Alert archive / Indiana / Special Weather Statements in 2017

Special Weather Statement, NWS Northern Indiana

August 1, 2017Starke County, Indiana

NWS Northern Indiana issued this special weather statement at Aug 1, 2017, 5:31 PM CDT for Starke County, Indiana. It was in force for 29 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 1, 2017, 5:31 PM CDT (22:31 UTC)
Expired
Aug 1, 2017, 6:00 PM CDT
In force
29 min
Issued by
NWS Northern Indiana

County Starke County, IN

The radar

The Northern Indiana radar (KIWX), 82 km from the middle of the area, began a volume at 22:34 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

Lincoln, IL (KILX), launched 12:00Z, 10.5 hours before the alert went out and 207 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 12:00Z on 2017-08-01Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 502 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 12:00Z on 2017-08-01The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 17 square meters per square second.1939Sfc1 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
502 J/kg
Mixed-layer CIN
-42 J/kg
Mixed-layer LCL
1129 m above ground
0-6 km bulk shear
14 kt
0-1 km storm-relative helicity
17 m²/s²
0-3 km storm-relative helicity
49 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

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 Northern Indiana wrote its last area forecast discussion before this special weather statement went out at Aug 1, 2:54 PM CDT, 2 hours 37 minutes earlier.

Area forecast discussion, Aug 1, 2:54 PM CDT, 2 hours 37 minutes before
Area Forecast Discussion
National Weather Service Northern Indiana
354 PM EDT Tue Aug 1 2017

.SYNOPSIS...
Issued at 346 PM EDT Tue Aug 1 2017

Showers and storms can be expected late this afternoon into this
evening as a weak upper level system combines with afternoon
heating. After a short break in the activity, more storms are
expected Wednesday and Thursday as upper level systems move into
the area. A strong cold front will arrive Thursday night and bring
much cooler weather to the area Friday.

&&

.SHORT TERM...(This Evening through Wednesday)
Issued at 347 PM EDT Tue Aug 1 2017

A weak upper level system, weak return flow and diurnal heating have
combined to trigger scattered showers and storms across the area
through mid afternoon. Surface based CAPES have topped 2500 J/Kg per
SPC meso analysis near Monticello.  The activity will remain pulse
type and should stay relatively unorganized with maximum wind
gusts under 40 mph and possibly pea-sized. Storms should dissipate
by early tonight.

More storms are expected to develop Wednesday as an upper level TROF
moves southeast into the area. Storm activity should be accentuated
by diurnal heating and may become rather numerous by late in the
day. Severe storms are not expected given very little shear;
however, maximum wind gusts could reach between 30 and 40 mph given
downward CAPE near or topping 1000 J/kg.

&&

.LONG TERM...(Wednesday Night through Tuesday)
Issued at 347 PM EDT Tue Aug 1 2017

Storm chances will continue into Thursday and Thursday night as a
cold front and vigorous upper level system approach. There is a
chance for at least marginally severe storms late Thursday into
early Thursday night as low level wind shear increases. Chilly air
will spread across the Friday with temperatures staying in the 60s
over northwest areas. Breezing to windy conditions will lead to
dangerous swimming conditions on Lake Michigan Friday.

For Saturday through next Tuesday, the northwest flow aloft will
persist with occasional upper level disturbances providing chances
for showers and storms. Temperatures should stay below normal with
high mainly in the 70s.

&&

.AVIATION...(For the 18Z TAFS through 18Z Wednesday Afternoon)
Issued at 138 PM EDT Tue Aug 1 2017

Introduced period of VCSH at KFWA where slight increase in
coverage/intensity of showers/storms has been noted. Once the
feature causing the activity departs that should be the end of
anything at FWA. At KSBN a few showers came close but are now NE
of the area and think main coverage of additional activity will
remain SW of the area.

Could see a touch of fog at both sites overnight, but low enough
confidence to leave out for now. Risk of showers and storms will
arrive again towards the end of the forecast period.

&&

.IWX WATCHES/WARNINGS/ADVISORIES...
IN...NONE.
MI...NONE.
OH...NONE.
LM...NONE.
&&

SYNOPSIS...Skipper
SHORT TERM...Skipper
LONG TERM...Skipper
AVIATION...Fisher

Visit us at www.weather.gov/iwx

Follow us on Facebook...Twitter...and YouTube at:
www.facebook.com/NWSNorthernIndiana
www.twitter.com/nwsiwx
www.youtube.com/NWSNorthernIndiana
Hazardous weather outlook, Aug 1, 4:21 AM CDT, 13 hours 10 minutes before
Hazardous Weather Outlook
National Weather Service Northern Indiana
521 AM EDT Tue Aug 1 2017

INZ003>009-012>018-020-022>027-032>034-MIZ077>081-OHZ001-002-004-005-
015-016-024-025-020930-
La Porte-St. Joseph IN-Elkhart-Lagrange-Steuben-Noble-De Kalb-Starke-
Pulaski-Marshall-Fulton IN-Kosciusko-Whitley-Allen IN-White-Cass IN-
Miami-Wabash-Huntington-Wells-Adams-Grant-Blackford-Jay-Berrien-
Cass MI-St. Joseph MI-Branch-Hillsdale-Williams-Fulton OH-Defiance-
Henry-Paulding-Putnam-Van Wert-Allen OH-
521 AM EDT Tue Aug 1 2017 /421 AM CDT Tue Aug 1 2017/

This hazardous weather outlook is for portions of southwest
Michigan...northern Indiana and northwest Ohio.

.DAY ONE...Today and Tonight

An isolated thunderstorm is possible late this morning through early
this evening, especially along and south of Route 30. Severe weather
is not expected.

.DAYS TWO THROUGH SEVEN...Wednesday through Monday

There is a chance of thunderstorms again Wednesday into Wednesday
evening. Severe weather is not expected.

Thunderstorm chances will increase late Thursday afternoon into
Thursday night. Widespread severe weather is not expected, but an
isolated strong to severe thunderstorm cannot be ruled out west of
Interstate 69 late Thursday afternoon into Thursday evening.

.SPOTTER INFORMATION STATEMENT...

Spotter activation will not be needed today or tonight.

&&

Stay tuned to NOAA Weather Radio for further details or updates...or
check our web site at weather.gov/iwx

LMZ043-046-020930-
New Buffalo MI to St Joseph MI-Michigan City IN to New Buffalo MI-
521 AM EDT Tue Aug 1 2017

This hazardous weather outlook is for portions of The Nearshore
Waters of Southeastern Lake Michigan.

.DAY ONE...Today and Tonight

No hazardous weather is expected at this time.

.DAYS TWO THROUGH SEVEN...Wednesday through Monday

There is a chance of thunderstorms Wednesday.

Thunderstorm chances will increase late Thursday afternoon into
early Thursday evening. A few of the storms may be strong to severe.

Hazardous conditions for small craft are possible Friday and Friday
night.

&&

Stay tuned to NOAA Weather Radio for further details or updates...or
check our web site at weather.gov/iwx

In the hours before

Special weather statement, Aug 1, 3:45 PM CDT, 1 hour 46 minutes before
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Special weather statement, Aug 1, 4:17 PM CDT, 1 hour 14 minutes before
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Special weather statement, Aug 1, 4:34 PM CDT, 57 minutes before
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Special weather statement, Aug 1, 4:59 PM CDT, 32 minutes before
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Special weather statement, Aug 1, 5:00 PM CDT, 31 minutes before
Special Weather Statement
National Weather Service Northern Indiana
600 PM EDT TUE AUG 1 2017

INZ023-024-032-012230-
Wabash-Miami-Grant-
600 PM EDT TUE AUG 1 2017

...A STRONG THUNDERSTORM WILL AFFECT SOUTHWESTERN WABASH...
NORTHWESTERN GRANT AND SOUTHEASTERN MIAMI COUNTIES...

At 600 PM EDT, a strong thunderstorm was located near Bunker Hill, or
8 miles southeast of Grissom Afb, moving northeast at 20 mph.

Winds in excess of 40 mph and half inch hail are possible with this
storm.

Locations impacted include...
Wabash, La Fontaine, Converse, Amboy, Santa Fe, Richvalley,
Wawpecong, Treaty, Peoria, Jalapa and Somerset.

LAT...LON 4061 8610 4085 8593 4067 8566 4057 8584
      4056 8604 4056 8612
TIME...MOT...LOC 2200Z 221DEG 17KT 4059 8601

NWS
Special weather statement, Aug 1, 5:31 PM CDT, 0 minutes before
Special Weather Statement
National Weather Service Northern Indiana
531 PM CDT TUE AUG 1 2017

INZ012-013-012300-
Pulaski-Starke-
531 PM CDT TUE AUG 1 2017

...A STRONG THUNDERSTORM WILL AFFECT NORTH CENTRAL PULASKI AND STARKE
COUNTIES...

At 531 PM CDT, a strong thunderstorm was located over North Judson,
or 8 miles southwest of Knox, moving northeast at 25 mph.

Winds in excess of 30 mph and pea size hail are possible with this
storm.

Locations impacted include...
Knox, North Judson, Hamlet, Koontz Lake, Oak Grove, Toto, Ober,
Winona, Bass Lake, Denham, Brems and Grovertown.

LAT...LON 4128 8680 4128 8679 4132 8674 4133 8674
      4141 8669 4141 8667 4143 8664 4143 8647
      4130 8646 4125 8647 4109 8672 4118 8688
TIME...MOT...LOC 2231Z 216DEG 20KT 4119 8673

NWS

The office that day

Everything else NWS Northern Indiana issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Aug 1, 1:48 PM CDTSpecial Weather StatementIWXWhitley27 min
Aug 1, 1:51 PM CDTSpecial Weather StatementIWXCass24 min
Aug 1, 2:39 PM CDTSpecial Weather StatementIWXFulton36 min
Aug 1, 3:21 PM CDTSpecial Weather StatementIWXKosciusko24 min
Aug 1, 3:45 PM CDTSpecial Weather StatementIWXKosciusko30 min
Aug 1, 4:34 PM CDTSpecial Weather StatementIWXWhite26 min
Aug 1, 4:59 PM CDTSpecial Weather StatementIWXPulaski31 min
Aug 1, 5:00 PM CDTSpecial Weather StatementIWXMiami30 min
Aug 1, 6:12 PM CDTSpecial Weather StatementIWXSaint Joseph33 min
Aug 1, 3:37 PM CDTSpecial Weather StatementIWXWilliams23 min
Aug 1, 4:17 PM CDTSpecial Weather StatementIWXDefiance28 min

Nearby

Special Weather Statements in Indiana, 2017Every 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.