Alert archive / Texas / Tornado Warnings in 1999

Tornado Warning 27, NWS Midland/Odessa, TX

May 1, 1999Dawson County, Texas

NWS Midland/Odessa, TX issued this tornado warning at May 1, 1999, 4:56 PM CDT for Dawson County, Texas. It was in force for 34 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline the Iowa Environmental Mesonet reconstructed for it; the warning itself named whole counties.

The facts

Issued
May 1, 1999, 4:56 PM CDT (21:56 UTC)
Expired
May 1, 1999, 5:30 PM CDT
In force
34 min
Issued by
NWS Midland/Odessa, TX
Area
Whole counties; the outline is the Mesonet’s reconstruction

County Dawson County, TX

The radar

The Lubbock radar (KLBB), 96 km from the middle of the area, began a volume at 21:57 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.

The watch it was issued in

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

IssuedProductOfficeLasted
May 1, 3:00 PM CDTSevere Thunderstorm WatchSPC5 hr

The nearest sounding before it

Midland Regional, TX (KMAF), launched 12:00Z, 9.9 hours before the alert went out and 98 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, Midland Regional, TX at 12:00Z on 1999-05-01Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 199 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Midland Regional, TX at 12:00Z on 1999-05-01The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 317 square meters per square second.19395878Sfc1 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
199 J/kg
Mixed-layer CIN
-28 J/kg
Mixed-layer LCL
536 m above ground
0-6 km bulk shear
66 kt
0-1 km storm-relative helicity
317 m²/s²
0-3 km storm-relative helicity
505 m²/s²
Significant tornado parameter
0.0
Supercell composite
4.3

Open this sounding in Storm Lab

The text

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

999 
WFUS1 KMAF 012201 RRA
TORMAF
TXC115-012230-

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE MIDLAND-ODESSA TX
456 PM CDT SAT MAY 1 1999

THE MIDLAND-ODESSA NATIONAL WEATHER SERVICE OFFICE HAS ISSUED A

* TORNADO WARNING FOR...
  WESTERN DAWSON COUNTY IN TEXAS
  THIS INCLUDES THE CITY OF LAMESA

* UNTIL 530 PM CDT

* AT 455 PM CDT...A LAW ENFORCEMENT OFFICER REPORTED A TORNADO 2 MILES
  WEST OF SAND...THAT WAS JUST BEGINNING TO CROSS INTO DAWSON
  COUNTY. THIS AREA WAS ABOUT 17 MILES WEST OF LAMESA. MOVEMENT WAS  
  TO THE NORTHEAST AT 20 MPH. 

* THE THUNDERSTORM WITH THE TORNADO IS EXPECTED TO BE...  
  NEAR SAND AT 505 PM CDT
  7 MILES SOUTHWEST OF PUNKIN CENTER AT 525 PM CDT

IF YOU SPOT A TORNADO...NEVER TRY TO OUTRUN IT IN A CAR. CARS ARE
EASILY TOSSED AROUND BY TORNADO WINDS.

STAY TUNED TO LOCAL MEDIA OUTLETS FOR THE LATEST SEVERE WEATHER
INFORMATION.

A TORNADO WATCH REMAINS IN EFFECT UNTIL 1000 PM CDT SATURDAY EVENING 
FOR DAWSON COUNTY.

LAT...LON 3284 10219 3262 10219 3277 10184 3294 10192
          3292 10211

DJK

What forecasters said that day

The local office's own words before this tornado warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Midland/Odessa, TX wrote its last area forecast discussion before this tornado warning went out at May 1, 1:45 PM CDT, 3 hours 11 minutes earlier.

Area forecast discussion, May 1, 1:45 PM CDT, 3 hours 11 minutes before
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE MIDLAND TX
145 PM CDT SAT MAY 1 1999

BLOCKING PATTERN OVER THE CENTRAL U.S. FINALLY BEGINNING TO BREAK UP.
MAIN CHALLENGE THIS PERIOD IS TO FIGURE OUT THE JUST HOW QUICKLY THE
UPPER LOW WILL LIFT OUT OF THE SWRN US...AND MUCH OF THIS WILL DEPEND
ON THE TIMING AND MOVEMENT OF THE OTHER LOW OFF THE SERN U.S. COAST.
IT LOOKS LIKE THE SERN LOW WILL FINALLY BEGIN TO PROGRESS EWD...AND
THIS SHOULD ALLOW THE LOW TO OUR WEST TO BEGIN LIFTING OUT ON
SUNDAY. FOR TONIGHT...SIGNIFICANT CONVECTION IS THE MAIN CONCERN. I
BELIEVE THE DRYLINE WILL CONTINUE TO ADVANCE EWD THIS AFTERNOON AND
KICK OFF STORMS. WITH THE LOW BEGINNING TO LIFT...I EXPECT A SERIES
OF SHORTWAVES TO EJECT OUT OF THE SYSTEM...AND THIS WILL PROBABLY
KEEP CONVECTION ACTIVE TONIGHT. TOMORROW THE LOW BEGINS TO LIFT...BUT
I STILL EXPECT SOME LINGERING CLOUDS AND PCPN DURING THE MORNING
HOURS. LOOKS LIKE SOME DRIER SFC AIR WILL SWEEP IN FROM THE WEST
DURING THE AFTERNOON TOMORROW AS THE SFC LOW LIFTS NORTH...BUT WINDS
SHOULD QUICKLY SWITCH BACK AROUND TO A SLY OR SELY DIRECTION LATE
SUNDAY NIGHT...AND THEN BECOME MORE SWLY DURING THE DAY ON MONDAY FOR
A BIT OF A WARMUP. UPPER LEVEL FLOW PATTERN ON MONDAY SHOULD BE
NEARLY ZONAL.

PRELIM TEMPS/POPS...
MAF 52/78/53/85 4200
CNM 52/81/52/87 3100
MRF 45/77/45/80 2100
P07 58/79/56/86 3100

DJK

The office that day

Everything else NWS Midland/Odessa, TX issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Apr 30, 7:16 PM CDTFlash Flood WarningMAFGaines3 hr
Apr 30, 7:36 PM CDTSevere Thunderstorm WarningMAFGaines39 min
Apr 30, 9:58 PM CDTFlash Flood WarningMAFDawson, Gaines107 min
Apr 30, 10:19 PM CDTFlash Flood WarningMAFDawson101 min
Apr 30, 11:30 PM CDTFlash Flood WarningMAFBorden2 hr
May 1, 2:37 PM CDTTornado WarningMAFAndrews68 min
May 1, 3:20 PM CDTFlash Flood WarningMAFGaines3 hr
May 1, 3:58 PM CDTTornado WarningMAFAndrews, Ector32 min
May 1, 4:06 PM CDTTornado WarningMAFGaines24 min
May 1, 4:25 PM CDTTornado WarningMAFDawson, Gaines35 min
May 1, 4:29 PM CDTTornado WarningMAFAndrews46 min
May 1, 5:36 PM CDTTornado WarningMAFMartin24 min
May 1, 5:56 PM CDTTornado WarningMAFMartin34 min
May 1, 6:30 PM CDTTornado WarningMAFMartin30 min

Nearby

Tornado Warnings in Texas, 1999Every tornado warning in 1999Tornadoes in 1999

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.