Alert archive / Nebraska / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 21, NWS Omaha, NE
NWS Omaha, NE issued this severe thunderstorm warning at May 5, 2021, 4:14 PM CDT for Madison County, Platte County, Stanton County, Nebraska. It was in force for 46 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, 4:14 PM CDT (21:14 UTC)
- Expired
- May 5, 2021, 5:00 PM CDT
- In force
- 46 min
- Issued by
- NWS Omaha, NE
- Area
- Storm-based polygon
- Hail
- 1.5 in
- Wind
- 50.0 mph
Counties Madison County, NE, Platte County, NE, Stanton County, NE
The radar
The Omaha radar (KOAX), 113 km from the middle of the area, began a volume at 21:14 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 | Remark |
|---|---|---|---|
| May 5, 4:25 PM CDT | HAIL 1 | 1 Nnw Madison, NE | HAIL UP TO QUARTER SIZE. A SECOND ROUND OF PEA SIZE HAIL OCCURRED 15 MINUTES LATER. |
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, 9.2 hours before the alert went out and 113 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.
- 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
The text
As transmitted.
762
WUUS53 KOAX 052114
SVROAX
NEC119-141-167-052200-
/O.NEW.KOAX.SV.W.0021.210505T2114Z-210505T2200Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Omaha/Valley Nebraska
414 PM CDT Wed May 5 2021
The National Weather Service in Omaha has issued a
* Severe Thunderstorm Warning for...
Southeastern Madison County in northeastern Nebraska...
North central Platte County in northeastern Nebraska...
Southwestern Stanton County in northeastern Nebraska...
* Until 500 PM CDT.
* At 414 PM CDT, a severe thunderstorm was located 6 miles northwest
of Madison, or 13 miles southwest of Norfolk, moving southeast at
15 mph.
HAZARD...Ping pong ball size hail.
SOURCE...Radar indicated.
IMPACT...People and animals outdoors will be injured. Expect
damage to roofs, siding, windows, and vehicles.
* Locations impacted include...
Madison.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 4184 9772 4196 9762 4194 9729 4175 9734
4169 9752
TIME...MOT...LOC 2114Z 300DEG 11KT 4186 9756
HAIL...1.50IN
WIND...<50MPH
$$
Dergan2 follow-up statements
036
WWUS53 KOAX 052132
SVSOAX
Severe Weather Statement
National Weather Service Omaha/Valley Nebraska
432 PM CDT Wed May 5 2021
NEC119-141-167-052200-
/O.CON.KOAX.SV.W.0021.000000T0000Z-210505T2200Z/
Madison NE-Platte NE-Stanton NE-
432 PM CDT Wed May 5 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 500 PM CDT
FOR SOUTHEASTERN MADISON...NORTHERN PLATTE AND SOUTHWESTERN STANTON
COUNTIES...
At 432 PM CDT, a severe thunderstorm was located over Madison, or 13
miles south of Norfolk, moving east at 15 mph.
HAZARD...Ping pong ball size hail.
SOURCE...Radar indicated.
IMPACT...People and animals outdoors will be injured. Expect damage
to roofs, siding, windows, and vehicles.
Locations impacted include...
Madison.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 4184 9764 4194 9756 4194 9729 4175 9734
4169 9752
TIME...MOT...LOC 2132Z 289DEG 13KT 4185 9747
HAIL...1.50IN
WIND...<50MPH
$$
Dergan588
WWUS53 KOAX 052152
SVSOAX
Severe Weather Statement
National Weather Service Omaha/Valley Nebraska
452 PM CDT Wed May 5 2021
NEC119-141-167-052201-
/O.EXP.KOAX.SV.W.0021.000000T0000Z-210505T2200Z/
Madison NE-Platte NE-Stanton NE-
452 PM CDT Wed May 5 2021
...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN MADISON...
NORTHERN PLATTE AND SOUTHWESTERN STANTON COUNTIES WILL EXPIRE AT 500
PM CDT...
The storm which prompted the warning has weakened and no longer
poses an immediate threat to life or property. Therefore, the
warning will be allowed to expire. However small hail and gusty
winds are still possible with this thunderstorm.
LAT...LON 4184 9764 4194 9756 4194 9729 4175 9734
4169 9752
TIME...MOT...LOC 2151Z 300DEG 11KT 4182 9740
$$
DerganThe office that day
Everything else NWS Omaha, NE issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 5, 3:33 PM CDT | Severe Thunderstorm Warning | OAX | Madison | 42 min |
| May 5, 3:47 PM CDT | Severe Thunderstorm Warning | OAX | Cedar | 43 min |
| May 5, 4:22 PM CDT | Special Weather Statement | OAX | Seward | 53 min |
| May 5, 4:45 PM CDT | Tornado Warning | OAX | Cedar | 30 min |
| May 5, 5:04 PM CDT | Severe Thunderstorm Warning | OAX | Saline, Seward | 41 min |
| May 5, 5:39 PM CDT | Severe Thunderstorm Warning | OAX | Gage, Lancaster, Saline | 51 min |
| May 5, 6:18 PM CDT | Special Weather Statement | OAX | Gage | 27 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.