Alert archive / Indiana / Special Weather Statements in 2018

Special Weather Statement, NWS Northern Indiana

August 11, 2018DeKalb County, Indiana

NWS Northern Indiana issued this special weather statement at Aug 11, 2018, 6:55 PM EDT for DeKalb County, Indiana. It was in force for 50 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 11, 2018, 6:55 PM EDT (22:55 UTC)
Expired
Aug 11, 2018, 7:45 PM EDT
In force
50 min
Issued by
NWS Northern Indiana

County DeKalb County, IN

The radar

The Northern Indiana radar (KIWX), 70 km from the middle of the area, began a volume at 22:57 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

Detroit, MI (KDTX), launched 12:00Z, 10.9 hours before the alert went out and 190 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 2018-08-11Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 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 2018-08-11The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -9 square meters per square second.193958Sfc1 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
1859 m above ground
0-6 km bulk shear
24 kt
0-1 km storm-relative helicity
-9 m²/s²
0-3 km storm-relative helicity
9 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 11, 2:00 PM EDT, 4 hours 55 minutes earlier.

Area forecast discussion, Aug 11, 2:00 PM EDT, 4 hours 55 minutes before
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Hazardous weather outlook, Aug 11, 5:48 AM EDT, 13 hours 7 minutes before
Hazardous Weather Outlook
National Weather Service Northern Indiana
548 AM EDT Sat Aug 11 2018

INZ026-027-033-034-MIZ077-078-OHZ024-025-121000-
Wells-Adams-Blackford-Jay-Berrien-Cass MI-Van Wert-Allen OH-
548 AM EDT Sat Aug 11 2018

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

.DAY ONE...Today and tonight.

There is a small chance for thunderstorms, mainly late this afternoon
and early this evening. Severe storms are not expected.

.DAYS TWO THROUGH SEVEN...Sunday through Friday.

There are periodic storm chances this upcoming week. Severe storms
are not expected.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not expected at this time.

INZ003>009-012>018-020-022>025-032-MIZ079>081-OHZ001-002-004-005-015-
016-121000-
La Porte-St. Joseph IN-Elkhart-Lagrange-Steuben-Noble-De Kalb-Starke-
Pulaski-Marshall-Fulton IN-Kosciusko-Whitley-Allen IN-White-Cass IN-
Miami-Wabash-Huntington-Grant-St. Joseph MI-Branch-Hillsdale-
Williams-Fulton OH-Defiance-Henry-Paulding-Putnam-
548 AM EDT Sat Aug 11 2018 /448 AM CDT Sat Aug 11 2018/

...DENSE FOG ADVISORY IN EFFECT UNTIL 9 AM EDT /8 AM CDT/ THIS
MORNING...

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

.DAY ONE...Today and tonight.

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

   Dense Fog Advisory.

Also, there is a small chance for thunderstorms, mainly late this
afternoon and early this evening. Severe storms are not expected.

.DAYS TWO THROUGH SEVEN...Sunday through Friday.

There are periodic storm chances this upcoming week. Severe storms
are not expected.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not expected at this time.

LMZ043-046-121000-
New Buffalo MI to St Joseph MI-Michigan City IN to New Buffalo MI-
548 AM EDT Sat Aug 11 2018

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

.DAY ONE...Today and tonight.

No hazardous weather is expected at this time.

.DAYS TWO THROUGH SEVEN...Sunday through Friday.

No hazardous weather is expected at this time.

In the hours before

Special weather statement, Aug 11, 5:54 PM EDT, 1 hour 1 minute before
Special Weather Statement
National Weather Service Northern Indiana
554 PM EDT SAT AUG 11 2018

OHZ001-002-004-005-112245-
Henry-Defiance-Fulton-Williams-
554 PM EDT SAT AUG 11 2018

...A STRONG THUNDERSTORM WILL AFFECT NORTH CENTRAL DEFIANCE...
NORTHWESTERN HENRY...WESTERN FULTON AND EASTERN WILLIAMS COUNTIES...

At 554 PM EDT, a strong thunderstorm was located over West Unity, or
7 miles east of Montpelier, moving south at 15 mph.

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

Locations impacted include...
Bryan, Wauseon, Archbold, Montpelier, West Unity, Stryker, Fayette,
Holiday City, West Jefferson, Pulaski, Ney, Evansport, Alvordton,
Pettisville, Zone, Ridgeville Corners, Elmira, Tedrow, Hallock and
Ottokee.

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

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 4148 8405 4137 8453 4166 8458 4171 8426
      4171 8420
TIME...MOT...LOC 2154Z 341DEG 14KT 4162 8446

GH
Special weather statement, Aug 11, 6:22 PM EDT, 33 minutes before
Special Weather Statement
National Weather Service Northern Indiana
622 PM EDT SAT AUG 11 2018

OHZ001-004-112300-
Defiance-Williams-
622 PM EDT SAT AUG 11 2018

...A STRONG THUNDERSTORM WILL AFFECT NORTHWESTERN DEFIANCE AND
SOUTHWESTERN WILLIAMS COUNTIES...

At 621 PM EDT, a strong thunderstorm was located near Edgerton, or 7
miles southwest of Montpelier, moving south at 20 mph.

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

Locations impacted include...
Bryan, Hicksville, Edgerton, Edgerton In Williams County, Farmer,
Ney, Blakeslee, Hallock, Williams Center, Melbern, Mark Center and
The Bend.

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 4125 8480 4153 8480 4157 8456 4129 8444
TIME...MOT...LOC 2221Z 342DEG 16KT 4150 8468

GH
Special weather statement, Aug 11, 6:55 PM EDT, 0 minutes before
Special Weather Statement
National Weather Service Northern Indiana
655 PM EDT SAT AUG 11 2018

INZ009-018-OHZ001-004-015-112345-
Allen-De Kalb-Defiance-Williams-Paulding-
655 PM EDT SAT AUG 11 2018

...A STRONG THUNDERSTORM WILL AFFECT NORTHEASTERN ALLEN...EASTERN DE
KALB...NORTHWESTERN DEFIANCE...NORTHWESTERN PAULDING AND SOUTHWESTERN
WILLIAMS COUNTIES...

At 655 PM EDT, a strong thunderstorm was located over Butler, moving
south at 20 mph.

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

Locations impacted include...
Hicksville, Butler, Edgerton, Grabill, St. Joe, Edgerton In Williams
County, Leo-cedarville, Concord, Newville, Cecil, Harlan,
Spencerville In Dekalb County, Moore, Cuba, Artic, Saint Joe and Mark
Center.

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 4148 8495 4152 8477 4123 8457 4116 8504
TIME...MOT...LOC 2255Z 339DEG 16KT 4142 8485

GH

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 11, 4:34 AM EDTDense Fog AdvisoryIWXAllen, Cass, DeKalb, Elkhart, Fulton, Grant and 11 more4 hr
Aug 11, 7:34 PM EDTSevere Thunderstorm WarningIWXAllen, DeKalb41 min
Aug 11, 5:54 PM EDTSpecial Weather StatementIWXFulton51 min
Aug 11, 6:22 PM EDTSpecial Weather StatementIWXDefiance, Williams38 min

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.