Alert archive / Nebraska / Special Weather Statements in 2015

Special Weather Statement, NWS Omaha, NE

August 9, 2015Knox County, Nebraska

NWS Omaha, NE issued this special weather statement at Aug 9, 2015, 3:39 PM CDT for Knox County, Nebraska. It was in force for 36 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: Aug 9, 2015, 3:39 PM CDT (20:39 UTC)
Expired: Aug 9, 2015, 4:15 PM CDT
In force: 36 min
Issued by: NWS Omaha, NE

County Knox County, NE

The radar

The Sioux Falls radar (KFSD), 120 km from the middle of the area, began a volume at 20:42 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 12:00Z, 8.7 hours before the alert went out and 202 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: 1483 J/kg
Mixed-layer CIN: -85 J/kg
Mixed-layer LCL: 791 m above ground
0-6 km bulk shear: 23 kt
0-1 km storm-relative helicity: -15 m²/s²
0-3 km storm-relative helicity: 14 m²/s²
Significant tornado parameter: -0.0
Supercell composite: -0.2

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

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What forecasters said that day

The local office's own words before this special weather statement 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 special weather statement went out at Aug 9, 3:36 PM CDT, 3 minutes earlier.

Area forecast discussion, Aug 9, 3:36 PM CDT, 3 minutes before

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Hazardous weather outlook, Aug 9, 11:54 AM CDT, 3 hours 45 minutes before

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In the hours before

Local storm report, Aug 9, 12:44 PM CDT, 2 hours 55 minutes before

PRELIMINARY LOCAL STORM REPORT...SUMMARY
NATIONAL WEATHER SERVICE OMAHA/VALLEY NEBRASKA
1244 PM CDT SUN AUG 09 2015

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

0700 AM     HEAVY RAIN       3 W OAKLAND             41.31N 95.45W
08/09/2015  M1.25 INCH       POTTAWATTAMIE      IA   PUBLIC

0700 AM     HEAVY RAIN       OMAHA                   41.26N 96.01W
08/09/2015  M1.16 INCH       DOUGLAS            NE   ASOS

0700 AM     HEAVY RAIN       1 N OMAHA               41.28N 96.01W
08/09/2015  M1.04 INCH       DOUGLAS            NE   PUBLIC

            REPORTED IN FLORANCE.

0700 AM     HEAVY RAIN       2 SW SHUBERT            40.22N 95.71W
08/09/2015  M2.19 INCH       RICHARDSON         NE   CO-OP OBSERVER

0700 AM     HEAVY RAIN       1 SW PLATTSMOUTH        41.00N 95.90W
08/09/2015  M4.03 INCH       CASS               NE   COCORAHS

0700 AM     HEAVY RAIN       1 WSW PAPILLION         41.15N 96.06W
08/09/2015  M2.16 INCH       SARPY              NE   COCORAHS

0700 AM     HEAVY RAIN       1 SSE SIDNEY            40.73N 95.64W
08/09/2015  M5.24 INCH       FREMONT            IA   CO-OP OBSERVER

0700 AM     HEAVY RAIN       2 SSE ELKHORN           41.26N 96.22W
08/09/2015  M1.35 INCH       DOUGLAS            NE   COCORAHS

0700 AM     HEAVY RAIN       3 E CERESCO             41.06N 96.59W
08/09/2015  M1.31 INCH       SAUNDERS           NE   COCORAHS

0700 AM     HEAVY RAIN       4 NNE ELK CREEK         40.34N 96.10W
08/09/2015  M1.10 INCH       JOHNSON            NE   COCORAHS

0700 AM     HEAVY RAIN       SHENANDOAH              40.76N 95.37W
08/09/2015  M3.27 INCH       PAGE               IA   CO-OP OBSERVER

0700 AM     HEAVY RAIN       PAPILLION               41.16N 96.04W
08/09/2015  M1.18 INCH       SARPY              NE   CO-OP OBSERVER

0700 AM     HEAVY RAIN       4 WNW BELLEVUE          41.18N 95.99W
08/09/2015  M2.11 INCH       SARPY              NE   COCORAHS

0700 AM     HEAVY RAIN       3 W COLLEGE SPRINGS     40.62N 95.18W
08/09/2015  M2.95 INCH       PAGE               IA   PUBLIC

0800 AM     HEAVY RAIN       RANDOLPH                40.87N 95.56W
08/09/2015  M6.85 INCH       FREMONT            IA   CO-OP OBSERVER

0800 AM     HEAVY RAIN       2 WSW RANDOLPH          40.86N 95.60W
08/09/2015  M9.30 INCH       FREMONT            IA   PUBLIC

&&

LANDSVORK

Special weather statement, Aug 9, 2:43 PM CDT, 56 minutes before

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Special weather statement, Aug 9, 3:31 PM CDT, 8 minutes before

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Special weather statement, Aug 9, 3:39 PM CDT, 0 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 8, 8:01 PM CDT	Special Weather Statement	OAX	Nemaha	44 min
Aug 8, 8:38 PM CDT	Severe Thunderstorm Warning	OAX	Nemaha	52 min
Aug 8, 8:57 PM CDT	Tornado Warning	OAX	Nemaha, Richardson	33 min
Aug 8, 9:02 PM CDT	Severe Thunderstorm Warning	OAX	Nemaha	28 min
Aug 8, 9:18 PM CDT	Severe Thunderstorm Warning	OAX	Johnson, Nemaha	27 min
Aug 8, 9:25 PM CDT	Tornado Warning	OAX	Johnson, Nemaha	35 min
Aug 8, 9:31 PM CDT	Severe Thunderstorm Warning	OAX	Nemaha, Richardson	29 min
Aug 8, 10:00 PM CDT	Severe Thunderstorm Warning	OAX	Nemaha, Richardson	45 min
Aug 8, 10:13 PM CDT	Areal Flood Advisory	OAX	Johnson, Nemaha, Pawnee, Richardson	3 hr
Aug 8, 10:16 PM CDT	Severe Thunderstorm Warning	OAX	Richardson	29 min
Aug 8, 10:27 PM CDT	Severe Thunderstorm Warning	OAX	Richardson	18 min
Aug 8, 10:33 PM CDT	Tornado Warning	OAX	Richardson	27 min
Aug 8, 10:45 PM CDT	Severe Thunderstorm Warning	OAX	Richardson	30 min
Aug 8, 11:24 PM CDT	Special Weather Statement	OAX	Cass	51 min
Aug 9, 12:04 AM CDT	Areal Flood Advisory	OAX	Douglas, Sarpy	3 hr
Aug 9, 12:20 AM CDT	Special Weather Statement	OAX	Cass	40 min
Aug 9, 12:58 AM CDT	Special Weather Statement	OAX	Cass	47 min
Aug 9, 2:19 AM CDT	Areal Flood Advisory	OAX	Cass, Sarpy	3 hr
Aug 9, 2:43 PM CDT	Special Weather Statement	OAX	Knox	47 min
Aug 9, 2:50 PM CDT	Severe Thunderstorm Warning	OAX	Antelope, Knox	40 min
Aug 9, 2:58 PM CDT	Severe Thunderstorm Warning	OAX	Knox	32 min
Aug 9, 3:31 PM CDT	Special Weather Statement	OAX	Antelope	44 min
Aug 9, 4:17 PM CDT	Special Weather Statement	OAX	Pierce	43 min
Aug 9, 4:52 PM CDT	Special Weather Statement	OAX	Madison	38 min
Aug 9, 5:04 PM CDT	Severe Thunderstorm Warning	OAX	Antelope, Madison, Pierce	26 min
Aug 9, 5:36 PM CDT	Special Weather Statement	OAX	Madison	39 min
Aug 9, 5:59 PM CDT	Special Weather Statement	OAX	Boone	46 min
Aug 9, 6:07 PM CDT	Areal Flood Advisory	OAX	Antelope, Madison	3 hr
Aug 9, 6:12 PM CDT	Special Weather Statement	OAX	Madison	48 min
Aug 9, 6:25 PM CDT	Special Weather Statement	OAX	Knox	50 min
Aug 9, 6:30 PM CDT	Flash Flood Warning	OAX	Antelope, Madison	3 hr
Aug 9, 6:41 PM CDT	Special Weather Statement	OAX	Boone	49 min
Aug 8, 8:29 PM CDT	Special Weather Statement	OAX	Fremont	46 min
Aug 8, 9:21 PM CDT	Severe Thunderstorm Warning	OAX	Montgomery, Page	39 min
Aug 8, 9:45 PM CDT	Severe Thunderstorm Warning	OAX	Montgomery	33 min
Aug 8, 9:50 PM CDT	Special Weather Statement	OAX	Mills	40 min
Aug 9, 12:10 AM CDT	Special Weather Statement	OAX	Fremont, Page	50 min
Aug 9, 12:32 AM CDT	Areal Flood Advisory	OAX	Fremont	3 hr
Aug 9, 1:21 AM CDT	Severe Thunderstorm Warning	OAX	Fremont, Page	24 min
Aug 9, 1:40 AM CDT	Special Weather Statement	OAX	Fremont	50 min
Aug 9, 1:42 AM CDT	Special Weather Statement	OAX	Mills	48 min
Aug 9, 1:45 AM CDT	Special Weather Statement	OAX	Page	30 min
Aug 9, 3:42 AM CDT	Areal Flood Advisory	OAX	Fremont, Page	3 hr
Aug 9, 10:08 AM CDT	River Flood Warning	OAX	Fremont	7 days
Aug 9, 10:59 AM CDT	River Flood Warning	OAX	Fremont	36 hr

Nearby

Special Weather Statements in Nebraska, 2015 Every special weather statement 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.