Alert archive / Nebraska / Severe Thunderstorm Warnings in 2008

Severe Thunderstorm Warning 290, NWS Omaha, NE

June 24, 20084 counties in Nebraska

NWS Omaha, NE issued this severe thunderstorm warning at Jun 24, 2008, 5:30 AM CDT for 4 counties in Nebraska. It was in force for 45 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 24, 2008, 5:30 AM CDT (10:30 UTC)
Expired: Jun 24, 2008, 6:15 AM CDT
In force: 45 min
Issued by: NWS Omaha, NE
Area: Storm-based polygon

Counties Gage County, NE, Johnson County, NE, Lancaster County, NE, Otoe County, NE

The nearest sounding before it

N. Platte/Lee Bi, NE (KLBF), launched 00:00Z, 10.5 hours before the alert went out and 356 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: 1839 J/kg
Mixed-layer CIN: -110 J/kg
Mixed-layer LCL: 1349 m above ground
0-6 km bulk shear: 38 kt
0-1 km storm-relative helicity: 53 m²/s²
0-3 km storm-relative helicity: 200 m²/s²
Significant tornado parameter: 0.5
Supercell composite: 9.9

Open this sounding in Storm Lab

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 24, 2:54 AM CDT, 2 hours 36 minutes earlier.

Area forecast discussion, Jun 24, 2:54 AM CDT, 2 hours 36 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE OMAHA/VALLEY NE
254 AM CDT TUE JUN 24 2008

.DISCUSSION...

CONVECTION CURRENTLY ONGOING ACROSS SOUTH CENTRAL AND SOUTHEAST
NEBRASKA AS NOSE OF LOW LEVEL JET CONTINUES TO STRENGTHEN AND VEER.
SFC PATTERN COMPLEX WITH ONGOING CONVECTION...HOWEVER WMFNT DOES
APPEAR DRAPED ACROSS NORTH CENTRAL KANSAS INTO FAR NERN KS. RESIDUAL
BOUNDARIES AND POSSIBLE REMNANT MCV WL COMPLICATE FORECAST OVR
NEXT 24 HOURS.

DEVELOPING MCS ACROSS SOUTH CENTRAL NEBRASKA IS EXPECTED TO EXPAND
EWD THROUGHOUT THE MORNING HOURS ALONG NOSE OF STRENGTHENING AND
VEERING LLVL JET. STORMS ARE LIKELY ACROSS AT LEAST THE SOUTHERN
HALF OF THE CWA THROUGHOUT THE MORNING HOURS WHERE STRONGEST
ISENTROPIC ASCENT IS ONGOING. HAIL/WIND TREAT POSSIBLE THROUGHOUT
THE MORNING HOURS. THIS AREA IS IN AXIS OF DEEP LAYER MOISTURE
FLUX CONVERGENCE SO BESIDES A HAIL/WIND THREAT...HEAVY DOWNPOURS
ARE ALSO QUITE LIKELY. FAIRBURY HAD ALREADY RECEIVED JUST SHY OF
AN INCH BY 2 AM WHERE PWS ARE NEAR 1.50.

SFC WMFNT WL REMAIN DRAPED ACROSS NRN KS AND NRN MO THRU MUCH OF
THE DAY AND WL LIKELY BE THE FOCUS FOR REDEVELOPMENT LATER IN THE
DAY/EVENING. AS MENTIONED PREVIOUSLY...DIFFICULT TO DETERMINE IF
CONVECTION WL COMPLETLY DIMINISH ACROSS SERN NEB/SWRN IA TODAY DUE
TO RESIDUAL BOUNDARIES AND POTENTIAL MCV. SWRLY LLVL JET
STRENGTHENS THIS EVENING AND SHOULD SERVE AS ONE OF THE MAIN FORCING
MECHANISMS ACROSS SERN NEB/SWRN IA FOR TSTMS OVERNIGHT.

WEDNESDAY DAYTIME LOOKS RELATIVELY DRY AND HOT AHEAD OF WEAK FRONT
MOVING OUT OF THE NRN PLAINS. CONVECTION FORECAST TO FIRE ALONG
THIS FRONT AS IT MOVES SLOWLY SOUTH ACROSS THE CWA WED EVENING.
NOCTURNAL TSTMS MAY CONTINUE INTO EARLY THURSDAY MORNING HOURS.
WITH RESIDUAL BOUNDARIES IN THE AREA...THUNDERSTORM CHANCES
CONTINUE THURSDAY INTO FRIDAY.

LEFT REMAINDER OF FORECAST MOSTLY AS IS WITH STRONGER CDFNT
MOVING INTO THE AREA FRIDAY NIGHT AS DEEP UPPER TROF DIGS ACROSS
THE NRN PLAINS. DID LOWER TEMPS A FEW DEGREES OVER THE WEEKEND
BEHIND THE COLD FRONT.

&&

.AVIATION...
FOR TAF SITES KOMA...KLNK AND KOFK...THROUGH 25/12Z.

THUNDERSTORM CHANCES REMAIN IN THE FORECAST THROUGH ABOUT 14Z...THEN
JUST MENTIONED SHOWERS WITH A CB CLOUD GROUP THROUGH ABOUT 17Z AS
CONVECTION LIKELY GOES THROUGH A TYPICAL DIURNAL CYCLE. MORE STORMS
MAY REDEVELOP FROM LATE AFTERNOON THROUGH THE EVENING...BUT DUE TO
UNCERTAINTIES REGARDING COVERAGE AND TIMING...ONLY MENTIONED A
PROB30 GROUP FOR NOW FROM ABOUT 21Z-03Z. OTHERWISE...MOSTLY VFR
CONDITIONS EXPECTED THROUGH THE PERIOD...BUT COULD BRIEFLY SEE MVFR
CIGS DURING HEAVIEST INTENSITY OF DOWNPOURS THIS MORNING.

&&

.OAX WATCHES/WARNINGS/ADVISORIES...
NE...NONE.
IA...NONE.
&&

GRIFFIS/DEWALD

Hazardous weather outlook, Jun 24, 5:16 AM CDT, 14 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>

In the hours before

Local storm report, Jun 24, 4:54 AM CDT, 36 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 24, 5:28 AM CDT, 2 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 24, 4:10 AM CDT	Severe Thunderstorm Warning	OAX	Lancaster, Saline, Seward	50 min
Jun 24, 4:36 AM CDT	Severe Thunderstorm Warning	OAX	Lancaster	39 min
Jun 24, 5:00 AM CDT	Severe Thunderstorm Warning	OAX	Gage, Lancaster, Saline	30 min
Jun 24, 8:14 AM CDT	Areal Flood Advisory	OAX	Seward	6 hr
Jun 24, 1:26 PM CDT	Areal Flood Advisory	OAX	Douglas	2 hr
Jun 24, 1:43 PM CDT	Flash Flood Warning	OAX	Saunders	93 min
Jun 24, 2:31 PM CDT	Severe Thunderstorm Warning	OAX	Jefferson	29 min
Jun 24, 2:59 PM CDT	Severe Thunderstorm Warning	OAX	Gage, Jefferson	31 min
Jun 24, 3:59 PM CDT	Severe Thunderstorm Warning	OAX	Otoe	36 min

Nearby

Severe Thunderstorm Warnings in Nebraska, 2008 Every severe thunderstorm warning in 2008

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.