Alert archive / Nebraska / Severe Thunderstorm Warnings in 2001

Severe Thunderstorm Warning 37, NWS Hastings, NE

April 11, 2001Polk County, Nebraska

NWS Hastings, NE issued this severe thunderstorm warning at Apr 11, 2001, 12:53 AM CDT for Polk County, Nebraska. It was in force for 52 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: Apr 11, 2001, 12:53 AM CDT (05:53 UTC)
Expired: Apr 11, 2001, 1:45 AM CDT
In force: 52 min
Issued by: NWS Hastings, NE
Area: Whole counties

County Polk County, NE

The radar

The Omaha radar (KOAX), 102 km from the middle of the area, began a volume at 05:57 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
Apr 10, 10:15 PM CDT	Severe Thunderstorm Watch	SPC	6 hr

The nearest sounding before it

Omaha, NE (KOAX), launched 00:00Z, 5.9 hours before the alert went out and 101 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: 18 J/kg
Mixed-layer CIN: -145 J/kg
Mixed-layer LCL: 493 m above ground
0-6 km bulk shear: 55 kt
0-1 km storm-relative helicity: 84 m²/s²
0-3 km storm-relative helicity: 131 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.6

Open this sounding in Storm Lab

The text

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

000 
WUUS53 KGID 110554
SVRGRI
NEC143-110645-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE HASTINGS NE
1253 AM CDT WED APR 11 2001

THE NATIONAL WEATHER SERVICE IN HASTINGS HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  POLK COUNTY IN EAST CENTRAL NEBRASKA

* UNTIL 145 AM CDT

* AT 1249 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM OVER OSCEOLA...OR ABOUT 20 MILES SOUTHWEST OF
  COLUMBUS...MOVING NORTHEAST AT 20 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  SHELBY AT 100 AM CDT

PEOPLE IN POLK COUNTY SHOULD SEEK SHELTER IN A STURDY STRUCTURE AND
STAY AWAY FROM WINDOWS. THE PRIMARY SEVERE WEATHER THREAT sIS LARGE
HAIL.

$$

FAY

LAT...LON 4120 9771 4111 9764 4107 9754 4138 9706
          4155 9730

NNNN

What forecasters said that day

The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Hastings, NE wrote its last area forecast discussion before this severe thunderstorm warning went out at Apr 10, 1:45 PM CDT, 11 hours 8 minutes earlier.

Area forecast discussion, Apr 10, 1:45 PM CDT, 11 hours 8 minutes before

SOUTH CENTRAL NEBRASKA/NORTH CENTRAL KANSAS FORECAST DISCUSSION
NATIONAL WEATHER SERVICE HASTINGS NE
145 PM CDT TUE APR 10 2001

...TSRA POTENTIAL THE NEXT 24 HRS IS THE MAIN CONCERN...

SMALL...BUT RELATIVELY POTENT...BATCH OF TSRAS PRODUCED SVR WX ACROSS
THE MIDDLE OF CWA THIS MORNING. THIS CLUSTER EFFECTIVELY PUSHED INVERTED
SFC TROF SOUTH TO NEAR THE NEB/KS BORDER...AT LEAST IN OUR CWA. FURTHER
SOUTH...WARM FRONT IS LIFTING THRU CNTRL KS W/ M60 DWPTS AS FAR NORTH AS
TOP/SLN. PLENTY OF TSRA ACTIVITY IN WARM SECTOR IN ERN KS...W/ WEAKER
RETURNS INTO OUR 6 NC CNTYS. AS WARM LIFTS INTO INVERTED TROF...EXPECT
TSRAS TO BECOME MORE WIDESPREAD LATE THIS AFTN INTO EVENING. THE BEST
POTENTIAL FOR SVR WX WILL BE OVER NC KS...BUT WILL ALSO WORK NORTH THRU
NEB CNTYS AS STRONG OVERRUNNING OF COOL SFC AIR TAKES PLACE TONIGHT W/
THE APPROACH OF POTENT UPPER LVL SYS CURRENTLY INDICATED CLEARING ON WV
IN AZ. EVENTUALLY EXPECT COOL LLVL AIR TO BE DISPLACED NORTH AS WELL
OVER MOST OF CWA.

WILL FOLLOW ETA W/ ITS SLIGHTLY BETTER HANDING OF LLVL MOISTURE INFLUX
W/ THE CAVIOT THAT IT DID NOT ANTICIPATE THE SWRD PUSH OF SFC TROF BY
AM TSRAS. REALLY...FCST PLAYS OUT ABOUT THE SAME USING ALL THE MDLS W/
BASIC SCENARIO OF TSRAS INCREASING IN COVERAGE THRU NC KS THIS AFTN &
SPREADING THRU NEB CNTYS THIS EVENING...SOME DRY SLOTTING OVERNIGHT...
THEN THE UPPER LO LIFTS NE OVER CWA TOMR...W/ POTENTIAL FOR SVR WX...
INCLUDING TORNADOS INTO EARLY AFTN...WHEN SYS PASSES NE AND A STRONG W
TO NW WIND DRIES THINGS OUT. WHEN ALL THINGS ARE SAID AND DONE...ONLY
NEED TO TWEEK CURRENT FCST. WILL HAVE TO REWORD TEMPS TONIGHT AS 40S
IN PLACE OVER MUCH OF NRN/CNTRL CWA WILL BE REPLACED BY 50S TONIGHT.
WILL UP TEMPS TOMR AS WELL...ESP SE 1/2 OF CWA BASED ON PROGGED TRACK
OF SFC LO AND SOUTH WINDS FCST THRU EARLY AFTN.

AS FOR EXTENDED...WONT PLAY W/ MUCH. AS PER PMDEPD...SOME DIFFICULTY
W/ NEXT WAVE THAT DROPS IN BEHIND CURRENT SYS. I AM INCLINED TO LEAVE
FCST DRY. I EXPECT 2ND SYS TO HAVE ALOT OF TROUBLE MAINTAINING ITSELF
AS IT WORKS EAST INTO CONFLUENT FLOW LEFT IN BEHIND CURRENT BIG STORM.
OTHERWISE...A TREND TOWARD WARMER WX BY WEEKEND AFTER COOLER READINGS
INVADE LATE WED INTO THU IN WAKE OF AZ UPPER LO.

.GID...NONE.

GURNEY

In the hours before

Local storm report, Apr 10, 8:37 PM CDT, 4 hours 16 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE HASTINGS NE
837 PM CDT TUE APR 10 2001

TIME(CDT)  .....CITY LOCATION..... STATE   ...EVENT/REMARKS...
           ....COUNTY LOCATION....
R
0818 PM    ROCKVILLE                 NE    .75 INCH HAIL
04/10/01   SHERMAN

0830 PM    3 WNW FARWELL             NE    1 INCH HAIL
04/10/01   HOWARD

Local storm report, Apr 11, 12:03 AM CDT, 50 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE HASTINGS NE
1203 AM CDT WED APR 11 2001

TIME(CDT)  .....CITY LOCATION..... STATE   ...EVENT/REMARKS...
           ....COUNTY LOCATION....

1145 PM    PALCO                     KS    1.75 INCH HAIL
04/10/01   ROOKS

1145 PM    3 S PLAINVILLE            KS    WIND DAMAGE
04/10/01   ROOKS

1145 PM    PLAINVILLE                KS    75 MPH TSTM GUST
04/10/01   ROOKS

Local storm report, Apr 11, 12:31 AM CDT, 22 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE HASTINGS NE
1231 AM CDT WED APR 11 2001

TIME(CDT)  .....CITY LOCATION..... STATE   ...EVENT/REMARKS...
           ....COUNTY LOCATION....

1218 AM    6 W ALTON                 KS    80 MPH TSTM GUST
04/11/01   OSBORNE

1220 AM    5 W PHILLIPSBURG          KS    1 INCH HAIL
04/11/01   PHILLIPS

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 10, 7:57 PM CDT	Severe Thunderstorm Warning	GID	Sherman	48 min
Apr 10, 8:22 PM CDT	Severe Thunderstorm Warning	GID	Howard	38 min
Apr 10, 9:12 PM CDT	Severe Thunderstorm Warning	GID	Greeley, Howard, Nance	48 min
Apr 11, 12:44 AM CDT	Severe Thunderstorm Warning	GID	Merrick	46 min
Apr 11, 12:51 AM CDT	Severe Thunderstorm Warning	GID	Webster	39 min
Apr 11, 1:11 AM CDT	Tornado Warning	GID	Webster	49 min
Apr 11, 1:13 AM CDT	Severe Thunderstorm Warning	GID	Nuckolls	47 min
Apr 11, 1:29 AM CDT	Tornado Warning	GID	Nuckolls	31 min
Apr 11, 1:31 AM CDT	Severe Thunderstorm Warning	GID	Thayer	59 min

Nearby

Severe Thunderstorm Warnings in Nebraska, 2001 Every severe thunderstorm warning 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.