Alert archive / Nebraska / Tornado Warnings in 1999

Tornado Warning 42, NWS Hastings, NE

June 9, 1999Fillmore County, York County, Nebraska

NWS Hastings, NE issued this tornado warning at Jun 9, 1999, 9:30 PM CDT for Fillmore County, York County, Nebraska. It was in force for 30 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 9, 1999, 9:30 PM CDT (02:30 UTC)
Expired: Jun 9, 1999, 10:00 PM CDT
In force: 30 min
Issued by: NWS Hastings, NE
Area: Whole counties

Counties Fillmore County, NE, York County, NE

The nearest sounding before it

Omaha, NE (KOAX), launched 00:00Z, 2.5 hours before the alert went out and 124 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: 1592 J/kg
Mixed-layer CIN: -84 J/kg
Mixed-layer LCL: 1308 m above ground
0-6 km bulk shear: 24 kt
0-1 km storm-relative helicity: 107 m²/s²
0-3 km storm-relative helicity: 145 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 2.5

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 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 Jun 9, 2:10 PM CDT, 7 hours 20 minutes earlier.

Area forecast discussion, Jun 9, 2:10 PM CDT, 7 hours 20 minutes before

SOUTH CENTRAL NEBRASKA/NORTH CENTRAL KANSAS FORECAST DISCUSSION
NATIONAL WEATHER SERVICE HASTINGS NE
210 PM CDT WED JUN 9 1999

...THREAT OF SEVERE WX FIRST ORDER OF CONCERN FOLLOWED BY HEAVY
RAIN TONIGHT AND THURSDAY NIGHT...

MID LEVEL CLOUDINESS FROM LAST NIGHTS CONVECTIVE COMPLEX OVER SC KS
SLOW TO EXIT EASTERN FA.  BANDS OF CU AND MID LEVEL CLOUDS HOWEVER
ARE INCREASING ACROSS CENT NEBR INTO NW KS VIA VIS SAT. THIS MAY
PREVENT TEMPS FROM REACHING CONVECTIVE THRESHOLDS...BUT MORE
IMPORTANT IS THE INABILITY OF SFC DWPTS TO REBOUND. 18Z SFC ANALYSIS
SHOWS DWPTS IN THE LOWER 60S ACROSS FA WHILE EASTERN NEBR AND KS ARE
WELL INTO THE 60S TO LOWER 70S. 15Z RUC SHOWS LLVL MOISTURE
INCREASING WITH 65 DEWPTS FCST ACROSS EASTERN 2/3 CWA BY MID AFTN
WHICH MAY BE PUSHING IT. 18Z SFC ANALYSIS AND KLNX 88-D DEPICT COLD
FRONT FROM JUST EAST OF KANW TO NEAR KLBF.

STILL UNSURE WERE INITIAL CONVECTION WILL DEVELOP...BUT AM LEANING
EAST OF FA AREA ATTM. EXPECT SOME REFL RETURNS ON RADAR NEAR EASTERN
FA BY ZONE ISSUANCE AND WILL WAIT TIL LAST MINUTE FOR UPDATES/WATCH
HEADLINES THAT MAY BE NEEDED BEFORE FINAL PRODUCT IS SENT. SFC
BASED CAPES SHOULD APPROACH 2500-3000 J/KG LATE THIS AFTN ACRS
EASTERN CWA...BUT WEAK SPEED SHEAR COULD SUSPEND LIQUID WATER IN
UPDRAFT AND ADD ADDITIONAL LATENT HEAT UPON FREEZING THUS INCREASING
CAPE EVEN FURTHER. VERY TO EXTREMELY UNSTABLE ATMOS IS PROGGED WITH
LIFTED FCST BETWEEN -8 TO -11. BRN AND BRN SHEAR VALUES SUGGEST A
COMBINATION OF SUPERCELL AND MULTICELL DEVELOPMENT. MORE LIKELY
SUPERCELL...LARGE HAIL AND ISOLATED TORNADOES...EARLY WITH A
TRANSITION TO MULTICELL...THEN A CONVECTIVE COMPLEX SETTING UP
OVERNIGHT. DIFFLUENT THKNS PATTERN EAST OF FA AND STRONG UPPER AIR
DIVERGENCE SHOULD SUPPORT ONGOING TRAINING CELLS TONIGHT LEADING TO
LOCAL HEAVY RAINS AND URBAN FLOODING.

CLOUDS AND WET CONDITIONS ON THURSDAY SHOULD SUPPRESS MOST STORMS
FROM BECOMING SEVERE...BUT A FEW SHOULD BE POSSIBLE ACROSS
SOUTHEASTERN CWA NEAR FRONT. WILL RIDE CATEGORICAL POPS TONIGHT AND
THURSDAY NIGHT IN FCST...WITH MENTION OF A FEW POSSIBLY SEVERE
TONIGHT. THURSDAY DAY POPS 40-50%. AVN HANGS UP FRONT ON FRIDAY...
ALTHOUGH IT COULD BE A TAD FAR NORTH...BUT WILL KEEP CHANCE OF
SHOWERS/THUNDERSTORMS IN FCST FOR FRIDAY AS WELL. WILL NOT STRAY TOO
FAR FROM GUID EXCEPT TO TACK ON A DEGREE OR TWO TO OVERNIGHT LOWS DUE
TO THICK CLOUD CANOPY.

IN THE EXTENDED...THE UKMET/MRF/NOGAPS ALL AGREE IN BREAKING DOWN
EASTERN U.S. RIDGE WITH INFLUENCE OF NORTHERN PLAINS WAVE. A
TRANSITION TO A WESTERN RIDGE PATTERN AND NORTHWEST FLOW OVER CENTRAL
PLAINS LOOK LIKELY ATTM. WILL GO DRY SAT/SUN/MON WITH LOWS IN THE 60S
AND HIGHS IN THE 80S.

.GID...NONE

PURDY

In the hours before

Local storm report, Jun 9, 7:23 PM CDT, 2 hours 7 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE  HASTINGS NE
723 PM CDT WED JUN 9 1999

TIME(CDT)  .....CITY LOCATION.....STATE   ...EVENT/REMARKS...
           ....COUNTY LOCATION....

0714 PM    BRADSHAW                  NE   1.00 INCH HAIL
06/09/99   YORK

LEW

Local storm report, Jun 9, 7:23 PM CDT, 2 hours 7 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE  HASTINGS NE
723 PM CDT WED JUN 9 1999

TIME(CDT)  .....CITY LOCATION.....STATE   ...EVENT/REMARKS...
           ....COUNTY LOCATION....

0714 PM    BRADSHAW                  NE   1.00 INCH HAIL
06/09/99   YORK

LEW

Local storm report, Jun 9, 8:18 PM CDT, 1 hour 12 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE  HASTINGS NE
818 PM CDT WED JUN 9 1999

TIME(CDT)  .....CITY LOCATION.....STATE   ...EVENT/REMARKS...
           ....COUNTY LOCATION....

0813 PM    YORK                      NE   1.75 INCH HAIL
06/09/99   YORK                           2W YORK I-80 INTERCHANGE

LEW

Local storm report, Jun 9, 8:18 PM CDT, 1 hour 12 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE  HASTINGS NE
818 PM CDT WED JUN 9 1999

TIME(CDT)  .....CITY LOCATION.....STATE   ...EVENT/REMARKS...
           ....COUNTY LOCATION....

0813 PM    YORK                      NE   1.75 INCH HAIL
06/09/99   YORK                           2W YORK I-80 INTERCHANGE

LEW

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 9, 7:00 PM CDT	Severe Thunderstorm Warning	GID	Hamilton	45 min
Jun 9, 7:14 PM CDT	Severe Thunderstorm Warning	GID	York	31 min
Jun 9, 7:41 PM CDT	Severe Thunderstorm Warning	GID	York	49 min
Jun 9, 8:27 PM CDT	Severe Thunderstorm Warning	GID	York	48 min
Jun 9, 9:05 PM CDT	Tornado Warning	GID	Fillmore, York	25 min
Jun 9, 9:58 PM CDT	Flash Flood Warning	GID	York	3 hr
Jun 9, 11:09 PM CDT	Flash Flood Warning	GID	Hamilton	2 hr
Jun 9, 11:35 PM CDT	Flash Flood Warning	GID	Rooks	3 hr
Jun 10, 1:49 AM CDT	Flash Flood Warning	GID	Rooks	2 hr

Nearby

Tornado Warnings in Nebraska, 1999 Every tornado warning in 1999 Tornadoes 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.