Alert archive / Nebraska / Severe Thunderstorm Warnings in 2000

Severe Thunderstorm Warning 106, NWS Omaha, NE

June 20, 2000Cass County, Otoe County, Nebraska

NWS Omaha, NE issued this severe thunderstorm warning at Jun 20, 2000, 12:47 AM CDT for Cass County, Otoe County, Nebraska. It was in force for 43 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: Jun 20, 2000, 12:47 AM CDT (05:47 UTC)
Expired: Jun 20, 2000, 1:30 AM CDT
In force: 43 min
Issued by: NWS Omaha, NE
Area: Whole counties; the outline is the Mesonet’s reconstruction

Counties Cass County, NE, Otoe County, NE

The watch it was issued in

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

Issued	Product	Office	Lasted
Jun 20, 12:30 AM CDT	Severe Thunderstorm Watch	SPC	6 hr

The nearest sounding before it

Omaha, NE (KOAX), launched 00:00Z, 5.8 hours before the alert went out and 63 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: 468 J/kg
Mixed-layer CIN: -52 J/kg
Mixed-layer LCL: 988 m above ground
0-6 km bulk shear: 29 kt
0-1 km storm-relative helicity: 90 m²/s²
0-3 km storm-relative helicity: 141 m²/s²
Significant tornado parameter: 0.2
Supercell composite: 2.1

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 Omaha, NE wrote its last area forecast discussion before this severe thunderstorm warning went out at Jun 19, 2:55 PM CDT, 9 hours 52 minutes earlier.

Area forecast discussion, Jun 19, 2:55 PM CDT, 9 hours 52 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE OMAHA/VALLEY NE
255 PM CDT MON JUN 19 2000

A MOIST AND UNSTABLE AIR MASS NOW IN PLACE ACROSS REGION PROVIDING
INGREDIENTS FOR TSTMS. APPEARS TO BE TWO SEPERATE DISTURBANCES IN
UPPER FLOW WILL PROVIDE UVV TO INITIATE AND SUSTAIN TSTMS TNGT INTO
TUE. FIRST EXTENDING FROM NE WY INTO ERN CO EJECTING OUT OF MAJOR
UPPER TROF ACROSS NRN RCKYS. THIS FEATURE WILL LIKELY AID IN
GENERATION OF TSTMS ALONG SFC TROF/DRY LINE WITHIN NEXT FEW HOURS.
TSTMS WILL LIKELY CONTINUE EAST THROUGH THE NIGHT INTO TUE INTO
EASTERN NEB AND WRN IA AS SFC TROF AND COLD FRONT MOVES EAST AND
INTERACTS WITH MOIST AND UNSTABLE AIR MASS PUMPED BY LOW LEVEL JET.
FEW OF THESE STORMS TNGT COULD BE SEVERE PER DAY 1 OUTLOOK.  SECOND
DISTURBANCE EXTENDS FROM WRN KS INTO TX PNHDL LIFTING NEWD. THIS
FEATURE INTERACTING WITH A MORE SUBTROPICAL TYPE AIR MASS WITH
EXTENSIVE MID AND LOW LEVEL MOISTURE GENERATING SHOWERS AND EMBEDDED
TSTMS ACROSS ERN KS AND WRN MO WHICH MAY WORK INTO PTNS SE NEB ANND
SW IA TNGT.

ON TUE CDFNT JUST CLEAR NERN NEB DURING MRNG HOURS. THESE REGION MAY
SEE SOME SHOWERS LINGER INTO AFTN BUT GENERALLY TREND TO A DRIER AND
MORE STABLE AIR MASS DURING DAY. REST OF AREA IN VICINITY AND AHEAD
OF FNT STILL APPEAR TO HAVE GOOD POTENTIAL FOR SHWRS AND TSTMS TUE
AS MAJOR UPPER TROF MOVES INTO AREA PROVIDING UVV ALONG WITH COOLING
MID LEVEL TEMPS. BASED ON CAPE...AND TOTAL TOTALS AREA FROM SW IA
INTO SE NEB MAY HAVE SEVERE RISK. SHOWERS AND THUNDERSTORMS TO END
THIS AREA DURING EVE AS FRONT AND UPPER FORICING MOVE AWAY.. ATTM
BASED ON LAPSE RATES AND STABILITY INDICES RISK OF INSTABILITY
SHOWE`RS WED WITH AFTN INSOLATION APPEARS SMALL.

.OMA...NONE.
WIESE

In the hours before

Local storm report, Jun 19, 10:32 PM CDT, 2 hours 15 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>

Local storm report, Jun 20, 12:25 AM CDT, 22 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>

The office that day

Everything else NWS Omaha, NE issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jun 19, 7:28 PM CDT	Severe Thunderstorm Warning	OAX	Antelope, Boone	62 min
Jun 19, 8:06 PM CDT	Severe Thunderstorm Warning	OAX	Madison, Platte	54 min
Jun 19, 8:06 PM CDT	Severe Thunderstorm Warning	OAX	Pierce	54 min
Jun 19, 8:34 PM CDT	Tornado Warning	OAX	Madison, Platte	26 min
Jun 19, 8:55 PM CDT	Severe Thunderstorm Warning	OAX	Madison, Pierce, Platte, Stanton, Wayne	50 min
Jun 19, 8:57 PM CDT	Severe Thunderstorm Warning	OAX	Boone	63 min
Jun 19, 9:04 PM CDT	Tornado Warning	OAX	Boone	26 min
Jun 19, 9:21 PM CDT	Severe Thunderstorm Warning	OAX	Wayne	39 min
Jun 19, 9:29 PM CDT	Severe Thunderstorm Warning	OAX	Boone, Platte	46 min
Jun 19, 10:17 PM CDT	Severe Thunderstorm Warning	OAX	Colfax, Platte, Stanton	43 min
Jun 19, 11:59 PM CDT	Severe Thunderstorm Warning	OAX	Gage, Lancaster, Saline, Seward	46 min
Jun 20, 2:11 AM CDT	Severe Thunderstorm Warning	OAX	Richardson	34 min

Nearby

Severe Thunderstorm Warnings in Nebraska, 2000 Every severe thunderstorm warning in 2000

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.