Alert archive / Ohio / Mesoscale Discussions in 2011

Mesoscale Discussion 57

January 31, 201138 counties in Indiana; 43 counties in Ohio

The Storm Prediction Center issued this mesoscale discussion at Jan 31, 2011, 7:56 PM EST for 38 counties in Indiana; 43 counties in Ohio. It was in force for 5 hr.

The area

The outline as issued.

The facts

Issued
Jan 31, 2011, 7:56 PM EST (00:56 UTC)
Expired
Feb 1, 2011, 1:00 AM EST
In force
5 hr
Issued by
the Storm Prediction Center
All 81 counties

Adams County, IN, Allen County, IN, Bartholomew County, IN, Blackford County, IN, Boone County, IN, Brown County, IN, Cass County, IN, Clinton County, IN, Decatur County, IN, DeKalb County, IN, Delaware County, IN, Fayette County, IN, Franklin County, IN, Grant County, IN, Hamilton County, IN, Hancock County, IN, Hendricks County, IN, Henry County, IN, Howard County, IN, Huntington County, IN, Jay County, IN, Johnson County, IN, Kosciusko County, IN, Madison County, IN, Marion County, IN, Miami County, IN, Morgan County, IN, Noble County, IN, Putnam County, IN, Randolph County, IN, Rush County, IN, Shelby County, IN, Tipton County, IN, Union County, IN, Wabash County, IN, Wayne County, IN, Wells County, IN, Whitley County, IN, Allen County, OH, Ashland County, OH, Auglaize County, OH, Butler County, OH, Champaign County, OH, Clark County, OH, Crawford County, OH, Darke County, OH, Defiance County, OH, Delaware County, OH, Erie County, OH, Franklin County, OH, Fulton County, OH, Greene County, OH, Hancock County, OH, Hardin County, OH, Henry County, OH, Holmes County, OH, Huron County, OH, Knox County, OH, Licking County, OH, Logan County, OH, Lucas County, OH, Madison County, OH, Marion County, OH, Mercer County, OH, Miami County, OH, Montgomery County, OH, Morrow County, OH, Ottawa County, OH, Paulding County, OH, Preble County, OH, Putnam County, OH, Richland County, OH, Sandusky County, OH, Seneca County, OH, Shelby County, OH, Union County, OH, Van Wert County, OH, Wayne County, OH, Williams County, OH, Wood County, OH, Wyandot County, OH

The radar

The Cincinnati radar (KILN), 136 km from the middle of the area, began a volume at 00:56 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.

The nearest sounding before it

Cncnati-Daytn, OH (KILN), launched 00:00Z, 0.9 hours before the alert went out and 135 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 00:00Z on 2011-02-01Temperature 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, Cncnati-Daytn, OH at 00:00Z on 2011-02-01The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 228 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
615 m above ground
0-6 km bulk shear
65 kt
0-1 km storm-relative helicity
228 m²/s²
0-3 km storm-relative helicity
264 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

615 
ACUS11 KWNS 010056
SWOMCD
SPC MCD 010056 
OHZ000-INZ000-010600-

MESOSCALE DISCUSSION 0057
NWS STORM PREDICTION CENTER NORMAN OK
0656 PM CST MON JAN 31 2011

AREAS AFFECTED...ERN INDIANA...NERN AND CNTRL OHIO

CONCERNING...WINTER MIXED PRECIPITATION 

VALID 010056Z - 010600Z

MIXED WINTER PRECIPITATION CURRENTLY FALLING OVER MUCH OF CNTRL AND
NRN INDIANA WILL CONTINUE TO TRACK E/NE INTO OHIO THIS EVENING.
FREEZING RAIN WITH SLEET AT TIMES IS EXPECTED ALONG THE I-70
CORRIDOR FROM INDIANAPOLIS TO COLUMBUS THEN NEWD TOWARD MANSFIELD
AND CANTON BY 03Z-06Z. FURTHER SOUTH OF I-70 AND TOWARD THE OHIO
RIVER...PRECIPITATION WILL BE MUCH LIGHTER.  ACROSS THE NORTHERN
PORTIONS OF THE MCD AREA FROM NEAR FORT WAYNE TO FINDLAY AND
TOLEDO...MODERATE TO HEAVY SNOWFALL IS EXPECTED WITH RATES
APPROACHING ONE INCH PER HOUR THROUGH AT LEAST 06Z.

ALL OF THIS IS RELATED TO REGION OF WAA/ISENTROPIC UPGLIDE IN
VICINITY OF 292K-295K LAYER AND 850 MB FRONTOGENETIC BAND NOW
LOCATED ACROSS CNTRL INDIANA. PRECIPITATION IS EXPECTED TO CONTINUE
THROUGH MUCH OF THE EVENING AND INTO THE OVERNIGHT HOURS AS MID
LEVEL JET AROUND 40 KT AND VORTICITY MAX ALIGN TO ENHANCE DEEP LAYER
LIFT AND MAINTAIN/STRENGTHEN 850-700 MB FRONTOGENETIC BAND. IT
SHOULD ALSO BE NOTED THAT STEEP LAPSE RATES AND SOME MODEST
INSTABILITY NOTED ON FORECAST SOUNDINGS COULD LEAD TO SOME BRIEF
PERIODS OF CONVECTIVE BANDS WHERE RATES WOULD EXCEED THOSE MENTIONED
ABOVE.

FORECAST SOUNDINGS INDICATE WARM NOSE OF 3-6 C ACROSS MUCH OF
W-CNTRL AND CNTRL OHIO TONIGHT...ALLOWING PRECIPITATION TO FULLY
MELT BEFORE REACHING THE NEAR SFC FREEZING LAYER. FURTHER N...THERE
MAY BE A TRANSITION ZONE WHERE SLEET MIXES WITH FREEZING RAIN AND/OR
SNOW BEFORE PROFILES BECOME FAVORABLE FOR DENDRITES TO REMAIN FROZEN
AND FALL AS SNOW ACROSS NERN INDIANA AND NWRN OHIO.

..STOPPKOTTE.. 02/01/2011

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

ATTN...WFO...PBZ...CLE...ILN...IWX...IND...

LAT...LON   41408238 41288213 41118197 40788186 40568188 40318207
            40058255 39488405 39168517 39158624 39268667 39388685
            39668689 40108666 40888632 41198609 41458553 41568481
            41658444 41698355 41658287 41408238

SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Feb 1, 12:42 PM ESTMesoscale DiscussionSPCBartholomew, Blackford, Boone, Brown, Clay, Clinton and 37 more5 hr
Feb 1, 4:36 PM ESTMesoscale DiscussionSPCJasper, Lake, LaPorte, Newton, Porter, Saint Joseph and 1 more6 hr
Feb 1, 4:54 PM ESTMesoscale DiscussionSPCAdams, Allen, Bartholomew, Blackford, Boone, Brown and 42 more5 hr
Feb 1, 12:12 AM ESTMesoscale DiscussionSPCAshtabula, Carroll, Columbiana, Cuyahoga, Geauga, Harrison and 8 more5 hr

Nearby

Mesoscale Discussions in Ohio, 2011Mesoscale Discussions in Indiana, 2011Every mesoscale discussion in 2011

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.