Alert archive / Nebraska / Tornado Warnings in 2008

Tornado Warning 4, NWS Cheyenne, WY

April 23, 2008Morrill County, Nebraska

NWS Cheyenne, WY issued this tornado warning at Apr 23, 2008, 6:01 PM MDT for Morrill County, Nebraska. It was in force for 29 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 23, 2008, 6:01 PM MDT (00:01 UTC)
Expired: Apr 23, 2008, 6:30 PM MDT
In force: 29 min
Issued by: NWS Cheyenne, WY
Area: Storm-based polygon

County Morrill County, NE

The radar

The Cheyenne radar (KCYS), 162 km from the middle of the area, began a volume at 00:03 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 23, 6:15 PM MDT	HAIL 2.75	6 S Bridgeport, NE	THE HAIL SHATTERED AUTO WINDSHIELDS.

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
Jan 7, 12:52 PM MST	Tornado Watch	SPC	146 days
Apr 23, 1:25 PM MDT	Tornado Watch	SPC	8 hr

The nearest sounding before it

Denver, CO (KDNR), launched 00:00Z, 0.0 hours before the alert went out and 200 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: 51 J/kg
Mixed-layer CIN: -1 J/kg
Mixed-layer LCL: 4518 m above ground
0-6 km bulk shear: 10 kt
0-1 km storm-relative helicity: 50 m²/s²
0-3 km storm-relative helicity: 39 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 
WFUS55 KCYS 240001
TORCYS
NEC123-240030-
/O.NEW.KCYS.TO.W.0004.080424T0001Z-080424T0030Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE CHEYENNE WY
601 PM MDT WED APR 23 2008

THE NATIONAL WEATHER SERVICE IN CHEYENNE HAS ISSUED A

* TORNADO WARNING FOR...
  EASTERN MORRILL COUNTY IN THE PANHANDLE OF NEBRASKA...

* UNTIL 630 PM MDT

* AT 558 PM MDT...LOCAL LAW ENFORCEMENT REPORTED A TORNADO 6 MILES
  SOUTH OF BRIDGEPORT...OR 31 MILES NORTH OF SIDNEY...MOVING
  NORTHEAST AT 25 MPH.

* THE TORNADO WILL BE NEAR...
  BRIDGEPORT BY 605 PM...
  BRICKER LAKES BY 610 PM...
  BOX LAKE AND PETERSON LAKE BY 630 PM...

MOVE INTO A BASEMENT OR AN INTERIOR ROOM ON THE LOWEST FLOOR OF A
STURDY BUILDING. ABANDON MOBILE HOMES AND VEHICLES.

IN ADDITION TO THE TORNADO...THIS STORM IS CAPABLE OF PRODUCING
TENNIS BALL SIZE HAIL AND DESTRUCTIVE STRAIGHT LINE WINDS.

REPORT SEVERE WEATHER TO THE NATIONAL WEATHER SERVICE OFFICE IN
CHEYENNE AT 1-800-269-6220.

LAT...LON 4167 10309 4188 10294 4168 10268 4147 10297
      4159 10318
TIME...MOT...LOC 0001Z 214DEG 22KT 4160 10304

$$

JLH

2 follow-up statements

000 
WWUS55 KCYS 240020
SVSCYS

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE CHEYENNE WY
619 PM MDT WED APR 23 2008

NEC123-240030-
/O.CON.KCYS.TO.W.0004.000000T0000Z-080424T0030Z/
MORRILL NE-
619 PM MDT WED APR 23 2008

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 630 PM MDT FOR MORRILL
COUNTY...

AT 617 PM MDT...LOCAL LAW ENFORCEMENT REPORTED A TORNADO.  THIS 
TORNADO WAS LOCATED 5 MILES EAST SOUTHEAST OF BRIDGEPORT...MOVING 
NORTHEAST AT 25 MPH. LARGE HAIL UP TO HALF DOLLAR SIZE WAS FALLING
IN THE TOWN OF BRIDGEPORT.

THE TORNADO WILL BE NEAR...
  BOX LAKE AND PETERSON LAKE BY 630 PM...

THIS IS A DANGEROUS STORM. ACT QUICKLY. IF YOU ARE IN THE PATH OF
THIS TORNADO MOVE TO THE LOWEST FLOOR OF A STURDY BUILDING.

IN ADDITION TO THE THREAT OF A TORNADO...DAMAGING HAIL AND WIND CAN
BE EXPECTED. GO TO A SAFE PLACE NOW

A TORNADO WATCH REMAINS IN EFFECT UNTIL 900 PM WEDNESDAY EVENING FOR
CENTRAL NEBRASKA.

REPORT SEVERE WEATHER TO THE NATIONAL WEATHER SERVICE OFFICE IN
CHEYENNE AT 1-800-269-6220.

LAT...LON 4167 10309 4188 10294 4168 10268 4147 10297
      4159 10318
TIME...MOT...LOC 0019Z 214DEG 22KT 4169 10296

$$

JLH

000 
WWUS55 KCYS 240029
SVSCYS

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE CHEYENNE WY
629 PM MDT WED APR 23 2008

NEC123-240039-
/O.EXP.KCYS.TO.W.0004.000000T0000Z-080424T0030Z/
MORRILL NE-
629 PM MDT WED APR 23 2008

...THE TORNADO WARNING FOR MORRILL COUNTY WILL EXPIRE AT 630 PM
MDT...

ALTHOUGH THIS WARNING WILL BE ALLOWED TO EXPIRE...A NEW TORNADO
WARNING REPLACING IT WILL BE ISSUED SHORTLY.

A TORNADO WATCH REMAINS IN EFFECT UNTIL 900 PM WEDNESDAY EVENING FOR
CENTRAL NEBRASKA.

REPORT SEVERE WEATHER TO THE NATIONAL WEATHER SERVICE OFFICE IN
CHEYENNE AT 1-800-269-6220.

LAT...LON 4167 10309 4188 10294 4168 10268 4147 10297
      4159 10318
TIME...MOT...LOC 0029Z 214DEG 22KT 4174 10291

$$

JLH

The office that day

Everything else NWS Cheyenne, WY issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Apr 23, 6:08 PM MDT	Severe Thunderstorm Warning	CYS	Box Butte	37 min
Apr 23, 6:31 PM MDT	Tornado Warning	CYS	Morrill	29 min
Apr 23, 6:45 PM MDT	Severe Thunderstorm Warning	CYS	Dawes, Sioux	45 min
Apr 23, 6:53 PM MDT	Severe Thunderstorm Warning	CYS	Dawes	52 min
Apr 23, 7:07 PM MDT	Severe Thunderstorm Warning	CYS	Box Butte, Morrill	38 min
Apr 23, 7:32 PM MDT	Severe Thunderstorm Warning	CYS	Dawes	58 min
Apr 23, 7:47 PM MDT	Severe Thunderstorm Warning	CYS	Box Butte, Morrill	28 min
Apr 23, 8:01 PM MDT	Wind Advisory	CYS	Box Butte, Cheyenne, Dawes, Morrill	3 hr
Apr 23, 8:35 PM MDT	Severe Thunderstorm Warning	CYS	Dawes	25 min

Nearby

Tornado Warnings in Nebraska, 2008 Every tornado warning in 2008 Tornadoes 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.