Alert archive / Nebraska / Severe Thunderstorm Warnings in 2001

Severe Thunderstorm Warning 231, NWS Omaha, NE

June 4, 2001Cass County, Nebraska

NWS Omaha, NE issued this severe thunderstorm warning at Jun 4, 2001, 12:52 AM CDT for Cass County, Nebraska. It was in force for 38 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, 2001, 12:52 AM CDT (05:52 UTC)
Expired: Jun 4, 2001, 1:30 AM CDT
In force: 38 min
Issued by: NWS Omaha, NE
Area: Whole counties; the outline is the Mesonet’s reconstruction

County Cass County, NE

The radar

The Omaha radar (KOAX), 49 km from the middle of the area, began a volume at 05:53 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, 1:00 AM CDT	Hail 1	Murray, NE	Hail covered the ground.

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

Topeka, KS (KTOP), launched 00:00Z, 5.9 hours before the alert went out and 217 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 659 m above ground
0-6 km bulk shear: 51 kt
0-1 km storm-relative helicity: 377 m²/s²
0-3 km storm-relative helicity: 603 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 7.2

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 Omaha, NE wrote its last area forecast discussion before this severe thunderstorm warning went out at Jun 3, 2:20 PM CDT, 10 hours 32 minutes earlier.

Area forecast discussion, Jun 3, 2:20 PM CDT, 10 hours 32 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE OMAHA NE
220 PM CDT SUN JUN 3 2001

RAIN AND THUNDERSTORMS CONTINUE TO BE MAJOR CONCERNS WITH
TEMPERATURES SECONDARY.

FNTL BNDRY ACROSS FM SE CO ACROSS NRN OK INTO NW AR HAS BEEN
SUPPRESSED SOME BY OUTFLOW FROM CONVECTIVE COMPLEX THAT MOVES ACROSS
CENTRAL PLAINS LAST NIGHT NOW OVER MISSOURI. BELIEVE BOUNDARY WILL
START TO MOVE SLOWLY NWD TNGT INTO MONDAY WITH GOOD POTENTIAL FOR
THUNDERSTORMS VICINITY AND N OF FNT AS STRENGTHENING LOW LEVEL JET
INCREASES STRONG POSITIVE LOW LEVEL THETA E ADVECTION DURING NIGHT.
PREFER ETA IN HANDLING LOCATION OF THIS BOUNDARY. ATHOUGH BETTER
LIKLIHOOD FOR THUNDERSTORMS AND POTENTIAL HEAVY RAIN WILL BE OVER KS
AND MO...REFERENCE QPFERD WHICH LOOKS REASONABLE...DEFINITE RISK FOR
ELEVATED CONVECTION LATER TONIGHT OVER ESPECIALLY SRN PTNS OF FCST
AREA. THIS POTENTIAL ALSO TRENDED BY LATEST RUC 700MB LI PROGS. IN
ADDITION ACTIVITY NOW FIRING WESTERN HIGH PLAINS ASSOCIATED WITH
DISTURBANCES COMING OUT OF WESTERN MID LEVEL TROUGH WILL LIKELY WORK
EAST DURING NIGHT BASED ON MODELS AS MESO ETA.

CONVECTIVE ACTIVITY MAY SHOW SOMEWHAT SIMILAR DIURNAL DECREASE IN
COVERAGE AND INTENSITY ON MON WITH SCENARIO LIKELY TO REPEAT ITSELF
AGAIN MONDAY NIGHT INTO TUE. THERE COULD WELL BE BETTER RISK OF
HEAVY RAIN INTO FORECAST AREA MON NIGHT AS STRONG POSITIVE LOWER
LEVEL THETA E ADVECTION AGAIN DEVELOPES WITH STRENGTHENING LOW LEVEL
JET WITH THE CLOSER PROXIMITY OF FNT AND MOIST HIGH PW UNSTABLE AIR
MASS. UPPER LEVEL DISTURBANCES WILL ALSO CONTINUE TO MOVE OUT OF MID
LEVEL TROUGH AS IT LIFTS ACROSS MT.

APPEARS MAIN POTENTIAL FOR THUNDERSTORMS ON TUESDAY INTO TUESDAY
NIGHT WILL BE FOCUSED IN VICINITY OF FRONTAL BOUNDAY MAINLY OVER SE
NEB AND SW IA. TAKING MORE OF AN AVERAGE BEWTEEN FWC AND MAV
GUIDNACE FOR MAX TEMPS SEEMS BEST COURSE OF ACTION WITH FWC NUMBER
LIKELY TOO WARM WITH ELY FLOW AND INVERSION N OF FNT.

WITH UPPER RIDGE TENDING TO BUILD OUT OF SRN ROCKIES INTO CNTRL
PLAINS EXTENDED TRENDS TOWARD MAINLY DRY WITH WARMING TEMPS INTO
WEEKEND. HOWEVER HAVE TO BE WATCHFULL FOR UPPER DISTUBANCES COMING
OVER RIDGE AND THEN MOVING SEWD ACROSS PLAINS GNERATING CONVECTION.
BETTER CHANCE AT THIS TIME APPEARS MORE IN SUNDAY TIME PERIOD.

.OMA...NONE.
WIESE

In the hours before

Special weather statement, Jun 3, 8:55 PM CDT, 3 hours 57 minutes before

IAZ043-055-056-069-079-080-090-091-NEZ011-012-015>018-030>034-
042>045-050>053-065>068-078-088>093-040900-

HAZARDOUS WEATHER OUTLOOK...UPDATED
NATIONAL WEATHER SERVICE OMAHA/VALLEY NE
855 PM CDT SUN JUN 3 2001

STORM SPOTTER ACTIVATION COULD BE NEEDED OVER SOUTHEAST NEBRASKA
TONIGHT.

WARM AND MOIST AIR MOVING INTO SOUTHEAST NEBRASKA OVER COOLER AIR AT
THE SURFACE WILL ALLOW FOR SCATTERED ELEVATED STRONG TO SEVERE
THUNDERSTORMS TONIGHT.  THE PRIMARY THREAT IS LARGE HAIL BUT HEAVY
RAIN IS ALSO POSSIBLE.   A SEVERE THUNDERSTORM WATCH IS IN EFFECT
FOR SOUTHEAST NEBRASKA SOUTH OF LINCOLN UNTIL 200 AM.

THESE STORMS WILL MOVE INTO EAST CENTRAL NEBRASKA AND SOUTHWEST
IOWA...BUT THEY COULD WEAKEN A LITTLE.  NEVERTHELESS...SOME HAIL AND
HEAVY RAIN IS POSSIBLE NORTH OF THE WATCH AREA TONIGHT.

CHERMOK

Local storm report, Jun 3, 9:26 PM CDT, 3 hours 26 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE OMAHA/VALLEY NE
926 PM CDT SUN JUN 03 2001

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

0910 PM    5 NE PICKRELL             NE   .75 INCH HAIL
06/03/01   GAGE                           REPORTED BY PUBLIC.

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 3, 8:59 PM CDT	Severe Thunderstorm Warning	OAX	Gage	31 min
Jun 3, 10:35 PM CDT	Severe Thunderstorm Warning	OAX	Johnson, Nemaha	40 min

Nearby

Severe Thunderstorm Warnings in Nebraska, 2001 Every severe thunderstorm warning in 2001

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.