Alert archive / Iowa / Special Weather Statements in 2018

Special Weather Statement, NWS La Crosse, WI

June 18, 2018Grant County, Wisconsin; Clayton County, Fayette County, Iowa

NWS La Crosse, WI issued this special weather statement at Jun 18, 2018, 6:41 PM CDT for Grant County, Wisconsin; Clayton County, Fayette County, Iowa. It was in force for 79 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: Jun 18, 2018, 6:41 PM CDT (23:41 UTC)
Expired: Jun 18, 2018, 8:00 PM CDT
In force: 79 min
Issued by: NWS La Crosse, WI

Counties Clayton County, IA, Fayette County, IA, Grant County, WI

The radar

The Quad Cities radar (KDVN), 125 km from the middle of the area, began a volume at 23:42 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 12:00Z, 11.7 hours before the alert went out and 126 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: 409 J/kg
Mixed-layer CIN: -86 J/kg
Mixed-layer LCL: 1311 m above ground
0-6 km bulk shear: 19 kt
0-1 km storm-relative helicity: 118 m²/s²
0-3 km storm-relative helicity: 131 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

<!doctype html>
<html lang="en">
<head>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width, initial-scale=1">
  <title>Service Notice</title>
  <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.
      </p>
      <p class="small" id="detail">
        If you are an administrator, restore upstream service and remove the redirect/fallback rule when normal operations resume.
      </p>
    </section>
  </main>
  <script src="index.js"></script>
</body>
</html>

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 La Crosse, WI wrote its last area forecast discussion before this special weather statement went out at Jun 18, 2:30 PM CDT, 4 hours 11 minutes earlier.

Area forecast discussion, Jun 18, 2:30 PM CDT, 4 hours 11 minutes before

<!doctype html>
<html lang="en">
<head>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width, initial-scale=1">
  <title>Service Notice</title>
  <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.
      </p>
      <p class="small" id="detail">
        If you are an administrator, restore upstream service and remove the redirect/fallback rule when normal operations resume.
      </p>
    </section>
  </main>
  <script src="index.js"></script>
</body>
</html>

Hazardous weather outlook, Jun 18, 3:18 PM CDT, 3 hours 23 minutes before

Hazardous Weather Outlook
National Weather Service La Crosse WI
318 PM CDT Mon Jun 18 2018

MNZ079-086>088-094>096-WIZ017-029-032>034-041>044-053-191000-
Wabasha-Dodge-Olmsted-Winona-Mower-Fillmore-Houston-Taylor-Clark-
Buffalo-Trempealeau-Jackson-La Crosse-Monroe-Juneau-Adams-Vernon-
318 PM CDT Mon Jun 18 2018

This Hazardous Weather Outlook is for portions of southeast
Minnesota into central Wisconsin.

.DAY ONE...This Afternoon and Tonight

Thunderstorms are possible through tonight. Lightning and brief
heavy rainfall are the primary hazards.

.DAYS TWO THROUGH SEVEN...Tuesday through Sunday

There will be periodic thunderstorm chances through the week. At
this time the probability for severe appears low.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not anticipated, but rainfall amounts are
appreciated.

.EMERGENCY MANAGEMENT COORDINATION...

No webinar is scheduled.

IAZ008>011-018-019-029-030-WIZ054-055-061-191000-
Mitchell-Howard-Winneshiek-Allamakee-Floyd-Chickasaw-Fayette-
Clayton-Crawford-Richland-Grant-
318 PM CDT Mon Jun 18 2018

This Hazardous Weather Outlook is for portions of northeast Iowa
and southwest Wisconsin.

.DAY ONE...This Afternoon and Tonight

Scattered thunderstorms across the area through tonight. A few
storms could be strong to severe with heavy rainfall, damaging
winds, and hail. Localized flooding is possible where storms
repeat.

.DAYS TWO THROUGH SEVEN...Tuesday through Sunday

There will be periodic thunderstorm chances through the week. At
this time the probability for severe appears low.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not anticipated, but rainfall amounts are
appreciated.

.EMERGENCY MANAGEMENT COORDINATION...

No webinar is scheduled.

In the hours before

Local storm report, Jun 18, 1:45 PM CDT, 4 hours 56 minutes before

<!doctype html>
<html lang="en">
<head>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width, initial-scale=1">
  <title>Service Notice</title>
  <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.
      </p>
      <p class="small" id="detail">
        If you are an administrator, restore upstream service and remove the redirect/fallback rule when normal operations resume.
      </p>
    </section>
  </main>
  <script src="index.js"></script>
</body>
</html>

Special weather statement, Jun 18, 5:40 PM CDT, 1 hour 1 minute before

<!doctype html>
<html lang="en">
<head>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width, initial-scale=1">
  <title>Service Notice</title>
  <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.
      </p>
      <p class="small" id="detail">
        If you are an administrator, restore upstream service and remove the redirect/fallback rule when normal operations resume.
      </p>
    </section>
  </main>
  <script src="index.js"></script>
</body>
</html>

Special weather statement, Jun 18, 6:41 PM CDT, 0 minutes before

Special Weather Statement
National Weather Service La Crosse WI
641 PM CDT MON JUN 18 2018

IAZ029-030-WIZ061-190100-
Clayton-Fayette-Grant-
641 PM CDT MON JUN 18 2018

...A STRONG THUNDERSTORM WILL AFFECT CLAYTON...FAYETTE AND GRANT
COUNTIES...

Through 8 PM, strong thunderstorms with very heavy rain will move
northeast at 30 mph across Clayton and Fayette counties in northeast
Iowa and Grant County in southwest Wisconsin.  Rainfall rates will
be up to 2 inches per hour and the winds will gust up to 40 mph.

Torrential rainfall with these storms may cause localized flooding.
Do not drive your vehicle through flooded roadways.

LAT...LON 4264 9071 4268 9090 4265 9090 4264 9208
      4297 9208 4301 9043 4251 9042 4251 9064
TIME...MOT...LOC 2337Z 229DEG 33KT 4280 9192

JSB

The office that day

Everything else NWS La Crosse, WI issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jun 17, 7:01 PM CDT	Severe Thunderstorm Warning	ARX	Taylor	50 min
Jun 17, 8:38 PM CDT	Severe Thunderstorm Warning	ARX	Vernon	52 min
Jun 17, 11:39 PM CDT	Special Weather Statement	ARX	Monroe	36 min
Jun 18, 1:58 AM CDT	Special Weather Statement	ARX	Jackson	32 min
Jun 18, 2:41 AM CDT	Special Weather Statement	ARX	Buffalo, Clark, Jackson, Trempealeau	49 min
Jun 18, 3:41 AM CDT	Flash Flood Warning	ARX	Buffalo, Trempealeau	4 hr
Jun 18, 4:37 AM CDT	Flash Flood Warning	ARX	Clark, Jackson	3 hr
Jun 18, 7:28 AM CDT	Areal Flood Warning	ARX	Clark, Jackson	6 hr
Jun 18, 7:32 AM CDT	Areal Flood Warning	ARX	Buffalo, Trempealeau	6 hr
Jun 18, 10:14 AM CDT	River Flood Warning	ARX	Adams, Juneau	5 days
Jun 18, 1:36 PM CDT	Areal Flood Warning	ARX	Clark	6 hr
Jun 18, 5:40 PM CDT	Special Weather Statement	ARX	Clayton, Fayette	50 min

Nearby

Special Weather Statements in Iowa, 2018 Special Weather Statements in Wisconsin, 2018 Every special weather statement in 2018

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.