Alert archive / Ohio / Special Weather Statements in 2011

Special Weather Statement, NWS Northern Indiana

July 18, 2011Allen County, Ohio

NWS Northern Indiana issued this special weather statement at Jul 18, 2011, 6:45 PM EDT for Allen County, Ohio. It was in force for 30 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 18, 2011, 6:45 PM EDT (22:45 UTC)
Expired: Jul 18, 2011, 7:15 PM EDT
In force: 30 min
Issued by: NWS Northern Indiana

County Allen County, OH

The radar

The Cincinnati radar (KILN), 143 km from the middle of the area, began a volume at 22:46 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, 10.8 hours before the alert went out and 142 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 1057 J/kg
Mixed-layer CIN: -29 J/kg
Mixed-layer LCL: 878 m above ground
0-6 km bulk shear: 21 kt
0-1 km storm-relative helicity: 9 m²/s²
0-3 km storm-relative helicity: 22 m²/s²
Significant tornado parameter: 0.1
Supercell composite: 1.1

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 Northern Indiana wrote its last area forecast discussion before this special weather statement went out at Jul 18, 3:44 PM EDT, 3 hours 1 minute earlier.

Area forecast discussion, Jul 18, 3:44 PM EDT, 3 hours 1 minute before

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Hazardous weather outlook, Jul 18, 4:33 AM EDT, 14 hours 12 minutes before

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In the hours before

Special weather statement, Jul 18, 4:45 PM EDT, 2 hours before

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Special weather statement, Jul 18, 5:14 PM EDT, 1 hour 31 minutes before

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Special weather statement, Jul 18, 6:21 PM EDT, 24 minutes before

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Special weather statement, Jul 18, 6:45 PM EDT, 0 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE NORTHERN INDIANA
645 PM EDT MON JUL 18 2011

OHZ025-182315-
ALLEN OH-
645 PM EDT MON JUL 18 2011

...STRONG THUNDERSTORMS MOVING TOWARD SOUTHERN ALLEN COUNTY IN WEST
CENTRAL OHIO...

AT 641 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
STRONG THUNDERSTORM 6 MILES WEST OF FORT SHAWNEE...MOVING SOUTHEAST
AT 25 MPH.

PEA SIZE HAIL...WINDS UP TO 50 MPH...FREQUENT CLOUD TO GROUND
LIGHTNING AND VERY HEAVY DOWNPOURS ARE EXPECTED WITH THIS STORM.

LOCATIONS IN THE PATH OF THIS STORM INCLUDE...
  FORT SHAWNEE AND LIMA...
  HUME...
  ROUSCULP AND YODER...
  WESTMINSTER...

GUSTY WINDS MAY CAUSE SMALL BRANCHES TO BE BLOWN DOWN...AND LOOSE
OBJECTS 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 4064 8387 4064 8410 4066 8411 4065 8421
      4069 8422 4069 8433 4068 8434 4068 8437
      4069 8439 4080 8433 4069 8387
TIME...MOT...LOC 2245Z 294DEG 20KT 4068 8422

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 18, 3:59 AM EDT	Heat Advisory	IWX	Adams, Allen, Blackford, Cass, DeKalb, Elkhart and 15 more	16 hr
Jul 18, 8:07 AM EDT	Special Weather Statement	IWX	Pulaski, Starke	38 min
Jul 18, 4:45 PM EDT	Special Weather Statement	IWX	Putnam	30 min
Jul 18, 5:14 PM EDT	Special Weather Statement	IWX	Allen	31 min
Jul 18, 6:21 PM EDT	Special Weather Statement	IWX	Allen	24 min
Jul 18, 7:36 PM EDT	Special Weather Statement	IWX	Henry, Williams	24 min

Nearby

Special Weather Statements in Ohio, 2011 Every special weather statement in 2011

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.