Alert archive / Ohio / Special Weather Statements in 2017

Special Weather Statement, NWS Northern Indiana

May 20, 2017Allen County, Ohio

NWS Northern Indiana issued this special weather statement at May 20, 2017, 2:43 PM EDT for Allen County, Ohio. It was in force for 32 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
May 20, 2017, 2:43 PM EDT (18:43 UTC)
Expired
May 20, 2017, 3:15 PM EDT
In force
32 min
Issued by
NWS Northern Indiana

County Allen County, OH

The radar

The Cincinnati radar (KILN), 149 km from the middle of the area, began a volume at 18:46 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, 6.7 hours before the alert went out and 148 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 2017-05-20Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 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 2017-05-20The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 130 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
559 m above ground
0-6 km bulk shear
20 kt
0-1 km storm-relative helicity
130 m²/s²
0-3 km storm-relative helicity
151 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 May 20, 1:25 PM EDT, 1 hour 18 minutes earlier.

Area forecast discussion, May 20, 1:25 PM EDT, 1 hour 18 minutes before
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Hazardous weather outlook, May 20, 6:10 AM EDT, 8 hours 33 minutes before
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<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.
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      <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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In the hours before

Special weather statement, May 20, 2:43 PM EDT, 0 minutes before
Special Weather Statement
National Weather Service Northern Indiana
243 PM EDT SAT MAY 20 2017

OHZ025-201915-
Allen-
243 PM EDT SAT MAY 20 2017

...A STRONG THUNDERSTORM WILL AFFECT EASTERN ALLEN COUNTY...

At 243 PM EDT, a strong thunderstorm was located near Lima, moving
northeast at 45 mph.

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

Locations impacted include...
Lima, Bluffton, Harrod, Beaverdam, Yoder, Westminster and Rousculp.

This includes INTERSTATE 75 between MILE MARKERs 123 and 127, and
between MILE MARKERs 131 and 141.

Torrential rainfall is also occurring with this storm, and may cause
localized flooding. Do not drive your vehicle through flooded
roadways.

LAT...LON 4064 8409 4074 8409 4092 8392 4092 8388
      4064 8388
TIME...MOT...LOC 1843Z 232DEG 38KT 4074 8400

NWS

The office that day

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

IssuedProductOfficeCountiesLasted
May 20, 7:29 PM EDTTornado WarningIWXWhite31 min
May 20, 7:59 PM EDTTornado WarningIWXWhite31 min

Nearby

Special Weather Statements in Ohio, 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.