Alert archive / Nebraska / Special Weather Statements in 2016

Special Weather Statement, NWS Omaha, NE

September 7, 2016Cedar County, Nebraska

NWS Omaha, NE issued this special weather statement at Sep 7, 2016, 1:07 AM CDT for Cedar County, Nebraska. It was in force for 23 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued
Sep 7, 2016, 1:07 AM CDT (06:07 UTC)
Expired
Sep 7, 2016, 1:30 AM CDT
In force
23 min
Issued by
NWS Omaha, NE

County Cedar County, NE

The radar

The Sioux Falls radar (KFSD), 124 km from the middle of the area, began a volume at 06:10 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, 6.1 hours before the alert went out and 176 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 2016-09-07Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2597 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 2016-09-07The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 72 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
2597 J/kg
Mixed-layer CIN
-10 J/kg
Mixed-layer LCL
1252 m above ground
0-6 km bulk shear
37 kt
0-1 km storm-relative helicity
72 m²/s²
0-3 km storm-relative helicity
116 m²/s²
Significant tornado parameter
1.5
Supercell composite
9.8

Open this sounding in Storm Lab

The text

As transmitted.

472 
WWUS83 KOAX 070607
SPSOAX

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE OMAHA/VALLEY NEBRASKA
107 AM CDT WED SEP 7 2016
 
NEZ011-012-070630-
KNOX NE-CEDAR NE-
107 AM CDT WED SEP 7 2016

...SIGNIFICANT WEATHER ADVISORY FOR NORTHWESTERN CEDAR AND
SOUTHEASTERN KNOX COUNTIES UNTIL 130 AM CDT...

AT 107 AM CDT...DOPPLER RADAR WAS TRACKING A STRONG THUNDERSTORM
NEAR BLOOMFIELD...OR 18 MILES SOUTHWEST OF LEWIS AND CLARK STATE
RECREATION AREA...MOVING NORTHEAST AT 30 MPH.

NICKEL SIZE HAIL AND WIND GUSTS UP TO 50 MPH WILL BE POSSIBLE WITH
THIS STORM.

LOCATIONS IMPACTED INCLUDE...
BLOOMFIELD...CROFTON...PLEASANT VALLEY AND FORDYCE. 

THIS INCLUDES HIGHWAY 81 IN NEBRASKA BETWEEN MILEMARKERS 197 AND 212.
 
LAT...LON 4252 9766 4269 9775 4284 9739 4266 9722
TIME...MOT...LOC 0607Z 240DEG 26KT 4262 9768 

$$

MEAD

The office that day

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

IssuedProductOfficeCountiesLasted
Sep 6, 7:22 PM CDTSpecial Weather StatementOAXWashington23 min
Sep 6, 7:43 PM CDTSpecial Weather StatementOAXWashington47 min
Sep 6, 8:01 PM CDTSpecial Weather StatementOAXWashington29 min
Sep 7, 1:21 AM CDTFlash Flood WarningOAXCedar, Knox114 min
Sep 7, 2:09 AM CDTFlash Flood WarningOAXAntelope, Cedar, Knox3 hr
Sep 7, 4:58 PM CDTSpecial Weather StatementOAXRichardson47 min
Sep 7, 6:13 PM CDTSpecial Weather StatementOAXRichardson47 min

Nearby

Special Weather Statements in Nebraska, 2016Every special weather statement 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.