Alert archive / Nebraska / Severe Thunderstorm Warnings in 1997

Severe Thunderstorm Warning 193, NWS North Platte, NE

August 21, 1997Garfield County, Nebraska

NWS North Platte, NE issued this severe thunderstorm warning at Aug 21, 1997, 2:19 PM CDT for Garfield County, Nebraska. It was in force for 31 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: Aug 21, 1997, 2:19 PM CDT (19:19 UTC)
Expired: Aug 21, 1997, 2:50 PM CDT
In force: 31 min
Issued by: NWS North Platte, NE
Area: Whole counties

County Garfield County, NE

What was reported inside it

Time	Report	Where	Remark
Aug 21, 2:30 PM CDT	Hail 1.75	Burwell, 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

N. Platte/Lee Bi, NE (KLBF), launched 12:00Z, 7.3 hours before the alert went out and 160 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: 969 J/kg
Mixed-layer CIN: -157 J/kg
Mixed-layer LCL: 1037 m above ground
0-6 km bulk shear: 45 kt
0-1 km storm-relative helicity: 251 m²/s²
0-3 km storm-relative helicity: 348 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 2.8

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KLBF 211921 RRA
SVRLBF
NEC071-211950-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING  ...COR FOR COUNTY
NATIONAL WEATHER SERVICE NORTH PLATTE NE
219 PM CDT THU AUG 21 1997

THE NATIONAL WEATHER SERVICE IN NORTH PLATTE NE HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 250 PM CDT
FOR PEOPLE IN THE FOLLOWING LOCATION...

IN NORTH CENTRAL NEBRASKA

   ...SOUTHERN GARFIELD COUNTY

AT 216 PM CDT...A SEVERE THUNDERSTORM WAS INDICATED BY NORTH PLATTE
DOPPLER RADAR 43 MILES NORTHEAST OF BROKEN BOW OR 18 MILES EAST
NORTHEAST OF TAYLOR MOVING SOUTH SOUTHEAST AT 30 MPH.

THIS STORM IS EXPECTED TO PASS NEAR BURWELL BY 230 PM CDT.
IF YOU ARE CAUGHT OUTSIDE...SEEK SHELTER FROM THE STORM IN A
STRONG BUILDING.  DAMAGING WIND...LARGE HAIL...VERY HEAVY RAIN AND
DEADLY LIGHTNING ARE ALL POSSIBLE IN SEVERE THUNDERSTORMS.  STAY
INSIDE AWAY FROM WINDOWS UNTIL THE STORM HAS PASSED.

S. MUTCHLER

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 North Platte, NE wrote its last area forecast discussion before this severe thunderstorm warning went out at Aug 21, 3:57 AM CDT, 10 hours 22 minutes earlier.

Area forecast discussion, Aug 21, 3:57 AM CDT, 10 hours 22 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE NORTH PLATTE NE
356 AM CDT (256 AM MDT) THU AUG 21 1997

UPDATED...

TSRA DVLPG QUICKLY IN AREA OF STRONG ISENTROPIC LIFT AS SEEN ON 3Z
RUC. THIS IN 309-312K LAYER. 700-500 THTA-E ANLYSIS ALSO SHOWS THE
POTENTIAL INSTABILITY WITH ELEVATED CONVECTION. WITH ISENTROPIC
CONTINUING INTO THE MORNING...SCT TSRA NEEDED IN UPCOMING ZONES...

THIS SITUATION MAY BE SIMILAR TO SPC DISC FOR SC KS...AND WILL
HAVE TO WATCH FOR TRAINING....

STOPPKOTTE

In the hours before

Local storm report, Aug 21, 8:56 AM CDT, 5 hours 23 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE  NORTH PLATTE NE
856 AM CDT THU AUG 21 1997

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

0530 AM    5 SSE JOHNSTON            NE   0.75 INCH HAIL
08/21/97   BROWN

0645 AM    2 SE BREWSTER             NE   0.75 INCH HAIL
08/21/97   BLAINE

0715 AM    9 NNE BROKEN BOW          NE   1.00 INCH HAIL
08/21/97   CUSTER

SP

Local storm report, Aug 21, 8:58 AM CDT, 5 hours 21 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE  NORTH PLATTE NE
856 AM CDT THU AUG 21 1997

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

0530 AM    5 SSE JOHNSTON            NE   0.75 INCH HAIL
08/21/97   BROWN

0645 AM    2 SE BREWSTER             NE   0.75 INCH HAIL
08/21/97   BLAINE

0715 AM    9 NNE BROKEN BOW          NE   1.00 INCH HAIL
08/21/97   CUSTER

SP

Local storm report, Aug 21, 9:11 AM CDT, 5 hours 8 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE  NORTH PLATTE NE
911 AM CDT THU AUG 21 1997

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

0730 AM    2 E WOOD LAKE             NE   1.25 INCH HAIL
08/21/97   CHERRY

BOWMAN

Local storm report, Aug 21, 9:13 AM CDT, 5 hours 6 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE  NORTH PLATTE NE
911 AM CDT THU AUG 21 1997

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

073l0 AM    2 E WOOD LAKE             NE   1.25 INCH HAIL
08/21/97   CHERRY

BOWMAN

Special weather statement, Aug 21, 11:03 AM CDT, 3 hours 16 minutes before

NEZ004>010-022>029-035>038-056>059-069>071-221200-

SEVERE WEATHER OUTLOOK FOR WESTERN AND NORTH CENTRAL NEBRASKA
NATIONAL WEATHER SERVICE NORTH PLATTE NE
1102 AM CDT (1002 AM MDT) THU AUG 21 1997

THIS OUTLOOK PERTAINS TO THE FOLLOWING NEBRASKA COUNTIES...

ARTHUR     BLAINE     BOYD       BROWN      CHASE      CHERRY
CUSTER     DEUEL      FRONTIER   GARDEN     GARFIELD   GRANT
HAYES      HOLT       HOOKER     KEITH      KEYA PAHA  LINCOLN
LOGAN      LOUP       MCPHERSON  PERKINS    ROCK       SHERIDAN
THOMAS     WHEELER

...STORM SPOTTER ACTIVATION MAY BE NEEDED IN PARTS OF NORTH CENTRAL
AND WESTERN NEBRASKA LATE THIS AFTERNOON AND TONIGHT...

THERE IS A SLIGHT CHANCE FOR SEVERE THUNDERSTORMS LATE THIS AFTERNOON
AND TONIGHT...WEST OF A LINE FROM AINSWORTH TO BROKEN BOW. WIDELY
SCATTERED THUNDERSTORMS ARE POSSIBLE ACROSS THE REMAINDER OF THE AREA
BUT ARE NOT EXPECTED TO REACH SEVERE LIMITS.

A DISTURBANCE ALOFT WILL ENTER THE NORTHWESTERN PORTION OF THE OUTLOOK
AREA BY LATE AFTERNOON. IN THE MEANTIME...AN INCREASE IN LOW LEVEL
MOISTURE WILL CONTINUE INTO THE WESTERN HIGH PLAINS. WITH SUFFICIENT
AFTERNOON HEATING...THE ATMOSPHERE WEST OF A LINE FROM AINWORTH TO
BROKEN BOW WILL BECOME EVEN MORE UNSTABLE. A TROUGH OF LOW PRESSURE
DEVELOPING IN THE NORTHWESTERN PART OF THE AREA WILL FOCUS THE MOISTURE
AND INSTABILITY ENABLING THUNDERSTORM DEVELOPMENT BY LATE AFTERNOON. THE
DISTURBANCE ALOFT WILL ENHANCE DEVELOPMENT SO THAT SOME OF THE STRONGER
STORMS COULD PRODUCE LARGE HAIL AND DAMAGING WINDS. THESE THUNDERSTORMS
ARE EXPECTED TO MOVE SOUTHEAST ACROSS THE REST OF THE OUTLOOK AREA DURING
THE NIGHT.

FS

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 20, 7:37 PM CDT	Severe Thunderstorm Warning	LBF	Chase	63 min
Aug 21, 5:24 AM CDT	Severe Thunderstorm Warning	LBF	Brown	46 min
Aug 21, 6:24 AM CDT	Severe Thunderstorm Warning	LBF	Blaine	46 min
Aug 21, 7:00 AM CDT	Severe Thunderstorm Warning	LBF	Custer	65 min
Aug 21, 7:17 AM CDT	Severe Thunderstorm Warning	LBF	Cherry	48 min
Aug 21, 6:16 PM CDT	Severe Thunderstorm Warning	LBF	Deuel, Keith	49 min
Aug 21, 6:30 PM CDT	Severe Thunderstorm Warning	LBF	Keith	50 min
Aug 21, 6:56 PM CDT	Severe Thunderstorm Warning	LBF	Perkins	49 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.