Alert archive / Texas / Severe Thunderstorm Warnings in 2002

Severe Thunderstorm Warning 157, NWS Fort Worth, TX

May 27, 2002Johnson County, Texas

NWS Fort Worth, TX issued this severe thunderstorm warning at May 27, 2002, 3:32 PM CDT for Johnson County, Texas. It was in force for 58 min. 1 report 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: May 27, 2002, 3:32 PM CDT (20:32 UTC)
Expired: May 27, 2002, 4:30 PM CDT
In force: 58 min
Issued by: NWS Fort Worth, TX
Area: Counties, with a storm outline in the text

County Johnson County, TX

The radar

The Dallas/Ft Worth radar (KFWS), 16 km from the middle of the area, began a volume at 20:32 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
May 27, 4:06 PM CDT	Thunderstorm Wind	Bono, TX	A barn was destroyed by high winds,a mobile home was unroofed, and trees were uprooted.

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 watch it was issued in

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

Issued	Product	Office	Lasted
May 27, 12:30 PM CDT	Severe Thunderstorm Watch	SPC	7 hr

The nearest sounding before it

Fort Worth, TX (KFWD), launched 12:00Z, 8.5 hours before the alert went out and 44 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: 525 J/kg
Mixed-layer CIN: -221 J/kg
Mixed-layer LCL: 1185 m above ground
0-6 km bulk shear: 25 kt
0-1 km storm-relative helicity: -64 m²/s²
0-3 km storm-relative helicity: 25 m²/s²
Significant tornado parameter: 0.0
Supercell composite: -0.4

Open this sounding in Storm Lab

The text

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

000 
WUUS54 KFWD 272032
SVRFTW
TXC251-272130-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE FORT WORTH TX
330 PM CDT MON MAY 27 2002

THE NATIONAL WEATHER SERVICE IN FORT WORTH HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  JOHNSON COUNTY IN NORTH CENTRAL TEXAS

* UNTIL 430 PM CDT

* AT 330 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR DETECTED A
  SEVERE THUNDERSTORM 18 MILES WEST OF CLEBURNE...MOVING EAST AT 25
  MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  CLEBURNE AROUND 405 PM CDT
  JOSHUA AROUND 410 PM CDT
  KEENE...ALVARADO AROUND 415 PM CDT

* OTHER LOCATIONS IN THE WARNING INCLUDE BURLESON...GRANDVIEW AND
  VENUS

THIS STORM HAS A HISTORY OF PRODUCING SIGNIFICANT WIND DAMAGE IN 
GRANBURY

HAIL TO THE SIZE OF GOLFBALLS AND WIND GUSTS OF 70 TO 80 MPH ARE 
LIKELY. FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST 
FLOOR OF YOUR HOME OR BUSINESS.

LAT...LON 3255 9762 3224 9762 3223 9709 3259 9711
          3254 9734

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 Fort Worth, TX wrote its last area forecast discussion before this severe thunderstorm warning went out at May 27, 2:29 PM CDT, 1 hour 3 minutes earlier.

Area forecast discussion, May 27, 2:29 PM CDT, 1 hour 3 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE FORT WORTH TX
229 PM CDT MON MAY 27 2002

CHANCE OF THUNDERSTORMS WILL CONTINUE TONIGHT WITH BEST STORMS
ACROSS SOUTH 1/2 OF AREA WHERE THE AIRMASS IS WARMER AND A LITTLE
MORE UNSTABLE.  CHANCE OF THUNDERSTORMS WITH SOME SEVERE ACROSS ALL
OF NORTH TEXAS AGAIN TUESDAY...AS WEAK UPPER LEVEL SYSTEM DRIFTS
SOUTHWARD INTO THE SOUTH PLAINS.  CHANCE OF THUNDERSTORMS WILL
CONTINUE THROUGH THURSDAY AS UPPER LEVEL FLOW BECOMES NORTHERLY WITH
A SERIES OF WEAK UPPER LEVEL DISTURBANCES DROPPING SOUTH INTO WARM
MOIST AND UNSTABLE AIRMASS ACROSS TEXAS.

FCSTID = 59
DFW   69  87  68  87 /  50  30  30  30
ACT   69  89  69  88 /  50  20  20  30

.FWD...NONE.

In the hours before

Special weather statement, May 27, 1:10 PM CDT, 2 hours 22 minutes before

TXZ091>095-100>107-115>123-129>135-141>148-156>162-174-175-272100-

HAZARDOUS WEATHER OUTLOOK FOR NORTH TEXAS
NATIONAL WEATHER SERVICE FORT WORTH TX
110 PM CDT MON MAY 27 2002

THERE IS A MODERATE RISK OF SEVERE THUNDERSTORMS THIS AFTERNOON AND
TONIGHT OVER THAT PART OF NORTH TEXAS NORTHWEST OF A TERRELL...
WACO...TO LAMPASAS LINE. THIS INCLUDES DENTON...STEPHENVILLE...
BRECKENRIDGE..GRANBURY...AND THE DALLAS-FORT WORTH METROPLEX. A
SLIGHT RISK OF SEVERE THUNDERSTORMS EXISTS ACROSS THE REMAINDER OF
NORTH TEXAS THROUGH TONIGHT.

THUNDERSTORMS WILL CONTINUE TO DEVELOP AND MOVE EASTWARD ACROSS
NORTH TEXAS THIS AFTERNOON. THE ATMOSPHERE REMAINS MOIST AND
UNSTABLE AND THUNDERSTORMS WILL HAVE THE POTENTIAL TO BECOME
SEVERE.  IT APPEARS THAT THE GREATEST THREAT FOR SEVERE
THUNDERSTORMS THIS AFTERNOON WILL BE NEAR AND SOUTH OF A
BRECKENRIDGE...STEPHENVILLE...TO HILLSBORO LINE NEAR AN OUTFLOW
BOUNDARY LEFT OVER FROM THUNDERSTORMS THIS MORNING.  LARGE HAIL UP
TO THE SIZE OF GOLFBALLS AND DAMAGING WINDS WILL BE THE PRIMARY
THREATS. SOME AREAS WILL ALSO EXPERIENCE LOCALLY HEAVY RAINFALL.
THE THREAT OF SEVERE THUNDERSTORMS WILL CONTINUE TONIGHT AS AN UPPER
LEVEL DISTURBANCE MOVES ACROSS THE REGION.

SPOTTER GROUPS SHOULD BE PREPARED FOR POSSIBLE ACTIVATION THIS AFTERNOON.
THOSE INVOLVED IN OUTDOOR ACTIVITIES...ESPECIALLY ON AREA LAKES...
SHOULD REMAIN ALERT TO THE SIGNS OF APPROACHING STORMS. STAY TUNED
TO NOAA WEATHER RADIO AND OTHER LOCAL MEDIA FOR FURTHER DETAILS OR
UPDATES.

The office that day

Everything else NWS Fort Worth, TX issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
May 27, 12:10 PM CDT	Severe Thunderstorm Warning	FWD	Stephens	65 min
May 27, 2:43 PM CDT	Severe Thunderstorm Warning	FWD	Hood	62 min
May 27, 3:40 PM CDT	Severe Thunderstorm Warning	FWD	Comanche	35 min
May 27, 5:29 PM CDT	Severe Thunderstorm Warning	FWD	Hill, Johnson	61 min
May 27, 6:28 PM CDT	Severe Thunderstorm Warning	FWD	Navarro	62 min

Nearby

Severe Thunderstorm Warnings in Texas, 2002 Every 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; radar from the NEXRAD Level II archive.