Alert archive / Nebraska / Severe Thunderstorm Warnings in 2018
Severe Thunderstorm Warning 272, NWS Omaha, NE
NWS Omaha, NE issued this severe thunderstorm warning at Sep 18, 2018, 3:55 PM CDT for Cass County, Sarpy County, Saunders County, Nebraska. It was in force for 35 min. No storm report in the archive falls inside the area while it was in force.
The area
The counties it named.
The facts
- Issued
- Sep 18, 2018, 3:55 PM CDT (20:55 UTC)
- Expired
- Sep 18, 2018, 4:30 PM CDT
- In force
- 35 min
- Issued by
- NWS Omaha, NE
- Area
- Storm-based polygon
- Hail
- 1.5 in
- Wind
- 60.0 mph
Counties Cass County, NE, Sarpy County, NE, Saunders County, NE
The radar
The Omaha radar (KOAX), 27 km from the middle of the area, began a volume at 20:59 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, 8.9 hours before the alert went out and 27 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
- 1380 J/kg
- Mixed-layer CIN
- -109 J/kg
- Mixed-layer LCL
- 1445 m above ground
- 0-6 km bulk shear
- 21 kt
- 0-1 km storm-relative helicity
- -3 m²/s²
- 0-3 km storm-relative helicity
- -25 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
What forecasters said that day
The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Omaha, NE wrote its last area forecast discussion before this severe thunderstorm warning went out at Sep 18, 3:28 PM CDT, 27 minutes earlier.
Area forecast discussion, Sep 18, 3:28 PM CDT, 27 minutes before
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</html>Hazardous weather outlook, Sep 18, 11:36 AM CDT, 4 hours 19 minutes before
Hazardous Weather Outlook National Weather Service Omaha/Valley NE 1136 AM CDT Tue Sep 18 2018 IAZ043-055-056-069-079-080-090-091-NEZ011-012-015>018-030>034- 042>045-050>053-065>068-078-088>093-190645- Monona-Harrison-Shelby-Pottawattamie-Mills-Montgomery-Fremont- Page-Knox-Cedar-Thurston-Antelope-Pierce-Wayne-Boone-Madison- Stanton-Cuming-Burt-Platte-Colfax-Dodge-Washington-Butler- Saunders-Douglas-Sarpy-Seward-Lancaster-Cass-Otoe-Saline- Jefferson-Gage-Johnson-Nemaha-Pawnee-Richardson- 1136 AM CDT Tue Sep 18 2018 This Hazardous Weather Outlook is for portions of southwest Iowa...west central Iowa...east central Nebraska...northeast Nebraska and southeast Nebraska. .DAY ONE...This Afternoon and Tonight Isolated strong to severe thunderstorms are possible north of Interstate 80. There is a marginal risk for severe storms, with isolated one inch hail, gusty winds, and heavy downpours of rain being the main threats. Minor flooding will continue along the Missouri River upstream of Lewis and Clark Lake in Knox County and in the vicinity of Brownsville. .DAYS TWO THROUGH SEVEN...Wednesday through Monday Isolated thunderstorms possible north of Interstate 80 Wednesday, with more widespread thunderstorm activity for all of eastern Nebraska and western Iowa Wednesday night and Thursday. Though the overall risk of severe storms is low over this period, a few stronger storms are possible. Minor flooding will continue along the Missouri River upstream of Lewis and Clark Lake in Knox County. Minor flooding along the Missouri River in the vicinity of Brownsville should subside by Friday. .SPOTTER INFORMATION STATEMENT... Spotter activation is not expected at this time, however local spotters may be needed for locally strong to severe storms. Zapotocny
In the hours before
Special weather statement, Sep 18, 11:28 AM CDT, 4 hours 27 minutes before
Special Weather Statement
National Weather Service Omaha/Valley Nebraska
1128 AM CDT TUE SEP 18 2018
IAZ043-NEZ015-034-181700-
Monona IA-Thurston NE-Burt NE-
1128 AM CDT TUE SEP 18 2018
...SIGNIFICANT WEATHER ADVISORY FOR MONONA...NORTHEASTERN BURT AND
SOUTHEASTERN THURSTON COUNTIES UNTIL NOON CDT...
At 1127 AM CDT, Doppler radar was tracking strong thunderstorms along
a line extending from 3 miles east of Anthon to 3 miles east of
Bancroft. Movement was southeast at 30 mph.
Winds in excess of 40 mph will be possible with these storms along
with heavy downpours of rain..
Locations impacted include...
Onawa, Whiting, Decatur, Macy, Mapleton, Blencoe, Castana, Turin,
Rodney, Lewis And Clark State Park and Kennebec.
LAT...LON 4187 9625 4217 9644 4222 9630 4221 9567
4208 9567
TIME...MOT...LOC 1627Z 300DEG 37KT 4238 9579 4200 9651
ZAPOTOCNYSpecial weather statement, Sep 18, 2:29 PM CDT, 1 hour 26 minutes before
Special Weather Statement
National Weather Service Omaha/Valley Nebraska
229 PM CDT TUE SEP 18 2018
NEZ043-044-050-051-182015-
Saunders NE-Butler NE-Colfax NE-Dodge NE-
229 PM CDT TUE SEP 18 2018
...SIGNIFICANT WEATHER ADVISORY FOR SOUTHEASTERN COLFAX...SOUTHERN
DODGE...NORTHEASTERN BUTLER AND NORTHERN SAUNDERS COUNTIES UNTIL 315
PM CDT...
At 228 PM CDT, Doppler radar was tracking a strong thunderstorm 5
miles southeast of Schuyler, or 19 miles east of Columbus, moving
east at 45 mph.
Dime size hail and winds in excess of 40 mph will be possible with
this storm.
Locations impacted include...
Fremont, Schuyler, Wahoo, North Bend, Cedar Bluffs, Nickerson,
Inglewood, Prague, Morse Bluff, Octavia, Malmo, Leshara, Colon,
Rogers, Linwood, Abie, 7 Miles North Of North Bend, Fremont Lakes
State Recreation Area, Camp Eagle and Camp Cedars.
LAT...LON 4158 9701 4158 9644 4139 9643 4139 9647
4137 9643 4131 9643 4122 9658 4136 9720
TIME...MOT...LOC 1928Z 282DEG 37KT 4140 9698
ZAPOTOCNYLocal storm report, Sep 18, 3:34 PM CDT, 21 minutes before
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</html>The office that day
Everything else NWS Omaha, NE issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 18, 2:29 PM CDT | Special Weather Statement | OAX | Dodge | 46 min |
| Sep 18, 2:54 PM CDT | Severe Thunderstorm Warning | OAX | Saunders | 36 min |
| Sep 18, 3:22 PM CDT | Severe Thunderstorm Warning | OAX | Saunders | 38 min |
| Sep 18, 4:00 PM CDT | Special Weather Statement | OAX | Otoe | 30 min |
| Sep 18, 4:04 PM CDT | Special Weather Statement | OAX | Lancaster | 56 min |
| Sep 18, 4:08 PM CDT | Severe Thunderstorm Warning | OAX | Cass, Lancaster, Sarpy, Saunders | 52 min |
| Sep 18, 4:13 PM CDT | Severe Thunderstorm Warning | OAX | Johnson, Lancaster, Otoe | 32 min |
| Sep 18, 4:25 PM CDT | Severe Thunderstorm Warning | OAX | Cass, Sarpy | 50 min |
| Sep 18, 4:35 PM CDT | Severe Thunderstorm Warning | OAX | Cass, Lancaster, Otoe | 40 min |
| Sep 18, 4:49 PM CDT | Severe Thunderstorm Warning | OAX | Cass, Otoe | 41 min |
| Sep 18, 11:28 AM CDT | Special Weather Statement | OAX | Monona | 32 min |
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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.