Alert archive / Nebraska / Severe Thunderstorm Warnings in 2002

Severe Thunderstorm Warning 375, NWS Omaha, NE

October 1, 2002Saunders County, Nebraska

NWS Omaha, NE issued this severe thunderstorm warning at Oct 1, 2002, 5:38 PM CDT for Saunders County, Nebraska. It was in force for 37 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Oct 1, 2002, 5:38 PM CDT (22:38 UTC)
Expired: Oct 1, 2002, 6:15 PM CDT
In force: 37 min
Issued by: NWS Omaha, NE
Area: Counties, with a storm outline in the text

County Saunders County, NE

The radar

The Omaha radar (KOAX), 24 km from the middle of the area, began a volume at 22:41 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.

Did it verify

Not verified. The Iowa Environmental Mesonet's Cow found no qualifying storm report inside this severe thunderstorm warning while it was in force. That is not proof nothing happened: reports are thin where few people live.

Cow counts a report within 15 km of the polygon while the warning was in force: a tornado for a tornado warning; hail of 1 inch or more, a gust of 58 mph or more or wind damage for a severe thunderstorm warning; a flash flood report for a flash flood warning.

The nearest sounding before it

Omaha, NE (KOAX), launched 12:00Z, 10.6 hours before the alert went out and 24 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: 976 J/kg
Mixed-layer CIN: -220 J/kg
Mixed-layer LCL: 1127 m above ground
0-6 km bulk shear: 43 kt
0-1 km storm-relative helicity: 43 m²/s²
0-3 km storm-relative helicity: 111 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.7

Open this sounding in Storm Lab

The text

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

617 
WUUS53 KOAX 012238
SVROMA
NEC155-012315-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE OMAHA NE
538 PM CDT TUE OCT 1 2002

THE NATIONAL WEATHER SERVICE IN OMAHA HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTHEAST SAUNDERS COUNTY IN EAST CENTRAL NEBRASKA

* UNTIL 615 PM CDT

* AT 536 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM 4 MILES SOUTHWEST OF MEMPHIS...OR ABOUT 20
  MILES NORTHEAST OF LINCOLN...MOVING NORTHEAST AT 40 MPH.

* SOME LOCATIONS AFFECTED...
  YUTAN AND MEAD

LARGE HAIL IS LIKELY WITH THIS STORM. GO TO A SAFE PLACE INSIDE YOUR
HOME OR BUSINESS. STAY AWAY FROM WINDOWS AND GLASS DOORS.

LAT...LON 4109 9666 4105 9662 4104 9636 4118 9634
          4133 9644

NIETFELD

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 Oct 1, 3:05 PM CDT, 2 hours 33 minutes earlier.

Area forecast discussion, Oct 1, 3:05 PM CDT, 2 hours 33 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE OMAHA/VALLEY NE
305 PM CDT TUE OCT 01 2002

CONVECTIVE COVERAGE AND STRENGTH FCST CHALLENGE INTO FRI.  USED
ETA/AVN COMP THRU THU...SLOWER AVN ON FRI...THEN LEANED TWD HPC
SOLUTION IN THE EXTENDED WHICH WAS CLOSER TO ECMWF.

SHORT TERM...WRMFNT SETTING UP N OF PLATTE RIVER WITH CU FIELD
INCREASING N OF IT.  CONVECTION LAST FEW HRS WAS STILL A LTL FTHR N
IN COOLER AIR.  LATEST MSAS DATA SHOWD INSTABILITY AXIS IN AND S OF
CU FIELD AND FCST SOUNDINGS SHOWD CAP WEAKENING THRU 23Z-00Z.  SO
WOULD EXPECT CONVECTION TO DVLP ACRS THIS AREA BFR THIS EVENING.  IF
THAT WOULD FAIL TO DVLP...OTHER ACTIVITY WL LIKELY DVLP AS
INCREASING LOW LVL JET IMPINGES ON CDFNT THAT WL BE DROPG INTO SERN
NEBR.  NET EFFECT WL BE TO INCREASE POPS ALL AREAS.  WILL MENTION
HEAVY RAIN ACRS SRN ZONES AS LOW LVL JET FEEDS INTO THAT AREA ALL
NGT AND SWRLY UPR FLOW WL PROMOTE TRAINING.  SPLIT UP NRN GROUP AND
LOWERED LOWS THERE BASED ON UPSTREAM OBS...WITH A SLIGHT DOWNWARD
ADJUSTMENT S OF THERE.

WILL ALSO INCLUDE POPS N ON WED AND BOOST CHCS ALL AREAS AS
ISENTROPIC LIFT CONTS OVR COOLING AIRMASS.  MADE A LTL DOWNWARD TEMP
ADJUSTMENT...MAINLY CNTRL/N.

SHRTWV TROF STILL FCST TO LIFT ACRS CNTRL PLAINS LATE THU INTO FRI
MORNING...WITH ETA/AVN STARTING TO DEPART.   ATTM WL LEAN TWD SLOWER
AND SLGTLY DEEPER AVN WHICH SUPPORTS HIGHER POPS THU AND PCPN
LINGERING LONGER ON FRI.  ANOTHER POTENTIAL HEAVY RAIN PRODUCER
THU NGT/EARLY FRI AS CURRENT MOISTURE DOESNT GET SHOVED TOO FAR S
WED...PLUS SYSTEM MAY HAVE SUBTROPICAL MSTR TO WORK WITH ON NRN
FRINGES OF LILI IF UPR TROF SLOWS DOWN AND DOESNT PASS THRU UNTIL
LATER ON FRI.

REST OF EXTENDED...LEFT SAT DRY AND ADDED CHC OF SHOWERS ALL ZONES
SUN BASED ON A SLOWER EJECTION OF A WEAKEN TROF.  GENERALLY LOWERED
TEMPS A LTL.  MORE OF A ZONAL FLOW PTN FCST MON/TUE SO WL NOT
MENTION PCPN THOSE PDS.

.OMA...NONE
CHERMOK

Hazardous weather outlook, Oct 1, 5:20 PM CDT, 18 minutes before

IAZ043-055-056-069-079-080-090-091-NEZ011-012-015>018-030>034-
042>045-050>053-065>068-078-088>093-012300-

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE OMAHA/VALLEY NE
520 PM CDT TUE OCT 1 2002

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF EASTERN
NEBRASKA AND SOUTHWEST IOWA.

.DAY ONE...

SCATTERED THUNDERSTORMS WILL CONTINUE TO DEVELOP ACROSS PARTS OF
EASTERN NEBRASKA AND SOUTHWEST IOWA TONIGHT...AHEAD OF A COLD
FRONT MOVING SOUTHEAST THROUGH THE AREA.  DUE TO THE COMBINATION
OF MODERATE INSTABILITY AND FAVORABLE WIND SHEAR
PROFILES...SEVERE WEATHER IS LIKELY AND SEVERE THUNDERSTORM
WATCHES ARE IN EFFECT FOR AREAS SOUTHEAST OF A WAYNE TO SCHUYLER
TO DAVID CITY LINE.  LARGE HAIL AND DAMAGING STRAIGHT LINE WINDS
ARE THE PRIMARY HAZARDS.

.SPOTTER CALL TO ACTION STATEMENT...

STORM SPOTTER ACTIVATION IS REQUIRED SOUTHEAST OF A WAYNE TO
SCHUYLER TO DAVID CITY LINE.

.DAYS TWO THROUGH SEVEN...

SHOWERS AND THUNDERSTORMS REMAIN POSSIBLE OVER MUCH OF THE AREA
WEDNESDAY INTO FRIDAY. STRONG STORMS WITH HEAVY RAIN MAY OCCUR
LATE THURSDAY INTO MID DAY FRIDAY. NO SIGNIFICANT WEATHER IS
FORECAST SATURDAY THROUGH TUESDAY.

THIS PRODUCT...ALONG WITH OTHER WEATHER...HYDROLOGIC AND CLIMATIC
INFORMATION IS AVAILABLE ON THE INTERNET AT
WWW.CRH.NOAA.GOV/OAX OR AT WEATHER.GOV (LOWER CASE)

MEAD

In the hours before

Local storm report, Oct 1, 12:03 PM CDT, 5 hours 35 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE OMAHA/VALLEY NE
1203 PM CDT TUE OCT 01 2002

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

0152 AM    ALVO                      NE   1.75 INCH HAIL
10/01/02   CASS                           REPORTED BY STORM
                                          SPOTTER.

0213 AM    LINCOLN                   NE   .88 INCH HAIL
10/01/02   LANCASTER                      REPORTED BY EMERGENCY
                                          MANAGEMENT AT 27TH AND
                                          HIGHWAY 2.

Local storm report, Oct 1, 12:16 PM CDT, 5 hours 22 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE OMAHA/VALLEY NE
1216 PM CDT TUE OCT 01 2002

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

0258 AM    2 SE TABOR                IA   .88 INCH HAIL
10/01/02   FREMONT                        REPORTED BY PUBLIC.
                                          ALSO 50 MPH WINDS
                                          ESTIMATED.  SOME CROP
                                          DAMAGE.

MILLER

Local storm report, Oct 1, 12:36 PM CDT, 5 hours 2 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE OMAHA/VALLEY NE
1236 PM CDT TUE OCT 01 2002

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

1221 AM    9 N TOBIAS                NE   1.75 INCH HAIL
10/01/02   SALINE                         REPORTED BY PUBLIC.

1247 AM    2 E DORCHESTER            NE   1 INCH HAIL
10/01/02   SALINE                         REPORTED BY COOPERATIVE
                                          OBSERVER.

1253 AM    3 E DORCHESTER            NE   .75 INCH HAIL
10/01/02   SALINE                         REPORTED BY EMERGENCY
                                          MANAGEMENT.

1258 AM    4 W CRETE                 NE   .75 INCH HAIL
10/01/02   SALINE                         REPORTED BY PUBLIC.

0152 AM    ALVO                      NE   1.75 INCH HAIL
10/01/02   CASS                           REPORTED BY STORM
                                          SPOTTER.

0213 AM    LINCOLN                   NE   .88 INCH HAIL
10/01/02   LANCASTER                      REPORTED BY EMERGENCY
                                          MANAGEMENT AT 27TH AND
                                          HIGHWAY 2.

0258 AM    2 SE TABOR                IA   .88 INCH HAIL
10/01/02   FREMONT                        REPORTED BY PUBLIC.
                                          ALSO 50 MPH WINDS
                                          ESTIMATED.  SOME CROP
                                          DAMAGE.

1042 AM    OMAHA                     NE   .88 INCH HAIL
10/01/02   DOUGLAS                        REPORTED BY PUBLIC AT
                                          132ND AND MAPLE.

MILLER

The office that day

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

Issued	Product	Office	Counties	Lasted
Oct 1, 12:15 AM CDT	Severe Thunderstorm Warning	OAX	Saline	30 min
Oct 1, 12:42 AM CDT	Severe Thunderstorm Warning	OAX	Saline	33 min
Oct 1, 1:09 AM CDT	Severe Thunderstorm Warning	OAX	Lancaster	66 min
Oct 1, 1:50 AM CDT	Severe Thunderstorm Warning	OAX	Cass	55 min
Oct 1, 10:23 AM CDT	Severe Thunderstorm Warning	OAX	Douglas	52 min
Oct 1, 5:03 PM CDT	Severe Thunderstorm Warning	OAX	Cass, Sarpy	42 min
Oct 1, 5:11 PM CDT	Severe Thunderstorm Warning	OAX	Jefferson, Saline	34 min
Oct 1, 5:15 PM CDT	Severe Thunderstorm Warning	OAX	Gage	30 min
Oct 1, 5:16 PM CDT	Severe Thunderstorm Warning	OAX	Lancaster	44 min
Oct 1, 5:20 PM CDT	Severe Thunderstorm Warning	OAX	Douglas	40 min
Oct 1, 5:44 PM CDT	Severe Thunderstorm Warning	OAX	Cass, Otoe	46 min
Oct 1, 6:00 PM CDT	Severe Thunderstorm Warning	OAX	Douglas	45 min
Oct 1, 6:07 PM CDT	Severe Thunderstorm Warning	OAX	Lancaster	23 min
Oct 1, 6:16 PM CDT	Severe Thunderstorm Warning	OAX	Washington	44 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.