Alert archive / Nebraska / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 8, NWS Omaha, NE

May 2, 2021Seward County, Nebraska

NWS Omaha, NE issued this severe thunderstorm warning at May 2, 2021, 6:22 PM CDT for Seward County, Nebraska. It was in force for 38 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 2, 2021, 6:22 PM CDT (23:22 UTC)
Expired
May 2, 2021, 7:00 PM CDT
In force
38 min
Issued by
NWS Omaha, NE
Area
Storm-based polygon
Hail
1.0 in
Wind
50.0 mph

County Seward County, NE

The radar

The Omaha radar (KOAX), 82 km from the middle of the area, began a volume at 23:26 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 2, 6:23 PM CDTHAIL 1Goehner, NEREPORT FROM MPING: QUARTER (1.00 IN.).

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, 11.4 hours before the alert went out and 82 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 2021-05-02Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 179 joules per kilogram.LCLLFCEL10008507005003002001001 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 2021-05-02The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 187 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
179 J/kg
Mixed-layer CIN
-495 J/kg
Mixed-layer LCL
1127 m above ground
0-6 km bulk shear
16 kt
0-1 km storm-relative helicity
187 m²/s²
0-3 km storm-relative helicity
215 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

371 
WUUS53 KOAX 022322
SVROAX
NEC159-030000-
/O.NEW.KOAX.SV.W.0008.210502T2322Z-210503T0000Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Omaha/Valley Nebraska
622 PM CDT Sun May 2 2021

The National Weather Service in Omaha has issued a

* Severe Thunderstorm Warning for...
  Central Seward County in southeastern Nebraska...

* Until 700 PM CDT.

* At 622 PM CDT, a severe thunderstorm was located 5 miles northeast
  of Beaver Crossing, or 20 miles east of York, moving northeast at
  10 mph.

  HAZARD...Quarter size hail.

  SOURCE...Radar indicated.

  IMPACT...Damage to vehicles is expected.

* Locations impacted include...
  Seward, Goehner and Tamora. 

This includes Interstate 80 in Nebraska between mile markers 373 and
382.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4076 9717 4086 9728 4100 9708 4087 9692
TIME...MOT...LOC 2322Z 229DEG 9KT 4083 9720 

HAIL...1.00IN
WIND...<50MPH
 
$$

Fajman
2 follow-up statements
089 
WWUS53 KOAX 022334
SVSOAX

Severe Weather Statement
National Weather Service Omaha/Valley Nebraska
634 PM CDT Sun May 2 2021

NEC159-030000-
/O.CON.KOAX.SV.W.0008.000000T0000Z-210503T0000Z/
Seward NE-
634 PM CDT Sun May 2 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 700 PM CDT
FOR CENTRAL SEWARD COUNTY...

At 634 PM CDT, a severe thunderstorm was located 5 miles southwest of
Seward, or 22 miles east of York, moving northeast at 10 mph.

HAZARD...Quarter size hail.

SOURCE...Trained weather spotters.

IMPACT...Damage to vehicles is expected.

Locations impacted include...
Seward.

This includes Interstate 80 in Nebraska between mile markers 375 and
382.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4078 9715 4086 9724 4100 9708 4087 9692
TIME...MOT...LOC 2334Z 229DEG 9KT 4085 9717 

HAIL...1.00IN
WIND...<50MPH
 
$$

Fajman
522 
WWUS53 KOAX 022358
SVSOAX

Severe Weather Statement
National Weather Service Omaha/Valley Nebraska
658 PM CDT Sun May 2 2021

NEC159-030007-
/O.EXP.KOAX.SV.W.0008.000000T0000Z-210503T0000Z/
Seward NE-
658 PM CDT Sun May 2 2021

...THE SEVERE THUNDERSTORM WARNING FOR CENTRAL SEWARD COUNTY WILL
EXPIRE AT 700 PM CDT...
                
The storm which prompted the warning has weakened below severe
limits, and no longer poses an immediate threat to life or property.
Therefore, the warning will be allowed to expire. However small hail 
is still possible with this thunderstorm.

LAT...LON 4078 9715 4086 9724 4100 9708 4087 9692
TIME...MOT...LOC 2357Z 229DEG 9KT 4089 9711 

$$

Fajman

The office that day

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

IssuedProductOfficeCountiesLasted
May 2, 6:17 PM CDTSevere Thunderstorm WarningOAXDodge, Saunders, Washington43 min
May 2, 6:55 PM CDTSevere Thunderstorm WarningOAXBurt, Washington50 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.