Alert archive / Texas / Tornado Watches in 2008
Tornado Watch 89
The Storm Prediction Center issued this tornado watch at Mar 3, 2008, 1:57 AM CST for 32 counties in Texas. It was in force for 6 hr.
The area
The outline as issued.
The facts
- Issued
- Mar 3, 2008, 1:57 AM CST (07:57 UTC)
- Expired
- Mar 3, 2008, 7:55 AM CST
- In force
- 6 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 1.5 in
- Strongest gust expected
- 60 kt
All 32 counties
Anderson County, TX, Bell County, TX, Bosque County, TX, Collin County, TX, Comanche County, TX, Coryell County, TX, Dallas County, TX, Delta County, TX, Ellis County, TX, Falls County, TX, Fannin County, TX, Freestone County, TX, Hamilton County, TX, Henderson County, TX, Hill County, TX, Hopkins County, TX, Hunt County, TX, Johnson County, TX, Kaufman County, TX, Lamar County, TX, Lampasas County, TX, Leon County, TX, Limestone County, TX, McLennan County, TX, Milam County, TX, Mills County, TX, Navarro County, TX, Rains County, TX, Robertson County, TX, Rockwall County, TX, Somervell County, TX, Van Zandt County, TX
The radar
The Dallas/Ft Worth radar (KFWS), 59 km from the middle of the area, began a volume at 07:57 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.
What SPC expected
The probabilities SPC published with the watch, for the watch area over its life.
- Two or more tornadoes
- 30%
- One or more EF2 to EF5 tornadoes
- 10%
- Ten or more severe wind reports
- 40%
- One or more gusts of 65 knots or more
- 10%
- Ten or more severe hail reports
- 40%
- One or more hailstones of 2 inches or more
- 10%
- Six or more combined severe hail and wind reports
- 70%
Warnings issued inside it
4 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Mar 3, 4:58 AM CST | Severe Thunderstorm Warning | FWD | Bell, Falls, Limestone, McLennan | 62 min |
| Mar 3, 5:38 AM CST | Severe Thunderstorm Warning | FWD | Freestone, Navarro | 67 min |
| Mar 3, 5:59 AM CST | Severe Thunderstorm Warning | FWD | Anderson, Henderson | 61 min |
| Mar 3, 6:14 AM CST | Severe Thunderstorm Warning | FWD | Van Zandt | 46 min |
Discussions around it
SPC mesoscale discussions over the same counties from four hours before the watch to its end.
The nearest sounding before it
Fort Worth, TX (KFWD), launched 00:00Z, 8.0 hours before the alert went out and 86 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.
- Mixed-layer CAPE
- 1534 J/kg
- Mixed-layer CIN
- -3 J/kg
- Mixed-layer LCL
- 836 m above ground
- 0-6 km bulk shear
- 41 kt
- 0-1 km storm-relative helicity
- 210 m²/s²
- 0-3 km storm-relative helicity
- 335 m²/s²
- Significant tornado parameter
- 2.3
- Supercell composite
- 10.5
The text
As transmitted, in the capitals the NWS used until 2016.
000
WWUS20 KWNS 030800
SEL9
SPC WW 030800
TXZ000-031500-
URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 89
NWS STORM PREDICTION CENTER NORMAN OK
155 AM CST MON MAR 3 2008
THE NWS STORM PREDICTION CENTER HAS ISSUED A
TORNADO WATCH FOR PORTIONS OF
CENTRAL AND NORTH TEXAS
EFFECTIVE THIS MONDAY MORNING FROM 155 AM UNTIL 900 AM CST.
TORNADOES...HAIL TO 1.5 INCHES IN DIAMETER...THUNDERSTORM WIND
GUSTS TO 70 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE
AREAS.
THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 75 STATUTE
MILES EAST AND WEST OF A LINE FROM 20 MILES WEST SOUTHWEST OF
TEMPLE TEXAS TO PARIS TEXAS. FOR A COMPLETE DEPICTION OF THE
WATCH SEE THE ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU9).
REMEMBER...A TORNADO WATCH MEANS CONDITIONS ARE FAVORABLE FOR
TORNADOES AND SEVERE THUNDERSTORMS IN AND CLOSE TO THE WATCH
AREA. PERSONS IN THESE AREAS SHOULD BE ON THE LOOKOUT FOR
THREATENING WEATHER CONDITIONS AND LISTEN FOR LATER STATEMENTS
AND POSSIBLE WARNINGS.
OTHER WATCH INFORMATION...THIS TORNADO WATCH REPLACES TORNADO
WATCH NUMBER 85. WATCH NUMBER 85 WILL NOT BE IN EFFECT AFTER 155
AM CST. CONTINUE...WW 87...WW 88...
DISCUSSION...QLCS WITH EMBEDDED SUSTAINED STORMS/SUPERCELLS SHOULD
CONTINUE GENERALLY SEWD THROUGH LATE THIS MORNING...WHILE INDIVIDUAL
STORMS MOVE ENE WITHIN IT. BEHAVIOR OF EXISTING STORMS SUGGESTS
PRESENCE OF A CAP...OR AT LEAST APPRECIABLE CIN...IN WARM SECTOR
AHEAD OF CONVECTIVE SYSTEM. THIS SHOULD KEEP NEW DEVELOPMENT
CONFINED TO ZONE OF UPLIFT ALONG SYSTEM GUST FRONT. WHILE THIS
SHOULD LIMIT OVERALL POTENTIAL FOR TORNADOES...ARRIVAL OF STRONGER
DEEP WIND FIELD LATER THIS MORNING /AS NM UPR LOW CONTINUES
EWD/...AND FAIRLY RICH MOISTURE INFLOW...SUGGEST ENOUGH POTENTIAL
FOR ISOLATED TORNADOES TO EXTEND EXISTING TORNADO WATCH IN TIME AND
EWD EXTENT.
AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL
SURFACE AND ALOFT TO 1.5 INCHES. EXTREME TURBULENCE AND SURFACE
WIND GUSTS TO 60 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO
500. MEAN STORM MOTION VECTOR 25040.
...CORFIDISPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Mar 2, 6:05 PM CST | Tornado Watch | SPC | Bosque, Callahan, Collin, Comanche, Cooke, Dallas and 28 more | 8 hr |
| Mar 2, 8:01 PM CST | Mesoscale Discussion | SPC | Collin, Delta, Fannin, Franklin, Grayson, Hopkins and 4 more | 59 min |
| Mar 2, 8:23 PM CST | Tornado Watch | SPC | Bowie, Camp, Cass, Franklin, Morris, Red River and 3 more | 8 hr |
| Mar 2, 11:04 PM CST | Mesoscale Discussion | SPC | Brown, Callahan, Coke, Coleman, Comanche, Concho and 12 more | 56 min |
| Mar 2, 11:27 PM CST | Severe Thunderstorm Watch | SPC | Brown, Coke, Coleman, Concho, Crockett, Irion and 13 more | 5 hr |
| Mar 3, 1:36 AM CST | Mesoscale Discussion | SPC | Anderson, Bell, Bosque, Bowie, Burnet, Camp and 31 more | 54 min |
| Mar 3, 3:01 AM CST | Mesoscale Discussion | SPC | Bowie, Camp, Cass, Franklin, Harrison, Marion and 4 more | 89 min |
| Mar 3, 3:24 AM CST | Mesoscale Discussion | SPC | Bastrop, Blanco, Brazos, Burleson, Burnet, Grimes and 9 more | 96 min |
| Mar 3, 5:21 AM CST | Mesoscale Discussion | SPC | Anderson, Angelina, Bowie, Brazos, Burleson, Camp and 28 more | 84 min |
| Mar 3, 6:47 AM CST | Severe Thunderstorm Watch | SPC | Angelina, Austin, Bowie, Brazoria, Brazos, Burleson and 43 more | 6 hr |
| Mar 3, 10:18 AM CST | Mesoscale Discussion | SPC | Angelina, Austin, Bowie, Brazoria, Brazos, Burleson and 43 more | 87 min |
| Mar 3, 10:36 AM CST | Tornado Watch | SPC | Hardin, Jasper, Jefferson, Newton, Orange, Sabine and 3 more | 9 hr |
Nearby
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.