Severe Thunderstorm Warning 217, NWS Omaha, NE

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE OMAHA/VALLEY NE
405 PM CDT MON JUN 5 2006

.DISCUSSION...

CONVECTION COVERAGE/EVOLUTION THROUGH TONIGHT IS THE MAIN
CHALLENGE THIS FORECAST.  A SECONDARY CONCERN IS FRONTAL TIMING
NEXT SATURDAY AND BEYOND.

RAPID CONVECTIVE DEVELOPMENT IS CURRENTLY TAKING PLACE ALONG A COLD
FRONT AND LEAD TROF ERN SD THRU N CENTRAL TO SW NEBRASKA.  GOOD
HEATING HAS TAKEN PLACE FROM THIS AREA INTO NORTHEAST NEB.  SEVERE
WX POTENTIAL IS STRONGEST IN THIS AREA...MAINLY HAIL AND WINDS.
SHEAR APPEARS MARGINAL...THERE ARE NO STRONG OUTFLOW BOUNDARIES IN
THE AREA AT LEAST YET...AND LCLS ARE FAIRLY HIGH.

DAYTIME HEATING HAS BEEN SQUELCHED OVER E CENTRAL AND SE NEBRASKA
INTO SW IA BY A LEFTOVER MCS.  THIS HAS REDUCED AVAILABLE CAPE...AND
SEVERE POTENTIAL.  MOISTURE IS HIGH ENOUGH TO ALLOW WIDELY SCT TSTMS
ANYWAY.  EXPECT MORE WIDESPREAD DEVELOPMENT AS THE FRONT PLOWS ACROSS
THE AREA TONIGHT...ALONG WITH LOCALLY HEAVY RAIN.  AS SYSTEM IS
PROGRESSIVE...RAINFALL WILL PROBABLY NOT BE EXCESSIVE.

SOME REMNANTS OF CONVECTION MAY BE LEFT OVER IN THE SE TUESDAY
MORNING...BUT SHOULD NOT LAST LONG.  18Z NAM APPEARS A TRIFLE SLOWER
THAN 12Z RUN...BUT NOT ENOUGH FOR MUCH CONCERN YET.

SEVERAL DAYS OF WARM AND DRY WEATHER SHOULD FOLLOW...WITH THE
POSSIBLE EXCEPTION OF A RIDGE RUNNER WAVE WITH WARM ADVECTION PRECIP
THU NIGHT.  AIRMASS REMAINS WARM INTO THE WEEKEND UNDER THE
INFLUENCE OF A STRONG UPPER RIDGE OVER THE S AND CENTRAL ROCKIES.
BUMPED UP TEMPS A FEW DEGREES IN LINE WITH NEW GUID...BUT HELD BACK
A COUPLE OF DEGREES ON SAT HPC GUID FOR BETTER CONSENSUS WITH
SURROUNDING OFFICES.  IF TIMING IS CORRECT ON THE NEXT FRONT...
CONDITIONS WILL BE VERY WARM BY THEN AND TEMPS WILL NEED TO BE
BROUGHT UP MORE BOTH DAY AND NIGHT.

HPC AND MODELS ARE CONSISTENT FROM YESTERDAY IN BRINGING THE NEXT
FRONT THROUGH LATER SATURDAY INTO SUNDAY.  WHILE MODEL TIMING IS
ALWAYS SUSPECT SO FAR OUT...CONSISTENCY APPEAR GOOD ENOUGH TO STICK
TO PREVIOUS SCENARIO FOR THE WEEKEND.  MONDAY IS LESS CERTAIN.
UPPER FLOW GRADUALLY FLATTENS...AND THERE MAY BE A SECOND WAVE ALONG
THE FRONT LATER SUNDAY OR MONDAY.  PUT BETTER POPS IN FOR SUNDAY NGT
THAN MONDAY...BUT FAIRLY LOW NUMBERS OVERALL.  TEMPERATURES ARE AS
UNCERTAIN AS FRONTAL POSITIONS...BUT ELECTED TO TREAT SUNDAY AS A
POST FRONTAL DAY WITH SUBSTANTIALLY COOLER TEMPS THAN INDICATED BY
HPC GUIDANCE.ES AND THIS TOO WILL NEED MONITORING.

&&

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

POLLACK

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE OMAHA/VALLEY NE
516 PM CDT MON JUN 5 2006

IAZ043-055-056-069-079-080-090-091-NEZ011-012-015>018-030>034-
042>045-050>053-065>068-078-088>093-060500-
ANTELOPE-BOONE-BURT-BUTLER-CASS-CEDAR-COLFAX-CUMING-DODGE-DOUGLAS-
FREMONT IA-GAGE-HARRISON IA-JEFFERSON-JOHNSON-KNOX-LANCASTER-MADISON-
MILLS IA-MONONA IA-MONTGOMERY IA-NEMAHA-OTOE-PAGE IA-PAWNEE-PIERCE-
PLATTE-POTTAWATTAMIE IA-RICHARDSON-SALINE-SARPY-SAUNDERS-SEWARD-
SHELBY IA-STANTON-THURSTON-WASHINGTON-WAYNE-
516 PM CDT MON JUN 5 2006

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PARTS OF EASTERN NEBRASKA AND
SOUTHWEST IOWA.

.DAY ONE...THIS EVENING THROUGH TUESDAY

STRONG THUNDERSTORMS WILL CONTINUE ALONG AND AHEAD OF A COLD
FRONT THAT WILL PUSH ACROSS NORTHEAST NEBRASKA THIS EVENING...AND
ACROSS MOST OF EASTERN NEBRASKA AND SOUTHWEST IOWA TONIGHT.

THE MOST UNSTABLE AIR WILL BE LOCATED OVER NORTHEAST NEBRASKA UNTIL
DARK. SEVERE THUNDERSTORMS CONTAINING LARGE HAIL OR DAMAGING WINDS
ARE LIKELY TO MOVE ACROSS PORTIONS OF NORTHEAST NEBRASKA THIS
EVENING.  THERE IS ONLY A SLIGHT RISK OF TORNADO DEVELOPMENT.

THUNDERSTORMS SHOULD PERSIST AND MOVE SOUTHEAST ACROSS THE AREA
TONIGHT.  A GRADUAL DECREASE IN INTENSITY IS EXPECTED...BUT LARGE
HAIL AND DAMAGING WINDS WILL STILL BE POSSIBLE FROM THE LARGEST
STORMS.  HEAVY RAIN AND LOCALIZED FLOODING WILL ALSO BE POSSIBLE.

A FEW THUNDERSTORMS MAY LINGER INTO TUESDAY MORNING IN THE SOUTHEAST
CORNER OF NEBRASKA AND SOUTHWEST CORNER OF IOWA.  ANY STORMS THAT
REMAIN IN THIS AREA AFTER 7 AM ARE NOT EXPECTED TO BECOME SEVERE.

.DAYS TWO THROUGH SEVEN...TUESDAY NIGHT THROUGH MONDAY

MORE THUNDERSTORMS ARE POSSIBLE THURSDAY NIGHT ACROSS EASTERN
NEBRASKA...THEN AGAIN FROM SATURDAY NIGHT INTO MONDAY ACROSS THE
ENTIRE AREA AS A NEW COLD FRONT MOVES INTO THE REGION.

.SPOTTER INFORMATION STATEMENT...

STORM SPOTTER ACTIVATION WILL BE NEEDED THIS EVENING IN PORTIONS
OF NORTHEAST NEBRASKA.  SPOTTER ACTIVATION MAY BE REQUIRED AFTER
8 PM IN SOUTHEAST NEBRASKA AND SOUTHWEST IOWA.

POLLACK

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE OMAHA/VALLEY NEBRASKA
533 PM CDT MON JUN 05 2006

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0525 PM     HAIL             5 NE ROYAL              42.38N 98.06W
06/05/2006  E0.75 INCH       ANTELOPE           NE   PUBLIC

            ONLY A COUPLE OF STONES.

&&

DEWALD

<!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>

<!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>

<!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>

<!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>

<!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>