Alert archive / Nebraska / Severe Thunderstorm Warnings in 2001

Severe Thunderstorm Warning 85, NWS Hastings, NE

May 8, 2001Clay County, Nebraska

NWS Hastings, NE issued this severe thunderstorm warning at May 8, 2001, 5:48 PM CDT for Clay County, Nebraska. It was in force for 42 min. 1 report came from inside the area while it was in force.

The area

The counties it named, with what was reported inside it.

The facts

Issued: May 8, 2001, 5:48 PM CDT (22:48 UTC)
Expired: May 8, 2001, 6:30 PM CDT
In force: 42 min
Issued by: NWS Hastings, NE
Area: Whole counties

County Clay County, NE

What was reported inside it

Time	Report	Where	Remark
May 8, 6:20 PM CDT	Hail 1.75	Clay Center, NE

NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in.

The nearest sounding before it

Omaha, NE (KOAX), launched 12:00Z, 10.8 hours before the alert went out and 167 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: 10 J/kg
Mixed-layer CIN: -229 J/kg
Mixed-layer LCL: 1384 m above ground
0-6 km bulk shear: 50 kt
0-1 km storm-relative helicity: 203 m²/s²
0-3 km storm-relative helicity: 244 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 
WUUS53 KGID 082250
SVRGRI

NEC035-082330-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE HASTINGS NE
548 PM CDT TUE MAY 8 2001

THE NATIONAL WEATHER SERVICE IN HASTINGS HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  CLAY COUNTY IN SOUTH CENTRAL NEBRASKA

* UNTIL 630 PM CDT

* AT 546 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED   
  A SEVERE THUNDERSTORM 7 MILES NORTHWEST OF HARVARD...OR ABOUT 13   
  MILES NORTHEAST OF HASTINGS...MOVING SOUTHEAST AT 15 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  HARVARD AT 605 PM CDT
  CLAY CENTER AT 625 PM CDT

PEOPLE IN CLAY COUNTY SHOULD SEEK SHELTER IN A STURDY STRUCTURE AND
STAY AW:AY FROM WINDOWS. THE PRIMARY SEVERE WEATHER THREAT IS LARGE
HAIL.

$$

KD

LAT...LON 4069 9804 4069 9827 4036 9823 4046 9784

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 May 8, 2:17 PM CDT, 3 hours 31 minutes earlier.

Area forecast discussion, May 8, 2:17 PM CDT, 3 hours 31 minutes before

SOUTH CENTRAL NEBRASKA/NORTH CENTRAL KANSAS FORECAST DISCUSSION
NATIONAL WEATHER SERVICE HASTINGS NE
217 PM CDT TUE MAY 8 2001

MAIN FOCUS FOR THIS PACKAGE IS THE CHANCE FOR CONVECTION AND RAIN
WEDNESDAY NIGHT THROUGH FRIDAY.

18Z SFC ANALYSIS SHOWS RELATIVELY WEAK PATTERN WITH TROF NEAR A VTN-
LHX LINE. 50+ DEW POINTS WERE POOLED IN A NARROW RIBBON EAST OF
THE TROF FROM SW KS INTO SC NEB. SATELLITE SHOWS CLUSTER OF HIGH
BASED CONVECTION SE NEB ACROSS NRN MO. H7 SHORT WAVE BARELY
DISCERNIBLE IN 12Z ANAL BUT INDENTIFIED BETTER ON PROFILERS APPEARS
TO BE THE PRIMARY CAUSE OF THE CONVECTION.

FORECAST THROUGH ABOUT NOON WEDNESDAY APPEARS STRAIGHT FORWARD WITH
LOW LEVEL WARM ADVECTION ON INCREASING SOUTHERLY FLOW AHEAD OF
APPROACHING FRONT/LOW. UPR FLOW REMAINS NORTHWEST WITH NO APPARENT
ADDITIONAL WAVES. SO DRY...WARMER AND WINDIER FORECAST LOOKS RIGHT.
MOS TEMPS LOOK REASONABLE IN GENERAL. MIXING FROM INCREASING WIND
OVERNIGHT SHOULD KEEP READINGS UP A BIT OVERNIGHT.

NEXT SIGNIFICANT UPPER WAVE WAS APPROACHING PACIFIC NORTHWEST WITH
12Z H5 ANALYSIS SHOWING 60M HGT FALLS. MODELS IN ACCORD TAKING THIS
WAVE ACROSS NRN STATES AND SRN CANADA...AND DAMPENING WRN STATES
RIDGE. ZONAL UPPER FLOW TO RESULT ACROSS CENTRAL PLAINS BY WED
AFTERNOON.

SURFACE REFLECTION OF THIS SYSTEM IS A FRONT FORECAST TO CROSS GID
CWA WED NIGHT. AVN IS SIGNIFICANTLY SLOWER WITH THIS SFC SYSTEM AT
36 HOURS AND ETA/NGM SOLUTIONS ON SIMILAR CASES HAVE BEEN SUPERIOR.
INCREASING INSTABILITY AND MOISTURE IN WARM SECTOR AHEAD OF FRONT
MAY LEAD TO WIDESPREAD AND SEVERE STORMS WEDNESDAY EVENING.  WILL
INCLUDE CHANCE FOR AFTERNOON CONVECTION INTO NORTHWEST GID CWA ABT
4PM WED AND SPREAD IT SOUTHEAST. POPS IN LIKELY CATEGORY ACROSS NEB
ZONES WED NIGHT...WITH 40 PCT IN KS.

ZONAL FLOW AND STALLING FRONT LEAD TO PERSISTENT CONVECTIVE EVENT
THURSDAY THROUGH FRIDAY. ISENTROPIC LIFT OVER FRONT...DYNAMICS IN
ZONAL UPPER FLOW AND CONTINUOUS FEED OF LOW LEVEL MOISTURE ALL LEAD
TOWARD A SIGNIFICANT RAIN EVENT THURSDAY NIGHT INTO FRIDAY.  HIGH
POPS APPEAR THE WAY TO GO.

MRF & AVN HOLD FRONT AND ZONAL FLOW IN PLACE FRIDAY WITH NEXT WAVE
TO TURN UPPER FLOW TO THE NW AND SFC HIGH TO DRIVE FRONT INTO
SRN KS/OK BY SATURDAY MORNING. AFTER BRIEF UPPER RIDGING AND FAIR
WEATHER SATURDAY...TSTMS RETURN TO FORECAST LATE SUN THROUGH TUES.
NEXT IN SERIES OF UPPER SYSTEMS AGAIN EXPECTED TO FLATTEN THE RIDGE
AND SEND LOW/FRONT ACROSS NEB & KS PRIMARILY SUNDAY AND MONDAY.
SHOWERS MAY LINGER INTO TUESDAY.

.GID...NONE.

SCHURR

In the hours before

Local storm report, May 8, 4:59 PM CDT, 49 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE HASTINGS NE
459 PM CDT TUE MAY 08 2001

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

0450 PM    3 S NELSON                NE    .75 INCH HAIL
05/08/01   NUCKOLLS

Local storm report, May 8, 5:18 PM CDT, 30 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE HASTINGS NE
518 PM CDT TUE MAY 08 2001

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

0514 PM    2 W HARDY                 NE    .75 INCH HAIL
05/08/01   NUCKOLLS

The office that day

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

Issued	Product	Office	Counties	Lasted
May 8, 4:42 PM CDT	Severe Thunderstorm Warning	GID	Nuckolls	48 min
May 8, 5:46 PM CDT	Severe Thunderstorm Warning	GID	Nuckolls	44 min
May 8, 6:33 PM CDT	Severe Thunderstorm Warning	GID	Clay	27 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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive.