Alert archive / Nebraska / Tornado Warnings in 2001

Tornado Warning 76, NWS Omaha, NE

September 7, 2001Gage County, Nebraska

NWS Omaha, NE issued this tornado warning at Sep 7, 2001, 6:59 PM CDT for Gage County, Nebraska. It was in force for 46 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline the Iowa Environmental Mesonet reconstructed for it; the warning itself named whole counties.

The facts

Issued: Sep 7, 2001, 6:59 PM CDT (23:59 UTC)
Expired: Sep 7, 2001, 7:45 PM CDT
In force: 46 min
Issued by: NWS Omaha, NE
Area: Whole counties; the outline is the Mesonet’s reconstruction

County Gage County, NE

The radar

The Omaha radar (KOAX), 117 km from the middle of the area, began a volume at 00:00 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.

The watch it was issued in

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

Issued	Product	Office	Lasted
Sep 7, 2:00 PM CDT	Severe Thunderstorm Watch	SPC	6 hr
Sep 7, 4:45 PM CDT	Severe Thunderstorm Watch	SPC	3 hr

The nearest sounding before it

Topeka, KS (KTOP), launched 12:00Z, 12.0 hours before the alert went out and 193 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: 1545 J/kg
Mixed-layer CIN: -21 J/kg
Mixed-layer LCL: 658 m above ground
0-6 km bulk shear: 24 kt
0-1 km storm-relative helicity: 140 m²/s²
0-3 km storm-relative helicity: 141 m²/s²
Significant tornado parameter: 0.7
Supercell composite: 4.1

Open this sounding in Storm Lab

The text

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

000 
WFUS53 KOAX 080001
TOROMA
IAC145-080045-

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE OMAHA NE
700 PM CDT FRI SEP 7 2001

THE NATIONAL WEATHER SERVICE IN OMAHA HAS ISSUED A

* TORNADO WARNING FOR...
  PAGE COUNTY IN SOUTHWEST IOWA

* UNTIL 745 PM CDT

* AT 655 PM CDT...RADAR INDICATED A THUNDERSTORM WITH STRONG ROTATION
  AND A POSSIBLE TORNADO 4 MILES SOUTHWEST OF COIN...OR ABOUT 41  
  MILES NORTHEAST OF FALLS CITY...MOVING NORTHEAST AT 20 MPH.  A
  FUNNEL CLOUD WAS REPORTED IN MISSOURI WITH THIS STORM.

* SOME LOCATIONS AFFECTED...
  COIN
  COLLEGE SPRINGS
  YORKTOWN
  CLARINDA

THIS REPLACES THE SEVERE THUNDERSTORM WARNING PREVIOUSLY ISSUED FOR
THE WARNED AREA.

IF YOU ARE IN THE PATH OF A TORNADO...GO TO A BASEMENT. IF A BASEMENT
IS NOT AVAILABLE...TAKE COVER IN AN INTERIOR ROOM ON THE LOWEST LEVEL
OF YOUR HOME OR BUSINESS. AVOID WINDOWS.

LAT...LON 4065 9540 4057 9519 4075 9490 4092 9528

MILLER

The office that day

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

Issued	Product	Office	Counties	Lasted
Sep 7, 12:51 AM CDT	Severe Thunderstorm Warning	OAX	Knox	54 min
Sep 7, 1:09 AM CDT	Severe Thunderstorm Warning	OAX	Antelope	46 min
Sep 7, 1:48 AM CDT	Severe Thunderstorm Warning	OAX	Knox, Pierce	42 min
Sep 7, 1:55 AM CDT	Severe Thunderstorm Warning	OAX	Antelope, Boone	35 min
Sep 7, 3:13 AM CDT	Severe Thunderstorm Warning	OAX	Cuming	32 min
Sep 7, 3:18 AM CDT	Severe Thunderstorm Warning	OAX	Colfax	27 min
Sep 7, 3:24 AM CDT	Severe Thunderstorm Warning	OAX	Dodge	36 min
Sep 7, 3:51 AM CDT	Severe Thunderstorm Warning	OAX	Burt, Cuming, Thurston	24 min
Sep 7, 11:13 AM CDT	Severe Thunderstorm Warning	OAX	Johnson	32 min
Sep 7, 4:43 PM CDT	Severe Thunderstorm Warning	OAX	Jefferson, Saline	32 min
Sep 7, 4:53 PM CDT	Severe Thunderstorm Warning	OAX	Lancaster, Seward	52 min
Sep 7, 5:12 PM CDT	Tornado Warning	OAX	Saline	33 min
Sep 7, 5:31 PM CDT	Severe Thunderstorm Warning	OAX	Gage, Lancaster	59 min
Sep 7, 5:35 PM CDT	Severe Thunderstorm Warning	OAX	Pawnee	40 min
Sep 7, 6:31 PM CDT	Severe Thunderstorm Warning	OAX	Gage, Jefferson	44 min
Sep 7, 6:38 PM CDT	Flash Flood Warning	OAX	Pawnee	6 hr
Sep 7, 6:46 PM CDT	Severe Thunderstorm Warning	OAX	Richardson	44 min

Nearby

Tornado Warnings in Nebraska, 2001 Every tornado warning in 2001 Tornadoes in 2001

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.