Alert archive / Indiana / Mesoscale Discussions in 2016

Mesoscale Discussion 1024

June 22, 201627 counties in Illinois; 37 counties in Indiana; 15 counties in Ohio

The Storm Prediction Center issued this mesoscale discussion at Jun 22, 2016, 8:53 PM CDT for 27 counties in Illinois; 37 counties in Indiana; 15 counties in Ohio. It was in force for 97 min.

The area

The outline as issued.

The facts

Issued
Jun 22, 2016, 8:53 PM CDT (01:53 UTC)
Expired
Jun 22, 2016, 10:30 PM CDT
In force
97 min
Issued by
the Storm Prediction Center
All 79 counties

Bureau County, IL, Champaign County, IL, Cook County, IL, DeKalb County, IL, DuPage County, IL, Ford County, IL, Grundy County, IL, Henry County, IL, Iroquois County, IL, Kane County, IL, Kankakee County, IL, Kendall County, IL, Knox County, IL, LaSalle County, IL, Lee County, IL, Livingston County, IL, Marshall County, IL, McLean County, IL, Ogle County, IL, Peoria County, IL, Putnam County, IL, Stark County, IL, Tazewell County, IL, Vermilion County, IL, Whiteside County, IL, Will County, IL, Woodford County, IL, Adams County, IN, Allen County, IN, Benton County, IN, Blackford County, IN, Boone County, IN, Carroll County, IN, Cass County, IN, Clinton County, IN, Delaware County, IN, Fountain County, IN, Fulton County, IN, Grant County, IN, Hamilton County, IN, Henry County, IN, Howard County, IN, Huntington County, IN, Jasper County, IN, Jay County, IN, Kosciusko County, IN, Lake County, IN, LaPorte County, IN, Madison County, IN, Marshall County, IN, Miami County, IN, Newton County, IN, Porter County, IN, Pulaski County, IN, Randolph County, IN, Starke County, IN, Tippecanoe County, IN, Tipton County, IN, Wabash County, IN, Warren County, IN, Wayne County, IN, Wells County, IN, White County, IN, Whitley County, IN, Allen County, OH, Auglaize County, OH, Champaign County, OH, Clark County, OH, Darke County, OH, Greene County, OH, Logan County, OH, Mercer County, OH, Miami County, OH, Montgomery County, OH, Paulding County, OH, Preble County, OH, Putnam County, OH, Shelby County, OH, Van Wert County, OH

The radar

The Chicago radar (KLOT), 104 km from the middle of the area, began a volume at 01:54 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 watches that followed

Watches SPC issued over any of the same counties within four hours of this discussion.

The nearest sounding before it

Lincoln, IL (KILX), launched 00:00Z, 1.9 hours before the alert went out and 126 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, Lincoln, IL at 00:00Z on 2016-06-23Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2491 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, Lincoln, IL at 00:00Z on 2016-06-23The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 170 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
2491 J/kg
Mixed-layer CIN
-11 J/kg
Mixed-layer LCL
1597 m above ground
0-6 km bulk shear
46 kt
0-1 km storm-relative helicity
170 m²/s²
0-3 km storm-relative helicity
406 m²/s²
Significant tornado parameter
2.1
Supercell composite
41.8

Open this sounding in Storm Lab

The text

As transmitted.

133 
ACUS11 KWNS 230154
SWOMCD
SPC MCD 230153 
OHZ000-INZ000-ILZ000-230330-

MESOSCALE DISCUSSION 1024
NWS STORM PREDICTION CENTER NORMAN OK
0853 PM CDT WED JUN 22 2016

AREAS AFFECTED...NORTHERN ILLINOIS/NORTHERN AND CENTRAL
INDIANA...AND WESTERN OHIO

CONCERNING...TORNADO WATCH 286...

VALID 230153Z - 230330Z

THE SEVERE WEATHER THREAT FOR TORNADO WATCH 286 CONTINUES.

SUMMARY...A TORNADO THREAT AND POTENTIAL FOR LARGE HAIL AND DAMAGING
WINDS CONTINUE ACROSS THE VALID PORTION OF WW 286 IN MUCH OF
NORTHERN ILLINOIS AND NORTHWEST INDIANA.  THROUGH 03Z...THE GREATEST
THREAT FOR STRONG TORNADOES SHOULD PERSIST ACROSS NORTH-CENTRAL IL
WITH THE ONGOING CLUSTER OF STORMS AS THEY TRACK TO THE
EAST-SOUTHEAST NEAR THE WARM FRONT.

A NEW TORNADO WATCH WILL BE COORDINATED THIS EVENING FOR A TORNADO
THREAT AND AN INCREASING SEVERE/DAMAGING WIND THREAT DOWNSTREAM OF
WW 286.

DISCUSSION...TRENDS IN EARLY EVENING MOSAIC RADAR IMAGERY SHOWED A
CLUSTER OF SUPERCELLS...SOME TORNADIC...TRACKING TO THE
EAST-SOUTHEAST AT 25-30 KT...WITH THE GREATEST TORNADO THREAT
EXPECTED TO REMAIN 20-25 MILES EITHER SIDE OF THE WARM FRONT.  AT
00-01Z...THIS FRONT EXTENDED FROM A SURFACE LOW IN SOUTHEAST IA
THROUGH THE COMPLEX OF SUPERCELLS IN NORTHERN IL TO CENTRAL INDIANA
AND THEN TENDS TO BECOME MORE DIFFUSE ACROSS CENTRAL OH.  LOW-LEVEL
WINDS ACROSS IL/INDIANA HAVE STRENGTHENED FROM THE SOUTHWEST AT
30-40 KT WITH 0-KM SRH INCREASING /ILX WSR-88D VWP 0-1 KM SRH 300+
M2/S2 AT 0124Z/.  THIS LLJ IS ALSO PROVIDING A FEED OF VERY STRONG
INSTABILITY /MLCAPE 2500-4000 J PER KG/...WHILE THE INSTABILITY
GRADIENT EXTENDED SOUTHEAST INTO CENTRAL INDIANA AND SOUTHWEST OHIO.

AND...THE STRENGTHENING SWLY LOW-LEVEL WINDS ARE AIDING IN THE
RETURN OF HIGHER SURFACE DEW POINTS ACROSS THE WARM SECTOR /INTO
CENTRAL INDIANA AND SOUTHWEST TO CENTRAL OHIO/.  THIS
DESTABILIZATION SUGGESTS THE TRACK OF AN EVENTUAL
FORWARD-PROPAGATING MCS/BOW WILL MOVE THROUGH CENTRAL INDIANA LATER
THIS EVENING AND INTO WESTERN/CENTRAL OHIO OVERNIGHT.  A VEERING AND
FURTHER STRENGTHENING LOW-LEVEL JET TO 50-55 KT COMBINED WITH THE
INFLUX OF VERY STRONG INSTABILITY TO THE UPSCALE GROWING MCS WILL
RESULT IN AN INCREASE IN THE FORWARD SPEED...GREATLY ENHANCING THE
THREAT FOR DAMAGING WINDS.

..PETERS/EDWARDS.. 06/23/2016

...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT...

ATTN...WFO...CLE...ILN...IWX...IND...LOT...ILX...DVN...

LAT...LON   40528981 41099067 41769000 42168929 42188781 41828744
            41718691 41568618 41268499 40958381 40058357 39598389
            39838519 40118722 39958750 39928818 40188855 40488967
            40528981

SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jun 22, 11:51 PM CDTMesoscale DiscussionSPCChampaign, Ford, Iroquois, Livingston, Vermilion84 min
Jun 22, 7:07 PM CDTMesoscale DiscussionSPCLaGrange, Steuben113 min
Jun 22, 9:33 PM CDTTornado WatchSPCAdams, Allen, Bartholomew, Blackford, Boone, Carroll and 51 more8 hr
Jun 23, 3:36 AM CDTMesoscale DiscussionSPCDearborn, Decatur, Franklin, Johnson, Ohio, Ripley and 2 more24 min
Jun 23, 1:26 PM CDTMesoscale DiscussionSPCScott, Switzerland64 min
Jun 23, 2:01 PM CDTTornado WatchSPCDearborn, Franklin, Ohio, Ripley, Switzerland7 hr
Jun 23, 2:24 PM CDTSevere Thunderstorm WatchSPCClark, Crawford, Dubois, Floyd, Gibson, Harrison and 10 more10 hr
Jun 23, 5:57 PM CDTMesoscale DiscussionSPCOhio93 min
Jun 23, 6:58 PM CDTMesoscale DiscussionSPCClark, Crawford, Dubois, Floyd, Gibson, Harrison and 10 more2 hr
Jun 23, 1:51 AM CDTMesoscale DiscussionSPCAthens, Gallia, Jackson, Lawrence, Meigs, Morgan and 1 more54 min
Jun 23, 2:42 AM CDTSevere Thunderstorm WatchSPCAthens, Gallia, Jackson, Lawrence, Meigs, Vinton and 1 more4 hr

Nearby

Mesoscale Discussions in Indiana, 2016Mesoscale Discussions in Illinois, 2016Mesoscale Discussions in Ohio, 2016Every mesoscale discussion in 2016

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.