Alert archive / Nebraska / Tornado Warnings in 1999

Tornado Warning 46, NWS Hastings, NE

August 10, 1999Harlan County, Nebraska; Phillips County, Kansas

NWS Hastings, NE issued this tornado warning at Aug 10, 1999, 8:37 PM CDT for Harlan County, Nebraska; Phillips County, Kansas. It was in force for 38 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
Aug 10, 1999, 8:37 PM CDT (01:37 UTC)
Expired
Aug 10, 1999, 9:15 PM CDT
In force
38 min
Issued by
NWS Hastings, NE
Area
Whole counties

Counties Phillips County, KS, Harlan County, NE

The radar

The Grand Island radar (KUEX), 88 km from the middle of the area, began a volume at 01:39 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

N. Platte/Lee Bi, NE (KLBF), launched 00:00Z, 1.6 hours before the alert went out and 164 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-pSkew-T log-p diagram, N. Platte/Lee Bi, NE at 00:00Z on 1999-08-11Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1568 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, N. Platte/Lee Bi, NE at 00:00Z on 1999-08-11The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 62 square meters per square second.1939Sfc1 km3 km6 km9 kmRMLM
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

As transmitted, in the capitals the NWS used until 2016.

000 
TTAA00 KGRI 110136 RRA
TORGRI
KSC147-NEC083-110215-

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE HASTINGS NE
837 PM CDT TUE AUG 10 1999

THE NATIONAL WEATHER SERVICE IN HASTINGS HAS ISSUED A

* TORNADO WARNING FOR PEOPLE IN...
  NORTHWESTERN PHILLIPS COUNTY IN NORTH CENTRAL KANSAS
  SOUTHWESTERN HARLAN COUNTY IN SOUTH CENTRAL NEBRASKA

* UNTIL 915 PM CDT

* AT 833 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  DEVELOPING TORNADO 19 MILES NORTHWEST OF PHILLIPSBURG...OR 2 MILES
  NORTHWEST OF LONG ISLAND...MOVING NORTH AT 10 MPH.

THIS STORM IS EXPECTED TO REMAIN OVER RURAL AREAS NORTH OF LONG 
ISLAND.

PEOPLE IN NORTHWESTERN PHILLIPS AND SOUTHWESTERN HARLAN COUNTIES
SHOULD TAKE SHELTER IMMEDIATELY IN A BASEMENT OR SMALL INTERIOR ROOM
ON THE LOWEST FLOOR.

IF YOU ARE CAUGHT OUTSIDE...SEEK SHELTER IN A NEARBY BUILDING. AS A
LAST RESORT...SEEK SHELTER IN A DITCH OR LOW SPOT AND COVER YOUR HEAD
WITH YOUR HANDS.
N
$$

What forecasters said that day

The local office's own words before this tornado 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 tornado warning went out at Aug 10, 2:46 PM CDT, 5 hours 51 minutes earlier.

Area forecast discussion, Aug 10, 2:46 PM CDT, 5 hours 51 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

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 10, 11:27 PM CDTSevere Thunderstorm WarningGIDDawson, Gosper63 min
Aug 11, 12:14 AM CDTSevere Thunderstorm WarningGIDBuffalo, Phelps61 min
Aug 11, 12:32 AM CDTSevere Thunderstorm WarningGIDDawson43 min
Aug 11, 1:55 AM CDTSevere Thunderstorm WarningGIDFurnas50 min
Aug 11, 5:34 PM CDTSevere Thunderstorm WarningGIDFurnas, Harlan41 min
Aug 11, 4:31 AM CDTSevere Thunderstorm WarningGIDJewell44 min

Nearby

Tornado Warnings in Nebraska, 1999Tornado Warnings in Kansas, 1999Every tornado warning in 1999Tornadoes 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.