Alert archive / Nebraska / Severe Thunderstorm Warnings in 2008

Severe Thunderstorm Warning 430, NWS Omaha, NE

September 23, 2008Nemaha County, Nebraska

NWS Omaha, NE issued this severe thunderstorm warning at Sep 23, 2008, 5:42 PM CDT for Nemaha County, Nebraska. It was in force for 33 min. 1 report came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued: Sep 23, 2008, 5:42 PM CDT (22:42 UTC)
Expired: Sep 23, 2008, 6:15 PM CDT
In force: 33 min
Issued by: NWS Omaha, NE
Area: Storm-based polygon

County Nemaha County, NE

The radar

The Omaha radar (KOAX), 118 km from the middle of the area, began a volume at 23:00 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.

What was reported inside it

Time	Report	Where	Remark
Sep 23, 5:50 PM CDT	HAIL 1	Auburn, NE

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Omaha, NE (KOAX), launched 12:00Z, 10.7 hours before the alert went out and 118 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: 136 J/kg
Mixed-layer CIN: -279 J/kg
Mixed-layer LCL: 969 m above ground
0-6 km bulk shear: 23 kt
0-1 km storm-relative helicity: 280 m²/s²
0-3 km storm-relative helicity: 385 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

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

000 
WUUS53 KOAX 232242
SVROAX
NEC127-232315-
/O.NEW.KOAX.SV.W.0430.080923T2242Z-080923T2315Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE OMAHA/VALLEY NEBRASKA
542 PM CDT TUE SEP 23 2008

THE NATIONAL WEATHER SERVICE IN OMAHA HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  EASTERN NEMAHA COUNTY IN SOUTHEAST NEBRASKA...

* UNTIL 615 PM CDT.

* AT 539 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING 3/4 INCH HAIL.  THIS STORM
  WAS LOCATED NEAR AUBURN...OR 23 MILES WEST OF TARKIO...AND WAS
  MOVING EAST AT 25 MPH. 3/4 INCH HAIL WAS REPORTED IN AUBURN.

* LOCATIONS IMPACTED INCLUDE...
  PERU AND RURAL AREAS EAST OF AUBURN

HAIL OF 3/4 INCH IN DIAMETER OR LARGER IS LIKELY WITH THIS STORM. GO
TO A SAFE PLACE INSIDE YOUR HOME OR BUSINESS. STAY AWAY FROM WINDOWS
AND GLASS DOORS.

LAT...LON 4029 9589 4046 9594 4052 9568 4048 9569
      4045 9566 4041 9565 4039 9563 4036 9563
      4034 9561 4033 9561 4030 9565
TIME...MOT...LOC 2242Z 257DEG 22KT 4040 9580

$$

MILLER

3 follow-up statements

000 
WWUS53 KOAX 232252
SVSOAX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE OMAHA/VALLEY NEBRASKA
552 PM CDT TUE SEP 23 2008

NEC127-232315-
/O.CON.KOAX.SV.W.0430.000000T0000Z-080923T2315Z/
NEMAHA NE-
551 PM CDT TUE SEP 23 2008

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 615 PM CDT
FOR EASTERN NEMAHA COUNTY...

AT 548 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE
HAIL.  THIS STORM WAS LOCATED NEAR BROWNVILLE...OR 20 MILES WEST OF 
TARKIO...MOVING EAST AT 25 MPH. HAIL UP TO ONE INCH IN DIAMETER WAS
REPORTED IN AUBURN.

LOCATIONS IMPACTED INCLUDE...PERU...NEMAHA...BROWNVILLE AND 
BROWNVILLE STATE RECREATION AREA. 

THIS STORM MAY PRODUCE HAIL 1 INCH IN DIAMETER OR LARGER. SEEK A
STURDY SHELTER IMMEDIATELY. STAY AWAY FROM WINDOWS AND GLASS DOORS.

LAT...LON 4029 9589 4046 9594 4052 9568 4048 9569
      4045 9566 4041 9565 4039 9563 4036 9563
      4034 9561 4033 9561 4030 9565
TIME...MOT...LOC 2251Z 257DEG 22KT 4041 9573

$$

MILLER

000 
WWUS53 KOAX 232259
SVSOAX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE OMAHA/VALLEY NEBRASKA
559 PM CDT TUE SEP 23 2008

NEC127-232315-
/O.CON.KOAX.SV.W.0430.000000T0000Z-080923T2315Z/
NEMAHA NE-
559 PM CDT TUE SEP 23 2008

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 615 PM CDT
FOR EASTERN NEMAHA COUNTY...

AT 556 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING 3/4 INCH HAIL. 
THIS STORM WAS LOCATED NEAR BROWNVILLE...OR 16 MILES WEST OF
TARKIO...MOVING EAST AT 25 MPH.

THE SEVERE THUNDERSTORM WILL OTHERWISE REMAIN OVER MAINLY RURAL AREAS
OF THE INDICATED COUNTY.

THIS STORM MAY PRODUCE HAIL 3/4 INCH IN DIAMETER OR LARGER. SEEK A
STURDY SHELTER IMMEDIATELY. STAY AWAY FROM WINDOWS AND GLASS DOORS.

LAT...LON 4030 9577 4047 9584 4052 9568 4048 9569
      4045 9566 4041 9565 4039 9563 4036 9563
      4034 9561 4033 9561 4031 9564 4030 9565
TIME...MOT...LOC 2259Z 257DEG 22KT 4042 9567

$$

MILLER

000 
WWUS53 KOAX 232309
SVSOAX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE OMAHA/VALLEY NEBRASKA
609 PM CDT TUE SEP 23 2008

NEC127-232319-
/O.EXP.KOAX.SV.W.0430.000000T0000Z-080923T2315Z/
NEMAHA NE-
609 PM CDT TUE SEP 23 2008

...THE SEVERE THUNDERSTORM WARNING FOR EASTERN NEMAHA COUNTY WILL
EXPIRE AT 615 PM CDT...

THE WARNING WHICH WAS IN EFFECT WILL BE ALLOWED TO EXPIRE AS 
SCHEDULED. SEVERE STORMS WERE MOVING OUT OF THE WARNED AREA.

LAT...LON 4030 9577 4047 9584 4052 9568 4048 9569
      4045 9566 4041 9565 4039 9563 4036 9563
      4034 9561 4033 9561 4031 9564 4030 9565
TIME...MOT...LOC 2309Z 257DEG 22KT 4043 9559

$$

MILLER

The office that day

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

Issued	Product	Office	Counties	Lasted
Sep 23, 3:07 PM CDT	Severe Thunderstorm Warning	OAX	Gage, Jefferson	38 min
Sep 23, 4:06 PM CDT	Severe Thunderstorm Warning	OAX	Johnson, Nemaha, Otoe	39 min
Sep 23, 4:30 PM CDT	Severe Thunderstorm Warning	OAX	Johnson, Nemaha, Pawnee, Richardson	45 min
Sep 23, 4:59 PM CDT	Severe Thunderstorm Warning	OAX	Nemaha, Otoe	46 min
Sep 23, 5:15 PM CDT	Severe Thunderstorm Warning	OAX	Nemaha	15 min
Sep 23, 6:18 PM CDT	Severe Thunderstorm Warning	OAX	Cass	27 min

Nearby

Severe Thunderstorm Warnings in Nebraska, 2008 Every severe thunderstorm warning in 2008

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.