Alert archive / Nebraska / Severe Thunderstorm Warnings in 2002

Severe Thunderstorm Warning 21, NWS Omaha, NE

April 16, 2002Lancaster County, Saunders County, Nebraska

NWS Omaha, NE issued this severe thunderstorm warning at Apr 16, 2002, 8:54 PM CDT for Lancaster County, Saunders County, Nebraska. It was in force for 36 min. 3 reports came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued: Apr 16, 2002, 8:54 PM CDT (01:54 UTC)
Expired: Apr 16, 2002, 9:30 PM CDT
In force: 36 min
Issued by: NWS Omaha, NE
Area: Counties, with a storm outline in the text

Counties Lancaster County, NE, Saunders County, NE

The radar

The Omaha radar (KOAX), 40 km from the middle of the area, began a volume at 01:55 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
Apr 16, 9:11 PM CDT	Hail 0.75	Ceresco, NE
Apr 16, 9:15 PM CDT	Hail 0.75	Raymond, NE
Apr 16, 9:20 PM CDT	Hail 0.75	Ithaca, 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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Apr 16, 4:00 PM CDT	Severe Thunderstorm Watch	SPC	5 hr
Apr 16, 7:15 PM CDT	Severe Thunderstorm Watch	SPC	5 hr

The nearest sounding before it

Omaha, NE (KOAX), launched 00:00Z, 1.9 hours before the alert went out and 40 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: 1974 J/kg
Mixed-layer CIN: -50 J/kg
Mixed-layer LCL: 1343 m above ground
0-6 km bulk shear: 37 kt
0-1 km storm-relative helicity: 136 m²/s²
0-3 km storm-relative helicity: 196 m²/s²
Significant tornado parameter: 1.1
Supercell composite: 8.0

Open this sounding in Storm Lab

The text

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

000 
WUUS53 KOAX 170154
SVROMA
NEC109-155-170230-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE OMAHA NE
853 PM CDT TUE APR 16 2002

THE NATIONAL WEATHER SERVICE IN OMAHA HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SAUNDERS COUNTY IN EAST CENTRAL NEBRASKA
  LANCASTER COUNTY IN SOUTHEAST NEBRASKA
  THIS INCLUDES THE CITY OF LINCOLN

* UNTIL 930 PM CDT

* AT 850 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
  SEVERE THUNDERSTORMS WITH DAMAGING WIND FROM 4 MILES WEST OF MORSE
  BLUFF TO 10 MILES SOUTHWEST OF SPRAGUE...OR FROM 26 MILES EAST OF
  COLUMBUS TO 20 MILES NORTHWEST OF BEATRICE...MOVING EAST AT 35 MPH.

* SOME LOCATIONS AFFECTED...
  WAHOO...ROCA...LINCOLN...HICKMAN
  WAVERLY...PANAMA...MEAD...ITHACA

THIS LINE OF STORMS HAS A HISTORY OF PRODUCING LARGE HAIL AND 
DAMAGING WINDS IN EXCESS OF 65 MPH.

IF YOU ARE IN THE WARNED AREA...PREPARE FOR DAMAGING WINDS...LARGE
HAIL...HEAVY RAIN AND DANGEROUS LIGHTNING. GET INTO A REINFORCED
BUILDING. STAY AWAY FROM WINDOWS AND GLASS DOORS.

LAT...LON 4144 9687 4054 9689 4056 9648 4140 9647

MEAD

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 16, 7:38 PM CDT	Severe Thunderstorm Warning	OAX	Madison, Pierce, Stanton, Wayne	37 min
Apr 16, 8:02 PM CDT	Severe Thunderstorm Warning	OAX	Colfax, Platte	28 min
Apr 16, 8:23 PM CDT	Severe Thunderstorm Warning	OAX	Butler	52 min
Apr 16, 8:24 PM CDT	Severe Thunderstorm Warning	OAX	Stanton	51 min
Apr 16, 8:32 PM CDT	Severe Thunderstorm Warning	OAX	Cuming, Thurston	43 min
Apr 16, 8:33 PM CDT	Severe Thunderstorm Warning	OAX	Colfax	27 min
Apr 16, 8:49 PM CDT	Severe Thunderstorm Warning	OAX	Dodge	41 min
Apr 16, 9:12 PM CDT	Severe Thunderstorm Warning	OAX	Burt, Washington	48 min
Apr 16, 9:16 PM CDT	Severe Thunderstorm Warning	OAX	Thurston	29 min
Apr 16, 9:32 PM CDT	Severe Thunderstorm Warning	OAX	Douglas	28 min
Apr 17, 6:59 PM CDT	Severe Thunderstorm Warning	OAX	Dodge	31 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.