunderstorm warning went out at Aug 18, 6:35 PM EDT, 1 hour 11 minutes earlier.

Area forecast discussion, Aug 18, 6:35 PM EDT, 1 hour 11 minutes before
Area Forecast Discussion
National Weather Service Northern Indiana
635 PM EDT Sun Aug 18 2019

.SYNOPSIS...
Issued at 627 PM EDT Sun Aug 18 2019

Scattered thunderstorms will role east through the area into the
evening. An isolated strong to severe thunderstorm will be
possible, best chances along and southeast of US 24.
Periodic low chances for showers and thunderstorms and warm
temperatures will persist into Monday and Tuesday, followed by
cool and dry conditions Wednesday through Saturday.

&&

.SHORT TERM...(This Evening through Monday)
Issued at 233 PM EDT Sun Aug 18 2019

MLCAPE has increased to near 2000 j/kg and CIN has largely eroded
along and in advance of a composite outflow boundary draped near
the US 24 corridor. Coverage is rather isolated as of 1815z but
expected to increase mid-late afternoon as a convectively aided
impulse approaches from the Mid MS Valley. Most of this activity
is expected along/southeast of US 24, though additional
development possible on the edge of stable bubble to the north as
boundary layer attempts to recover with outflows in the vicinity.
Effective shear values in the 25-30 kt range and moderate
instability may be enough to support a few strong to severe storms
with wind the primary threat.

Chances for showers/storms diminish later this evening into
Monday morning behind these series of shortwaves, though a few
leftover showers not out of the question as the main synoptic cold
front and pooled moisture drop in from the northwest. Fog and
stratus may be able to fill in otherwise later tonight given ample
low level moisture. This remnant moisture and diurnal heating may
contribute to iso-sct convection by Monday afternoon near the
weak front. Storms should stay below severe limits and mainly
confined to southern/eastern zones.

&&

.LONG TERM...(Monday Night through Sunday)
Issued at 233 PM EDT Sun Aug 18 2019

The next chance for a round of convection will come later Tuesday
into Tuesday night as the next convective complex and associated
theta-e surge rides the northeast fringe of a persistent south-
central CONUS upper ridge. This convection will pose a severe
threat, though higher probabilities appear to be west of the IWX
CWA at this time. Quiet weather and lower humidity then becomes
the story mid-late week as negative height anomaly dropping into
southeast Canada finally forces active frontal zone off to the
south.

&&

.AVIATION...(For the 00Z TAFS through 00Z Monday Evening)
Issued at 627 PM EDT Sun Aug 18 2019

A shortwave will bring scattered convection through KFWA early
this evening. Brief MVFR/IFR restrictions can be expected with
this activity, with a low chance for a strong to severe storm
(hail & wind). Mainly dry and VFR otherwise into tonight. A
frontal boundary will then drop into northern IN Monday morning
with MVFR cigs/vis possible.

&&

.IWX WATCHES/WARNINGS/ADVISORIES...
IN...NONE.
MI...NONE.
OH...NONE.
LM...NONE.
&&

SYNOPSIS...Steinwedel
SHORT TERM...Steinwedel
LONG TERM...Steinwedel
AVIATION...Steinwedel

Visit us at www.weather.gov/iwx

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Hazardous weather outlook, Aug 18, 3:30 PM EDT, 4 hours 16 minutes before
Hazardous Weather Outlook...UPDATED
National Weather Service Northern Indiana
330 PM EDT Sun Aug 18 2019

INZ003-004-MIZ077-078-191930-
La Porte-St. Joseph IN-Berrien-Cass MI-
330 PM EDT Sun Aug 18 2019 /230 PM CDT Sun Aug 18 2019/

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

.DAY ONE...This afternoon and tonight.

There is a chance for thunderstorms this afternoon. An isolated
strong storm is possible.

.DAYS TWO THROUGH SEVEN...Monday through Saturday.

Thunderstorms are possible Monday through Wednesday. A strong storm
capable of gusty winds and locally heavy rainfall can't be ruled
out.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not expected at this time.

INZ005>009-012>016-020-MIZ079>081-OHZ001-002-191930-
Elkhart-Lagrange-Steuben-Noble-De Kalb-Starke-Pulaski-Marshall-
Fulton IN-Kosciusko-White-St. Joseph MI-Branch-Hillsdale-Williams-
Fulton OH-
330 PM EDT Sun Aug 18 2019 /230 PM CDT Sun Aug 18 2019/

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

.DAY ONE...This afternoon and tonight.

Scattered thunderstorms are expected this afternoon into
early this evening. Storms may become strong to severe,
capable of producing gusty winds, hail and locally heavy rainfall.

.DAYS TWO THROUGH SEVEN...Monday through Saturday.

Thunderstorms are possible Monday through Wednesday. A strong storm
capable of gusty winds and locally heavy rainfall can't be ruled
out.

.SPOTTER INFORMATION STATEMENT...

Spotter activation may be needed late this afternoon.

INZ017-018-022>027-032>034-OHZ004-005-015-016-024-025-191930-
Whitley-Allen IN-Cass IN-Miami-Wabash-Huntington-Wells-Adams-Grant-
Blackford-Jay-Defiance-Henry-Paulding-Putnam-Van Wert-Allen OH-
330 PM EDT Sun Aug 18 2019

...SEVERE THUNDERSTORM WATCH 599 IN EFFECT UNTIL 10 PM EDT THIS
EVENING...

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

.DAY ONE...This afternoon and tonight.

Please listen to NOAA Weather Radio or go to weather.gov on the
Internet for more information about the following hazards.

   Severe Thunderstorm Watch.

Scattered thunderstorms are expected this afternoon into
early this evening. Storms may become strong to severe,
capable of producing gusty winds, hail and locally heavy rainfall.

.DAYS TWO THROUGH SEVEN...Monday through Saturday.

Thunderstorms are possible Monday through Wednesday. A strong storm
capable of gusty winds and locally heavy rainfall can't be ruled
out.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is requested this afternoon into early this
evening.

LMZ043-046-191930-
New Buffalo MI to St Joseph MI-Michigan City IN to New Buffalo MI-
330 PM EDT Sun Aug 18 2019

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

.DAY ONE...This afternoon and tonight.

Hazardous weather is not expected at this time.

.DAYS TWO THROUGH SEVEN...Monday through Saturday.

There is a chance for thunderstorms at times between Monday through
Wednesday.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not expected at this time.

In the hours before

Local storm report, Aug 18, 7:14 PM EDT, 32 minutes before
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Local storm report, Aug 18, 7:18 PM EDT, 28 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORTHERN INDIANA
718 PM EDT SUN AUG 18 2019

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

0717 PM     HAIL             WATERFORD MILLS         41.55N 85.83W
08/18/2019  E0.25 INCH       ELKHART            IN   BROADCAST MEDIA

            RELAYED VIA NWS CHAT.

&&

BROWN
Special weather statement, Aug 18, 7:23 PM EDT, 23 minutes before
Special Weather Statement
National Weather Service Northern Indiana
723 PM EDT Sun Aug 18 2019

INZ008-009-016>018-190000-
Noble-Whitley-Kosciusko-Allen-De Kalb-
723 PM EDT Sun Aug 18 2019

...A STRONG THUNDERSTORM WILL AFFECT NORTHWESTERN ALLEN...
SOUTHEASTERN NOBLE...WHITLEY...SOUTHWESTERN DE KALB AND SOUTHEASTERN
KOSCIUSKO COUNTIES...

At 723 PM EDT, a strong thunderstorm was located over Tri-lakes,
moving east at 25 mph.

Winds in excess of 40 mph and pea size hail are possible with this
storm.

Locations impacted include...
Fort Wayne, Warsaw, Columbia City, Garrett, Winona Lake, Tri-lakes,
Huntertown, Avilla, Churubusco, South Whitley, Pierceton, Swan, Etna,
Larwill, Altona, Sidney, Ridinger Lake, Butler Center, Saint Johns
and Lorane.

This includes the following highways...
 Interstate 469 between mile markers 27 and 30.
 Interstate 69 in Indiana between mile markers 310 and 327.

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

&&

LAT...LON 4105 8568 4105 8577 4122 8585 4141 8511
      4115 8503 4104 8568
TIME...MOT...LOC 2323Z 257DEG 23KT 4121 8553

HAIL...0.25IN
WIND...40MPH

CR
Local storm report, Aug 18, 7:30 PM EDT, 16 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORTHERN INDIANA
730 PM EDT SUN AUG 18 2019

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

0730 PM     HAIL             2 ENE WEST JEFFERSON    41.59N 84.52W
08/18/2019  E0.25 INCH       WILLIAMS           OH   TRAINED SPOTTER

            RELAYED VIA PHONE.

&&

BROWN
Special weather statement, Aug 18, 7:32 PM EDT, 14 minutes before
Special Weather Statement
National Weather Service Northern Indiana
732 PM EDT Sun Aug 18 2019

OHZ001-002-190015-
Fulton-Williams-
732 PM EDT Sun Aug 18 2019

...A STRONG THUNDERSTORM WILL AFFECT NORTHWESTERN FULTON AND EASTERN
WILLIAMS COUNTIES...

At 732 PM EDT, a strong thunderstorm was located over West Unity, or
7 miles east of Montpelier, moving northeast at 30 mph.

Wind gusts up to 50 mph and half inch hail are possible with this
storm.

Locations impacted include...
Archbold, West Unity, Pioneer, Stryker, Fayette, Holiday City,
Metamora, Lyons, Oakshade, Alvordton, Zone, Seward, Denson, Winameg,
Elmira, Tedrow, Ottokee and Kunkle.

This includes Interstate 80 in Ohio between mile markers 13 and 35.

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

Frequent cloud to ground lightning is occurring with this storm.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.

&&

LAT...LON 4166 8394 4147 8448 4165 8459 4170 8454
      4172 8388 4171 8388
TIME...MOT...LOC 2332Z 247DEG 26KT 4160 8445

HAIL...0.50IN
WIND...50MPH

SLL
Special weather statement, Aug 18, 7:40 PM EDT, 6 minutes before
Special Weather Statement
National Weather Service Northern Indiana
740 PM EDT Sun Aug 18 2019

INZ006>009-190030-
Lagrange-Noble-De Kalb-Steuben-
740 PM EDT Sun Aug 18 2019

...AN AREA OF STRONG THUNDERSTORMS WILL AFFECT STEUBEN...CENTRAL
NOBLE...NORTHWESTERN DE KALB AND EASTERN LAGRANGE COUNTIES...

At 740 PM EDT, strong thunderstorms were clustered near Rome City, or
7 miles southeast of Lagrange, moving east at 30 mph.

Wind gusts of 50 to 55 mph and pea size hail are possible with this
storm.

Locations impacted include...
Auburn, Kendallville, Angola, Garrett, Lagrange, Avilla, Albion,
Waterloo, Fremont, Rome City, Wolcottville, Ashley, Hudson, Orland,
Clear Lake, Corunna, Altona, Brimfield, Flint and Fairfield Center.

This includes the following highways...
 Interstate 69 in Indiana between mile markers 328 and 357.
 Interstate 80 in Indiana between mile markers 126 and 129, and
between mile markers 137 and 152.

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

Frequent cloud to ground lightning is occurring with this storm.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.

&&

LAT...LON 4174 8481 4135 8507 4134 8562 4175 8534
      4176 8481
TIME...MOT...LOC 2340Z 269DEG 25KT 4155 8536

HAIL...0.25IN
WIND...55MPH

SLL

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 18, 6:34 AM EDTSpecial Weather StatementIWXStarke41 min
Aug 18, 7:18 AM EDTSpecial Weather StatementIWXAllen, Whitley27 min
Aug 18, 7:21 AM EDTSpecial Weather StatementIWXWhitley24 min
Aug 18, 7:37 AM EDTSpecial Weather StatementIWXAllen38 min
Aug 18, 7:43 AM EDTSpecial Weather StatementIWXKosciusko32 min
Aug 18, 8:01 AM EDTSpecial Weather StatementIWXLaGrange29 min
Aug 18, 8:15 AM EDTSpecial Weather StatementIWXDeKalb, Noble45 min
Aug 18, 8:22 AM EDTSpecial Marine WarningIWX113 min
Aug 18, 8:29 AM EDTSpecial Weather StatementIWXSteuben46 min
Aug 18, 8:51 AM EDTSpecial Weather StatementIWXLaPorte39 min
Aug 18, 9:05 AM EDTAreal Flood AdvisoryIWXAllen3 hr
Aug 18, 9:44 AM EDTSpecial Weather StatementIWXElkhart, Saint Joseph46 min
Aug 18, 10:17 AM EDTSpecial Marine WarningIWX118 min
Aug 18, 10:20 AM EDTSpecial Weather StatementIWXElkhart, Marshall40 min
Aug 18, 10:39 AM EDTSpecial Weather StatementIWXLaGrange36 min
Aug 18, 10:59 AM EDTSpecial Weather StatementIWXNoble46 min
Aug 18, 11:07 AM EDTSpecial Weather StatementIWXPulaski38 min
Aug 18, 12:09 PM EDTSpecial Weather StatementIWXDeKalb36 min
Aug 18, 6:38 PM EDTSpecial Weather StatementIWXElkhart, LaGrange, Noble37 min
Aug 18, 7:12 PM EDTSpecial Weather StatementIWXElkhart48 min
Aug 18, 7:23 PM EDTSpecial Weather StatementIWXWhitley37 min
Aug 18, 7:40 PM EDTSpecial Weather StatementIWXNoble, Steuben50 min
Aug 18, 2:30 AM EDTSpecial Weather StatementIWXVan Wert45 min
Aug 18, 3:19 AM EDTSpecial Weather StatementIWXAllen26 min
Aug 18, 5:42 AM EDTSpecial Weather StatementIWXAllen63 min
Aug 18, 8:10 AM EDTSpecial Weather StatementIWXPaulding35 min
Aug 18, 8:21 AM EDTSpecial Weather StatementIWXDefiance39 min
Aug 18, 8:43 AM EDTSpecial Weather StatementIWXPaulding47 min
Aug 18, 9:12 AM EDTSpecial Weather StatementIWXHenry33 min
Aug 18, 9:28 AM EDTSpecial Weather StatementIWXPutnam47 min
Aug 18, 12:45 PM EDTSpecial Weather StatementIWXFulton30 min
Aug 18, 2:21 PM EDTSevere Thunderstorm WarningIWXDefiance, Fulton, Henry, Williams39 min
Aug 18, 2:57 PM EDTSevere Thunderstorm WarningIWXDefiance, Henry33 min
Aug 18, 3:05 PM EDTSpecial Weather StatementIWXDefiance25 min
Aug 18, 3:16 PM EDTSpecial Weather StatementIWXPutnam29 min
Aug 18, 3:25 PM EDTSpecial Weather StatementIWXHenry35 min
Aug 18, 3:27 PM EDTSpecial Weather StatementIWXDefiance33 min
Aug 18, 3:42 PM EDTSevere Thunderstorm WarningIWXHenry, Putnam33 min
Aug 18, 4:14 PM EDTSevere Thunderstorm WarningIWXHenry, Putnam31 min
Aug 18, 7:32 PM EDTSpecial Weather StatementIWXFulton43 min
Aug 18, 10:53 AM EDTSpecial Weather StatementIWXBerrien52 min
Aug 18, 6:19 PM EDTSpecial Weather StatementIWXSaint Joseph26 min
Aug 18, 6:43 PM EDTSpecial Weather StatementIWXBranch47 min

Nearby

Severe Thunderstorm Warnings in Indiana, 2019Every severe thunderstorm warning in 2019

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.