Alert archive / Nebraska / Severe Thunderstorm Warnings in 2008

Severe Thunderstorm Warning 21, NWS Omaha, NE

April 25, 20085 counties in Nebraska

NWS Omaha, NE issued this severe thunderstorm warning at Apr 25, 2008, 2:28 AM CDT for 5 counties in Nebraska. It was in force for 62 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: Apr 25, 2008, 2:28 AM CDT (07:28 UTC)
Expired: Apr 25, 2008, 3:30 AM CDT
In force: 62 min
Issued by: NWS Omaha, NE
Area: Storm-based polygon

Counties Johnson County, NE, Nemaha County, NE, Otoe County, NE, Pawnee County, NE, Richardson County, NE

The radar

The Omaha radar (KOAX), 127 km from the middle of the area, began a volume at 07:28 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
Apr 25, 2:35 AM CDT	HAIL 0.75	E Humboldt, NE	TIME ESTIMATED. DELAYED REPORT.

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

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Apr 24, 10:20 PM CDT	Severe Thunderstorm Watch	SPC	7 hr
Apr 25, 1:13 AM CDT	Tornado Watch	SPC	5 hr

The nearest sounding before it

Omaha, NE (KOAX), launched 00:00Z, 7.5 hours before the alert went out and 127 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: 1577 J/kg
Mixed-layer CIN: -12 J/kg
Mixed-layer LCL: 484 m above ground
0-6 km bulk shear: 32 kt
0-1 km storm-relative helicity: 81 m²/s²
0-3 km storm-relative helicity: 132 m²/s²
Significant tornado parameter: 0.7
Supercell composite: 3.4

Open this sounding in Storm Lab

The text

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

000 
WUUS53 KOAX 250728
SVROAX
NEC097-127-131-133-147-250830-
/O.NEW.KOAX.SV.W.0021.080425T0728Z-080425T0830Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE OMAHA/VALLEY NEBRASKA
228 AM CDT FRI APR 25 2008

THE NATIONAL WEATHER SERVICE IN OMAHA HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  EASTERN JOHNSON COUNTY IN SOUTHEAST NEBRASKA...
  NEMAHA COUNTY IN SOUTHEAST NEBRASKA...
  SOUTHEASTERN OTOE COUNTY IN SOUTHEAST NEBRASKA...
  EASTERN PAWNEE COUNTY IN SOUTHEAST NEBRASKA...
  RICHARDSON COUNTY IN SOUTHEAST NEBRASKA...
  THIS INCLUDES THE CITY OF FALLS CITY...

* UNTIL 330 AM CDT.

* AT 224 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING 3/4 INCH HAIL...AND
  DAMAGING WINDS AROUND 60 MPH.  THIS STORM WAS LOCATED NEAR TABLE
  ROCK...OR 30 MILES WEST OF FALLS CITY...AND MOVING EAST AT 35 MPH.

* LOCATIONS IMPACTED INCLUDE...
  TABLE ROCK...TECUMSEH...COOK...HUMBOLDT...JOHNSON...TALMAGE...
  STELLA...AUBURN...VERDON...FALLS CITY...SHUBERT AND PERU...

IF YOU ARE IN THE WARNED AREA...PREPARE FOR DAMAGING WINDS...LARGE
HAIL...HEAVY RAIN AND DANGEROUS LIGHTNING. GET INTO A REINFORCED
BUILDING. STAY AWAY FROM WINDOWS AND GLASS DOORS.

A TORNADO WATCH REMAINS IN EFFECT UNTIL 700 AM CDT FRIDAY MORNING FOR
SOUTHWEST IOWA AND SOUTHEAST NEBRASKA.

LAT...LON 4055 9620 4060 9576 4054 9576 4053 9571
      4050 9568 4048 9569 4034 9561 4031 9564
      4031 9558 4025 9553 4024 9548 4018 9546
      4011 9538 4004 9540 4000 9531 3999 9537
      3999 9618
TIME...MOT...LOC 0728Z 248DEG 30KT 4019 9612

$$

ZAPOTOCNY

3 follow-up statements

000 
WWUS53 KOAX 250749
SVSOAX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE OMAHA/VALLEY NEBRASKA
247 AM CDT FRI APR 25 2008

NEC097-127-131-133-147-250830-
/O.CON.KOAX.SV.W.0021.000000T0000Z-080425T0830Z/
OTOE NE-NEMAHA NE-JOHNSON NE-RICHARDSON NE-PAWNEE NE-
247 AM CDT FRI APR 25 2008

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 330 AM CDT
FOR EASTERN PAWNEE...RICHARDSON...EASTERN JOHNSON...NEMAHA AND
SOUTHEASTERN OTOE COUNTIES...

AT 245 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO 
INDICATE A LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING 3/4 
INCH HAIL...AND DAMAGING WINDS AROUND 60 MPH.  THESE STORMS WERE 
LOCATED NEAR STELLA...OR 17 MILES NORTHWEST OF FALLS CITY...TO 
AUBURN TO HUMBOLDT MOVING EAST AT 40 MPH.

LOCATIONS IMPACTED INCLUDE...AUBURN...JULIAN...SHUBERT...FALLS 
CITY...NEMAHA...PERU...PRESTON...BARADA...BROWNVILLE AND RULO.

A TORNADO WATCH REMAINS IN EFFECT UNTIL 700 AM CDT FRIDAY MORNING FOR
SOUTHWEST IOWA AND SOUTHEAST NEBRASKA.

A SEVERE THUNDERSTORM WATCH ALSO REMAINS IN EFFECT UNTIL 600 AM CDT
FRIDAY MORNING FOR SOUTHEAST NEBRASKA. A SEVERE THUNDERSTORM WATCH
ALSO REMAINS IN EFFECT UNTIL 700 AM CDT FRIDAY MORNING FOR SOUTHWEST
IOWA.

LAT...LON 4055 9620 4060 9576 4054 9576 4053 9571
      4050 9568 4048 9569 4034 9561 4031 9564
      4031 9558 4025 9553 4024 9548 4018 9546
      4011 9538 4004 9540 4000 9531 3999 9537
      3999 9618
TIME...MOT...LOC 0747Z 251DEG 41KT 4027 9575

$$

ZAPOTOCNY

000 
WWUS53 KOAX 250813
SVSOAX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE OMAHA/VALLEY NEBRASKA
308 AM CDT FRI APR 25 2008

NEC097-127-131-133-147-250830-
/O.CON.KOAX.SV.W.0021.000000T0000Z-080425T0830Z/
OTOE NE-NEMAHA NE-JOHNSON NE-RICHARDSON NE-PAWNEE NE-
308 AM CDT FRI APR 25 2008

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 330 AM CDT
FOR EASTERN PAWNEE...RICHARDSON...EASTERN JOHNSON...NEMAHA AND
SOUTHEASTERN OTOE COUNTIES...

AT 307 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO 
INDICATE A LINE OF SEVERE THUNDERSTORM CAPABLE OF PRODUCING 3/4 INCH 
HAIL...AND DAMAGING WINDS AROUND 60 MPH.  THIS STORM WAS LOCATED 7 
MILES NORTH OF RULO...OR 9 MILES NORTHEAST OF FALLS CITY...MOVING 
EAST AT 40 MPH.  

THE SEVERE THUNDERSTORM WILL OTHERWISE REMAIN OVER MAINLY RURAL AREAS
OF RICHARDSON COUNTY AND FALLS CITY.  ANOTHER STORM FROM KANSAS WILL 
MOVE INTO SOUTHERN PAWNEE AND RICHARDSON COUNTY AND MAY PRODUCE 
GUSTY WINDS TO 60 MPH.  

A TORNADO WATCH REMAINS IN EFFECT UNTIL 700 AM CDT FRIDAY MORNING FOR
SOUTHWEST IOWA AND SOUTHEAST NEBRASKA.

A SEVERE THUNDERSTORM WATCH ALSO REMAINS IN EFFECT UNTIL 600 AM CDT
FRIDAY MORNING FOR SOUTHEAST NEBRASKA. A SEVERE THUNDERSTORM WATCH
ALSO REMAINS IN EFFECT UNTIL 700 AM CDT FRIDAY MORNING FOR SOUTHWEST
IOWA.

LAT...LON 4055 9620 4060 9576 4054 9576 4053 9571
      4050 9568 4048 9569 4034 9561 4031 9564
      4031 9558 4025 9553 4024 9548 4018 9546
      4011 9538 4004 9540 4000 9531 3999 9537
      3999 9618
TIME...MOT...LOC 0808Z 264DEG 52KT 4015 9546

$$

ZAPOTOCNY

000 
WWUS53 KOAX 250828
SVSOAX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE OMAHA/VALLEY NEBRASKA
327 AM CDT FRI APR 25 2008

NEC097-127-131-133-147-250837-
/O.EXP.KOAX.SV.W.0021.000000T0000Z-080425T0830Z/
OTOE NE-NEMAHA NE-JOHNSON NE-RICHARDSON NE-PAWNEE NE-
327 AM CDT FRI APR 25 2008

...THE SEVERE THUNDERSTORM WARNING FOR EASTERN PAWNEE...RICHARDSON...
EASTERN JOHNSON...NEMAHA AND SOUTHEASTERN OTOE COUNTIES WILL EXPIRE
AT 330 AM CDT...

THE WARNING WHICH WAS IN EFFECT HAS EXPIRED AND WILL NOT BE REISSUED
AT THIS TIME. HEAVY RAIN...SMALL HAIL AND GUSTY WINDS ARE STILL 
POSSIBLE.

A TORNADO WATCH REMAINS IN EFFECT UNTIL 700 AM CDT FRIDAY MORNING FOR
SOUTHWEST IOWA AND SOUTHEAST NEBRASKA.

A SEVERE THUNDERSTORM WATCH ALSO REMAINS IN EFFECT UNTIL 600 AM CDT
FRIDAY MORNING FOR SOUTHEAST NEBRASKA. A SEVERE THUNDERSTORM WATCH
ALSO REMAINS IN EFFECT UNTIL 700 AM CDT FRIDAY MORNING FOR SOUTHWEST
IOWA.

LAT...LON 4055 9620 4060 9576 4054 9576 4053 9571
      4050 9568 4048 9569 4034 9561 4031 9564
      4031 9558 4025 9553 4024 9548 4018 9546
      4011 9538 4004 9540 4000 9531 3999 9537
      3999 9618
TIME...MOT...LOC 0827Z 264DEG 52KT 4016 9510

$$

ZAPOTOCNY

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 24, 10:42 PM CDT	Severe Thunderstorm Warning	OAX	Gage, Jefferson	48 min
Apr 24, 11:12 PM CDT	Severe Thunderstorm Warning	OAX	Gage	33 min
Apr 24, 11:28 PM CDT	Severe Thunderstorm Warning	OAX	Gage, Johnson, Pawnee	47 min
Apr 24, 11:33 PM CDT	Severe Thunderstorm Warning	OAX	Gage, Jefferson	42 min
Apr 25, 12:12 AM CDT	Severe Thunderstorm Warning	OAX	Gage, Jefferson	48 min
Apr 25, 12:15 AM CDT	Severe Thunderstorm Warning	OAX	Gage, Johnson, Nemaha, Pawnee	45 min
Apr 25, 12:34 AM CDT	Tornado Warning	OAX	Johnson	26 min
Apr 25, 12:41 AM CDT	Tornado Warning	OAX	Johnson, Nemaha	34 min
Apr 25, 1:13 AM CDT	Severe Thunderstorm Warning	OAX	Nemaha, Otoe, Richardson	19 min
Apr 25, 1:23 AM CDT	Severe Thunderstorm Warning	OAX	Otoe	52 min
Apr 25, 1:24 AM CDT	Severe Thunderstorm Warning	OAX	Gage, Jefferson, Saline	51 min
Apr 25, 1:46 AM CDT	Flash Flood Warning	OAX	Gage, Jefferson, Johnson, Pawnee	3 hr
Apr 25, 2:03 AM CDT	Severe Thunderstorm Warning	OAX	Gage, Johnson, Nemaha, Otoe, Pawnee	27 min
Apr 25, 8:47 AM CDT	River Flood Warning	OAX	Gage	7 hr
Apr 25, 9:55 AM CDT	Winter Weather Advisory	OAX	Antelope, Boone, Cedar, Knox, Madison, Pierce and 3 more	6 hr
Apr 25, 10:32 AM CDT	Areal Flood Warning	OAX	Johnson, Pawnee	8 hr

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.