Alert archive / Nebraska / Severe Thunderstorm Warnings in 2018
Severe Thunderstorm Warning 21, NWS Omaha, NE
NWS Omaha, NE issued this severe thunderstorm warning at May 1, 2018, 4:55 PM CDT for 4 counties in Nebraska. It was in force for 50 min. 6 reports 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 1, 2018, 4:55 PM CDT (21:55 UTC)
- Expired
- May 1, 2018, 5:45 PM CDT
- In force
- 50 min
- Issued by
- NWS Omaha, NE
- Area
- Storm-based polygon
- Hail
- 2.75 in
- Wind
- 60.0 mph
Counties Butler County, NE, Colfax County, NE, Dodge County, NE, Saunders County, NE
The radar
The Omaha radar (KOAX), 43 km from the middle of the area, began a volume at 21:54 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 1, 4:58 PM CDT | FUNNEL CLOUD | 2 Sw Abie, NE | |
| May 1, 4:59 PM CDT | HAIL 2 | 3 Wnw Abie, NE | RELAYED VIA FACEBOOK. |
| May 1, 5:00 PM CDT | HAIL 1.75 | Linwood, NE | |
| May 1, 5:16 PM CDT | HAIL 1.75 | Linwood, NE | RELAYED VIA SOCIAL MEDIA. |
| May 1, 5:27 PM CDT | HAIL 1.25 | North Bend, NE | RELAYED VIA RETIRED NWS EMPLOYEE. |
| May 1, 5:39 PM CDT | HAIL 1 | 3 Nw North Bend, NE |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| May 1, 2:47 PM CDT | Tornado Watch | SPC | 9 hr |
The nearest sounding before it
Omaha, NE (KOAX), launched 12:00Z, 9.9 hours before the alert went out and 42 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
- 787 J/kg
- Mixed-layer CIN
- -48 J/kg
- Mixed-layer LCL
- 955 m above ground
- 0-6 km bulk shear
- 53 kt
- 0-1 km storm-relative helicity
- 74 m²/s²
- 0-3 km storm-relative helicity
- 57 m²/s²
- Significant tornado parameter
- 0.3
- Supercell composite
- 2.2
The text
As transmitted.
195
WUUS53 KOAX 012155
SVROAX
NEC023-037-053-155-012245-
/O.NEW.KOAX.SV.W.0021.180501T2155Z-180501T2245Z/
BULLETIN - EAS ACTIVATION REQUESTED
Severe Thunderstorm Warning
National Weather Service Omaha/Valley Nebraska
455 PM CDT TUE MAY 1 2018
The National Weather Service in Omaha has issued a
* Severe Thunderstorm Warning for...
Southeastern Colfax County in northeastern Nebraska...
Southwestern Dodge County in east central Nebraska...
Northeastern Butler County in east central Nebraska...
Northwestern Saunders County in east central Nebraska...
* Until 545 PM CDT
* At 454 PM CDT, a severe thunderstorm was located 6 miles south of
Schuyler, or 17 miles east of Columbus, moving northeast at 30 mph.
This is a very dangerous storm.
HAZARD...Baseball size hail and 60 mph wind gusts.
SOURCE...Trained weather spotters reported two inch hail north of
David City and golf ball size hail in Octavia with this
storm.
IMPACT...People and animals outdoors will be severely injured.
Expect shattered windows, extensive damage to roofs,
siding, and vehicles.
* Locations impacted include...
North Bend, Cedar Bluffs, Prague, Morse Bluff, Octavia, Bruno,
Rogers, Linwood, Abie, Camp Eagle, Camp Cedars and Fremont Lakes
State Recreation Area.
This includes Highway 30 in Nebraska between mile markers 402 and
423.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
This is a dangerous storm. Prepare immediately for large destructive
hail capable of producing significant damage. People outside should
move to shelter inside a strong building, and stay away from
windows.
&&
A tornado watch remains in effect until 1000 PM CDT for northeastern
and east central Nebraska.
LAT...LON 4127 9708 4142 9709 4160 9658 4134 9652
TIME...MOT...LOC 2154Z 246DEG 25KT 4136 9703
HAIL...2.75IN
WIND...60MPH
$$
BB2 follow-up statements
535
WWUS53 KOAX 012211 RRA
SVSOAX
Severe Weather Statement
National Weather Service Omaha/Valley Nebraska
511 PM CDT TUE MAY 1 2018
NEC023-037-053-155-012245-
/O.CON.KOAX.SV.W.0021.000000T0000Z-180501T2245Z/
Colfax NE-Dodge NE-Butler NE-Saunders NE-
511 PM CDT TUE MAY 1 2018
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 545 PM CDT
FOR SOUTHEASTERN COLFAX...SOUTHWESTERN DODGE...NORTHEASTERN BUTLER
AND NORTHWESTERN SAUNDERS COUNTIES...
At 509 PM CDT, a severe thunderstorm was located 8 miles northwest
of Prague, or 22 miles east of Columbus, moving northeast at 25 mph.
A tornado warning is also in effect for this storm as it has a
history of producing a funnel cloud.
This is a very dangerous storm.
HAZARD...Baseball size hail and 60 mph wind gusts.
SOURCE...Trained weather spotters reported hail larger than 2
inches 3 miles east of Octavia with this storm.
IMPACT...People and animals outdoors will be severely injured.
Expect shattered windows, extensive damage to roofs,
siding, and vehicles.
Locations impacted include...
North Bend, Cedar Bluffs, Prague, Morse Bluff, Bruno, Rogers,
Linwood, Abie, Camp Eagle, Camp Cedars and Fremont Lakes State
Recreation Area.
This includes Highway 30 in Nebraska between mile markers 402 and
423.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
This is a dangerous storm. Prepare immediately for large destructive
hail capable of producing significant damage. People outside should
move to a shelter, inside a strong building and away from windows.
&&
A tornado watch remains in effect until 1000 PM CDT for northeastern
and east central Nebraska.
LAT...LON 4128 9699 4145 9701 4160 9658 4134 9652
TIME...MOT...LOC 2209Z 246DEG 23KT 4139 9692
HAIL...2.75IN
WIND...60MPH
$$
BB301
WWUS53 KOAX 012229 RRA
SVSOAX
Severe Weather Statement
National Weather Service Omaha/Valley Nebraska
529 PM CDT TUE MAY 1 2018
NEC023-037-012238-
/O.CAN.KOAX.SV.W.0021.000000T0000Z-180501T2245Z/
Colfax NE-Butler NE-
529 PM CDT TUE MAY 1 2018
...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN COLFAX AND
NORTHEASTERN BUTLER COUNTIES IS CANCELLED...
The severe thunderstorm which prompted the warning has moved out of
the warned area. Therefore, the warning has been cancelled.
A tornado watch remains in effect until 1000 PM CDT for northeastern
and east central Nebraska.
LAT...LON 4136 9652 4133 9691 4148 9691 4160 9658
TIME...MOT...LOC 2228Z 237DEG 20KT 4144 9683
$$
NEC053-155-012245-
/O.CON.KOAX.SV.W.0021.000000T0000Z-180501T2245Z/
Dodge NE-Saunders NE-
529 PM CDT TUE MAY 1 2018
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 545 PM CDT
FOR SOUTHWESTERN DODGE AND NORTHWESTERN SAUNDERS COUNTIES...
At 528 PM CDT, a severe thunderstorm was located near North Bend, or
27 miles east of Columbus, moving northeast at 25 mph.
This is a very dangerous storm.
HAZARD...Baseball size hail and 60 mph wind gusts.
SOURCE...Trained weather spotters have reported up to baseball size
hail with this storm near Octavia.
IMPACT...People and animals outdoors will be severely injured.
Expect shattered windows, extensive damage to roofs,
siding, and vehicles.
Locations impacted include...
North Bend, Cedar Bluffs, Morse Bluff, Camp Eagle, Camp Cedars and
Fremont Lakes State Recreation Area.
This includes Highway 30 in Nebraska between mile markers 402 and
423.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
This is a dangerous storm. Prepare immediately for large destructive
hail capable of producing significant damage. People outside should
move to a shelter, inside a strong building and away from windows.
&&
A tornado watch remains in effect until 1000 PM CDT for northeastern
and east central Nebraska.
LAT...LON 4136 9652 4133 9691 4148 9691 4160 9658
TIME...MOT...LOC 2228Z 237DEG 20KT 4144 9683
HAIL...2.75IN
WIND...60MPH
$$
BBThe office that day
Everything else NWS Omaha, NE issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 30, 7:52 PM CDT | Special Weather Statement | OAX | Knox | 23 min |
| Apr 30, 8:02 PM CDT | Severe Thunderstorm Warning | OAX | Knox | 28 min |
| Apr 30, 8:37 PM CDT | Special Weather Statement | OAX | Knox | 38 min |
| Apr 30, 9:32 PM CDT | Special Weather Statement | OAX | Antelope, Cedar, Pierce | 43 min |
| May 1, 1:43 AM CDT | Special Weather Statement | OAX | Wayne | 32 min |
| May 1, 2:25 AM CDT | Special Weather Statement | OAX | Cuming | 20 min |
| May 1, 2:51 AM CDT | Special Weather Statement | OAX | Thurston | 24 min |
| May 1, 3:47 PM CDT | Severe Thunderstorm Warning | OAX | Colfax, Cuming, Dodge, Platte, Stanton | 43 min |
| May 1, 3:58 PM CDT | Severe Thunderstorm Warning | OAX | Butler, Colfax, Platte | 32 min |
| May 1, 4:19 PM CDT | Severe Thunderstorm Warning | OAX | Colfax, Dodge | 29 min |
| May 1, 4:27 PM CDT | Severe Thunderstorm Warning | OAX | Butler, Colfax | 33 min |
| May 1, 4:38 PM CDT | Severe Thunderstorm Warning | OAX | Burt, Cuming, Dodge | 52 min |
| May 1, 5:01 PM CDT | Tornado Warning | OAX | Butler, Saunders | 29 min |
| May 1, 5:02 PM CDT | Severe Thunderstorm Warning | OAX | Butler, Colfax, Platte | 43 min |
| May 1, 5:27 PM CDT | Severe Thunderstorm Warning | OAX | Burt, Dodge, Washington | 48 min |
| May 1, 5:38 PM CDT | Tornado Warning | OAX | Burt, Washington | 17 min |
| May 1, 5:40 PM CDT | Severe Thunderstorm Warning | OAX | Butler, Colfax, Platte | 50 min |
| May 1, 5:42 PM CDT | Severe Thunderstorm Warning | OAX | Dodge, Saunders | 48 min |
| May 1, 5:50 PM CDT | Severe Thunderstorm Warning | OAX | Washington | 40 min |
| May 1, 6:06 PM CDT | Tornado Warning | OAX | Jefferson | 24 min |
| May 1, 6:08 PM CDT | Severe Thunderstorm Warning | OAX | Burt | 52 min |
| May 1, 6:21 PM CDT | Severe Thunderstorm Warning | OAX | Burt, Dodge, Washington | 17 min |
| May 1, 6:28 PM CDT | Severe Thunderstorm Warning | OAX | Butler | 32 min |
| May 1, 6:28 PM CDT | Tornado Warning | OAX | Jefferson | 32 min |
| May 1, 6:56 PM CDT | Tornado Warning | OAX | Gage, Jefferson | 34 min |
| May 1, 6:58 PM CDT | Flash Flood Warning | OAX | Burt, Washington | 2 hr |
Nearby
Severe Thunderstorm Warnings in Nebraska, 2018Every severe thunderstorm warning in 2018
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.