Alert archive / Nebraska / Severe Thunderstorm Warnings in 2005

Severe Thunderstorm Warning 21, NWS Omaha, NE

April 18, 2005Lancaster County, Saunders County, Nebraska

NWS Omaha, NE issued this severe thunderstorm warning at Apr 18, 2005, 4:21 PM CDT for Lancaster County, Saunders County, Nebraska. It was in force for 39 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
Apr 18, 2005, 4:21 PM CDT (21:21 UTC)
Expired
Apr 18, 2005, 5:00 PM CDT
In force
39 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), 35 km from the middle of the area, began a volume at 21:22 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.

The watch it was issued in

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

IssuedProductOfficeLasted
Apr 18, 3:30 PM CDTSevere Thunderstorm WatchSPC7 hr

The nearest sounding before it

Omaha, NE (KOAX), launched 12:00Z, 9.4 hours before the alert went out and 34 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-pSkew-T log-p diagram, Omaha, NE at 12:00Z on 2005-04-18Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Omaha, NE at 12:00Z on 2005-04-18The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -109 square meters per square second.193958Sfc1 km3 km6 km9 kmRMLM
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
1390 m above ground
0-6 km bulk shear
10 kt
0-1 km storm-relative helicity
-109 m²/s²
0-3 km storm-relative helicity
-95 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

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

000 
WUUS53 KOAX 182121
SVROAX
NEC109-155-182200-
/O.NEW.KOAX.SV.W.0021.050418T2121Z-050418T2200Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE OMAHA/VALLEY NEBRASKA
421 PM CDT MON APR 18 2005

THE NATIONAL WEATHER SERVICE IN OMAHA HAS ISSUED A

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

* UNTIL 500 PM CDT

* AT 417 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL.  THIS
  STORM WAS LOCATED NEAR WAVERLY...OR ABOUT 6 MILES NORTHEAST OF
  LINCOLN...AND MOVING NORTH AT 35 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  MEAD AND YUTAN AROUND 455 PM CDT

THIS INCLUDES INTERSTATE 80 IN NEBRASKA BETWEEN MILE MARKERS 403 AND
409.

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.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 1000 PM CDT
MONDAY EVENING FOR SOUTHWESTERN IOWA AND EASTERN NEBRASKA.

LAT...LON 4087 9676 4080 9654 4101 9644 4106 9635
      4130 9640 4142 9670

$$

NIETFELD
3 follow-up statements
000 
WWUS53 KOAX 182129
SVSOAX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE OMAHA/VALLEY NEBRASKA
429 PM CDT MON APR 18 2005

NEC109-155-182200-
/O.CON.KOAX.SV.W.0021.000000T0000Z-050418T2200Z/
SAUNDERS NE-LANCASTER NE-
429 PM CDT MON APR 18 2005

...A SEVERE THUNDERSTORM WARNING CONTINUES UNTIL 500 PM CDT FOR 
NORTHERN LANCASTER AND SAUNDERS COUNTIES...

AT 426 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE
HAIL.  THIS STORM WAS LOCATED NEAR DAVEY...OR ABOUT 11 MILES NORTH OF
LINCOLN...MOVING NORTH AT 35 MPH.

THE SEVERE THUNDERSTORM WILL BE NEAR...
  CERESCO BY 435 PM CDT
  WESTON AND ITHACA BY 450 PM CDT
  WAHOO AND MALMO BY 455 PM CDT
  COLON BY 500 PM CDT

THIS STORM MAY PRODUCE HAIL ONE INCH IN DIAMETER OR LARGER. GO TO THE
LOWEST LEVEL OF YOUR HOME OR BUSINESS. STAY AWAY FROM WINDOWS AND
GLASS DOORS.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 1000 PM CDT
MONDAY EVENING FOR SOUTHWESTERN IOWA AND EASTERN NEBRASKA.

LAT...LON 4103 9678 4090 9654 4101 9644 4106 9635
      4130 9640 4142 9670

$$

NIETFELD
000 
WWUS53 KOAX 182143
SVSOAX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE OMAHA/VALLEY NEBRASKA
442 PM CDT MON APR 18 2005

NEC109-182152-
/O.CAN.KOAX.SV.W.0021.000000T0000Z-050418T2200Z/
LANCASTER NE-
442 PM CDT MON APR 18 2005

...THE SEVERE THUNDERSTORM WARNING FOR LANCASTER COUNTY IS
CANCELLED...

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 1000 PM CDT
MONDAY EVENING FOR SOUTHWESTERN IOWA AND EASTERN NEBRASKA.

LAT...LON 4106 9679 4105 9651 4106 9647 4106 9645
      4130 9640 4142 9656 4142 9670

$$

NEC155-182200-
/O.CON.KOAX.SV.W.0021.000000T0000Z-050418T2200Z/
SAUNDERS NE-
442 PM CDT MON APR 18 2005

...A SEVERE THUNDERSTORM WARNING CONTINUES UNTIL 500 PM CDT FOR
SAUNDERS COUNTY...

AT 441 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE
HAIL.  THIS STORM WAS LOCATED 10 MILES SOUTHWEST OF ITHACA...OR ABOUT
16 MILES NORTH OF LINCOLN...MOVING NORTH AT 35 MPH.

THE SEVERE THUNDERSTORM WILL BE NEAR...
  WESTON AND ITHACA BY 450 PM CDT
  WAHOO BY 455 PM CDT
  COLON AND MALMO BY 500 PM CDT

THIS STORM MAY PRODUCE HAIL ONE INCH IN DIAMETER OR LARGER. GO TO THE
LOWEST LEVEL OF YOUR HOME OR BUSINESS. STAY AWAY FROM WINDOWS AND
GLASS DOORS.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 1000 PM CDT
MONDAY EVENING FOR SOUTHWESTERN IOWA AND EASTERN NEBRASKA.

LAT...LON 4106 9679 4105 9651 4106 9647 4106 9645
      4130 9640 4142 9656 4142 9670

$$

NIETFELD
000 
WWUS53 KOAX 182155
SVSOAX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE OMAHA/VALLEY NEBRASKA
454 PM CDT MON APR 18 2005

NEC155-182200-
/O.CON.KOAX.SV.W.0021.000000T0000Z-050418T2200Z/
SAUNDERS NE-
454 PM CDT MON APR 18 2005

...A SEVERE THUNDERSTORM WARNING CONTINUES UNTIL 500 PM CDT FOR
SAUNDERS COUNTY...

AT 452 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE
HAIL.  THIS STORM WAS LOCATED NEAR WAHOO...OR ABOUT 27 MILES NORTH OF
LINCOLN...MOVING NORTH AT 35 MPH.

THE SEVERE THUNDERSTORM WILL BE NEAR...
  COLON BY 500 PM CDT

THIS STORM MAY PRODUCE HAIL ONE INCH IN DIAMETER OR LARGER. GO TO THE
LOWEST LEVEL OF YOUR HOME OR BUSINESS. STAY AWAY FROM WINDOWS AND
GLASS DOORS.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 1000 PM CDT
MONDAY EVENING FOR SOUTHWESTERN IOWA AND EASTERN NEBRASKA.

LAT...LON 4106 9679 4105 9651 4106 9647 4106 9645
      4130 9640 4142 9656 4142 9670

$$

NIETFELD

The office that day

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

IssuedProductOfficeCountiesLasted
Apr 18, 4:59 PM CDTSevere Thunderstorm WarningOAXDodge, Saunders46 min
Apr 18, 5:33 PM CDTSevere Thunderstorm WarningOAXButler27 min
Apr 18, 5:43 PM CDTSevere Thunderstorm WarningOAXDodge32 min
Apr 18, 5:45 PM CDTSevere Thunderstorm WarningOAXCuming, Wayne30 min
Apr 18, 6:32 PM CDTSevere Thunderstorm WarningOAXSeward28 min
Apr 18, 6:56 PM CDTSevere Thunderstorm WarningOAXSeward49 min

Nearby

Severe Thunderstorm Warnings in Nebraska, 2005Every severe thunderstorm warning in 2005

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.