Alert archive / Indiana / Special Weather Statements in 2012

Special Weather Statement, NWS Indianapolis, IN

September 2, 2012Marion County, Indiana

NWS Indianapolis, IN issued this special weather statement at Sep 2, 2012, 3:43 PM EDT for Marion County, Indiana. It was in force for 47 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
Sep 2, 2012, 3:43 PM EDT (19:43 UTC)
Expired
Sep 2, 2012, 4:30 PM EDT
In force
47 min
Issued by
NWS Indianapolis, IN

County Marion County, IN

The radar

The Indianapolis radar (KIND), 22 km from the middle of the area, began a volume at 19:47 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, 7.7 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, Cncnati-Daytn, OH at 12:00Z on 2012-09-02Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 822 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, Cncnati-Daytn, OH at 12:00Z on 2012-09-02The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 51 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
822 J/kg
Mixed-layer CIN
-26 J/kg
Mixed-layer LCL
622 m above ground
0-6 km bulk shear
24 kt
0-1 km storm-relative helicity
51 m²/s²
0-3 km storm-relative helicity
58 m²/s²
Significant tornado parameter
0.1
Supercell composite
1.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

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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 Sep 1, 6:51 PM EDT, 20 hours 52 minutes earlier.

Area forecast discussion, Sep 1, 6:51 PM EDT, 20 hours 52 minutes before
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  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width, initial-scale=1">
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  <link rel="stylesheet" href="index.css">
</head>
<body>
  <main class="wrap">
    <section class="card" role="status" aria-live="polite">
      <div class="status" id="status">Temporary Notice</div>
      <h1 id="headline">This service is currently unavailable.</h1>
      <p id="message1">
        The site you requested is temporarily down for maintenance or an unexpected outage.
      </p>
      <p id="message2">
        Please try again in a few minutes.
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        If you are an administrator, restore upstream service and remove the redirect/fallback rule when normal operations resume.
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Hazardous weather outlook, Sep 1, 5:38 PM EDT, 22 hours 5 minutes before
HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE INDIANAPOLIS IN
538 PM EDT SAT SEP 1 2012

INZ021-028>031-035>049-051>057-060>065-067>072-022145-
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-
538 PM EDT SAT SEP 1 2012

THIS HAZARDOUS WEATHER OUTLOOK IS FOR CENTRAL INDIANA.

.DAY ONE...TONIGHT.

OUTLOOK: PERIODIC RAIN AND ISOLATED THUNDERSTORMS ARE FORECAST
TONIGHT.

HAZARDS: ISOLATED THUNDERSTORMS CAN PRODUCE VERY HEAVY RAINFALL
...DEADLY LIGHTNING...AND BRIEF GUSTY WINDS.

TIMING: TONIGHT.

DISCUSSION: THE REMAINS OF ISAAC HAVE OFFICIALLY BEEN DECLARED
EXTRA TROPICAL BY HPC. THIS SYSTEM WILL DRIFT SLOWLY EAST ACROSS OUR
REGION THE NEXT FEW DAYS PRODUCING VERY WET WEATHER LATER TONIGHT.

.DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY.

OUTLOOK: MORE WIDESPREAD RAIN WILL DEVELOP ACROSS CENTRAL INDIANA ON
SUNDAY. ISOLATED THUNDERSTORMS ARE POSSIBLE SUNDAY THROUGH EARLY
TUESDAY...AND THEN ADDITIONAL THUNDERSTORM CHANCES ARE POSSIBLE
WEDNESDAY AND WEDNESDAY NIGHT. NO SEVERE WEATHER IS ANTICIPATED AT
THIS TIME...HOWEVER ANY THUNDERSTORMS CAN CONTAIN DANGEROUS
LIGHTNING AND VERY HEAVY RAINFALL.

DISCUSSION: A SYSTEM WILL DRIFT SLOWLY EAST ACROSS OUR REGION THE
NEXT FEW DAYS PRODUCING VERY WET WEATHER THROUGH
SUNDAY. MONDAY WILL STILL BE WET...BUT RAIN AMOUNTS WILL BE
LIGHTER. AFTER THE SYSTEM PULLS AWAY FROM THE AREA...WEAK HIGH
PRESSURE WILL AFFECT US AROUND TUESDAY. THEN A COLD FRONT WILL
MOVE THROUGH BY LATE WEDNESDAY AS AN UPPER TROUGH DIGS INTO THE
UPPER MIDWEST AND GREAT LAKES. DRY WEATHER AND BELOW NORMAL
TEMPERATURES WILL BE THE RULE BY LATE NEXT WEEK.

.SPOTTER INFORMATION STATEMENT...

SPOTTERS ARE ENCOURAGED TO CALL IN WITH PRECIPITATION AMOUNT REPORTS
OR OTHERWISE TONIGHT THROUGH SUNDAY.

&&

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

SMF

The office that day

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

IssuedProductOfficeCountiesLasted
Sep 2, 2:52 PM EDTAreal Flood AdvisoryINDBoone, Hendricks, Montgomery, Morgan, Putnam5 hr
Sep 2, 5:44 PM EDTAreal Flood AdvisoryINDBoone, Clinton, Delaware, Hamilton, Hancock, Henry and 3 more116 min

Nearby

Special Weather Statements in Indiana, 2012Every special weather statement in 2012

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.