Alert archive / Texas / Severe Thunderstorm Watches in 2004
Severe Thunderstorm Watch 539
The Storm Prediction Center issued this severe thunderstorm watch at Jul 3, 2004, 4:05 AM CDT for 28 counties in Texas. It was in force for 4 hr.
The area
The outline as issued.
The facts
- Issued
- Jul 3, 2004, 4:05 AM CDT (09:05 UTC)
- Expired
- Jul 3, 2004, 8:00 AM CDT
- In force
- 4 hr
- Issued by
- the Storm Prediction Center
All 28 counties
Camp County, TX, Clay County, TX, Collin County, TX, Cooke County, TX, Dallas County, TX, Delta County, TX, Denton County, TX, Ellis County, TX, Fannin County, TX, Franklin County, TX, Grayson County, TX, Gregg County, TX, Henderson County, TX, Hopkins County, TX, Hunt County, TX, Johnson County, TX, Kaufman County, TX, Lamar County, TX, Montague County, TX, Rains County, TX, Rockwall County, TX, Smith County, TX, Tarrant County, TX, Titus County, TX, Upshur County, TX, Van Zandt County, TX, Wise County, TX, Wood County, TX
Warnings issued inside it
2 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 3, 4:24 AM CDT | Severe Thunderstorm Warning | FWD | Grayson | 66 min |
| Jul 3, 4:44 AM CDT | Severe Thunderstorm Warning | FWD | Denton | 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, 9.1 hours before the alert went out and 112 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
- 3016 J/kg
- Mixed-layer CIN
- -77 J/kg
- Mixed-layer LCL
- 1345 m above ground
- 0-6 km bulk shear
- 30 kt
- 0-1 km storm-relative helicity
- 60 m²/s²
- 0-3 km storm-relative helicity
- 198 m²/s²
- Significant tornado parameter
- 0.4
- Supercell composite
- 4.6
The text
As transmitted, in the capitals the NWS used until 2016.
000
WWUS20 KWNS 030906
SEL9
SPC WW 030905
TXZ000-031300-
URGENT - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WATCH NUMBER 539
NWS STORM PREDICTION CENTER NORMAN OK
405 AM CDT SAT JUL 3 2004
THE NWS STORM PREDICTION CENTER HAS ISSUED A
SEVERE THUNDERSTORM WATCH FOR PORTIONS OF
NORTH TEXAS
EFFECTIVE THIS SATURDAY MORNING FROM 405 AM UNTIL 800 AM CDT.
HAIL TO 1.5 INCHES IN DIAMETER...THUNDERSTORM WIND GUSTS TO 70
MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS.
THE SEVERE THUNDERSTORM WATCH AREA IS ALONG AND 90 STATUTE MILES
EAST AND WEST OF A LINE FROM 65 MILES NORTH OF DALLAS TEXAS TO 30
MILES WEST SOUTHWEST OF TYLER TEXAS.
REMEMBER...A SEVERE THUNDERSTORM WATCH MEANS CONDITIONS ARE
FAVORABLE FOR 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. SEVERE THUNDERSTORMS CAN AND OCCASIONALLY DO PRODUCE
TORNADOES.
OTHER WATCH INFORMATION...CONTINUE...WW 538...
DISCUSSION...THUNDERSTORM CLUSTER NOW CROSSING THE RED RIVER SEEMS
TO HAVE DEVELOPED A SUFFICIENTLY DEEP COLD POOL /PER FDK VWP/ TO
ALLOW FOR CONTINUED FORWARD PROPAGATION INTO N TX FOR ANOTHER 2-3
HRS. GIVEN DEGREE OF INSTABILITY PRESENT ABOVE CAP...POTENTIAL WILL
LIKELY CONTINUE FOR HIGH WIND AND HAIL. OTHER STORMS MAY FORM IN
WARM ADVECTION AREA E OF MAIN STORM CLUSTER...AND POSE A THREAT FOR
HAIL AS THEY MOVE SE WITH MEAN NWLY FLOW.
AVIATION...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 30035.
...CORFIDI
334,0951 320,0941 320,0972 334,0982SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 2, 7:17 PM CDT | Mesoscale Discussion | SPC | Archer, Baylor, Callahan, Childress, Collingsworth, Cottle and 17 more | 88 min |
| Jul 2, 7:51 PM CDT | Mesoscale Discussion | SPC | Carson, Gray, Hansford, Hutchinson, Moore, Ochiltree and 3 more | 84 min |
| Jul 2, 9:19 PM CDT | Mesoscale Discussion | SPC | Carson, Gray, Hansford, Hemphill, Hutchinson, Lipscomb and 5 more | 56 min |
| Jul 3, 1:01 AM CDT | Mesoscale Discussion | SPC | Wichita | 89 min |
| Jul 3, 1:15 AM CDT | Severe Thunderstorm Watch | SPC | Archer, Baylor, Clay, Cooke, Foard, Hardeman and 4 more | 6 hr |
| Jul 3, 3:32 AM CDT | Mesoscale Discussion | SPC | Archer, Baylor, Clay, Collin, Cooke, Dallas and 12 more | 118 min |
| Jul 3, 6:15 AM CDT | Mesoscale Discussion | SPC | Bowie, Camp, Cass, Collin, Cooke, Dallas and 28 more | 60 min |
Nearby
Severe Thunderstorm Watches in Texas, 2004Every severe thunderstorm watch in 2004
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.