Alert archive / Nebraska / Severe Thunderstorm Warnings in 2015
Severe Thunderstorm Warning 142, NWS Omaha, NE
NWS Omaha, NE issued this severe thunderstorm warning at Jul 24, 2015, 7:18 PM CDT for Cass County, Sarpy County, Nebraska; Fremont County, Mills County, Iowa. It was in force for 27 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, 7:18 PM CDT (00:18 UTC)
- Expired
- Jul 24, 2015, 7:45 PM CDT
- In force
- 27 min
- Issued by
- NWS Omaha, NE
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 60.0 mph
Counties Fremont County, IA, Mills County, IA, Cass County, NE, Sarpy County, NE
The radar
The Omaha radar (KOAX), 58 km from the middle of the area, began a volume at 00:19 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 00:00Z, 0.3 hours before the alert went out and 59 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
- 3998 J/kg
- Mixed-layer CIN
- -17 J/kg
- Mixed-layer LCL
- 1338 m above ground
- 0-6 km bulk shear
- 20 kt
- 0-1 km storm-relative helicity
- 5 m²/s²
- 0-3 km storm-relative helicity
- 102 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 5.8
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, 1 hour 4 minutes earlier.
Area forecast discussion, Jul 24, 6:14 PM CDT, 1 hour 4 minutes before
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</html>Hazardous weather outlook, Jul 24, 4:32 PM CDT, 2 hours 46 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.
In the hours before
Special weather statement, Jul 24, 6:39 PM CDT, 39 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE OMAHA/VALLEY NEBRASKA
639 PM CDT FRI JUL 24 2015
NEZ066>068-078-088>092-250030-
JEFFERSON NE-NEMAHA NE-JOHNSON NE-CASS NE-GAGE NE-LANCASTER NE-
SALINE NE-PAWNEE NE-OTOE NE-
639 PM CDT FRI JUL 24 2015
...SIGNIFICANT WEATHER ADVISORY FOR SOUTHEASTERN SALINE...EASTERN
JEFFERSON...SOUTHWESTERN CASS...NORTHWESTERN JOHNSON...NORTHWESTERN
NEMAHA...GAGE...SOUTHEASTERN LANCASTER...NORTHWESTERN PAWNEE AND
WESTERN OTOE COUNTIES UNTIL 730 PM CDT...
AT 638 PM CDT...DOPPLER RADAR WAS TRACKING A LINE OF STRONG
THUNDERSTORMS ALONG A LINE EXTENDING FROM NEAR BENNET TO 6 MILES
SOUTHEAST OF WESTERN...AND MOVING SOUTHEAST AT 20 MPH.
HALF INCH HAIL AND WINDS IN EXCESS OF 40 MPH WILL BE POSSIBLE WITH
THESE STORMS.
LOCATIONS IMPACTED INCLUDE...
BEATRICE...SYRACUSE...WILBER...HICKMAN...WYMORE...BENNET...FIRTH...
PALMYRA...DE WITT...CORTLAND...STERLING...PLYMOUTH...BLUE SPRINGS...
COOK...UNADILLA...ODELL...DILLER...PANAMA...TALMAGE AND CLATONIA.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
THESE STORMS MAY INTENSIFY...SO BE CERTAIN TO MONITOR LOCAL RADIO AND
TV STATIONS...AS WELL AS LOCAL CABLE TV OUTLETS...FOR ADDITIONAL
INFORMATION AND POSSIBLE WARNINGS FROM THE NATIONAL WEATHER SERVICE.
TO REPORT SEVERE WEATHER...CONTACT YOUR NEAREST LAW ENFORCEMENT
AGENCY. THEY WILL RELAY YOUR REPORT TO THE NATIONAL WEATHER SERVICE
OFFICE IN OMAHA.
IF ON A LAKE...GET OUT OF THE WATER AND MOVE INDOORS OR INSIDE A
VEHICLE. REMEMBER...LIGHTNING CAN STRIKE OUT TO 15 MILES FROM THE
PARENT THUNDERSTORM. IF YOU CAN HEAR THUNDER...YOU ARE CLOSE ENOUGH
TO BE STRUCK BY LIGHTNING. MOVE TO SAFE SHELTER NOW. DO NOT BE
CAUGHT ON THE WATER IN A THUNDERSTORM.
&&
LAT...LON 4000 9692 4031 9724 4079 9646 4057 9595
4000 9683
TIME...MOT...LOC 2338Z 311DEG 19KT 4074 9648 4032 9712
DEESpecial weather statement, Jul 24, 6:54 PM CDT, 24 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE OMAHA/VALLEY NEBRASKA 654 PM CDT FRI JUL 24 2015 IAZ079-090-NEZ053-067-068-250030- FREMONT IA-MILLS IA-CASS NE-OTOE NE-SARPY NE- 654 PM CDT FRI JUL 24 2015 ...SIGNIFICANT WEATHER ADVISORY FOR SOUTHWESTERN MILLS...NORTHWESTERN FREMONT...CASS...NORTHWESTERN OTOE AND SOUTHWESTERN SARPY COUNTIES UNTIL 730 PM CDT... AT 654 PM CDT...DOPPLER RADAR WAS TRACKING A LINE OF STRONG THUNDERSTORMS ALONG A LINE EXTENDING FROM NEAR MURDOCK TO NEAR PALMYRA...AND MOVING SOUTHEAST AT 15 MPH. HALF INCH HAIL AND WINDS IN EXCESS OF 40 MPH WILL BE POSSIBLE WITH THESE STORMS. LOCATIONS IMPACTED INCLUDE... LOUISVILLE...WEEPING WATER...ELMWOOD...MURRAY...AVOCA...UNION... NEHAWKA...DUNBAR...MANLEY...OTOE...LOUISVILLE STATE RECREATION AREA AND CAMP CATRON. PRECAUTIONARY/PREPAREDNESS ACTIONS... TO REPORT SEVERE WEATHER...CONTACT YOUR NEAREST LAW ENFORCEMENT AGENCY. THEY WILL RELAY YOUR REPORT TO THE NATIONAL WEATHER SERVICE OFFICE IN OMAHA. && LAT...LON 4092 9579 4058 9596 4078 9642 4101 9619 TIME...MOT...LOC 2354Z 302DEG 13KT 4096 9623 4078 9638 DEE
The office that day
Everything else NWS Omaha, NE issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 24, 7:03 PM CDT | Severe Thunderstorm Warning | OAX | Cass, Sarpy | 16 min |
| Jul 24, 7:37 PM CDT | Special Weather Statement | OAX | Gage, Johnson, Otoe | 23 min |
| Jul 24, 7:46 PM CDT | Severe Thunderstorm Warning | OAX | Cass | 29 min |
| Jul 24, 8:00 PM CDT | Special Weather Statement | OAX | Gage, Pawnee | 45 min |
| Jul 24, 8:02 PM CDT | Severe Thunderstorm Warning | OAX | Gage | 28 min |
| Jul 24, 8:20 PM CDT | Special Weather Statement | OAX | Nemaha, Richardson | 40 min |
| Jul 24, 8:34 PM CDT | Special Weather Statement | OAX | Gage | 41 min |
| Jul 24, 11:28 PM CDT | Severe Thunderstorm Warning | OAX | Butler, Gage, Jefferson, Lancaster, Saline, Saunders and 1 more | 47 min |
| Jul 25, 12:06 AM CDT | Severe Thunderstorm Warning | OAX | Cass, Lancaster, Otoe | 39 min |
| Jul 25, 12:18 AM CDT | Severe Thunderstorm Warning | OAX | Butler, Lancaster, Saunders, Seward | 27 min |
| Jul 25, 12:49 AM CDT | Special Weather Statement | OAX | Cass, Lancaster, Otoe, Sarpy, Saunders | 41 min |
| Jul 25, 1:25 AM CDT | Special Weather Statement | OAX | Nemaha, Richardson | 35 min |
| Jul 25, 2:07 AM CDT | Special Weather Statement | OAX | Richardson | 23 min |
| Jul 25, 2:48 PM CDT | Heat Advisory | OAX | Burt, Butler, Cass, Dodge, Douglas, Gage and 12 more | 28 hr |
| Jul 24, 7:42 PM CDT | Special Weather Statement | OAX | Mills | 33 min |
| Jul 24, 7:49 PM CDT | Severe Thunderstorm Warning | OAX | Mills, Montgomery, Pottawattamie | 26 min |
| Jul 24, 8:16 PM CDT | Special Weather Statement | OAX | Fremont, Montgomery, Page | 44 min |
| Jul 25, 1:58 AM CDT | Special Weather Statement | OAX | Montgomery, Page | 32 min |
| Jul 25, 2:05 AM CDT | Severe Thunderstorm Warning | OAX | Fremont, Montgomery, Page | 25 min |
| Jul 25, 2:31 AM CDT | Severe Thunderstorm Warning | OAX | Montgomery, Page | 29 min |
Nearby
Severe Thunderstorm Warnings in Nebraska, 2015Severe Thunderstorm Warnings in Iowa, 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.