Alert archive / Illinois / High Wind Watches in 2016

High Wind Watch 1, NWS Chicago, IL

March 15, 201612 counties in Illinois; Lake County, Porter County, Indiana

NWS Chicago, IL issued this high wind watch at Mar 15, 2016, 3:50 AM CDT for 12 counties in Illinois; Lake County, Porter County, Indiana. It took effect at Mar 16, 2016, 7:00 AM CDT. It was in force for .

The area

The counties it named.

The facts

Issued
Mar 15, 2016, 3:50 AM CDT (08:50 UTC)
In effect from
Mar 16, 2016, 7:00 AM CDT
Expired
Mar 16, 2016, 3:58 AM CDT
In force
Issued by
NWS Chicago, IL

Counties Boone County, IL, DeKalb County, IL, DuPage County, IL, Grundy County, IL, Kane County, IL, Kendall County, IL, Lake County, IL, LaSalle County, IL, Lee County, IL, McHenry County, IL, Ogle County, IL, Winnebago County, IL, Lake County, IN, Porter County, IN

The radar

The Chicago radar (KLOT), 42 km from the middle of the area, began a volume at 08:56 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

Davenport, (KDVN), launched 00:00Z, 8.8 hours before the alert went out and 172 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, Davenport, at 00:00Z on 2016-03-15Temperature 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, Davenport, at 00:00Z on 2016-03-15The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 83 square meters per square second.193958Sfc1 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
750 m above ground
0-6 km bulk shear
26 kt
0-1 km storm-relative helicity
83 m²/s²
0-3 km storm-relative helicity
111 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this high wind watch went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Chicago, IL wrote its last area forecast discussion before this high wind watch went out at Mar 15, 3:48 AM CDT, 2 minutes earlier.

Area forecast discussion, Mar 15, 3:48 AM CDT, 2 minutes before
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Hazardous weather outlook, Mar 14, 3:40 PM CDT, 12 hours 10 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.
      </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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The office that day

Everything else NWS Chicago, IL issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Mar 15, 2:54 AM CDTGale WarningLOT54 hr
Mar 15, 2:54 AM CDTSmall Craft AdvisoryLOT22 hr
Mar 15, 2:54 AM CDTStorm WatchLOT24 hr
Mar 15, 1:10 PM CDTSpecial Weather StatementLOTWinnebago50 min
Mar 15, 1:56 PM CDTSpecial Weather StatementLOTBoone49 min
Mar 15, 3:06 PM CDTWind AdvisoryLOTBoone, DeKalb, DuPage, Ford, Grundy, Iroquois and 10 more29 hr

Nearby

High Wind Watches in Illinois, 2016High Wind Watches in Indiana, 2016Every high wind watch 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.