Alert archive / Nebraska / Severe Thunderstorm Warnings in 1997

Severe Thunderstorm Warning 49, NWS Hastings, NE

June 20, 1997Hall County, Nebraska

NWS Hastings, NE issued this severe thunderstorm warning at Jun 20, 1997, 4:16 AM CDT for Hall County, Nebraska. It was in force for 14 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: Jun 20, 1997, 4:16 AM CDT (09:16 UTC)
Expired: Jun 20, 1997, 4:30 AM CDT
In force: 14 min
Issued by: NWS Hastings, NE
Area: Whole counties

County Hall County, NE

The radar

The Grand Island radar (KUEX), 62 km from the middle of the area, began a volume at 09:17 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
Jun 20, 4:20 AM CDT	Thunderstorm Wind 60	Grand Is, 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 watch it was issued in

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

Issued	Product	Office	Lasted
Jun 20, 1:00 AM CDT	Severe Thunderstorm Watch	SPC	5 hr

The nearest sounding before it

N. Platte/Lee Bi, NE (KLBF), launched 00:00Z, 9.3 hours before the alert went out and 178 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: 275 J/kg
Mixed-layer CIN: -121 J/kg
Mixed-layer LCL: 3064 m above ground
0-6 km bulk shear: 30 kt
0-1 km storm-relative helicity: 127 m²/s²
0-3 km storm-relative helicity: 156 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.9

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KGRI 200916 RRA
SVRGRI
NEC079-200930-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE HASTINGS NE
416 AM CDT FRI JUN 20 1997
 
THE NATIONAL WEATHER SERVICE IN HASTINGS NE  HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL  430 AM CDT
FOR PEOPLE IN THE FOLLOWING LOCATION...
 
IN SOUTH CENTRAL NEBRASKA
 
   ...HALL COUNTY
 
PEOPLE IN GRAND ISLAND CAN EXPECT WIND GUSTS TO 70 MPH THROUGH 430.
TAKE SHELTER INDOORS AWAY FROM WINDOWS.
 
AT 412...WIND GUSTS TO 65 MPH WERE REPORTED IN CAIRO...15 MILES
NORTHWEST OF GRAND ISLAND.  A COLLAPSING THUNDERSTORM WAS RESPONSIBLE
FOR THE STRONG WINDS PROJECTING OUTWARD FROM IT.  STRONG WINDS ARE
ALSO LIKELY IN ALDA AND NEA:R I80 THROUGH 430.
 
 
 
 
IN SOME CASES...SEVERE THUNDERSTORM WINDS CAN BE AS DESTRUCTIVE AS
TORNADOES.  TAKE SHELTER NOW.
 
KD
 
&

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 Jun 20, 2:30 AM CDT, 1 hour 46 minutes earlier.

Area forecast discussion, Jun 20, 2:30 AM CDT, 1 hour 46 minutes before

CENTRAL NEBRASKA/NORTH CENTRAL KANSAS FORECAST DISCUSSION
NATIONAL WEATHER SERVICE HASTINGS NE
230 AM CDT FRI JUN 20 1997

TSTMS AND TEMPS MAIN CHALLENGES ONCE AGAIN.

CURRENT TSTMS OVER FA HAVE PRODUCED WINDS OF 45-50 MPH...MAINLY SMALL
HAIL AND HVY RAINS.  H7 TEMPS ARE GNRLY 11-14C...QUITE WARM FOR MUCH
IN THE WAY OF LARGE HAIL...BUT PCPN LOADING HAS CREATED THE STRONG
WIND GUSTS.  CURRENT LINE FORMATION OF TSTMS IN SE FA MORE PERPENDIC
TO FLOW AND MAY CAUSE SOME ACCELERATION.  ALTHOUGH GOOD LOW LVL MSTR
CONVG PROGGED ALG WESTERN EDGE OF CONVECTION...PROFS SHOWING LLJ
DIVERTING MOST MSTR NNEWD INTO ERN NEBR...WHERE MOIST TONGUE ALREADY
RESIDES.
WATCH MOST LIKELY TO BE CANCELLED BEFORE OR WITH MORNING ZFP ISSUANCE.
WIL MONITOR FOR MNTN OF AM RAIN.

AS MENTIONED...MOISTURE/INSTAB AXIS JUST EAST OF FA.  BNDRY LIES ACROSS
NRN NEBR.  MODELS SAG IT SOUTH OVER COURSE OF TDA.  DO NOT SEE A
REASON FOR QUICK MOVMNT OF FRONT IN CONTINUED QUICK ZONAL FLOW ALF.
SOME LOWERING OF HGHTS NOTED AT MID LVLS BY PROGS...AND ALSO SLGTLY
EVIDENT ON WV IMGRY.

HWVR...OUTLOW FROM CURRENT CONVECTION LIKELY TO SET UP CONVERGENT
AREA MAY PROVIDE BETTER FOCUS FOR NEXT ROUND OF STORMS THIS AFTN
WITH MAIN FRONT CREATING FOCUS FOR STORMS OVER CNTRL NEBR TNGT.

ANOTHER WARM DAY ON TAP TODAY...HWVR ABOUT 5 DEGREES COOLER THAN THU.
WILL PLACE POPS IN ERN FA THIS AFTN.  FOR TNGT...AFOREMENTIONED
LOWERING HGTS ACCOMPANIED BY COOLER AIR ALF WILL RESULT IN LITTLE
INHIBITION...AND WHEN COMBINED WITH SFC BNDRY...SHOULD YIELD ANOTHER
ROUND OF DECENT CONVECTION.  CAPES OVER 3KJ/KG PROGGED.  DIRECTIONAL
SHEAR AT LOW LVLS MAY RESULT IN INCREASED PROB OF TORNADOES.  ALSO
H3 JET NOW OVER PAC NW WILL BE CROSSING NRN TIER TODAY PLACING GID
IN RRQ TNGT.  THIS WILL ENHANCE LIFT AND GIVEN STRG MSTR CONVG AND
HIGH PWS...LEAD TO HVY RAINS.

SUSPECT SOME RAIN TO LINGER INTO SAT MORNING THEN A COOLER DAY ON TAP
FOR AREA.  TSTMS WILL STILL BE PSBL DURING AFTN ACROSS NRN KS NEAR
SFC BNDRY.  10 DEGREE COOL DOWN SATURDAY OF GUIDANCE IS ACCEPTED.

GRI BB 094/064/082 363
ODX BB 093/063/081 362
LXN BB 095/062/084 151
HBR BB 096/068/084 363
BEL BB 097/070/086 365

DROZD

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 19, 11:28 PM CDT	Severe Thunderstorm Warning	GID	Dawson, Gosper	32 min
Jun 20, 12:02 AM CDT	Severe Thunderstorm Warning	GID	Dawson, Phelps	28 min
Jun 20, 3:44 AM CDT	Severe Thunderstorm Warning	GID	Buffalo	31 min

Nearby

Severe Thunderstorm Warnings in Nebraska, 1997 Every severe thunderstorm warning in 1997

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; radar from the NEXRAD Level II archive.