Alert archive / Indiana / Tornado Warnings in 2018

Tornado Warning 6, NWS Northern Indiana

August 7, 2018Steuben County, Indiana

NWS Northern Indiana issued this tornado warning at Aug 7, 2018, 4:52 PM EDT for Steuben County, Indiana. It was in force for 38 min. 1 report came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued
Aug 7, 2018, 4:52 PM EDT (20:52 UTC)
Expired
Aug 7, 2018, 5:30 PM EDT
In force
38 min
Issued by
NWS Northern Indiana
Area
Storm-based polygon
Tornado
Radar indicated
Hail
0.75 in

County Steuben County, IN

The radar

The Northern Indiana radar (KIWX), 72 km from the middle of the area, began a volume at 20:56 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.

What was reported inside it

TimeReportWhereRemark
Aug 7, 5:08 PM EDTTSTM WND DMG1 Ese Pleasant Lake, INA FEW SMALLER TREE LIMBS DOWN EAST OF PLEASANT LAKE ALONG BELLEFONTAINE RD. EM OBSERVED A WEAKLY ROTATING WALL CLOUD.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Detroit, MI (KDTX), launched 12:00Z, 8.9 hours before the alert went out and 174 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 2018-08-07Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 75 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Detroit, MI at 12:00Z on 2018-08-07The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 53 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
75 J/kg
Mixed-layer CIN
-67 J/kg
Mixed-layer LCL
772 m above ground
0-6 km bulk shear
32 kt
0-1 km storm-relative helicity
53 m²/s²
0-3 km storm-relative helicity
95 m²/s²
Significant tornado parameter
-0.0
Supercell composite
-0.1

Open this sounding in Storm Lab

The text

As transmitted.

948 
WFUS53 KIWX 072052
TORIWX
INC151-072130-
/O.NEW.KIWX.TO.W.0006.180807T2052Z-180807T2130Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Northern Indiana
452 PM EDT TUE AUG 7 2018

The National Weather Service in Northern Indiana  has issued a

* Tornado Warning for...
  Southeastern Steuben County in northeastern Indiana...

* Until 530 PM EDT.
    
* At 452 PM EDT, a severe thunderstorm capable of producing a tornado
  was located near Hamilton, or near Angola, moving east at 15 mph.

  HAZARD...Tornado.

  SOURCE...Radar indicated rotation.

  IMPACT...Flying debris will be dangerous to those caught without 
           shelter. Mobile homes will be damaged or destroyed. 
           Damage to roofs, windows, and vehicles will occur.  Tree 
           damage is likely.

* This dangerous storm will be near...
  Hamilton around 510 PM EDT.

Other locations impacted by this tornadic thunderstorm include
Alvarado, Berlien, Long Lake, Metz, Pleasant Lake, Hamilton Lake and
Golden Lake.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW! Move to a basement or an interior room on the lowest
floor of a sturdy building. Avoid windows. If you are outdoors, in a
mobile home, or in a vehicle, move to the closest substantial shelter
and protect yourself from flying debris.

&&

LAT...LON 4168 8481 4158 8480 4153 8481 4153 8492
      4155 8507 4163 8508
TIME...MOT...LOC 2052Z 265DEG 13KT 4157 8501 

TORNADO...RADAR INDICATED
HAIL...<.75IN

$$

MARSILI
3 follow-up statements
669 
WWUS53 KIWX 072104
SVSIWX

Severe Weather Statement
National Weather Service Northern Indiana
504 PM EDT TUE AUG 7 2018

INC151-072130-
/O.CON.KIWX.TO.W.0006.000000T0000Z-180807T2130Z/
Steuben IN-
504 PM EDT TUE AUG 7 2018

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 530 PM EDT FOR
SOUTHEASTERN STEUBEN COUNTY...
    
At 503 PM EDT, a severe thunderstorm capable of producing a tornado
was located over Hamilton, or near Angola, moving east at 15 mph.

HAZARD...Tornado.

SOURCE...Radar indicated rotation.

IMPACT...Flying debris will be dangerous to those caught without 
         shelter. Mobile homes will be damaged or destroyed. Damage 
         to roofs, windows, and vehicles will occur.  Tree damage is 
         likely.

This tornadic thunderstorm will remain over mainly rural areas of
southeastern Steuben County, including the following locations...
Hamilton Lake, Alvarado and Metz.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW! Move to a basement or an interior room on the lowest 
floor of a sturdy building. Avoid windows. Locations in the path of 
this dangerous storm include Hamilton Lake and Alvarado.

&&

LAT...LON 4163 8481 4158 8480 4154 8481 4154 8499
      4162 8501
TIME...MOT...LOC 2103Z 265DEG 14KT 4157 8494 

TORNADO...RADAR INDICATED
HAIL...<.75IN

$$

MARSILI
688 
WWUS53 KIWX 072114
SVSIWX

Severe Weather Statement
National Weather Service Northern Indiana
514 PM EDT TUE AUG 7 2018

INC151-072130-
/O.CON.KIWX.TO.W.0006.000000T0000Z-180807T2130Z/
Steuben IN-
514 PM EDT TUE AUG 7 2018

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 530 PM EDT FOR
SOUTHEASTERN STEUBEN COUNTY...
    
At 513 PM EDT, a severe thunderstorm capable of producing a tornado
was located near Hamilton, or 8 miles southeast of Angola, moving
east at 15 mph.

HAZARD...Tornado.

SOURCE...Radar indicated rotation.

IMPACT...Flying debris will be dangerous to those caught without 
         shelter. Mobile homes will be damaged or destroyed. Damage 
         to roofs, windows, and vehicles will occur.  Tree damage is 
         likely.

This tornadic thunderstorm will remain over mainly rural areas of
southeastern Steuben County, including the following locations...
Alvarado.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW! Move to a basement or an interior room on the lowest
floor of a sturdy building. Avoid windows. If you are outdoors, in a
mobile home, or in a vehicle, move to the closest substantial shelter
and protect yourself from flying debris.

&&

LAT...LON 4158 8480 4154 8481 4154 8491 4161 8490
      4162 8481
TIME...MOT...LOC 2113Z 263DEG 14KT 4158 8486 

TORNADO...RADAR INDICATED
HAIL...<.75IN

$$

MARSILI
350 
WWUS53 KIWX 072125
SVSIWX

Severe Weather Statement
National Weather Service Northern Indiana
525 PM EDT TUE AUG 7 2018

INC151-072134-
/O.EXP.KIWX.TO.W.0006.000000T0000Z-180807T2130Z/
Steuben IN-
525 PM EDT TUE AUG 7 2018

...THE TORNADO WARNING FOR SOUTHEASTERN STEUBEN COUNTY WILL EXPIRE AT
530 PM EDT...
                
The storm which prompted the warning has weakened below severe
limits, and no longer appears capable of producing a tornado.
Therefore, the warning will be allowed to expire.  However gusty 
winds are still possible with this thunderstorm across far eastern 
Steuben county through 545 PM EDT.

LAT...LON 4158 8480 4154 8481 4154 8491 4161 8490
      4162 8481
TIME...MOT...LOC 2124Z 265DEG 13KT 4158 8481 

$$

MARSILI

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 6, 8:06 PM EDTSpecial Weather StatementIWXCass, White39 min
Aug 6, 8:13 PM EDTAreal Flood AdvisoryIWXElkhart, Saint Joseph3 hr
Aug 6, 8:52 PM EDTSpecial Weather StatementIWXSteuben38 min
Aug 6, 8:57 PM EDTSpecial Weather StatementIWXWhitley33 min
Aug 6, 9:05 PM EDTSevere Thunderstorm WarningIWXAllen, DeKalb, Noble, Whitley40 min
Aug 6, 9:40 PM EDTAreal Flood AdvisoryIWXSteuben3 hr
Aug 6, 9:53 PM EDTFlash Flood WarningIWXWhite2 hr
Aug 6, 11:47 PM EDTSpecial Weather StatementIWXJay43 min
Aug 7, 3:54 PM EDTAreal Flood AdvisoryIWXLaPorte, Saint Joseph3 hr
Aug 7, 4:39 PM EDTSpecial Weather StatementIWXElkhart36 min
Aug 7, 4:50 PM EDTSpecial Weather StatementIWXSteuben40 min

Nearby

Tornado Warnings in Indiana, 2018Every tornado warning in 2018Tornadoes 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.