Alert archive / Nebraska / Severe Thunderstorm Warnings in 1999

Severe Thunderstorm Warning 178, NWS Hastings, NE

August 11, 1999Dawson County, Nebraska

NWS Hastings, NE issued this severe thunderstorm warning at Aug 11, 1999, 12:32 AM CDT for Dawson County, Nebraska. It was in force for 43 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: Aug 11, 1999, 12:32 AM CDT (05:32 UTC)
Expired: Aug 11, 1999, 1:15 AM CDT
In force: 43 min
Issued by: NWS Hastings, NE
Area: Whole counties

County Dawson County, NE

The radar

The Grand Island radar (KUEX), 131 km from the middle of the area, began a volume at 05:33 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
Aug 11, 12:35 AM CDT	Thunderstorm Wind 50	Overton, NE

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
Aug 10, 10:00 PM CDT	Severe Thunderstorm Watch	SPC	4 hr

The nearest sounding before it

N. Platte/Lee Bi, NE (KLBF), launched 00:00Z, 5.5 hours before the alert went out and 72 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: 1568 J/kg
Mixed-layer CIN: -57 J/kg
Mixed-layer LCL: 1522 m above ground
0-6 km bulk shear: 32 kt
0-1 km storm-relative helicity: 62 m²/s²
0-3 km storm-relative helicity: 110 m²/s²
Significant tornado parameter: 0.3
Supercell composite: 1.8

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 Hastings, NE wrote its last area forecast discussion before this severe thunderstorm warning went out at Aug 10, 2:46 PM CDT, 9 hours 46 minutes earlier.

Area forecast discussion, Aug 10, 2:46 PM CDT, 9 hours 46 minutes before

SOUTH CENTRAL NEBRASKA/NORTH CENTRAL KANSAS FORECAST DISCUSSION...
NATIONAL WEATHER SERVICE HASTINGS NE
246 PM CDT TUE AUG 10 1999

...CHANCE FOR PRECIP AND EFFECT ON WED TEMPS CONCERN THIS FCST...

TDA LOOKS TO BE THE LAST TRANQUIL DAY AS UPPER SYSTEM OFF CA COAST
FCST TO WEAKEN AND PUSH ENE. AHEAD OF IT SEVERAL SHORTWAVES TO
AFFECT OUR AREA WITH THE DIFFICULTY BEING THE TIMING AND LOCATION.
FIRST ONE ROTATING NNE THRU NM INTO CO THIS MORNING SHOULD IMPACT
US TONIGHT. ETA PRETTY ROBUST WITH THIS WAVE AS IT SLIDES THRU CWA
LATER TONIGHT INTO WED.  HIGHER OMEGA VALUES FURTHER SOUTH IN AREA
OF WARM ADVECTION WHICH SEEMS REASONABLE WITH LOW LEVEL JET SETTING
UP FROM WESTERN PART OF CWA LATER THIS EVENING AND KEEP IT MORE
OVER WEST UNTIL 12Z WED.  HPC NOTES POSSIBLE MCS SETTING UP OVER
WESTERN NEB TNGHT AND PUSHING EAST. SFC BNDRY TOUGH TO LOCATE IN
KS...AND PROBABLY BEST SEEN WITH DEVELOPING CU FIELD ON VIS IMAGE.

WHILE MODELS DIFFER QUITE A BIT ON AMOUNT OF PRECIP...ETA AND NGM
DUMP A LOT WHILE AVN MORE MODEST...THEY AGREE SOMEWHAT ON PUSHING
IT THROUGH CWA WEST TO EAST ON WED.  THIS TO HAVE BIG EFFECT ON
TEMPS AS LINGERING CLOUDS/SHOWERS COULD HOLD MERCURY DOWN. WILL GO
HIGHER IN WEST THAN EAST ON WED.  WILL ALSO KEEP TSTM CHC GOING
WED/WED NIGHT AS UPPER WINDS INCR AND EXPECT BNDRYS TO REMAIN FROM
OVERNIGHT.  THURS COULD ALSO BE INTERESTING WITH COLD FRONT PASSAGE
AND SHORTWV ENERGY MOVING ACROSS JUST TO THE NORTH.

THINGS LOOK TO DRY OUT FRI INTO THE WEEKEND. SFC FRONT COULD MOVE
IN ON SUNDAY AND KICK OFF TSTMS...BUT WILL KEEP DRY FOR NOW.

.GID...NONE.

EWALD

In the hours before

Local storm report, Aug 11, 12:02 AM CDT, 30 minutes before

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Local storm report, Aug 11, 12:04 AM CDT, 28 minutes before

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</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>
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        The site you requested is temporarily down for maintenance or an unexpected outage.
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        Please try again in a few minutes.
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The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 10, 8:37 PM CDT	Tornado Warning	GID	Harlan	38 min
Aug 10, 11:27 PM CDT	Severe Thunderstorm Warning	GID	Dawson, Gosper	63 min
Aug 11, 12:14 AM CDT	Severe Thunderstorm Warning	GID	Buffalo, Phelps	61 min
Aug 11, 1:55 AM CDT	Severe Thunderstorm Warning	GID	Furnas	50 min
Aug 11, 5:34 PM CDT	Severe Thunderstorm Warning	GID	Furnas, Harlan	41 min
Aug 11, 4:31 AM CDT	Severe Thunderstorm Warning	GID	Jewell	44 min

Nearby

Severe Thunderstorm Warnings in Nebraska, 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.