Alert archive / Indiana / Special Weather Statements in 2012

Special Weather Statement, NWS Northern Indiana

July 17, 2012Allen County, Indiana

NWS Northern Indiana issued this special weather statement at Jul 17, 2012, 4:21 PM EDT for Allen County, Indiana. It was in force for 39 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
Jul 17, 2012, 4:21 PM EDT (20:21 UTC)
Expired
Jul 17, 2012, 5:00 PM EDT
In force
39 min
Issued by
NWS Northern Indiana

County Allen County, IN

The radar

The Northern Indiana radar (KIWX), 76 km from the middle of the area, began a volume at 20:23 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, 8.4 hours before the alert went out and 209 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 2012-07-17Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2344 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Cncnati-Daytn, OH at 12:00Z on 2012-07-17The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -44 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
2344 J/kg
Mixed-layer CIN
-38 J/kg
Mixed-layer LCL
979 m above ground
0-6 km bulk shear
5 kt
0-1 km storm-relative helicity
-44 m²/s²
0-3 km storm-relative helicity
-20 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

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

793 
WWUS83 KIWX 172021
SPSIWX

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE NORTHERN INDIANA
421 PM EDT TUE JUL 17 2012

INZ018-OHZ015-172100-
ALLEN IN-PAULDING OH-
421 PM EDT TUE JUL 17 2012

...STRONG THUNDERSTORMS MOVING TOWARD WESTERN PAULDING AND EAST 
CENTRAL ALLEN COUNTIES...

AT 420 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A 
RAPIDLY DEVELOPING THUNDERSTORM NEAR NEW HAVEN...MOVING EAST AT 25
MPH.

WINDS GREATER THAN 40 MPH...OCCASIONAL CLOUD TO GROUND LIGHTNING AND
BRIEF HEAVY DOWNPOURS ARE POSSIBLE WITH THIS STORM.

LOCATIONS IN THE PATH OF THIS STORM INCLUDE...
  WOODBURN...
  ANTWERP...
  PAYNE...
  ZULU...
  EDGERTON...
  MCGILL...

GUSTY WINDS MAY CAUSE SMALL OBJECTS SUCH AS TRASH BINS TO BLOW
AROUND. STAY AWAY FROM HIGH OBJECTS OUTDOORS SUCH AS TREES. 

SEEK SHELTER IN A STURDY STRUCTURE UNTIL THIS STORM HAS PASSED.

LAT...LON 4123 8463 4099 8464 4106 8515 4116 8514
TIME...MOT...LOC 2021Z 274DEG 20KT 4109 8497

$$

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 17, 2:55 PM EDTSpecial Weather StatementIWXWhitley50 min
Jul 17, 3:08 PM EDTSpecial Weather StatementIWXFulton52 min
Jul 17, 3:25 PM EDTSpecial Weather StatementIWXHuntington50 min
Jul 17, 3:38 PM EDTSevere Thunderstorm WarningIWXKosciusko19 min
Jul 17, 4:51 PM EDTSpecial Weather StatementIWXCass, Grant, Huntington, Miami, Wabash54 min
Jul 17, 4:56 PM EDTSevere Thunderstorm WarningIWXMiami, Wabash49 min
Jul 17, 5:51 PM EDTSpecial Weather StatementIWXHuntington, Wells54 min
Jul 17, 7:54 PM EDTSpecial Weather StatementIWXLaGrange66 min
Jul 17, 5:03 PM EDTSpecial Weather StatementIWXPaulding42 min
Jul 17, 6:01 PM EDTSpecial Weather StatementIWXAllen59 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.