Alert archive / Nebraska / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 22, NWS Omaha, NE

May 5, 2021Saline County, Seward County, Nebraska

NWS Omaha, NE issued this severe thunderstorm warning at May 5, 2021, 5:04 PM CDT for Saline County, Seward County, Nebraska. It was in force for 41 min. 1 report 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
May 5, 2021, 5:04 PM CDT (22:04 UTC)
Expired
May 5, 2021, 5:45 PM CDT
In force
41 min
Issued by
NWS Omaha, NE
Area
Storm-based polygon
Hail
1.5 in
Wind
60.0 mph

Counties Saline County, NE, Seward County, NE

The radar

The Omaha radar (KOAX), 101 km from the middle of the area, began a volume at 22:05 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

TimeReportWhereRemark
May 5, 5:18 PM CDTHAIL 1.53 N Dorchester, NE

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Omaha, NE (KOAX), launched 12:00Z, 10.1 hours before the alert went out and 101 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 2021-05-05Temperature 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 2021-05-05The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 47 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
2603 m above ground
0-6 km bulk shear
28 kt
0-1 km storm-relative helicity
47 m²/s²
0-3 km storm-relative helicity
75 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

749 
WUUS53 KOAX 052204
SVROAX
NEC151-159-052245-
/O.NEW.KOAX.SV.W.0022.210505T2204Z-210505T2245Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Omaha/Valley Nebraska
504 PM CDT Wed May 5 2021

The National Weather Service in Omaha has issued a

* Severe Thunderstorm Warning for...
  Southern Seward County in southeastern Nebraska...
  Northern Saline County in southeastern Nebraska...

* Until 545 PM CDT.

* At 503 PM CDT, a severe thunderstorm was located near Beaver
  Crossing, or 18 miles southeast of York, moving east at 25 mph.

  HAZARD...Ping pong ball size hail and 60 mph wind gusts.

  SOURCE...Radar indicated.

  IMPACT...People and animals outdoors will be injured. Expect hail 
           damage to roofs, siding, windows, and vehicles. Expect 
           wind damage to roofs, siding, and trees.

* Locations impacted include...
  Crete, Milford, Friend, Dorchester, Beaver Crossing, Cordova,
  Walnut Creek Recreation Area and Blue River State Recreation Area.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

&&

LAT...LON 4062 9737 4074 9737 4081 9736 4076 9691
      4048 9692
TIME...MOT...LOC 2203Z 288DEG 23KT 4073 9730 

HAIL...1.50IN
WIND...60MPH
 
$$

Dergan
3 follow-up statements
708 
WWUS53 KOAX 052221
SVSOAX

Severe Weather Statement
National Weather Service Omaha/Valley Nebraska
521 PM CDT Wed May 5 2021

NEC151-159-052245-
/O.CON.KOAX.SV.W.0022.000000T0000Z-210505T2245Z/
Seward NE-Saline NE-
521 PM CDT Wed May 5 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 545 PM CDT
FOR SOUTHERN SEWARD AND NORTHERN SALINE COUNTIES...

At 521 PM CDT, a severe thunderstorm was located over Dorchester, or
24 miles southwest of Lincoln, moving southeast at 30 mph.

HAZARD...Ping pong ball size hail and 60 mph wind gusts.

SOURCE...Radar indicated.

IMPACT...People and animals outdoors will be injured. Expect hail 
         damage to roofs, siding, windows, and vehicles. Expect wind 
         damage to roofs, siding, and trees.

Locations impacted include...
Crete, Milford, Friend, Dorchester, Beaver Crossing, Cordova, Walnut
Creek Recreation Area and Blue River State Recreation Area.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

&&

LAT...LON 4062 9737 4074 9737 4080 9728 4076 9691
      4048 9692
TIME...MOT...LOC 2221Z 292DEG 27KT 4067 9712 

HAIL...1.50IN
WIND...60MPH
 
$$

Dergan
574 
WWUS53 KOAX 052231
SVSOAX

Severe Weather Statement
National Weather Service Omaha/Valley Nebraska
531 PM CDT Wed May 5 2021

NEC151-159-052245-
/O.CON.KOAX.SV.W.0022.000000T0000Z-210505T2245Z/
Seward NE-Saline NE-
531 PM CDT Wed May 5 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 545 PM CDT
FOR SOUTHEASTERN SEWARD AND NORTHERN SALINE COUNTIES...

At 530 PM CDT, a severe thunderstorm was located near Dorchester, or
21 miles southwest of Lincoln, moving east at 25 mph.

HAZARD...Ping pong ball size hail and 60 mph wind gusts.

SOURCE...Radar indicated.

IMPACT...People and animals outdoors will be injured. Expect hail 
         damage to roofs, siding, windows, and vehicles. Expect wind 
         damage to roofs, siding, and trees.

Locations impacted include...
Crete, Milford, Friend, Dorchester, Walnut Creek Recreation Area and
Blue River State Recreation Area.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

&&

LAT...LON 4061 9735 4070 9723 4078 9711 4076 9691
      4048 9692
TIME...MOT...LOC 2230Z 288DEG 23KT 4065 9704 

HAIL...1.50IN
WIND...60MPH
 
$$

Dergan
648 
WWUS53 KOAX 052249
SVSOAX

Severe Weather Statement
National Weather Service Omaha/Valley Nebraska
549 PM CDT Wed May 5 2021

NEC151-159-052258-
/O.EXP.KOAX.SV.W.0022.000000T0000Z-210505T2245Z/
Seward NE-Saline NE-
549 PM CDT Wed May 5 2021

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN SEWARD AND
NORTHERN SALINE COUNTIES HAS EXPIRED...
        
The storm which prompted the warning has moved out of the area.
Therefore, the warning has been allowed to expire.  However gusty
winds are still possible in the wake of the thunderstorm.

Remember, a Severe Thunderstorm Warning still remains in effect for
eastern Saline County until 630 PM.

LAT...LON 4061 9735 4070 9723 4078 9711 4076 9691
      4048 9692
TIME...MOT...LOC 2248Z 288DEG 23KT 4062 9692 

$$

Dergan

The office that day

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

IssuedProductOfficeCountiesLasted
May 5, 3:33 PM CDTSevere Thunderstorm WarningOAXMadison42 min
May 5, 3:47 PM CDTSevere Thunderstorm WarningOAXCedar43 min
May 5, 4:14 PM CDTSevere Thunderstorm WarningOAXMadison, Platte, Stanton46 min
May 5, 4:22 PM CDTSpecial Weather StatementOAXSeward53 min
May 5, 4:45 PM CDTTornado Warning Tornado observedOAXCedar30 min
May 5, 5:39 PM CDTSevere Thunderstorm WarningOAXGage, Lancaster, Saline51 min
May 5, 6:18 PM CDTSpecial Weather StatementOAXGage27 min

Nearby

Severe Thunderstorm Warnings in Nebraska, 2021Every severe thunderstorm warning in 2021

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.