Alert archive / Indiana / Special Weather Statements in 2017

Special Weather Statement, NWS Indianapolis, IN

March 1, 2017Montgomery County, Indiana

NWS Indianapolis, IN issued this special weather statement at Mar 1, 2017, 2:14 AM EST for Montgomery County, Indiana. It was in force for 31 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: Mar 1, 2017, 2:14 AM EST (07:14 UTC)
Expired: Mar 1, 2017, 2:45 AM EST
In force: 31 min
Issued by: NWS Indianapolis, IN

County Montgomery County, IN

The radar

The Indianapolis radar (KIND), 71 km from the middle of the area, began a volume at 07:15 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 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 Mar 1, 12:26 AM EST, 1 hour 48 minutes earlier.

Area forecast discussion, Mar 1, 12:26 AM EST, 1 hour 48 minutes before

Area Forecast Discussion
National Weather Service Indianapolis IN
1226 AM EST Wed Mar 01 2017

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

&&

.SYNOPSIS...
Issued at 330 PM EST Tue Feb 28 2017

Severe storms expected to develop and move through central
Indiana later tonight and during the overnight, with potential for
tornadoes, large hail and damaging winds. The threat will continue
into Wednesday morning until a cold front moves through to bring
it to an end. Small chances for rain or snow will be off and on
Wednesday night through Friday night for parts of the area, but a
warmup will come for the weekend. More rain chances arrive to end
the weekend and start the work week.

&&

.NEAR TERM /Overnight/...
Issued at 1145 PM EST Tue Feb 28 2017

Updated to include Tornado Watch number 49 for the northern central
Indiana counties through 7 am. Current thinking is there will be a
lull for the next couple of hours, but then any pre-squall
supercells and the squall line itself will be the main concerns with
all severe weather types possible.

Previous discussion follows...
Issued at 1007 PM EST Tue Feb 28 2017

Convection spreading over southwest sections of the forecast area
ahead of an upper wave over southern Illinois. This wave should pass
off to the east around 010700Z, but short term model guidance
suggests a squall line type feature associated with a cold front may
begin moving into the northwestern zones after 010600Z. This
evening's upper air indicates deep shear more than adequate for
severe convection, although the better axis of lapse rates is over
the southern parts of the state and farther south. Tornadic
potential exists with discrete cells tonight, as well as embedded
circulations within lines.

Previous discussion follows.

Forecast focus is on severe weather expected tonight-both the
threats and the timing. Incredible dynamics are coming into place
over the area with a strong upper jet and low level jet forecast to
come into phase tonight over the Ohio Valley. While instability
could be a somewhat limiting factor given the timing during the
night and no sunshine today, moisture return has been ample on
southerly flow and dewpoints in the 60s are already making their way
into central Indiana. The vertical shear profiles are extremely
favorable for rotating storms, and LCLs and LFCs are sufficiently
low to not impede tornado development.

Best estimate on timing of severe potential for the area at this
point is starting around 9pm in the western counties, 10-11
central and midnight or so east. Initially more discrete cells
are anticipated that could possibly morph into a line as they
move across the area, but some models are also indicating they may
keep their more discrete nature. There is also potential after
this first batch of storms that another may come behind them in
the form of a squall line ahead of the cold front.

Given the shear profiles, the tornado threat will continue through
the overnight hours, along with potential for very large hail and
damaging winds.

Also of note...southern counties received a couple of rounds of
showers and thunderstorms already today, with around an inch of
rain or more in some locations. With another couple of rounds
moving through tonight and ample moisture, see potential for
flash flooding and have issued a flash flood watch for that area.

&&

.SHORT TERM /Wednesday through Wednesday night/...

Issued at 330 PM EST Tue Feb 28 2017

Thunderstorms should be ongoing across the area to start the day
on Wednesday. A threat for severe storms will continue ahead of
the cold front which should somewhere in the forecast area at 12z
Wednesday morning. The threat should quickly come to an end by
around 15z or so as model consensus has the front east of the area
12-18z, depending on your model of choice, with the GFS faster and
the NAM slower. Given the time of day and waning instability
threat should be for damaging winds mainly as the aforementioned
ongoing storms start to fade in intensity.

Storm chances move out by Wednesday afternoon, and rain showers
should be exiting as well. An upper wave moving in from the north
will bring some rain chances transitioning to rain/snow mix over
to snow in the north and central parts of the forecast area early
evening into Wednesday night. No accumulation expected.

&&

.LONG TERM /Thursday through Tuesday/...

Issued at 145 PM EST Tue Feb 28 2017

A clipper type system could move through the Great Lakes Thursday
afternoon and night bringing chances for precip to much of the
area. Temperatures look warm enough Thursday afternoon for rain,
but a mix with snow could occur Thursday evening before
transitioning to all snow from north to south during the night.
Little to no accumulation expected.

Another clipper system will move through Friday night and could
bring chances for snow showers to the northern counties. Again
little to no accumulation expected.

Warmer air arrives Saturday and temperatures well above normal
then expected through Tuesday. Sunday night a front system will
approach and keep rain chances in the forecast through Monday
night.

&&

.AVIATION /Discussion for the 010600Z TAF Issuance/...
Issued at 1226 AM EST Wed Mar 01 2017

Potential for severe weather continues overnight. One and possibly
two squall lines, will move over the terminals overnight per radar
trends and the HRRR reflectivity progs. So have tempo IFR conditions
in thunderstorms with hail and gusts to near 50 knots through 12z.
Then, cold front should move through 12z-14z. After that, kept VCSH
in for a several hours with the trailing upper trough still to the
west. Ceilings should be borderline MVFR and VFR through the
remainder of the TAF period. Confidence in exact timing related to
thunderstorms is low but in trends is moderate or better.

Winds will shift from southwest to west behind lines and the cold
front and gust to 30 knots at times.

&&

.IND WATCHES/WARNINGS/ADVISORIES...
Flash Flood Watch through Wednesday afternoon for INZ067>072.

&&

SYNOPSIS...CP
NEAR TERM...CP/JAS/MK
SHORT TERM...CP
LONG TERM....CP
AVIATION...MK

Hazardous weather outlook, Feb 28, 4:53 PM EST, 9 hours 21 minutes before

Hazardous Weather Outlook
National Weather Service Indianapolis IN
453 PM EST Tue Feb 28 2017

INZ028>030-035>039-043>048-051>057-060>065-067>072-012200-
Warren-Tippecanoe-Clinton-Fountain-Montgomery-Boone-Tipton-Hamilton-
Vermillion-Parke-Putnam-Hendricks-Marion-Hancock-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, Crawfordsville,
Indianapolis, Terre Haute, Shelbyville, Bloomington, Columbus,
Vincennes, Bedford, and Seymour
453 PM EST Tue Feb 28 2017

This hazardous weather outlook is for central Indiana.

.DAY ONE...Tonight.

Outlook: Moderate risk for severe weather.

Hazards: Tornadoes...Large Hail...Damaging winds...and heavy rain
causing flooding.

Timing: Severe storms are possible any time tonight, but the highest
threat will be from 10 PM through the nighttime hours.

Discussion: A frontal system will bring showers and thunderstorms to
central Indiana tonight. Some of the storms will be severe, with all
types of severe weather possible. The potential exists for multiple
waves of severe weather.

.DAYS TWO THROUGH SEVEN...Wednesday through Monday.

Outlook: There is a Slight Risk of severe weather for the southeast
half of central Indiana on Wednesday morning. Damaging winds, large
hail, and isolated tornadoes are possible along with cloud to ground
lightning and brief heavy rain.

Discussion: Severe weather will likely be ongoing at daybreak
Wednesday as a cold front move east across the area. The severe
threat will diminish across central Indiana by late morning. A
clipper system will move through Thursday night bringing rain and
snow showers to the area.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is likely this evening through Wednesday morning.

&&

More information, along with other weather, hydrological and climate
information can be found at http://weather.gov/ind

INZ021-031-040>042-049-012200-
Carroll-Howard-Madison-Delaware-Randolph-Henry-
Including the cities of Kokomo, Anderson, and Muncie
453 PM EST Tue Feb 28 2017

This hazardous weather outlook is for central Indiana.

.DAY ONE...Tonight.

Outlook: Enhanced Risk for severe weather.

Hazards: Damaging winds...tornadoes...large hail...and heavy rain.

Timing: Severe storms are possible mainly after 10 PM and then
through the night.

Discussion: A frontal system will bring showers and thunderstorms to
central Indiana tonight. Some of the storms will be severe, with all
types of severe weather possible. The potential exists for multiple
waves of severe weather.

.DAYS TWO THROUGH SEVEN...Wednesday through Monday.

Outlook: There is a Slight Risk of severe weather for the southeast
half of central Indiana on Wednesday morning. Damaging winds, large
hail, and isolated tornadoes are possible along with cloud to ground
lightning and brief heavy rain.

Discussion: Severe weather will likely be ongoing at daybreak
Wednesday as a cold front move east across the area. The severe
threat will diminish across central Indiana by late morning. A
clipper system will move through Thursday night bringing rain and
snow showers to the area.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is likely late this evening through Wednesday
morning..

&&

More information, along with other weather, hydrological and climate
information can be found at http://weather.gov/ind

In the hours before

Local storm report, Feb 28, 10:56 PM EST, 3 hours 18 minutes before

PRELIMINARY LOCAL STORM REPORT...CORRECTED
NATIONAL WEATHER SERVICE INDIANAPOLIS IN
1056 PM EST TUE FEB 28 2017

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

1033 PM     TSTM WND GST     7 SW INDIANAPOLIS       39.72N  86.29W
02/28/2017  M46 MPH          MARION             IN   ASOS

&&

CORRECTED EVENT

BHH

Local storm report, Feb 28, 11:01 PM EST, 3 hours 13 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE INDIANAPOLIS IN
1101 PM EST TUE FEB 28 2017

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

1035 PM     TSTM WND GST     ZIONSVILLE              39.95N  86.27W
02/28/2017  M64 MPH          BOONE              IN   AWOS

&&

BHH

Local storm report, Feb 28, 11:02 PM EST, 3 hours 12 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE INDIANAPOLIS IN
1102 PM EST TUE FEB 28 2017

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

1053 PM     TSTM WND GST     3 NW MUNCIE             40.24N  85.40W
02/28/2017  M52 MPH          DELAWARE           IN   ASOS

&&

BHH

Local storm report, Feb 28, 11:08 PM EST, 3 hours 6 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE INDIANAPOLIS IN
1108 PM EST TUE FEB 28 2017

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

1105 PM     TSTM WND GST     FISHERS                 39.95N  86.02W
02/28/2017  M65 MPH          HAMILTON           IN   BROADCAST MEDIA

&&

DRT

Local storm report, Mar 1, 12:37 AM EST, 1 hour 37 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE INDIANAPOLIS IN
1237 AM EST WED MAR 01 2017

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

1224 AM     HAIL             FRANKLIN                39.49N  86.06W
03/01/2017  E1.00 INCH       JOHNSON            IN   TRAINED SPOTTER

&&

DRT

Special weather statement, Mar 1, 2:14 AM EST, 0 minutes before

Special Weather Statement
National Weather Service Indianapolis IN
214 AM EST WED MAR 1 2017

INZ029-030-036-010745-
Montgomery-Clinton-Tippecanoe-
214 AM EST WED MAR 1 2017

...A STRONG THUNDERSTORM WILL AFFECT SOUTHERN TIPPECANOE...
SOUTHWESTERN CLINTON AND NORTHERN MONTGOMERY COUNTIES...

At 213 AM EST, a strong thunderstorm was located 13 miles northwest
of Crawfordsville, moving east at 60 mph.

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

Locations impacted include...
Lafayette, Crawfordsville, Shadeland, Mulberry, Darlington, Linden,
Colfax, Clarks Hill, New Richmond and Wingate.

This includes the following highways...
 Interstate 65 between mile markers 155 and 167.
 Interstate 74 between mile markers 30 and 39.

This storm may intensify, so be certain to monitor local radio
stations and available television stations for additional information
and possible warnings from the National Weather Service.

LAT...LON 4036 8655 4018 8663 4018 8670 4004 8669
      4001 8671 4013 8709 4026 8709 4037 8707
TIME...MOT...LOC 0713Z 278DEG 51KT 4022 8700

TDUD

The office that day

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

Issued	Product	Office	Counties	Lasted
Feb 28, 9:23 PM EST	Severe Thunderstorm Warning	IND	Clay, Sullivan, Vigo	37 min
Feb 28, 10:35 PM EST	Tornado Warning	IND	Knox, Sullivan	25 min
Mar 1, 12:33 AM EST	Severe Thunderstorm Warning	IND	Rush, Shelby	28 min
Mar 1, 1:07 AM EST	Severe Thunderstorm Warning	IND	Jackson, Jennings	38 min
Mar 1, 1:20 AM EST	Areal Flood Warning	IND	Jackson, Jennings	6 hr
Mar 1, 2:46 AM EST	Special Weather Statement	IND	Boone, Clinton, Hamilton, Tipton	29 min
Mar 1, 2:53 AM EST	Special Weather Statement	IND	Clay, Hendricks, Morgan, Putnam	37 min
Mar 1, 4:50 AM EST	Severe Thunderstorm Warning	IND	Clay, Morgan, Owen, Putnam	20 min
Mar 1, 5:36 AM EST	Severe Thunderstorm Warning	IND	Bartholomew, Brown, Decatur, Jennings, Johnson, Rush and 1 more	39 min
Mar 1, 6:02 AM EST	Severe Thunderstorm Warning	IND	Jennings	22 min
Mar 1, 7:09 AM EST	Areal Flood Warning	IND	Jackson, Jennings	3 hr
Mar 1, 11:23 AM EST	River Flood Warning	IND	Jackson, Jennings, Washington	13 hr
Mar 1, 11:23 AM EST	River Flood Warning	IND	Jackson, Lawrence, Washington	7 days
Mar 1, 11:23 AM EST	River Flood Warning	IND	Lawrence, Martin	7 days
Mar 1, 11:23 AM EST	River Flood Warning	IND	Lawrence, Martin	7 days
Mar 1, 11:23 AM EST	River Flood Warning	IND	Lawrence, Martin	7 days
Mar 1, 11:23 AM EST	River Flood Warning	IND	Greene, Monroe, Owen	3 days
Mar 1, 11:23 AM EST	River Flood Warning	IND	Daviess, Greene, Knox	4 days

Nearby

Special Weather Statements in Indiana, 2017 Every special weather statement in 2017

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; radar from the NEXRAD Level II archive.