Severe Thunderstorm Warning 33, NWS Indianapolis, IN

831 
WWUS53 KIND 152057
SVSIND

Severe Weather Statement
National Weather Service Indianapolis IN
457 PM EDT Sun May 15 2022

INC045-157-171-152115-
/O.CON.KIND.SV.W.0033.000000T0000Z-220515T2115Z/
Fountain IN-Tippecanoe IN-Warren IN-
457 PM EDT Sun May 15 2022

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 515 PM EDT
FOR NORTHEASTERN FOUNTAIN...WESTERN TIPPECANOE AND NORTHEASTERN
WARREN COUNTIES...

At 456 PM EDT, a severe thunderstorm was located near Otterbein,
moving northeast at 25 mph.

HAZARD...Quarter size hail.

SOURCE...Radar indicated.

IMPACT...Damage to vehicles is expected.

Locations impacted include...
Lafayette, West Lafayette, Williamsport, Attica, Shadeland and Purdue
University.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

&&

LAT...LON 4056 8695 4030 8686 4021 8737 4034 8735
      4048 8713 4048 8709 4050 8709 4056 8696
TIME...MOT...LOC 2056Z 246DEG 23KT 4041 8706 

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...<50 MPH

$$

Puma

706 
WWUS53 KIND 152103
SVSIND

Severe Weather Statement
National Weather Service Indianapolis IN
503 PM EDT Sun May 15 2022

INC045-157-171-152115-
/O.CON.KIND.SV.W.0033.000000T0000Z-220515T2115Z/
Fountain IN-Tippecanoe IN-Warren IN-
503 PM EDT Sun May 15 2022

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 515 PM EDT
FOR NORTHEASTERN FOUNTAIN...WESTERN TIPPECANOE AND EAST CENTRAL
WARREN COUNTIES...

At 503 PM EDT, a severe thunderstorm was located near West Lafayette,
or near Otterbein, moving east at 25 mph.

HAZARD...Quarter size hail.

SOURCE...Radar indicated.

IMPACT...Damage to vehicles is expected.

Locations impacted include...
Lafayette, West Lafayette, Williamsport, Attica, Shadeland and Purdue
University.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

&&

LAT...LON 4056 8695 4030 8686 4021 8737 4032 8729
      4045 8712 4048 8709 4050 8709 4056 8696
TIME...MOT...LOC 2103Z 248DEG 23KT 4042 8700 

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...<50 MPH

$$

Puma

422 
WWUS53 KIND 152110
SVSIND

Severe Weather Statement
National Weather Service Indianapolis IN
510 PM EDT Sun May 15 2022

INC045-157-171-152120-
/O.EXP.KIND.SV.W.0033.000000T0000Z-220515T2115Z/
Fountain IN-Tippecanoe IN-Warren IN-
510 PM EDT Sun May 15 2022

...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN FOUNTAIN...
WESTERN TIPPECANOE AND EAST CENTRAL WARREN COUNTIES WILL EXPIRE AT
515 PM EDT...
                
The storm which prompted the warning has weakened below severe
limits, and no longer poses an immediate threat to life or property.
Therefore, the warning will be allowed to expire.

A Severe Thunderstorm Watch remains in effect until 900 PM EDT for
west central Indiana.

LAT...LON 4056 8695 4030 8686 4021 8737 4032 8729
      4045 8712 4048 8709 4050 8709 4056 8696
TIME...MOT...LOC 2110Z 240DEG 22KT 4043 8698 

$$

Puma

Area Forecast Discussion
National Weather Service Indianapolis IN
218 PM EDT Sun May 15 2022

.Short Term...(This evening through Monday night)
Issued at 218 PM EDT Sun May 15 2022

- Strong to Severe Storms possible this evening and
overnight

Surface analysis early this afternoon shows a weak trough of low
pressure in place from MI...across IL to SW MO. Convection was
present over MO with this feature. GOES16 shows high
cloud/convective debris over IL advancing east toward Indiana.
Winds were light and mainly westerly across the forecast as high
pressure was found over the southeastern states. Dew Points have
fallen to the mid 50s as some dry air aloft has been mixing down.

Tonight...

Convective temperatures are expected to be reached this
afternoon...leading to CU developing and perhaps and isolated
shra/tsra as CAPE values linger around 1000 J/KG. Thus will continue
with increasing pops late this afternoon and early evening.

A short wave aloft over the plains is depicted by the models is
responsible for the previously mentioned weak surface trough and
associated convection. This feature is expected to push toward
Indiana tonight and cross the state overnight. With favorable
moisture in place...showers and thunderstorm development is expected
late this evening as the wave passes. Forecast soundings show a
saturated column by 03Z...and HRRR depicts showers and storms
pushing through Indiana during the late evening. With a loss of
heating...best instability will be gone...but an isolated evening
severe thunderstorm cannot be ruled out. Will use high pops this
evening as these forcing features pass.

Subsidence and drying is shown in the column by 09Z...thus will
trend toward dry forecast late overnight after the wave is expected
to pass to the east.

Regarding eclipse viewing...clouds from convection and the passing
wave will make it difficult to nearly impossible to view the lunar
eclipse tonight. Perhaps Indiana will have better luck on November 8
2022.

Monday and Monday Night...

Models continue to depict a quick NW flow aloft across Indiana on
Monday. A strong ridge aloft will be found across the
Rockies...allowing for NW flow along with subsidence across the
plains spilling into the Ohio Valley. Forecast soundings on Monday
show a dry column but convective temps may be reached in the
afternoon with some sct flat topped CU due to an inversion aloft.
Thus will trend toward a mostly sunny day and mostly clear night.

&&

.Long Term...(Tuesday through Sunday)
Issued at 218 PM EDT Sun May 15 2022

The synoptic pattern on Tuesday will feature a digging but
progressive trough across Quebec into the northeast states, and an
eastward progressing but deamplifying upper level ridge across the
west and central part of the country. Mean northwesterly flow over
Indiana will result, but trend zonal. This will hold temperatures
near or just below mid-May climatology through Wednesday.

Within the increasingly zonal/quasi-zonal flow pattern, a few
midlevel perturbations will move through the area.

Perturbation #1 arrives late Tuesday night, inducing modest
warm/moist advection and some light to moderate precipitation
especially just to our north. The greater QPF signal in the models
appears to be tied to upscale growth and MCS evolution from Plains
convection that reaches our area early Wednesday. Spatiotemporal
details with these type of events are notoriously difficult at this
time range, given several smaller scale difficult to resolve
influencing factors. One possible scenario may be a tendency for the
MCS to build southward on preferential flank of cold pool where it
interacts with modest low level jet. In this scenario, precipitation
would mostly move southwest of our area. Ensemble members seem
evenly split with a more northward or southward track.

Perturbation #2 will arrive late Wednesday and would be more
productive at convective generation if antecedent convection hasn't
overturned the environment. In this conditional scenario,
instability and shear would be sufficient for organized
strong/severe thunderstorms.

Perturbation #3 should arrive late Thursday, although at this time
range GEFS/EPS ensemble members are more chaotic so there are
varying QPF footprints and magnitude. Instability and shear will
again be sufficient for strong to severe thunderstorms, if they
occur in our area.

A deeper closed low is shown in most medium range models over the
northern Plains or northern Rockies, though individual ensembles and
deterministic are quite out of phase by this time range. Most show
an intense enough mid-latitude system with established warm conveyor
belt, anomalous moisture, and forcing for significant convective
development along the trailing cold front. This could occur in our
area anytime from late Friday afternoon to Saturday afternoon, given
the current spread in the models. In either case, we will see around
10 degree positive 2m temperature anomalies preceding the system,
and only modest cold advection in its wake next weekend given
consensus on a northeastward track, despite timing and amplitude
differences. If models trend more closed and northwestward with the
track, impactful/widespread convection would be less likely at this
latitude and this far east. We will refine as model spread lessens
over the next few days.

&&

.Aviation...(18Z TAF Issuance)
Issued at 100 PM EDT Sun May 15 2022

IMPACTS:

- VFR this afternoon
- Brief MVFR possible between 22Z-05Z with passing shra and tsra
expected.

DISCUSSION: Convective temps in the lower 80s are expected to be
reached this afternoon and CU development is expected. GOES16 shows
convective debris clouds over MO/IL streaming east within the flow
aloft. Thus expect VFR conditions with increasing cloud coverage
this afternoon.

A short wave is expected to push toward Indiana late this afternoon
and pass across the state tonight. Diurnal convection head of the
approaching wave will lead to some sct-isolated shra/tsra late this
afternoon and early evening before stronger forcing arrives
overnight. Have used a VCTS mention for the chances for low coverage
showers/storms this evening...but per HRRR trended toward
prevailing groups of MVFR conditions overnight as the forcing from
the passing wave is expected to pass and generate showers and storms.

In the wake of the short wave a quick return to VFR is expected as
subsidence resumes and forecast soundings depict a dry column.

&&

.IND WATCHES/WARNINGS/ADVISORIES...
None.
&&

Short Term...Puma
Long Term...BRB
Aviation...Puma

Hazardous Weather Outlook
National Weather Service Indianapolis IN
331 PM EDT Sun May 15 2022

INZ021-028>031-035>049-051>057-060>065-067>072-161945-
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 Delphi, Flora, Williamsport, West Lebanon,
Lafayette, West Lafayette, Frankfort, Kokomo, Attica, Covington,
Veedersburg, Crawfordsville, Lebanon, Zionsville, Tipton, Fishers,
Carmel, Noblesville, Anderson, Muncie, Winchester, Union City,
Farmland, Parker City, Clinton, Fairview Park, Rockville, Montezuma,
Rosedale, Greencastle, Plainfield, Brownsburg, Danville,
Indianapolis, Greenfield, New Castle, Terre Haute, Brazil, Spencer,
Gosport, Martinsville, Mooresville, Greenwood, Franklin,
Shelbyville, Rushville, Sullivan, Carlisle, Shelburn, Farmersburg,
Linton, Bloomfield, Jasonville, Worthington, Bloomington, Nashville,
Columbus, Greensburg, Vincennes, Washington, Loogootee, Shoals,
Bedford, Mitchell, Seymour, and North Vernon
331 PM EDT Sun May 15 2022

This hazardous weather outlook is for central Indiana.

.DAY ONE...Tonight.

There is a SLIGHT RISK for severe thunderstorms tonight through the
eevening and early overnight hours across most of Central Indiana.
Damaging winds are the primary threat with large hail also possible.
Lightning is a threat with any thunderstorm.

.DAYS TWO THROUGH SEVEN...Monday through Saturday.

Thunderstorm chances return Wednesday with small chances for
additional storms into the weekend.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is possible late this afternoon and evening.

&&

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