Alert archive / Nebraska / Severe Thunderstorm Warnings in 2018

Severe Thunderstorm Warning 187, NWS Omaha, NE

June 30, 2018Antelope County, Knox County, Pierce County, Nebraska

NWS Omaha, NE issued this severe thunderstorm warning at Jun 30, 2018, 2:57 AM CDT for Antelope County, Knox County, Pierce County, Nebraska. It was in force for 33 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
Jun 30, 2018, 2:57 AM CDT (07:57 UTC)
Expired
Jun 30, 2018, 3:30 AM CDT
In force
33 min
Issued by
NWS Omaha, NE
Area
Storm-based polygon
Hail
1.5 in
Wind
60.0 mph

Counties Antelope County, NE, Knox County, NE, Pierce County, NE

The radar

The Sioux Falls radar (KFSD), 164 km from the middle of the area, began a volume at 07:58 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, 8.0 hours before the alert went out and 169 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-pSkew-T log-p diagram, Omaha, NE at 00:00Z on 2018-06-30Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1653 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Omaha, NE at 00:00Z on 2018-06-30The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 110 square meters per square second.193958Sfc1 km3 km6 km9 kmRMLM
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
1653 J/kg
Mixed-layer CIN
-235 J/kg
Mixed-layer LCL
2436 m above ground
0-6 km bulk shear
13 kt
0-1 km storm-relative helicity
110 m²/s²
0-3 km storm-relative helicity
235 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.5

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 Jun 30, 2:48 AM CDT, 9 minutes earlier.

Area forecast discussion, Jun 30, 2:48 AM CDT, 9 minutes before
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Hazardous weather outlook, Jun 29, 4:25 PM CDT, 10 hours 32 minutes before
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In the hours before

Special weather statement, Jun 30, 2:18 AM CDT, 39 minutes before
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The office that day

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

IssuedProductOfficeCountiesLasted
Jun 30, 2:18 AM CDTSpecial Weather StatementOAXAntelope42 min
Jun 30, 3:09 AM CDTFlash Flood WatchOAXBurt, Cass, Cuming, Dodge, Douglas, Lancaster and 5 more25 hr
Jun 30, 4:21 AM CDTSevere Thunderstorm WarningOAXCedar, Knox, Pierce, Wayne24 min
Jun 30, 4:43 AM CDTSpecial Weather StatementOAXCedar47 min
Jun 30, 5:28 AM CDTSpecial Weather StatementOAXCedar32 min
Jun 30, 9:02 AM CDTSpecial Weather StatementOAXBurt43 min
Jun 30, 4:12 PM CDTSevere Thunderstorm WarningOAXNemaha, Otoe33 min
Jun 30, 4:43 PM CDTSevere Thunderstorm WarningOAXNemaha, Otoe47 min
Jun 30, 5:06 PM CDTRiver Flood AdvisoryOAXWashington7 days
Jun 30, 5:06 PM CDTRiver Flood AdvisoryOAXDouglas, Sarpy7 days
Jun 30, 5:10 PM CDTSevere Thunderstorm WarningOAXCass, Otoe35 min
Jun 30, 5:21 PM CDTSevere Thunderstorm WarningOAXPawnee39 min
Jun 30, 5:32 PM CDTSpecial Weather StatementOAXSaline28 min
Jun 30, 5:38 PM CDTSevere Thunderstorm WarningOAXSaline, Seward37 min
Jun 30, 5:50 PM CDTTornado WarningOAXSaline40 min
Jun 30, 6:12 PM CDTSevere Thunderstorm WarningOAXSaline, Seward48 min
Jun 30, 6:15 PM CDTSevere Thunderstorm WarningOAXJohnson, Otoe7 min
Jun 30, 6:20 PM CDTSpecial Weather StatementOAXCass, Sarpy25 min
Jun 30, 6:38 PM CDTSevere Thunderstorm WarningOAXCass, Lancaster, Otoe37 min
Jun 30, 6:42 PM CDTSevere Thunderstorm WarningOAXRichardson33 min
Jun 30, 6:50 PM CDTSevere Thunderstorm WarningOAXDouglas, Sarpy25 min
Jun 30, 6:53 PM CDTSevere Thunderstorm WarningOAXCass, Otoe37 min
Jun 30, 10:26 AM CDTSpecial Weather StatementOAXMonona49 min
Jun 30, 3:46 PM CDTSpecial Weather StatementOAXHarrison29 min
Jun 30, 4:07 PM CDTTornado WarningOAXHarrison, Shelby23 min
Jun 30, 4:29 PM CDTSevere Thunderstorm WarningOAXHarrison, Shelby31 min
Jun 30, 5:44 PM CDTSevere Thunderstorm WarningOAXMills31 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.