Alert archive / Nebraska / Severe Thunderstorm Warnings in 2002

Severe Thunderstorm Warning 191, NWS Hastings, NE

August 4, 2002Valley County, Nebraska

NWS Hastings, NE issued this severe thunderstorm warning at Aug 4, 2002, 8:05 PM CDT for Valley County, Nebraska. It was in force for 40 min. 2 reports 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 4, 2002, 8:05 PM CDT (01:05 UTC)
Expired
Aug 4, 2002, 8:45 PM CDT
In force
40 min
Issued by
NWS Hastings, NE
Area
Counties, with a storm outline in the text

County Valley County, NE

What was reported inside it

TimeReportWhereRemark
Aug 4, 8:10 PM CDTHail 1.75Comstock, NE
Aug 4, 8:15 PM CDTHail 0.75Ord, 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.

Did it verify

Not verified. The Iowa Environmental Mesonet's Cow found no qualifying storm report inside this severe thunderstorm warning while it was in force. That is not proof nothing happened: reports are thin where few people live.

Cow counts a report within 15 km of the polygon while the warning was in force: a tornado for a tornado warning; hail of 1 inch or more, a gust of 58 mph or more or wind damage for a severe thunderstorm warning; a flash flood report for a flash flood warning.

The nearest sounding before it

N. Platte/Lee Bi, NE (KLBF), launched 00:00Z, 1.1 hours before the alert went out and 140 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-pSkew-T log-p diagram, N. Platte/Lee Bi, NE at 00:00Z on 2002-08-05Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2151 joules per kilogram.LCLEL10008507005003002001001 km2 km3 km6 km9 km12 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, N. Platte/Lee Bi, NE at 00:00Z on 2002-08-05The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 1 square meters per square second.1939Sfc1 km3 km6 km9 kmRMLM
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
2151 J/kg
Mixed-layer CIN
-9 J/kg
Mixed-layer LCL
1781 m above ground
0-6 km bulk shear
25 kt
0-1 km storm-relative helicity
1 m²/s²
0-3 km storm-relative helicity
127 m²/s²
Significant tornado parameter
0.2
Supercell composite
5.3

Open this sounding in Storm Lab

The text

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

887 
WUUS53 KGID 050105
SVRGRI
NEC175-050145-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE HASTINGS NE
804 PM CDT SUN AUG 4 2002

THE NATIONAL WEATHER SERVICE IN HASTINGS HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  VALLEY COUNTY IN CENTRAL NEBRASKA

* UNTIL 845 PM CDT

* AT 804 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  LINE OF SEVERE THUNDERSTORMS FROM 14 MILES SOUTHWEST OF ELYRIA TO 8
  MILES SOUTH OF ORD...OR FROM 25 MILES EAST OF BROKEN BOW TO 38
  MILES EAST OF BROKEN BOW...MOVING NORTH AT 25 MPH.

* SEVERE THUNDERSTORMS WILL BE NEAR...
  ORD AT 815 PM CDT
  ELYRIA AT 825 PM CDT
  FORT HARTSUFF STATE PARK AT 835 PM CDT

PEOPLE IN VALLEY COUNTY SHOULD SEEK SHELTER IN A STURDY STRUCTURE AND
STAY AWAY FROM WINDOWS.

THE PRIMARY SEVERE WEATHER THREATS ARE STRONG AND DAMAGING WINDS IN 
EXCESS OF 60 MPH AND HAIL THE SIZE OF DIMES.

LAT...LON 4153 9935 4140 9918 4177 9861 4196 9886

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 Aug 4, 2:10 PM CDT, 5 hours 55 minutes earlier.

Area forecast discussion, Aug 4, 2:10 PM CDT, 5 hours 55 minutes before
SOUTH CENTRAL NEBRASKA/NORTH CENTRAL KANSAS FORECAST DISCUSSION
NATIONAL WEATHER SERVICE HASTINGS NE
210 PM CDT SUN AUG 4 2002

POSITION OF SFC BOUNDARY AND RESULTANT POPS ARE THE QN OF THE DAY.
AS OF 18Z...BOUNDARY WAS ANALYZED AS A WARM FRONT RUNNING FROM NR
LXN TO JUST N OF JYR.  18Z TEMPS TO THE S WERE IN THE LOW AND MID
90S F WITH ARND 100 F OVR THE KS CWA.  ALL OCCURRING UNDR AN
ELONGATED RIDGE FM KS ACRS THE OHIO VALLEY...OFFSET BY LOW SPINNING
OVR VANCOUVER ISLAND.

WND FIELD IS WEAK AND MSTR IS PLENTIFUL ON THE SNDINGS.  WITH AFTN
HIGHS NR CONVECTIVE TEMPS...MINIMAL FORCING WL BE NEEDED TO POP SOME
SLOW MOVG +RA PRODUCERS.  THE MORE DIFFICULT QN MAY BE FOR THE
OVRNGT HRS AS THE LACK OF A HEALTHY LLVL JET MAY NOT OVERCOME THE
WARM MID LVLS.  WL FOCUS 1ST PD POPS MORE N AND W WITH THE FRONT
THAN ONGOING FORECAST AND LIMIT KS TO SLGT CHC THIS EVE AS PER DVLPG
CU FIELD DOWN YONDER.

AT ANY RATE...OVRNGT CONVECTION OVR NERN NEB SHOULD BE ENUF TO SHOVE
THE BNDRY SWD AGAIN WITH OUTFLOW TO LIMIT MON HIGH TEMPS FOR THE
EXTREME NRN ZONES...AND PRVD FOCUS FOR EARLY EVE TSRA.  WL ADJUST
MON HIGHS UPWARD BASED ON TDAS EXPERIENCE AND INSERT A SLGT CHC TSRA
FOR THE EVE HRS OVR THOSE NRN ZONES.  LIMITING VARIABLE FOR ANY
HIGHER POPS IS THE BLDG RIDGE/WARMING MID LVL TEMPS AS PER META -4 C
500 MB PROGNOSIS.

MDLS IN GENL AGRMT WITH AMPLIFYING PATN AS LOW DIGS TWD THE PAC NW.
WL BUMP TEMPS UP TO THE 95 TO 100 RANGE OVR THE CWA FOR MUCH OF THE
WEEK AND WL NOT BUY INTO AVN/MRF SOLN OF A STRONG CDFNT BY WEEKS
END.  WL ASSUME THE ECMWF MORE SUMMERTIME SCENARIO OF A NRN PLNS SYS
FOR THIS ISSUANCE WITH WEAK FRONT SAGGING INTO THE NEB ZONES.  WL
INTRO A PCPN MENTION FOR THE NEB CNTIES FOR THE FRI NGT/SAT PDS WITH
ONLY A SLGT COOLING OF TEMPS AND SEE WHAT HAPPENS.

.GID...NONE.

9

In the hours before

Local storm report, Aug 4, 7:45 PM CDT, 20 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE HASTINGS NE
745 PM CDT SUN AUG 04 2002

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

0730 PM    DANNEBROG                 NE   60 MPH TSTM GUST
08/04/02   HOWARD                         60 MPH WINDS FROM ELBA
                                          TO DANNEBROG. REPORTED
                                          BY LAW ENFORCEMENT
                                          OFFICIAL.
Local storm report, Aug 4, 8:03 PM CDT, 2 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE HASTINGS NE
803 PM CDT SUN AUG 04 2002

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

0750 PM    WOLBACH                   NE   60 MPH TSTM GUST
08/04/02   GREELEY                        REPORTED BY STORM
                                          SPOTTER.

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 4, 7:39 PM CDTSevere Thunderstorm WarningGIDGreeley, Howard, Merrick, Nance66 min

Nearby

Severe Thunderstorm Warnings in Nebraska, 2002Every severe thunderstorm warning in 2002

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.