Alert archive / Nebraska / Severe Thunderstorm Warnings in 2015
Severe Thunderstorm Warning 140, NWS Omaha, NE
NWS Omaha, NE issued this severe thunderstorm warning at Jul 24, 2015, 6:24 PM CDT for Cass County, Lancaster County, Otoe County, Nebraska. It was in force for 24 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
- Jul 24, 2015, 6:24 PM CDT (23:24 UTC)
- Expired
- Jul 24, 2015, 6:48 PM CDT
- In force
- 24 min
- Issued by
- NWS Omaha, NE
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 60.0 mph
Counties Cass County, NE, Lancaster County, NE, Otoe County, NE
The radar
The Omaha radar (KOAX), 60 km from the middle of the area, began a volume at 23:24 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
Topeka, KS (KFOE), launched 12:00Z, 11.4 hours before the alert went out and 206 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
- 2454 J/kg
- Mixed-layer CIN
- -114 J/kg
- Mixed-layer LCL
- 981 m above ground
- 0-6 km bulk shear
- 23 kt
- 0-1 km storm-relative helicity
- 93 m²/s²
- 0-3 km storm-relative helicity
- 159 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 Jul 24, 6:14 PM CDT, 10 minutes earlier.
Area forecast discussion, Jul 24, 6:14 PM CDT, 10 minutes before
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</html>Hazardous weather outlook, Jul 24, 4:32 PM CDT, 1 hour 52 minutes before
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE OMAHA/VALLEY NE 432 PM CDT FRI JUL 24 2015 IAZ043-055-056-069-079-080-090-091-NEZ015-033-034-043>045-050>053- 065>068-078-088>093-251145- MONONA-HARRISON-SHELBY-POTTAWATTAMIE-MILLS-MONTGOMERY-FREMONT- PAGE-THURSTON-CUMING-BURT-COLFAX-DODGE-WASHINGTON-BUTLER-SAUNDERS- DOUGLAS-SARPY-SEWARD-LANCASTER-CASS-OTOE-SALINE-JEFFERSON-GAGE- JOHNSON-NEMAHA-PAWNEE-RICHARDSON- 432 PM CDT FRI JUL 24 2015 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF SOUTHWEST IOWA...WEST CENTRAL IOWA...EAST CENTRAL NEBRASKA...NORTHEAST NEBRASKA AND SOUTHEAST NEBRASKA. .DAY ONE...TONIGHT AND SATURDAY A HEAT ADVISORY REMAINS IN EFFECT THROUGH THE EARLY EVENING HOURS WITH HEAT INDICES VALUES RANGING FROM 105 TO 115 DEGREES. SCATTERED THUNDERSTORMS WILL BE POSSIBLE TONIGHT AS WELL AS SATURDAY OVER THE OUTLOOK AREA. STORMS MAINLY ALONG AND SOUTH OF INTERSTATE 80 MAY APPROACH OR BECOME SEVERE THIS EVENING WITH DAMAGING WIND AND LARGE HAIL THE MAIN THREATS. SOME THUNDERSTORMS TONIGHT MAY EVEN CONTAIN HEAVY RAINFALL...ESPECIALLY IN SOUTHEAST NEBRASKA AND SOUTHWEST IOWA. .DAYS TWO THROUGH SEVEN...SATURDAY NIGHT THROUGH THURSDAY THE CHANCE FOR THUNDERSTORMS WILL CONTINUE OVER THE MAJORITY OF THE OUTLOOK AREA THROUGH LATE NEXT WEEK. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION WILL LIKELY NOT BE NEEDED THROUGH SATURDAY. NEZ011-012-016>018-030>032-042-251145- KNOX-CEDAR-ANTELOPE-PIERCE-WAYNE-BOONE-MADISON-STANTON-PLATTE- 432 PM CDT FRI JUL 24 2015 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF NORTHEAST NEBRASKA. .DAY ONE...TONIGHT AND SATURDAY THERE IS A SLIGHT CHANCE OF THUNDERSTORMS MAINLY AFTER MIDNIGHT. STORMS ARE NOT EXPECTED TO BECOME SEVERE...BUT MAY BE ACCOMPANIED BY GUSTY WINDS AND SMALL HAIL. .DAYS TWO THROUGH SEVEN...SATURDAY NIGHT THROUGH THURSDAY THE CHANCE FOR THUNDERSTORMS WILL CONTINUE OVER THE MAJORITY OF THE OUTLOOK AREA THROUGH LATE NEXT WEEK. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION WILL NOT BE NEEDED THROUGH SATURDAY.
The office that day
Everything else NWS Omaha, NE issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 24, 2:36 AM CDT | Special Weather Statement | OAX | Jefferson | 39 min |
| Jul 24, 3:18 AM CDT | Special Weather Statement | OAX | Gage | 42 min |
| Jul 24, 3:28 AM CDT | Severe Thunderstorm Warning | OAX | Gage | 32 min |
| Jul 24, 4:31 AM CDT | Special Weather Statement | OAX | Gage | 44 min |
| Jul 24, 6:39 PM CDT | Special Weather Statement | OAX | Gage, Johnson, Otoe | 51 min |
| Jul 24, 6:54 PM CDT | Special Weather Statement | OAX | Cass | 36 min |
Nearby
Severe Thunderstorm Warnings in Nebraska, 2015Every severe thunderstorm warning in 2015
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.