Alert archive / Nebraska / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 9, NWS Omaha, NE
NWS Omaha, NE issued this severe thunderstorm warning at May 2, 2021, 6:55 PM CDT for Burt County, Washington County, Nebraska; Harrison County, Iowa. It was in force for 50 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
- May 2, 2021, 6:55 PM CDT (23:55 UTC)
- Expired
- May 2, 2021, 7:45 PM CDT
- In force
- 50 min
- Issued by
- NWS Omaha, NE
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 50.0 mph
Counties Harrison County, IA, Burt County, NE, Washington County, NE
The radar
The Omaha radar (KOAX), 39 km from the middle of the area, began a volume at 23:56 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 nearest sounding before it
Omaha, NE (KOAX), launched 12:00Z, 11.9 hours before the alert went out and 39 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
- 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
The text
As transmitted.
972 WUUS53 KOAX 022355 SVROAX IAC085-NEC021-177-030045- /O.NEW.KOAX.SV.W.0009.210502T2355Z-210503T0045Z/ BULLETIN - IMMEDIATE BROADCAST REQUESTED Severe Thunderstorm Warning National Weather Service Omaha/Valley Nebraska 655 PM CDT Sun May 2 2021 The National Weather Service in Omaha has issued a * Severe Thunderstorm Warning for... West central Harrison County in southwestern Iowa... Southeastern Burt County in east central Nebraska... Northwestern Washington County in east central Nebraska... * Until 745 PM CDT. * At 655 PM CDT, a severe thunderstorm was located 9 miles northwest of Blair, or 28 miles northwest of Omaha, moving northeast at 15 mph. HAZARD...Quarter size hail. SOURCE...Radar indicated. IMPACT...Damage to vehicles is expected. * Locations impacted include... Mondamin and Herman. This includes Interstate 29 between mile markers 86 and 89. PRECAUTIONARY/PREPAREDNESS ACTIONS... For your protection move to an interior room on the lowest floor of a building. && LAT...LON 4155 9626 4165 9638 4181 9611 4168 9597 TIME...MOT...LOC 2355Z 236DEG 15KT 4162 9630 HAIL...1.00IN WIND...<50MPH $$ Fajman
3 follow-up statements
283 WWUS53 KOAX 030022 SVSOAX Severe Weather Statement National Weather Service Omaha/Valley Nebraska 722 PM CDT Sun May 2 2021 IAC085-NEC021-177-030045- /O.CON.KOAX.SV.W.0009.000000T0000Z-210503T0045Z/ Harrison IA-Burt NE-Washington NE- 722 PM CDT Sun May 2 2021 ...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 745 PM CDT FOR WEST CENTRAL HARRISON...SOUTHEASTERN BURT AND NORTHWESTERN WASHINGTON COUNTIES... At 722 PM CDT, a severe thunderstorm was located 6 miles south of Tekamah, or 30 miles north of Omaha, moving northeast at 15 mph. HAZARD...Quarter size hail. SOURCE...Trained weather spotters. IMPACT...Damage to vehicles is expected. Locations impacted include... Mondamin and Herman. This includes Interstate 29 between mile markers 86 and 89. PRECAUTIONARY/PREPAREDNESS ACTIONS... For your protection move to an interior room on the lowest floor of a building. && LAT...LON 4155 9626 4162 9634 4177 9607 4168 9597 TIME...MOT...LOC 0022Z 236DEG 15KT 4168 9617 HAIL...1.00IN WIND...<50MPH $$ Fajman
227
WWUS53 KOAX 030033
SVSOAX
Severe Weather Statement
National Weather Service Omaha/Valley Nebraska
733 PM CDT Sun May 2 2021
NEC021-030042-
/O.CAN.KOAX.SV.W.0009.000000T0000Z-210503T0045Z/
Burt NE-
733 PM CDT Sun May 2 2021
...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN BURT COUNTY IS
CANCELLED...
The severe thunderstorm which prompted the warning has moved out of
the warned area. Therefore, the warning has been cancelled.
LAT...LON 4157 9622 4162 9627 4169 9616 4168 9613
4170 9611 4170 9608 4171 9607 4173 9609
4175 9605 4168 9597
TIME...MOT...LOC 0032Z 236DEG 15KT 4170 9612
$$
IAC085-NEC177-030045-
/O.CON.KOAX.SV.W.0009.000000T0000Z-210503T0045Z/
Harrison IA-Washington NE-
733 PM CDT Sun May 2 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 745 PM CDT
FOR WEST CENTRAL HARRISON AND NORTH CENTRAL WASHINGTON COUNTIES...
At 732 PM CDT, a severe thunderstorm was located 5 miles west of
Mondamin, or 30 miles north of Omaha, moving northeast at 15 mph.
HAZARD...Quarter size hail.
SOURCE...Trained weather spotters.
IMPACT...Damage to vehicles is expected.
Locations impacted include...
Mondamin.
This includes Interstate 29 between mile markers 86 and 89.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 4157 9622 4162 9627 4169 9616 4168 9613
4170 9611 4170 9608 4171 9607 4173 9609
4175 9605 4168 9597
TIME...MOT...LOC 0032Z 236DEG 15KT 4170 9612
HAIL...1.00IN
WIND...<50MPH
$$
Fajman285
WWUS53 KOAX 030043
SVSOAX
Severe Weather Statement
National Weather Service Omaha/Valley Nebraska
743 PM CDT Sun May 2 2021
IAC085-NEC177-030053-
/O.EXP.KOAX.SV.W.0009.000000T0000Z-210503T0045Z/
Harrison IA-Washington NE-
743 PM CDT Sun May 2 2021
...THE SEVERE THUNDERSTORM WARNING FOR WEST CENTRAL HARRISON AND
NORTH CENTRAL WASHINGTON COUNTIES WILL EXPIRE AT 745 PM CDT...
The storm which prompted the warning has moved out of the area.
Therefore, the warning will be allowed to expire.
LAT...LON 4157 9622 4162 9627 4169 9616 4168 9613
4170 9611 4170 9608 4171 9607 4173 9609
4175 9605 4168 9597
TIME...MOT...LOC 0043Z 236DEG 15KT 4172 9608
$$
FajmanThe office that day
Everything else NWS Omaha, NE issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 2, 6:17 PM CDT | Severe Thunderstorm Warning | OAX | Dodge, Saunders, Washington | 43 min |
| May 2, 6:22 PM CDT | Severe Thunderstorm Warning | OAX | Seward | 38 min |
Nearby
Severe Thunderstorm Warnings in Nebraska, 2021Severe Thunderstorm Warnings in Iowa, 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.