Alert archive / Wisconsin / Severe Thunderstorm Warnings in 1999

Severe Thunderstorm Warning 90, NWS La Crosse, WI

July 30, 1999Juneau County, Monroe County, Wisconsin

NWS La Crosse, WI issued this severe thunderstorm warning at Jul 30, 1999, 10:09 PM CDT for Juneau County, Monroe County, Wisconsin. It was in force for 51 min. 1 report came from inside the area while it was in force.

The area

The counties it named, with what was reported inside it.

The facts

Issued: Jul 30, 1999, 10:09 PM CDT (03:09 UTC)
Expired: Jul 30, 1999, 11:00 PM CDT
In force: 51 min
Issued by: NWS La Crosse, WI
Area: Whole counties

Counties Juneau County, WI, Monroe County, WI

The radar

The La Crosse radar (KARX), 67 km from the middle of the area, began a volume at 03:11 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.

What was reported inside it

Time	Report	Where	Remark
Jul 30, 10:15 PM CDT	Thunderstorm Wind 50	Tomah, WI

NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in.

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Jul 30, 8:00 PM CDT	Severe Thunderstorm Watch	SPC	5 hr

The nearest sounding before it

Green Bay/Straub, WI (KGRB), launched 00:00Z, 3.2 hours before the alert went out and 191 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: 7703 J/kg
Mixed-layer CIN: -6 J/kg
Mixed-layer LCL: 1183 m above ground
0-6 km bulk shear: 26 kt
0-1 km storm-relative helicity: 38 m²/s²
0-3 km storm-relative helicity: 40 m²/s²
Significant tornado parameter: 1.1
Supercell composite: 7.4

Open this sounding in Storm Lab

The text

The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.

What forecasters said that day

The local office's own words before this severe thunderstorm warning 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 severe thunderstorm warning went out at Jul 30, 9:34 PM CDT, 35 minutes earlier.

Area forecast discussion, Jul 30, 9:34 PM CDT, 35 minutes before

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In the hours before

Local storm report, Jul 30, 5:33 PM CDT, 4 hours 36 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE LA CROSSE WI
533 PM CDT FRI JUL 30 1999

TIME(CDT)  .....CITY LOCATION.....STATE   ...EVENT/REMARKS...
           ....COUNTY LOCATION....

0504 PM    WHITEHALL                 WI   WIND DAMAGE
07/30/99   TREMPEALEAU                    TREES DOWN ESTIMATED WINDS
                                          TO 60 MPH

NELSON

Local storm report, Jul 30, 10:05 PM CDT, 4 minutes before

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<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.
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The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 30, 7:50 PM CDT	Severe Thunderstorm Warning	ARX	Mitchell	70 min
Jul 30, 7:32 PM CDT	Severe Thunderstorm Warning	ARX	Taylor	58 min
Jul 30, 8:36 PM CDT	Severe Thunderstorm Warning	ARX	Clark, Taylor	54 min
Jul 30, 7:35 PM CDT	Severe Thunderstorm Warning	ARX	Dodge, Mower, Olmsted	70 min

Nearby

Severe Thunderstorm Warnings in Wisconsin, 1999 Every severe thunderstorm warning in 1999

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.