Alert archive / Nebraska / Severe Thunderstorm Warnings in 2016

Severe Thunderstorm Warning 174, NWS Omaha, NE

July 7, 2016Burt County, Thurston County, Nebraska; Monona County, Iowa

NWS Omaha, NE issued this severe thunderstorm warning at Jul 7, 2016, 4:01 PM CDT for Burt County, Thurston County, Nebraska; Monona County, Iowa. It was in force for 44 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 7, 2016, 4:01 PM CDT (21:01 UTC)
Expired: Jul 7, 2016, 4:45 PM CDT
In force: 44 min
Issued by: NWS Omaha, NE
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Monona County, IA, Burt County, NE, Thurston County, NE

The radar

The Omaha radar (KOAX), 78 km from the middle of the area, began a volume at 21:03 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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Jul 7, 3:54 PM CDT	Severe Thunderstorm Watch	SPC	5 hr

The nearest sounding before it

Omaha, NE (KOAX), launched 12:00Z, 9.0 hours before the alert went out and 78 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.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 7 J/kg
Mixed-layer CIN: -552 J/kg
Mixed-layer LCL: 778 m above ground
0-6 km bulk shear: 42 kt
0-1 km storm-relative helicity: -269 m²/s²
0-3 km storm-relative helicity: -234 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

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 7, 3:14 PM CDT, 47 minutes earlier.

Area forecast discussion, Jul 7, 3:14 PM CDT, 47 minutes before

Area Forecast Discussion
National Weather Service Omaha/Valley NE
314 PM CDT THU JUL 7 2016

.SHORT TERM...(tonight through Sunday)
Issued at 314 PM CDT Thu Jul 7 2016

Early afternoon water vapor imagery shows a progressive short-wave
trough over the western Dakotas with a belt of enhanced (40-50+
kt) mid-level flow accompanying this system over South Dakota and
the northern half of Nebraska. This upper-air system will
translate east into the upper Great Lakes by Friday with
rebounding mid-level heights over the northern High Plains. At
the surface, an associated cold front stretching from southwest
Minnesota through central Nebraska as of 19z will advance
southeast into the lower Missouri Valley tonight into Friday
morning.

Though low-level winds have veered to westerly ahead of the cold
front over eastern Nebraska this afternoon, sufficient convergence
along the boundary (likely augmented by the glancing influence of
the Dakotas short-wave trough) has resulted in a broken band of
thunderstorms over northeast Nebraska as of 20z. Strong daytime
heating and a gradually moistening boundary layer in the wake of
last night's MCS are supporting destabilization within the warm
sector with MLCAPE estimated in the 1000-2000 J/kg range as of mid
afternoon. The modest convergence along the front and weakening
large-scale forcing for ascent with southward extent cast
uncertainty on storm coverage through the remainder of the
afternoon into evening. Current thinking is that greatest storm
coverage will exist across northern and possibly eastern portions
of the CWA, in line with latest near-term guidance.

Strengthening flow aloft will compensate for the veered low-level
winds with sufficient deep-layer shear for organized storm modes
and an attendant risk for mainly large hail and damaging winds.
Expect the severe weather threat and precipitation chances to
diminish from northwest to southeast through the remainder of the
afternoon into tonight.

As mentioned above, mid-level heights will build over the north-
central U.S. Friday and Saturday ahead of the next short-wave
trough moving through the Pacific Northwest into northern Rockies.
Outside of a slight chance of thunderstorms over southeast
Nebraska Friday night into early Saturday, it appears that we will
see dry conditions Friday through the weekend. High temperatures
will be near seasonal normals in the mid to upper 80s.

.LONG TERM...(Sunday night through Thursday)
Issued at 314 PM CDT Thu Jul 7 2016

The 12z runs of the deterministic ECMWF and GFS and GEFS mean
remain in reasonably good agreement in the progression of the
northern Rockies upper low into south-central Canada by Monday
night. Meanwhile, the associated cold front will advance southeast
into the mid Missouri Valley Monday into Monday night where it
will become quasi-stationary through the remainder of the extended
period. Highest precipitation chances will be Monday evening into
Monday night with some severe weather possible. Thereafter, low
chance POPs will continue into the middle of next week owing to
the proximity of the boundary in the area. Near-normal
temperatures will continue.

&&

.AVIATION...(18Z TAFS for KOMA...KLNK...KOFK through 18Z Friday)
Issued at 1229 PM CDT Thu Jul 7 2016

VFR conditions through the period. Could see thunderstorms at KOFK
21-23z...and KOMA 23-02z.

&&

.OAX Watches/Warnings/Advisories...
NE...None.
IA...None.
&&

SHORT TERM...Mead
LONG TERM...Mead
AVIATION...DeWald

Hazardous weather outlook, Jul 7, 12:28 PM CDT, 3 hours 33 minutes before

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In the hours before

Special weather statement, Jul 7, 1:34 PM CDT, 2 hours 27 minutes before

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Special weather statement, Jul 7, 2:26 PM CDT, 1 hour 35 minutes before

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Special weather statement, Jul 7, 3:14 PM CDT, 47 minutes before

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Special weather statement, Jul 7, 3:38 PM CDT, 23 minutes before

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Local storm report, Jul 7, 3:40 PM CDT, 21 minutes before

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Local storm report, Jul 7, 3:47 PM CDT, 14 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE OMAHA/VALLEY NEBRASKA
347 PM CDT THU JUL 07 2016

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0344 PM     HAIL             2 ENE WISNER            42.00N 96.87W
07/07/2016  M1.00 INCH       CUMING             NE   STORM CHASER

&&

VDEWALD

The office that day

Everything else NWS Omaha, NE issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jul 6, 8:31 PM CDT	Special Weather Statement	OAX	Knox	59 min
Jul 6, 8:57 PM CDT	Severe Thunderstorm Warning	OAX	Knox	48 min
Jul 6, 9:24 PM CDT	Severe Thunderstorm Warning	OAX	Antelope, Knox	51 min
Jul 6, 9:39 PM CDT	Severe Thunderstorm Warning	OAX	Cedar, Knox	51 min
Jul 6, 10:08 PM CDT	Severe Thunderstorm Warning	OAX	Antelope, Knox, Pierce	52 min
Jul 6, 10:12 PM CDT	Severe Thunderstorm Warning	OAX	Antelope, Madison, Pierce	63 min
Jul 6, 10:18 PM CDT	Severe Thunderstorm Warning	OAX	Antelope	27 min
Jul 6, 10:24 PM CDT	Severe Thunderstorm Warning	OAX	Cedar, Wayne	51 min
Jul 6, 10:53 PM CDT	Severe Thunderstorm Warning	OAX	Antelope, Boone	37 min
Jul 6, 10:56 PM CDT	Severe Thunderstorm Warning	OAX	Cuming, Stanton, Thurston, Wayne	49 min
Jul 6, 11:31 PM CDT	Severe Thunderstorm Warning	OAX	Burt, Cuming, Thurston	59 min
Jul 6, 11:31 PM CDT	Severe Thunderstorm Warning	OAX	Boone, Madison, Platte	29 min
Jul 6, 11:58 PM CDT	Severe Thunderstorm Warning	OAX	Butler, Colfax, Dodge, Platte, Saunders	32 min
Jul 6, 11:59 PM CDT	Severe Thunderstorm Warning	OAX	Colfax, Cuming, Dodge, Platte, Stanton	31 min
Jul 7, 12:25 AM CDT	Special Weather Statement	OAX	Burt	50 min
Jul 7, 12:41 AM CDT	Special Weather Statement	OAX	Dodge, Douglas, Sarpy, Saunders, Washington	34 min
Jul 7, 1:04 AM CDT	Severe Thunderstorm Warning	OAX	Butler, Lancaster, Saunders, Seward	41 min
Jul 7, 1:12 AM CDT	Special Weather Statement	OAX	Cass, Douglas, Sarpy	48 min
Jul 7, 1:34 AM CDT	Severe Thunderstorm Warning	OAX	Butler, Lancaster, Saline, Saunders, Seward	41 min
Jul 7, 1:38 AM CDT	Severe Thunderstorm Warning	OAX	Cass, Lancaster, Sarpy, Saunders	37 min
Jul 7, 2:02 AM CDT	Severe Thunderstorm Warning	OAX	Cass, Douglas, Sarpy	43 min
Jul 7, 2:17 AM CDT	Special Weather Statement	OAX	Lancaster, Otoe	43 min
Jul 7, 2:28 AM CDT	Special Weather Statement	OAX	Gage, Johnson, Pawnee	47 min
Jul 7, 2:35 AM CDT	Severe Thunderstorm Warning	OAX	Cass, Otoe	40 min
Jul 7, 2:44 AM CDT	Severe Thunderstorm Warning	OAX	Johnson, Nemaha, Otoe	50 min
Jul 7, 2:52 AM CDT	Severe Thunderstorm Warning	OAX	Johnson, Nemaha, Pawnee, Richardson	53 min
Jul 7, 3:13 AM CDT	Severe Thunderstorm Warning	OAX	Otoe	62 min
Jul 7, 1:03 PM CDT	Special Weather Statement	OAX	Platte	27 min
Jul 7, 1:34 PM CDT	Special Weather Statement	OAX	Antelope	26 min
Jul 7, 1:45 PM CDT	Severe Thunderstorm Warning	OAX	Antelope, Pierce	45 min
Jul 7, 2:26 PM CDT	Special Weather Statement	OAX	Pierce	34 min
Jul 7, 3:14 PM CDT	Special Weather Statement	OAX	Wayne	31 min
Jul 7, 3:38 PM CDT	Special Weather Statement	OAX	Thurston	37 min
Jul 7, 3:45 PM CDT	Severe Thunderstorm Warning	OAX	Cuming, Thurston	30 min
Jul 7, 6:16 PM CDT	Special Weather Statement	OAX	Sarpy	14 min
Jul 7, 12:22 AM CDT	Special Weather Statement	OAX	Harrison	23 min
Jul 7, 1:53 AM CDT	Special Weather Statement	OAX	Shelby	37 min
Jul 7, 2:57 AM CDT	Special Weather Statement	OAX	Mills, Montgomery, Page	33 min
Jul 7, 4:39 PM CDT	Severe Thunderstorm Warning	OAX	Monona	51 min
Jul 7, 5:12 PM CDT	Severe Thunderstorm Warning	OAX	Harrison	48 min
Jul 7, 5:57 PM CDT	Special Weather Statement	OAX	Shelby	33 min
Jul 7, 6:00 PM CDT	Severe Thunderstorm Warning	OAX	Shelby	29 min
Jul 7, 6:27 PM CDT	Special Weather Statement	OAX	Shelby	33 min

Nearby

Severe Thunderstorm Warnings in Nebraska, 2016 Severe Thunderstorm Warnings in Iowa, 2016 Every severe thunderstorm warning in 2016

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.