Alert archive / Nebraska / Tornado Warnings in 2007

Tornado Warning 21, NWS Omaha, NE

August 8, 2007Richardson County, Nebraska

NWS Omaha, NE issued this tornado warning at Aug 8, 2007, 6:41 PM CDT for Richardson County, Nebraska. It was in force for 34 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: Aug 8, 2007, 6:41 PM CDT (23:41 UTC)
Expired: Aug 8, 2007, 7:15 PM CDT
In force: 34 min
Issued by: NWS Omaha, NE
Area: Counties, with a storm outline in the text

County Richardson County, NE

The radar

The Topeka radar (KTWX), 134 km from the middle of the area, began a volume at 23:45 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
Aug 8, 6:45 PM CDT	TSTM WND DMG	2 Sw Shubert, NE	NUMEROUS 3 INCH IN DIAMETER TREE LIMBS DOWNED. HEAVY RAIN ALSO REPORTED WITH 2.4 INCHES IN LESS THAN 2 HOURS WITH A LARGE AREA OF PONDING WATER.

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
Aug 8, 4:43 PM CDT	Tornado Watch	SPC	7 hr

The nearest sounding before it

Topeka, KS (KTOP), launched 12:00Z, 11.7 hours before the alert went out and 129 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: 1334 J/kg
Mixed-layer CIN: -105 J/kg
Mixed-layer LCL: 895 m above ground
0-6 km bulk shear: 41 kt
0-1 km storm-relative helicity: 30 m²/s²
0-3 km storm-relative helicity: 28 m²/s²
Significant tornado parameter: 0.1
Supercell composite: 0.4

Open this sounding in Storm Lab

The text

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

000 
WFUS53 KOAX 082341
TOROAX
NEC147-090015-
/O.NEW.KOAX.TO.W.0021.070808T2341Z-070809T0015Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE OMAHA/VALLEY NEBRASKA
641 PM CDT WED AUG 8 2007

THE NATIONAL WEATHER SERVICE IN OMAHA HAS ISSUED A

* TORNADO WARNING FOR...
  RICHARDSON COUNTY IN SOUTHEAST NEBRASKA...

* UNTIL 715 PM CDT

* AT 640 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO. THE MOST
  DANGEROUS PART OF THE STORM WAS LOCATED NEAR SHUBERT...OR ABOUT 10
  MILES NORTH OF FALLS CITY...MOVING EAST AT 25 MPH.

* LOCATIONS IMPACTED INCLUDE...
BARADA...

THE SAFEST PLACE TO BE DURING A TORNADO IS IN A BASEMENT. GET UNDER A
WORKBENCH OR A PIECE OF STURDY FURNITURE. IF A BASEMENT IS NOT
AVAILABLE...SEEK SHELTER ON THE LOWEST LEVEL OF THE BUILDING. GO TO
AN INTERIOR ROOM OR HALLWAY. USE BLANKETS OR PILLOWS TO COVER YOUR
BODY AND ALWAYS STAY AWAY FROM WINDOWS.

A TORNADO WATCH REMAINS IN EFFECT UNTIL MIDNIGHT CDT THURSDAY MORNING
FOR SOUTHEAST NEBRASKA AND SOUTHWEST IOWA.

LAT...LON 4025 9600 4000 9600 4001 9572 4015 9544
      4026 9553

$$

CHERMOK

2 follow-up statements

000 
WWUS53 KOAX 090003
SVSOAX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE OMAHA/VALLEY NEBRASKA
702 PM CDT WED AUG 8 2007

NEC147-090015-
/O.CON.KOAX.TO.W.0021.000000T0000Z-070809T0015Z/
RICHARDSON NE-
702 PM CDT WED AUG 8 2007

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 715 PM CDT FOR
RICHARDSON COUNTY...

AT 657 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO 
INDICATE A SEVERE THUNDERSTORM...POSSIBLY CAPABLE OF PRODUCING A 
TORNADO.  THIS STORM WAS LOCATED NEAR SALEM...OR ABOUT 9 MILES WEST 
OF FALLS CITY...MOVING EAST NORTHEAST AT 30 MPH.  IN 
ADDITION...STRONG WINDS CAN BE EXPECTED WELL IN ADVANCE OF THE STORM.

LOCATIONS IMPACTED INCLUDE...VERDON...SHUBERT AND BARADA.

THE SAFEST PLACE TO BE DURING A TORNADO IS IN A BASEMENT. GET UNDER A
WORKBENCH OR OTHER PIECE OF STURDY FURNITURE. IF NO BASEMENT IS
AVAILABLE...SEEK SHELTER ON THE LOWEST FLOOR OF THE BUILDING IN AN
INTERIOR HALLWAY OR ROOM SUCH AS A CLOSET. USE BLANKETS OR PILLOWS TO
COVER YOUR BODY AND ALWAYS STAY AWAY FROM WINDOWS.

IF IN MOBILE HOMES OR VEHICLES...EVACUATE THEM AND GET INSIDE A
SUBSTANTIAL SHELTER. IF NO SHELTER IS AVAILABLE...LIE FLAT IN THE
NEAREST DITCH OR OTHER LOW SPOT AND COVER YOUR HEAD WITH YOUR HANDS.

A TORNADO WATCH REMAINS IN EFFECT UNTIL MIDNIGHT CDT THURSDAY MORNING
FOR SOUTHEAST NEBRASKA AND SOUTHWEST IOWA.

LAT...LON 4025 9600 4000 9600 4001 9572 4015 9544
      4026 9553

$$

CHERMOK

000 
WWUS53 KOAX 090020
SVSOAX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE OMAHA/VALLEY NEBRASKA
718 PM CDT WED AUG 8 2007

NEC147-090028-
/O.EXP.KOAX.TO.W.0021.000000T0000Z-070809T0015Z/
RICHARDSON NE-
718 PM CDT WED AUG 8 2007

...THE TORNADO WARNING FOR RICHARDSON COUNTY EXPIRED AT 715 PM CDT...

HOWEVER...A SEVERE THUNDERSTORM WARNING IS IN EFFECT UNTIL 745 PM 
AND A FLASH FLOOD WARNING IS IN EFFECT UNTIL 1015 PM.  THUNDERSTORMS 
WILL CONTINUE OVER MUCH OF RICHARDSON COUNTY THROUGH 830 PM.  THESE 
WILL LIKELY PRODUCE ADDITIONAL RAINFALL IN EXCESS OF 1 INCH...WHICH 
COULD CAUSE FLASH FLOODING.  IN ADDITION...WIND GUSTS TO 60 MPH AND 
DIME SIZE HAIL REMAIN POSSIBLE FROM SOUTHWEST OF SALEM TOWARD FALLS 
CITY AND RULO THROUGH 745 PM.

A TORNADO WATCH REMAINS IN EFFECT UNTIL MIDNIGHT CDT THURSDAY MORNING
FOR SOUTHEAST NEBRASKA AND SOUTHWEST IOWA.

LAT...LON 4025 9600 4000 9600 4001 9572 4015 9544
      4026 9553

$$
CHERMOK

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 7, 10:41 PM CDT	Severe Thunderstorm Warning	OAX	Nemaha	49 min
Aug 8, 12:48 AM CDT	Flash Flood Warning	OAX	Otoe	6 hr
Aug 8, 6:41 AM CDT	Flash Flood Warning	OAX	Otoe	2 hr
Aug 8, 10:43 AM CDT	River Flood Warning	OAX	Nemaha	3 hr
Aug 8, 4:47 PM CDT	Severe Thunderstorm Warning	OAX	Gage, Lancaster, Otoe	28 min
Aug 8, 5:15 PM CDT	Severe Thunderstorm Warning	OAX	Gage, Johnson	45 min
Aug 8, 5:53 PM CDT	Severe Thunderstorm Warning	OAX	Nemaha	37 min
Aug 8, 6:27 PM CDT	Severe Thunderstorm Warning	OAX	Nemaha, Richardson	33 min
Aug 8, 6:54 PM CDT	Flash Flood Warning	OAX	Nemaha	3 hr

Nearby

Tornado Warnings in Nebraska, 2007 Every tornado warning in 2007 Tornadoes in 2007

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.