Alert archive / Indiana / Special Weather Statements in 2016

Special Weather Statement, NWS Indianapolis, IN

August 26, 2016Boone County, Hamilton County, Indiana

NWS Indianapolis, IN issued this special weather statement at Aug 26, 2016, 8:00 AM EDT for Boone County, Hamilton County, Indiana. It was in force for 30 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 26, 2016, 8:00 AM EDT (12:00 UTC)
Expired: Aug 26, 2016, 8:30 AM EDT
In force: 30 min
Issued by: NWS Indianapolis, IN

Counties Boone County, IN, Hamilton County, IN

The radar

The Indianapolis radar (KIND), 27 km from the middle of the area, began a volume at 12:01 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 12:00Z, 0.0 hours before the alert went out and 205 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 742 J/kg
Mixed-layer CIN: -38 J/kg
Mixed-layer LCL: 852 m above ground
0-6 km bulk shear: 26 kt
0-1 km storm-relative helicity: -29 m²/s²
0-3 km storm-relative helicity: 41 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.4

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 Indianapolis, IN wrote its last area forecast discussion before this special weather statement went out at Aug 26, 6:28 AM EDT, 1 hour 32 minutes earlier.

Area forecast discussion, Aug 26, 6:28 AM EDT, 1 hour 32 minutes before

Area Forecast Discussion
National Weather Service Indianapolis IN
628 AM EDT FRI AUG 26 2016

.UPDATE...
The AVIATION Section has been updated below.

&&

.SYNOPSIS...
Issued at 332 AM EDT Fri Aug 26 2016

Active weather pattern continues with chances for thunderstorms
most days through the period. Temperatures will run above normal
through the period as well with highs in the mid 80s to around 90
and lows in the mid 60s to lower 70s.

&&

.NEAR TERM /Today/...

Issued at 530 AM EDT Fri Aug 26 2016

Quick update to increase pops and change wording to scattered
thunderstorms across the northwestern counties for the next couple
of hours. Previous discussion follows...

Radar mosaic shows scattered showers and thunderstorms from
central Ohio through central Indiana and central Illinois
generally along a weak stalled-out warm frontal boundary. Rapid
update models show these dissipating over the next hour or so but
think this may be too quick as they haven't been handling this
convection well. Thus kept scattered and isolated storms going in
that area for a few hours before dropping pops to a slight chance
and going dry in the west. During the morning looks like there
could be a few showers and storms across the northern half or so
of the area before high pressure builds in from the north and
ushers in dry air. Across the south could see a few showers and
storms in the afternoon with the front settling near there as the
high builds from the north. For highs used a consensus in the mid
80s north to upper 80s south.

&&

.SHORT TERM /Tonight through Sunday night/...

Issued at 332 AM EDT Fri Aug 26 2016

Focus for the short term is on thunderstorm chances...but with
model variability and weak waves moving through the edges of an
upper ridge generally lower than average confidence forecast.
There potential for a wave to move in tonight, but it doesn't look
very strong and there is big model disagreement on precip so
brought in low to mid chance pops in the west on the outskirts of
the ridge. Saturday better model agreement on a shortwave bringing
thunderstorm chances but no agreement on timing so tried to
compromise among solutions. Again the best chances will be in the
northwest closest to the upper forcing and furthest from the
subsidence of the ridge. Chances continue through Sunday with the
lowest chance on Sunday night with less forcing. High temperatures
will generally run in the mid 80s to around 90, but could wind up
a little lower if precip is more widespread or long lived than
currently thinking.

&&

.LONG TERM /Monday through Thursday/...

Issued at 237 AM EDT Fri Aug 26 2016

ECMWF suggests High pressure in place much of this period as NW
flow develops aloft ahead of an amplifying upper ridge upstream
over the central plains states. NE surface flow is suggest through
much of the period. Nonetheless...superblend suggests daily low
chc pops as even though there appears to be little forcing.
Superblend suggests the continuation of high dew points throughout
period...in the upper 60s and lower 70s...and this may resulting
the blend putting in daily chances for diurnal convection. Still
dew points in the upper 60s and lower 70s seem high given the
expected northeast surface flow. This being said...confidence is
low. Followed superblend however...best precip chances look to
mainly be afternoon convection.

&&

.AVIATION /Discussion for the 261200/...

Issued at 620 AM EDT Fri Aug 26 2016

Main VFR Conditions expected today...with MVFR/IFR fog possible on
Early Saturday morning.

TSRA will pass over LAF within the first 1-2 hours of the taf
period...associated with an upper wave approaching from the
southwest. The tropical plume in place over the Mississippi Valley
will trend farther north today...keeping best forcing north of the
forecast area. Forecast soundings show convective temps in the
middle 80s...which should be reached. Some sct convection will
also be possible within the warm and humid air amass across the
area...however...confidence on location and time too low for a
mention at this point.

Better confidence in precip and fog chances overnight and
forecast soundings suggest and overruning set beginning to take
shape and yet another wave aloft pushing toward central Indiana.
Given this set up...and the expected NE flow...have trended toward
some MVFR fog overnight and dew point depressions will be 0-1
degrees overnight. Forecast soundings also hint at becoming
saturated as do the time height sections. Thus have included a
vcsh mention also.

&&

.IND Watches/Warnings/Advisories...
NONE.
&&

SYNOPSIS...CP
NEAR TERM...CP
SHORT TERM...CP
LONG TERM....PUMA
AVIATION...JP

Hazardous weather outlook, Aug 26, 4:53 AM EDT, 3 hours 7 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE INDIANAPOLIS IN
453 AM EDT FRI AUG 26 2016

INZ021-028>031-035>049-051>057-060>065-067>072-270900-
CARROLL-WARREN-TIPPECANOE-CLINTON-HOWARD-FOUNTAIN-MONTGOMERY-BOONE-
TIPTON-HAMILTON-MADISON-DELAWARE-RANDOLPH-VERMILLION-PARKE-PUTNAM-
HENDRICKS-MARION-HANCOCK-HENRY-VIGO-CLAY-OWEN-MORGAN-JOHNSON-SHELBY-
RUSH-SULLIVAN-GREENE-MONROE-BROWN-BARTHOLOMEW-DECATUR-KNOX-DAVIESS-
MARTIN-LAWRENCE-JACKSON-JENNINGS-
INCLUDING THE CITIES OF...LAFAYETTE...FRANKFORT...KOKOMO...
CRAWFORDSVILLE...ANDERSON...MUNCIE...INDIANAPOLIS...TERRE HAUTE...
SHELBYVILLE...BLOOMINGTON...COLUMBUS...VINCENNES...BEDFORD...SEYMOUR
453 AM EDT FRI AUG 26 2016

THIS HAZARDOUS WEATHER OUTLOOK IS FOR CENTRAL INDIANA.

.DAY ONE...TODAY AND TONIGHT.

OUTLOOK: PATCHY FOG IS POSSIBLE THIS MORNING. THERE IS A CHANCE
FOR THUNDERSTORMS TODAY AND TONIGHT.

HAZARDS: REDUCED VISIBILITY FROM FOG. HEAVY
DOWNPOURS...LIGHTNING...GUSTY WINDS FROM THUNDERSTORMS.

TIMING: FOG POSSIBLE THROUGH 9 AM. THUNDERSTORMS POSSIBLE
TODAY AND TONIGHT.

DISCUSSION: A STALLED FRONTAL BOUNDARY WILL KEEP SMALL CHANCES FOR
THUNDERSTORMS ACROSS THE AREA TODAY...AND COMBINED WITH NEAR CALM
WINDS WILL ALSO ALLOW FOR PATCHY FOG FORMATION THIS MORNING.

.DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY.

OUTLOOK: THERE ARE CHANCES FOR THUNDERSTORMS SATURDAY THROUGH
THURSDAY. AT THIS TIME WIDESPREAD SEVERE STORMS ARE NOT
EXPECTED...BUT LIGHTNING IS A THREAT FROM ANY THUNDERSTORM.

DISCUSSION: UPPER WAVES MOVING THROUGH ON THE EDGES OF AN UPPER
RIDGE WILL KEEP CHANCES FOR THUNDERSTORMS IN THE FORECAST THROUGH
THE PERIOD.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION IS NOT ANTICIPATED.

&&

MORE INFORMATION...ALONG WITH OTHER WEATHER...HYDROLOGICAL AND
CLIMATE INFORMATION CAN BE FOUND...AT HTTP://WEATHER.GOV/IND (ALL
LOWERCASE)

In the hours before

Special weather statement, Aug 26, 5:54 AM EDT, 2 hours 6 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE INDIANAPOLIS IN
554 AM EDT FRI AUG 26 2016

INZ028-035-043-044-261045-
PARKE IN-FOUNTAIN IN-WARREN IN-VERMILLION IN-
554 AM EDT FRI AUG 26 2016

...SIGNIFICANT WEATHER ADVISORY FOR FOUNTAIN...WARREN...NORTHWESTERN
PARKE AND NORTHERN VERMILLION COUNTIES UNTIL 645 AM EDT...

AT 554 AM EDT...DOPPLER RADAR WAS TRACKING STRONG THUNDERSTORMS ALONG
A LINE EXTENDING FROM 9 MILES SOUTHEAST OF ROSSVILLE TO NEAR RIDGE
FARM. MOVEMENT WAS EAST AT 30 MPH.

WINDS IN EXCESS OF 40 MPH WILL BE POSSIBLE WITH THESE STORMS.

LOCATIONS IMPACTED INCLUDE...
COVINGTON...VEEDERSBURG...WILLIAMSPORT...NEWPORT...ATTICA...CAYUGA...
WEST LEBANON...HILLSBORO...KINGMAN...PERRYSVILLE...NEWTOWN...
PINE VILLAGE...MELLOTT...WALLACE...FOSTER...GESSIE...LODI...
RAINSVILLE...TAB AND PENCE.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TORRENTIAL RAINFALL IS ALSO OCCURRING WITH THESE STORMS...AND MAY
LEAD TO LOCALIZED FLOODING. DO NOT DRIVE YOUR VEHICLE THROUGH
FLOODED ROADWAYS.

FREQUENT CLOUD TO GROUND LIGHTNING IS OCCURRING WITH THESE STORMS.
LIGHTNING CAN STRIKE 10 MILES AWAY FROM A THUNDERSTORM. SEEK A SAFE
SHELTER INSIDE A BUILDING OR VEHICLE.

&&

LAT...LON 4047 8752 4048 8742 4047 8711 3992 8709
      3987 8753
TIME...MOT...LOC 0954Z 255DEG 25KT 4029 8754 3988 8754

PUMA

Special weather statement, Aug 26, 6:48 AM EDT, 1 hour 12 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE INDIANAPOLIS IN
648 AM EDT FRI AUG 26 2016

INZ029-035-036-261130-
FOUNTAIN IN-MONTGOMERY IN-TIPPECANOE IN-
648 AM EDT FRI AUG 26 2016

...SIGNIFICANT WEATHER ADVISORY FOR EASTERN FOUNTAIN...MONTGOMERY AND
TIPPECANOE COUNTIES UNTIL 730 AM EDT...

AT 647 AM EDT...DOPPLER RADAR WAS TRACKING STRONG THUNDERSTORMS ALONG
A LINE EXTENDING FROM NEAR OTTERBEIN TO 11 MILES NORTHEAST OF
ROCKVILLE. MOVEMENT WAS EAST AT 20 MPH.

HALF INCH HAIL AND WINDS IN EXCESS OF 40 MPH WILL BE POSSIBLE WITH
THESE STORMS.

LOCATIONS IMPACTED INCLUDE...
LAFAYETTE...CRAWFORDSVILLE...WEST LAFAYETTE...SHADELAND...DAYTON...
BATTLE GROUND...LADOGA...WAYNETOWN...DARLINGTON...LINDEN...
NEW MARKET...CLARKS HILL...WAVELAND...NEW RICHMOND...WINGATE...
ALAMO...PURDUE UNIVERSITY AND SHADES STATE PARK.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TORRENTIAL RAINFALL IS ALSO OCCURRING WITH THESE STORMS...AND MAY
LEAD TO LOCALIZED FLOODING. DO NOT DRIVE YOUR VEHICLE THROUGH
FLOODED ROADWAYS.

FREQUENT CLOUD TO GROUND LIGHTNING IS OCCURRING WITH THESE STORMS.
LIGHTNING CAN STRIKE 10 MILES AWAY FROM A THUNDERSTORM. SEEK A SAFE
SHELTER INSIDE A BUILDING OR VEHICLE.

&&

LAT...LON 3989 8672 3988 8709 3995 8709 3995 8714
      4034 8713 4037 8709 4049 8709 4054 8671
TIME...MOT...LOC 1047Z 258DEG 19KT 4042 8708 3990 8710

PUMA

Special weather statement, Aug 26, 8:00 AM EDT, 0 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE INDIANAPOLIS IN
800 AM EDT FRI AUG 26 2016

INZ037-039-046-047-261230-
MARION IN-HENDRICKS IN-HAMILTON IN-BOONE IN-
800 AM EDT FRI AUG 26 2016

...SIGNIFICANT WEATHER ADVISORY FOR SOUTHERN HAMILTON...SOUTHEASTERN
BOONE...NORTHEASTERN HENDRICKS AND NORTHERN MARION COUNTIES UNTIL 830
AM EDT...

AT 759 AM EDT...DOPPLER RADAR WAS TRACKING A STRONG THUNDERSTORM
NEAR ZIONSVILLE...OR 18 MILES NORTHWEST OF INDIANAPOLIS...MOVING
EAST AT 35 MPH.

WINDS IN EXCESS OF 40 MPH WILL BE POSSIBLE WITH THIS STORM.

LOCATIONS IMPACTED INCLUDE...
INDIANAPOLIS...CARMEL...FISHERS...NOBLESVILLE...LAWRENCE...
BROWNSBURG...LEBANON...ZIONSVILLE...SPEEDWAY...DANVILLE...
WESTFIELD...AVON...CUMBERLAND...CICERO...PITTSBORO...WHITESTOWN...
MERIDIAN HILLS...WARREN PARK...CLERMONT AND ROCKY RIPPLE.

LAT...LON 3987 8594 3987 8595 3979 8595 3978 8651
      4010 8653 4012 8595
TIME...MOT...LOC 1159Z 266DEG 30KT 3995 8640

50

The office that day

Everything else NWS Indianapolis, IN issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Aug 26, 5:54 AM EDT	Special Weather Statement	IND	Fountain, Warren	51 min
Aug 26, 6:48 AM EDT	Special Weather Statement	IND	Montgomery, Tippecanoe	42 min
Aug 26, 8:28 AM EDT	Special Weather Statement	IND	Hancock, Marion	47 min
Aug 26, 8:40 AM EDT	Severe Thunderstorm Warning	IND	Hamilton, Hancock, Marion	35 min
Aug 26, 8:53 AM EDT	Tornado Warning	IND	Hancock, Marion, Shelby	22 min
Aug 26, 9:05 AM EDT	Severe Thunderstorm Warning	IND	Decatur, Hancock, Henry, Rush, Shelby	40 min
Aug 26, 9:19 AM EDT	Areal Flood Advisory	IND	Hancock, Marion	3 hr
Aug 26, 9:42 AM EDT	Severe Thunderstorm Warning	IND	Rush	33 min
Aug 26, 3:32 PM EDT	Areal Flood Advisory	IND	Clay, Vigo	3 hr
Aug 26, 3:49 PM EDT	Flash Flood Warning	IND	Clay, Vigo	3 hr
Aug 26, 3:56 PM EDT	Areal Flood Advisory	IND	Bartholomew, Johnson	3 hr
Aug 26, 4:01 PM EDT	Severe Thunderstorm Warning	IND	Parke, Vermillion	29 min
Aug 26, 4:24 PM EDT	Severe Thunderstorm Warning	IND	Montgomery, Parke, Putnam	27 min
Aug 26, 4:28 PM EDT	Flash Flood Warning	IND	Parke, Vermillion	3 hr
Aug 26, 5:24 PM EDT	Areal Flood Advisory	IND	Hancock, Marion	3 hr
Aug 26, 6:12 PM EDT	Flash Flood Warning	IND	Hamilton, Hancock, Hendricks, Johnson, Marion, Morgan	3 hr

Nearby

Special Weather Statements in Indiana, 2016 Every special weather statement 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.