Alert archive / Nebraska / Severe Thunderstorm Warnings in 2006

Severe Thunderstorm Warning 236, NWS Omaha, NE

June 16, 2006Knox County, Nebraska

NWS Omaha, NE issued this severe thunderstorm warning at Jun 16, 2006, 2:26 PM CDT for Knox County, Nebraska. It was in force for 49 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 16, 2006, 2:26 PM CDT (19:26 UTC)
Expired
Jun 16, 2006, 3:15 PM CDT
In force
49 min
Issued by
NWS Omaha, NE
Area
Counties, with a storm outline in the text

County Knox County, NE

The radar

The Sioux Falls radar (KFSD), 142 km from the middle of the area, began a volume at 19:26 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.

IssuedProductOfficeLasted
Jun 16, 1:30 PM CDTSevere Thunderstorm WatchSPC6 hr

The nearest sounding before it

Omaha, NE (KOAX), launched 12:00Z, 7.4 hours before the alert went out and 193 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 12:00Z on 2006-06-16Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 97 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 12:00Z on 2006-06-16The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 70 square meters per square second.19395878Sfc1 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
97 J/kg
Mixed-layer CIN
-116 J/kg
Mixed-layer LCL
1339 m above ground
0-6 km bulk shear
35 kt
0-1 km storm-relative helicity
70 m²/s²
0-3 km storm-relative helicity
97 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.1

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 16, 4:40 AM CDT, 9 hours 46 minutes earlier.

Area forecast discussion, Jun 16, 4:40 AM CDT, 9 hours 46 minutes before
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Hazardous weather outlook, Jun 16, 12:27 PM CDT, 1 hour 59 minutes before
HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE OMAHA/VALLEY NE
1227 PM CDT FRI JUN 16 2006

IAZ043-055-056-069-079-080-090-091-NEZ011-012-015>018-030>034-
042>045-050>053-065>068-078-088>093-162300-
ANTELOPE-BOONE-BURT-BUTLER-CASS-CEDAR-COLFAX-CUMING-DODGE-DOUGLAS-
FREMONT IA-GAGE-HARRISON IA-JEFFERSON-JOHNSON-KNOX-LANCASTER-MADISON-
MILLS IA-MONONA IA-MONTGOMERY IA-NEMAHA-OTOE-PAGE IA-PAWNEE-PIERCE-
PLATTE-POTTAWATTAMIE IA-RICHARDSON-SALINE-SARPY-SAUNDERS-SEWARD-
SHELBY IA-STANTON-THURSTON-WASHINGTON-WAYNE-
1227 PM CDT FRI JUN 16 2006

THIS HAZARDOUS WEATHER OUTLOOK IS FOR EASTERN NEBRASKA AND
SOUTHWEST IOWA.

.DAY ONE...THIS AFTERNOON AND TONIGHT

ISOLATED SEVERE THUNDERSTORMS ARE POSSIBLE LATER THIS AFTERNOON AND
THIS EVENING.  THE PRIMARY SEVERE WEATHER THREAT WILL BE DAMAGING
WINDS AND LARGE HAIL. WARM...MOIST AIR WILL CONTINUE TO STREAM
NORTHWARD INTO THE AREA THIS AFTERNOON AND TONIGHT.  THIS WILL
CREATE A MODERATELY UNSTABLE AIR MASS ACROSS THE REGION.  A WEAK
FRONTAL BOUNDARY EXTENDS FROM SOUTHEASTERN SOUTH DAKOTA INTO
SOUTHWESTERN NEBRASKA. THUNDERSTORMS ARE EXPECTED TO CONTINUE
DEVELOPING ALONG THIS BOUNDARY AS IT MOVES INTO EASTERN
NEBRASKA THIS AFTERNOON AND TONIGHT.  THESE STORMS WILL ALSO BE SLOW
MOVING WHICH WILL ALLOW FOR LOCALLY HEAVY RAINFALL TO OCCUR.

.DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY

THUNDERSTORMS ARE POSSIBLE THROUGHOUT THE REMAINDER OF THE
WEEKEND...ESPECIALLY OVER SOUTHEAST NEBRASKA AND SOUTHWEST IOWA.
AT THIS TIME...IT APPEARS INSTABILITY WILL BE LIMITED TO
ALLOW FOR SEVERE STORMS.

THERE WILL ALSO BE DAILY CHANCES FOR THUNDERSTORMS IN THE MIDDLE
AND LATER PARTS OF NEXT WEEK.  IT IS TOO SOON TO DETERMINE THE
CHANCES FOR SEVERE WEATHER WITH THESE STORMS.

.SPOTTER INFORMATION STATEMENT...

STORM SPOTTER ACTIVATION MAY BE NEEDED LATE THIS AFTERNOON AND THIS
EVENING.

SMITH

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 16, 4:13 PM CDTSevere Thunderstorm WarningOAXPlatte32 min
Jun 16, 4:15 PM CDTSevere Thunderstorm WarningOAXColfax45 min
Jun 16, 4:40 PM CDTSevere Thunderstorm WarningOAXCuming, Stanton35 min
Jun 16, 6:58 PM CDTSevere Thunderstorm WarningOAXCuming, Stanton32 min

Nearby

Severe Thunderstorm Warnings in Nebraska, 2006Every severe thunderstorm warning in 2006

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.