Alert archive / Indiana / Special Weather Statements in 2016

Special Weather Statement, NWS Indianapolis, IN

August 28, 2016Knox County, Indiana

NWS Indianapolis, IN issued this special weather statement at Aug 28, 2016, 10:34 PM EDT for Knox County, Indiana. It was in force for 41 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 28, 2016, 10:34 PM EDT (02:34 UTC)
Expired
Aug 28, 2016, 11:15 PM EDT
In force
41 min
Issued by
NWS Indianapolis, IN

County Knox County, IN

The radar

The Evansville,IN radar (KVWX), 38 km from the middle of the area, began a volume at 02:35 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 00:00Z, 2.6 hours before the alert went out and 200 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 00:00Z on 2016-08-29Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 870 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 00:00Z on 2016-08-29The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 108 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
870 J/kg
Mixed-layer CIN
-65 J/kg
Mixed-layer LCL
1034 m above ground
0-6 km bulk shear
25 kt
0-1 km storm-relative helicity
108 m²/s²
0-3 km storm-relative helicity
180 m²/s²
Significant tornado parameter
0.3
Supercell composite
2.6

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 28, 10:30 PM EDT, 4 minutes earlier.

Area forecast discussion, Aug 28, 10:30 PM EDT, 4 minutes before
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Hazardous weather outlook, Aug 28, 9:42 PM EDT, 52 minutes before
HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE INDIANAPOLIS IN
942 PM EDT SUN AUG 28 2016

INZ021-028>031-035>049-051>057-060>065-067>072-300145-
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
942 PM EDT SUN AUG 28 2016

THIS HAZARDOUS WEATHER OUTLOOK IS FOR CENTRAL INDIANA.

.DAY ONE...TONIGHT.

OUTLOOK: ISOLATED THUNDERSTORMS. PATCHY FOG.

HAZARDS: LIGHTNING...HEAVY DOWNPOURS AND GUSTY WINDS FROM
THUNDERSTORMS. REDUCED VISIBILITIES IN FOG.

TIMING: ISOLATED THUNDERSTORMS THROUGH 2 AM. PATCHY FOG
OVERNIGHT.

DISCUSSION: ISOLATED THUNDERSTORMS HAVE DEVELOPED IN THE WARM AND
UNSTABLE AIRMASS. EXPECT THESE TO DIMINISH AFTER MIDNIGHT. PATCHY
FOG WILL DEVELOP OVERNIGHT.

.DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY.

OUTLOOK: THERE ARE OFF AND ON CHANCES FOR THUNDERSTORMS THROUGH
THE FIRST HALF OF THE WEEK...WITH THE BEST CHANCES FOR STORMS ON
WEDNESDAY. AT THIS TIME WIDESPREAD SEVERE STORMS ARE NOT EXPECTED.
LIGHTNING...HEAVY RAIN...AND GUSTY WINDS WILL BE THE MAIN THREATS.

DISCUSSION: A WARM HUMID AIR MASS AND WEAK UPPER WAVES NEARBY WILL
KEEP OFF AND ON THUNDERSTORM CHANCES IN THE FORECAST UNTIL A COLD
FRONT MOVES THROUGH ON WEDNESDAY AND USHERS IN COOLER DRIER AIR.

.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)

RYAN

In the hours before

Local storm report, Aug 28, 8:51 PM EDT, 1 hour 43 minutes before
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Local storm report, Aug 28, 9:21 PM EDT, 1 hour 13 minutes before
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Local storm report, Aug 28, 9:30 PM EDT, 1 hour 4 minutes before
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Local storm report, Aug 28, 10:22 PM EDT, 12 minutes before
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Local storm report, Aug 28, 10:24 PM EDT, 10 minutes before
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Special weather statement, Aug 28, 10:34 PM EDT, 0 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE INDIANAPOLIS IN
1034 PM EDT SUN AUG 28 2016

INZ067-290315-
KNOX IN-
1034 PM EDT SUN AUG 28 2016

...SIGNIFICANT WEATHER ADVISORY FOR SOUTHWESTERN KNOX COUNTY UNTIL
1115 PM EDT...

AT 1034 PM EDT...DOPPLER RADAR WAS TRACKING A STRONG THUNDERSTORM
NEAR VINCENNES...MOVING NORTHWEST AT 20 MPH.

NICKEL SIZE HAIL AND WIND GUSTS UP TO 50 MPH WILL BE POSSIBLE WITH
THIS STORM.

LOCATIONS IMPACTED INCLUDE...
VINCENNES...MONROE CITY...WHEATLAND...
DECKER AND VINCENNES UNIVERSITY.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

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

&&

LAT...LON 3848 8771 3851 8765 3855 8767 3859 8764
      3859 8761 3864 8762 3869 8753 3875 8750
      3866 8726 3865 8725 3852 8732 3854 8737
      3851 8738 3854 8740 3853 8748 3850 8749
      3852 8755 3849 8754 3850 8758 3845 8761
TIME...MOT...LOC 0234Z 123DEG 16KT 3860 8749

RYAN

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 28, 10:41 PM EDTFlash Flood WarningINDKnox3 hr
Aug 28, 10:52 PM EDTSevere Thunderstorm WarningINDKnox22 min
Aug 28, 11:40 PM EDTFlash Flood WarningINDSullivan3 hr
Aug 29, 1:33 AM EDTAreal Flood WarningINDKnox6 hr
Aug 29, 3:07 AM EDTAreal Flood WarningINDFountain, Montgomery, Tippecanoe, Warren6 hr

Nearby

Special Weather Statements in Indiana, 2016Every 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.