Alert archive / Michigan / Severe Thunderstorm Warnings in 1996

Severe Thunderstorm Warning 18, NWS Detroit, MI

April 12, 1996Macomb County, Michigan

NWS Detroit, MI issued this severe thunderstorm warning at Apr 12, 1996, 8:58 PM EDT for Macomb County, Michigan. 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 counties it named.

The facts

Issued: Apr 12, 1996, 8:58 PM EDT (00:58 UTC)
Expired: Apr 12, 1996, 9:30 PM EDT
In force: 32 min
Issued by: NWS Detroit, MI
Area: Whole counties

County Macomb County, MI

The radar

The Detroit radar (KDTX), 46 km from the middle of the area, began a volume at 00:59 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

Pittsburgh, PA (KPIT), launched 00:00Z, 1.0 hours before the alert went out and 343 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 2813 m above ground
0-6 km bulk shear: 35 kt
0-1 km storm-relative helicity: 96 m²/s²
0-3 km storm-relative helicity: 144 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 2.3

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 Detroit, MI wrote its last area forecast discussion before this severe thunderstorm warning went out at Apr 12, 4:30 PM EDT, 4 hours 28 minutes earlier.

Area forecast discussion, Apr 12, 4:30 PM EDT, 4 hours 28 minutes before

STATE FORECAST DISCUSSION
NATIONAL WEATHER SERVICE DETROIT/PONTIAC MI
300 PM EDT THU APR 11 1996

A STRONG VORT MAX OVER NORTHEAST IOWA HAS MOVED VERY LITTLE THIS
AFTERNOON. ADAPS SHOWING SURFACE MOISTURE POOLING IN THE VICINITY OF
THE SURFACE WARM FRONT AND OVER NORTHERN ILLINOIS. THE THUNDERSTORMS
ARE DEVELOPING IN THE THETA-E RIDGE OVER LAKE MICHIGAN AND SOUTHWEST
LOWER MICHIGAN AND THEN MOVE EAST ACROSS LOWER MICHIGAN. THE
THUNDERSTORMS TO THE NORTH OF THE WARM FRONT BOUNDARY ARE ELEVATED.
THEREFORE SURFACE LIFTED INDICES ARE USELESS. LIFTING A PARCEL AT
700 MB ON THE DTX 18Z SOUNDING PRODUCED A LIFTED INDEX OF -3. THEREFORE
ATMOSPHERE NORTH OF SURFACE WARM FRONTAL BOUNDARY IS VERY UNSTABLE.
EQUILIBRIUM LEVEL IS IN THE 35,000 FOOT RANGE...SO WILL HAVE TO WATCH
THUNDERSTORMS THAT REACH THIS HEIGHT. HAVE RECEIVED SEVERAL REPORTS OF
LARGE HAIL ACROSS THE SOUTHERN HALF OF LOWER MICHIGAN THIS AFTERNOON.
SEVERE THREAT APPEARS TO BE EARLY TONIGHT AS VORT MAX MOVES SLOWLY EAST
ACROSS LOWER MICHIGAN. SINCE THE CONVECTION IS MAINLY ELEVATED...THE
PRIMARY THREAT OF SEVERE WEATHER WILL BE LARGE HAIL.

.DTX...SNOW ADVISORY...FAR WRN UPPER MI...LATE TONIGHT.

BOYNE

In the hours before

Local storm report, Apr 12, 4:43 PM EDT, 4 hours 15 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE DETROIT/PONTIAC MICHIGAN
445 PM EDT FRI APR 12 1996

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

412 PM     3 S HUDSON                MI   BRIEF TORNADO REPORTED VIA
04/12/96   LENAWEE                        SKYWARN SPOTTERS AND COUNTY
                                          EMERGENCY SERVICES

419 PM     3 W ADRIAN                MI   1 INCH DIAMETER HAIL VIA
04/12/96   LENAWEE                        SKYWARN SPOTTERS

422 PM     CLAYTON VILLAGE           MI   1.50 INCH DIAMETER HAIL VIA
04/12/96   LENAWEE                        SKYWARN SPOTTERS.  ONE PERSON
                                          INJURED FROM THE HAIL.

428 PM     SALINE TOWNSHIP           MI   1.50 INCH HAIL VIA EMERGENCY
04/12/96   WASHTENAW                      SERVICES

Local storm report, Apr 12, 4:48 PM EDT, 4 hours 10 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE DETROIT/PONTIAC MICHIGAN
448 PM EDT FRI APR 12 1996

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

430 PM     SALEM                     MI   1.50 INCH HAIL REPORTED VIA
04/12/96   WASHTENAW                      SKYWARN SPOTTERS

Local storm report, Apr 12, 5:08 PM EDT, 3 hours 50 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE DETROIT/PONTIAC MICHIGAN
508 PM EDT FRI APR 12 1996

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

457 PM     5 S OTTAWA                MI   TORNADO REPORTED BY COUNTY
04/12/96   MONROE                         EMERGENCY SERVICES

500 PM     2 N TOLEDO OHIO           MI   2.50 INCH DIAMETER HAIL
04/12/96   MONROE                         REPORTED BY NWSFO CLE

Special weather statement, Apr 12, 5:59 PM EDT, 2 hours 59 minutes before

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Local storm report, Apr 12, 6:17 PM EDT, 2 hours 41 minutes before

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Special weather statement, Apr 12, 6:55 PM EDT, 2 hours 3 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 Detroit, MI issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Apr 13, 1:16 AM EDT	Severe Thunderstorm Warning	DTX	Bay	29 min

Nearby

Severe Thunderstorm Warnings in Michigan, 1996 Every severe thunderstorm warning in 1996

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.