Alert archive / Nebraska / Severe Thunderstorm Warnings in 2002

Severe Thunderstorm Warning 120, NWS Omaha, NE

June 4, 2002Burt County, Thurston County, Nebraska

NWS Omaha, NE issued this severe thunderstorm warning at Jun 4, 2002, 4:02 AM CDT for Burt County, Thurston County, Nebraska. It was in force for 28 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: Jun 4, 2002, 4:02 AM CDT (09:02 UTC)
Expired: Jun 4, 2002, 4:30 AM CDT
In force: 28 min
Issued by: NWS Omaha, NE
Area: Counties, with a storm outline in the text

Counties Burt County, NE, Thurston County, NE

The radar

The Omaha radar (KOAX), 76 km from the middle of the area, began a volume at 09:05 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
Jun 4, 4:06 AM CDT	Hail 0.88	Lyons, 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 nearest sounding before it

Omaha, NE (KOAX), launched 00:00Z, 9.0 hours before the alert went out and 76 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: 227 J/kg
Mixed-layer CIN: -585 J/kg
Mixed-layer LCL: 889 m above ground
0-6 km bulk shear: 37 kt
0-1 km storm-relative helicity: 131 m²/s²
0-3 km storm-relative helicity: 282 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.5

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 4, 3:45 AM CDT, 17 minutes earlier.

Area forecast discussion, Jun 4, 3:45 AM CDT, 17 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE OMAHA/VALLEY NE
345 AM CDT TUE JUN 4 2002

FORECAST CHALLENGES...SHORT TERM TSRA/SHRA...THEN TEMPS.

SYNOPSIS...LATEST SURFACE ANALYSIS HAD THE SFC FNT N OF FNB AND S OF
CNK.  -TSRA/-SHRA BLOSSOMED AFT 0230Z...WITH A MULTI CELL LINE FM
CERESCO NE THRU VALLEY...MISSOURI VALLEY...WOODBINE...AND EARLING
IA.  THESE ECHOES QUICKLY MOVED INTO IA AS ANOTHER BATCH OF STORMS
MOVED INTO THE FORECAST AREA FM CNTRL NEB.  IR STLT/88-D RADAR
DEPICTED WHERE THE CONVECTIVE COMPLEXES WERE...ASSOCIATED WITH SHORT
WAVE TROFS ROTATING AROUND THE RIDGE OF HIGH PRES OVER THE SE US AND
MID LEVEL FRONTOGENESIS.  06Z SFC TEMPS OF ETA NOT PICKING UP ON THE
GRADIENT IN TEMPS.  FCST WAS TO RANGE FM UPR50S TO LOWER 70S AND 06Z
METARS HAD MID 50S TO UPR 70S ACRS CWFA.

FORECAST...SHORT RANGE MODELS ARE SIMILAR BRINGING THROUGH A MINOR
SHORT WAVE TROF EARLY THIS MORNING AND THEN THE STRONGER NORTHERN
PLAINS SHORT WAVE TROF THIS AFTERNOON AND TONIGHT.  THE SOUTHERN
PORTION OF THE TROF GETS SHEARED OFF AND RETROGRADES SWWARD TO THE
CA BAJA COAST.  AT THE SFC...HIGH PRESSURE WILL BUILD IN AND RMN OVR
THE FCST AREA THRU WED NIGHT.  AS THIS AREA MOVES OFF TO THE
EAST...RETURN FLOW WILL SET UP WITH WARMING TEMPS.

UPWARD VERTICAL MOTION/SUPPORT FM RIGHT ENTRANCE REGION OF THE JET
EXPECTED TO BE MAXIMIZED THIS MORNING AND DRIER CONDITIONS MOVING IN
TONIGHT.  HIGH TEMPS TODAY A BIT COOLER...GENERALLY UPR 60S TO MID
70S AND LOWS TONIGHT IN THE 50S.  THESE READINGS AOA GUIDANCE
NUMBERS.  WITH FEWER CLOUDS AROUND WED TEMPERATURES EXPECTED TO BE
SOME 10 DEG WARMER AND WARMER STIL FOR THU AS THE MID LEVEL RIDGE
BUILDS IN.

EXTENDED...FRI AND BEYOND...RIDGING REMAINS IN THE AREA FRI AND WITH
THE APPROACH OF A STG CLOSED LOW BEGINS TO BREAK DOWN FRI NIGHT.
SAT NIGHT THRU MON APPEAR STORMY AS THE CLOSED LO TRACKS ACRS THE
NRN PLNS.  AFTER SOME COOLER DAYS TO START THE WEEK...TEMPERATURES
SHOULD WARM BACK INTO THE 80S THU-SAT. NEW EXT OF THE AVN MORE
PROGRESSIVE WITH THE CLOSED LO.

IF YOU HAVE COMMENTS ON THE NEW FORECAST DISCUSSION FORMAT...PLEASE
E-MAIL THEM TO W-OAX.WEBMASTER@NOAA.GOV OR CALL DAVE THEOPHILUS AT
402-359-5166.

.OMA...NONE.

ZAPOTOCNY

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 4, 3:33 AM CDT	Severe Thunderstorm Warning	OAX	Cuming	27 min
Jun 4, 4:15 AM CDT	Severe Thunderstorm Warning	OAX	Monona	60 min

Nearby

Severe Thunderstorm Warnings in Nebraska, 2002 Every severe thunderstorm warning in 2002

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.