Alert archive / Texas / Severe Thunderstorm Warnings in 2008

Severe Thunderstorm Warning 172, NWS Fort Worth, TX

April 10, 2008Ellis County, Henderson County, Navarro County, Texas

NWS Fort Worth, TX issued this severe thunderstorm warning at Apr 10, 2008, 4:23 AM CDT for Ellis County, Henderson County, Navarro County, Texas. It was in force for 67 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: Apr 10, 2008, 4:23 AM CDT (09:23 UTC)
Expired: Apr 10, 2008, 5:30 AM CDT
In force: 67 min
Issued by: NWS Fort Worth, TX
Area: Storm-based polygon

Counties Ellis County, TX, Henderson County, TX, Navarro County, TX

The radar

The Dallas/Ft Worth radar (KFWS), 97 km from the middle of the area, began a volume at 09:26 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.

Issued	Product	Office	Lasted
Apr 9, 10:40 PM CDT	Tornado Watch	SPC	7 hr
Apr 10, 3:54 AM CDT	Tornado Watch	SPC	8 hr

The nearest sounding before it

Fort Worth, TX (KFWD), launched 00:00Z, 9.4 hours before the alert went out and 111 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: 2061 J/kg
Mixed-layer CIN: -5 J/kg
Mixed-layer LCL: 537 m above ground
0-6 km bulk shear: 63 kt
0-1 km storm-relative helicity: 237 m²/s²
0-3 km storm-relative helicity: 337 m²/s²
Significant tornado parameter: 4.9
Supercell composite: 22.7

Open this sounding in Storm Lab

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 Apr 10, 3:47 AM CDT, 36 minutes earlier.

Area forecast discussion, Apr 10, 3:47 AM CDT, 36 minutes before

AREA FORECAST DISCUSSION...CORRECTED TYPO
NATIONAL WEATHER SERVICE FORT WORTH TX
347 AM CDT THU APR 10 2008

.DISCUSSION...
SECOND ROUND OF SEVERE STORMS NOW MOVING QUICKLY WEST TO EAST
THROUGH NORTH TEXAS. A STOUT SQUALL LINE EXTENDS FROM NEAR
GAINESVILLE...TO CLEBURNE...TO GATESVILLE. FORWARD SPEED IS AROUND
50 KTS. THIS COMBINED WITH THE WINDS ASSOCIATED WITH THE LINE
ITSELF HAS BEEN CAUSING MAJOR DAMAGE IN THE FORM OF TREES AND
POWER LINES DOWN AS WELL AS SOME STRUCTURAL DAMAGE. REPORTS OF WIND
SPEEDS TO 80 MPH ARE COMMON. HAIL AND TORNADO REPORTS HAVE BEEN
SCARCE...ALTHOUGH A FEW CELLS ARE EXHIBITING ROTATION. THE SEVERE
WEATHER SHOULD BE JUST EAST OF THE CWA COINCIDENT WITH THE
EXPIRATION OF THE TORNADO WATCH AT 6 AM.  NEW TOR WATCH WILL BE
ISSUED FOR THE REMAINDER OF NORTH TEXAS NOT IN THE CURRENT WATCH.
FLASH FLOOD WATCH IS STILL IN EFFECT...ALTHOUGH SPEED OF THE SYSTEM
HAS SO FAR PRECLUDED MANY FLOODING PROBLEMS.

GUIDANCE CONTINUES TO SHOW WIND SPEEDS IN THE 20-30 KT RANGE THIS
AFTERNOON AS THE SURFACE LOW SWINGS TO OUR NORTH. HAVE ALREADY
ISSUED A WIND ADVISORY FOR THE ENTIRE AREA THROUGH 9 PM. GUSTS TO
40 MPH ARE LIKELY THIS AFTERNOON...ESPECIALLY IN THE NORTHERN HALF
OF THE FORECAST AREA. WINDS SHOULD DIE DOWN AS SURFACE LOW PULLS
OFF TO THE NORTHEAST AND PRESSURE GRADIENT RELAXES.

THE REMAINDER OF THE FORECAST LOOKS MUCH TAMER WITH NO POPS IN THE
FORECAST AFTER TODAY. SPRAWLING SURFACE HIGH WILL OCCUPY MUCH OF
THE CENTRAL U.S. INCLUDING NORTH TEXAS THROUGH THE REMAINDER OF
THE 7 DAY FORECAST.

STRONG SOUTHWEST WINDS ALONG WITH CLEARING SKIES SHOULD HELP
TEMPS TODAY REACH THE LOWER 80S AT MOST LOCATIONS. FROPA WILL
OCCUR TOMORROW MORNING KNOCKING HIGH TEMPS BACK INTO THE 60S AND
70S FOR FRIDAY AND SATURDAY. CONTINUED NORTH WINDS ON THE WESTERN
SIDE OF THE DEPARTING LOW PRESSURE SYSTEM ALONG WITH ANOTHER SHOT
OF COLD AIR WILL KEEP TEMPS DOWN SUNDAY AS WELL. MONDAY THROUGH
WEDNESDAY LOOK NICE AS TEMPERATURES REBOUND INTO THE 70S.  SH/13

&&

.PRELIMINARY POINT TEMPS/POPS...
DALLAS-FT. WORTH, TX  81  50  70  46  68 /  20   5   0   0   0
WACO, TX              84  52  75  47  70 /  20   5   0   0   0
PARIS, TX             79  49  68  43  64 /  60  10   0   0   0
DENTON, TX            81  47  70  43  67 /  20   5   0   0   0
MCKINNEY, TX          80  47  69  45  66 /  30   5   0   0   0
DALLAS, TX            82  53  72  47  68 /  20   5   0   0   0
TERRELL, TX           80  53  70  45  65 /  40  10   0   0   0
CORSICANA, TX         83  54  72  46  68 /  30  10   0   0   0
TEMPLE, TX            83  54  74  46  72 /  20   5   0   0   0

&&

.FWD WATCHES/WARNINGS/ADVISORIES...
WIND ADVISORY UNTIL 9 PM CDT THIS EVENING FOR THE FOLLOWING
ZONES:
TXZ091>095-100>107-115>123-129>135-141>148-156>162-174-175.

FLASH FLOOD WATCH UNTIL NOON CDT TODAY FOR THE FOLLOWING ZONES:
TXZ091>095-100>107-115>120-129.

&&

13

Hazardous weather outlook, Apr 9, 9:25 PM CDT, 6 hours 58 minutes before

HAZARDOUS WEATHER OUTLOOK FOR NORTH TEXAS...UPDATED
NATIONAL WEATHER SERVICE FORT WORTH TX
925 PM CDT WED APR 9 2008

TXZ091>095-100>107-115>123-129>135-141>148-156>162-174-175-101100-
ANDERSON-BELL-BOSQUE-COLLIN-COMANCHE-COOKE-CORYELL-DALLAS-DELTA-
DENTON-EASTLAND-ELLIS-ERATH-FALLS-FANNIN-FREESTONE-GRAYSON-HAMILTON-
HENDERSON-HILL-HOOD-HOPKINS-HUNT-JACK-JOHNSON-KAUFMAN-LAMAR-LAMPASAS-
LEON-LIMESTONE-MCLENNAN-MILAM-MILLS-MONTAGUE-NAVARRO-PALO PINTO-
PARKER-RAINS-ROBERTSON-ROCKWALL-SOMERVELL-STEPHENS-TARRANT-VAN ZANDT-
WISE-YOUNG-
925 PM CDT WED APR 9 2008

THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTH TEXAS.

.DAY ONE...TODAY AND TONIGHT.
THERE IS A MODERATE RISK OF SEVERE THUNDERSTORMS NAMELY THOSE
AREAS OF NORTH TEXAS CLOSE TO A SURFACE WARM FRONT NORTH OF
INTERSTATE 20 AND NEAR THE RED RIVER. MAIN HAZARDS THROUGH TONIGHT
WILL BE VERY LARGE HAIL...DAMAGING WINDS...LOCALLY HEAVY RAINFALL
AND A FEW ISOLATED TORNADOES WILL BE POSSIBLE NEAR THESE AREAS.

ELSEWHERE...THUNDERSTORMS WILL CONTINUE TO DEVELOP INTO A SQUALL LINE
OVER WEST TEXAS THROUGH MIDNIGHT...THEN SPREAD EAST INTO NORTH TEXAS
AFTER MIDNIGHT AND THROUGH DAYBREAK THURSDAY MORNING. LARGE HAIL...
HEAVY RAINFALL...FREQUENT LIGHTNING AND WINDS IN EXCESS OF 60 MPH
ARE ALL POSSIBLE WITH THIS ACTIVITY LATE TONIGHT.

A FLASH FLOOD WATCH IS IN EFFECT FOR AREAS ALONG AND NORTH OF
INTERSTATE 20 THROUGH THURSDAY MORNING. ADDITIONAL RAINFALL AMOUNTS
OF 1 TO 3 INCHES WILL BE LIKELY...WITH ISOLATED AMOUNTS UP TO 4
INCHES POSSIBLE.

.DAYS TWO THROUGH SEVEN...THURSDAY THROUGH MONDAY.
A LINE OF STRONG TO SEVERE THUNDERSTORMS IS EXPECTED EARLY THURSDAY
MORNING ALONG AND AHEAD OF AN EASTWARD MOVING COLD FRONT. THE SEVERE
WEATHER THREAT INCLUDES FREQUENT LIGHTNING...DAMAGING WINDS...
AND LARGE HAIL.

THE SEVERE WEATHER THREAT WILL END FROM WEST TO EAST BY THURSDAY
AFTERNOON.

BEHIND THE COLD FRONT...STRONG WESTERLY WINDS OF 25 TO 30 MPH...WITH
GUSTS TO 40 MPH ARE EXPECTED THURSDAY AFTERNOON.

.SPOTTER INFORMATION STATEMENT...
SPOTTER ACTIVATION WILL LIKELY BE NEEDED ACROSS MUCH OF NORTH TEXAS
THROUGH THE OVERNIGHT.

05/

In the hours before

Local storm report, Apr 10, 3:25 AM CDT, 58 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE FORT WORTH TX
325 AM CDT THU APR 10 2008

..TIME..    ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE..    ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0246 AM     TSTM WND GST     MINERAL WELLS           32.82N  98.08W
04/10/2008  E60 MPH          PALO PINTO         TX   PUBLIC

Local storm report, Apr 10, 3:30 AM CDT, 53 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE FORT WORTH TX
330 AM CDT THU APR 10 2008

..TIME..    ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE..    ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0325 AM     TSTM WND GST     FORT WORTH              32.75N  97.34W
04/10/2008  E70 MPH          TARRANT            TX   ASOS

            MEASURED AT MEACHEM AIRPORT (FTW)

Special weather statement, Apr 10, 3:51 AM CDT, 32 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE FORT WORTH TX
351 AM CDT THU APR 10 2008

TXZ158-174-100915-
BELL TX-MILAM TX-
351 AM CDT THU APR 10 2008

...SIGNIFICANT WEATHER ADVISORY FOR...
  SOUTHERN BELL COUNTY
  WEST CENTRAL MILAM COUNTY

AT 351 AM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED A
STRONG THUNDERSTORM 6 MILES SOUTH OF HARKER HEIGHTS...MOVING EAST AT
52 MPH.

CITIES IN THE PATH OF THIS STORM INCLUDE BELTON...HARKER HEIGHTS...
HOLLAND...LITTLE RIVER-ACADEMY...ROGERS AND SALADO.

VERY HEAVY RAIN AND WIND GUSTS TO 50 MPH ARE LIKELY WITH THIS STORM.
IN ADDITION...THE STORM HAS SHOWN PERSISTENT ROTATION AND IF THIS
STRENGTHENS IT MAY PRODUCE A TORNADO.

IF THIS STORM INTENSIFIES...A SEVERE WEATHER WARNING MAY BE NEEDED.

A TORNADO WATCH REMAINS IN EFFECT UNTIL 600 AM CDT THURSDAY MORNING
FOR NORTHEASTERN TEXAS.

LAT...LON 3090 9776 3108 9772 3109 9713 3105 9712
      3103 9709 3101 9709 3100 9707 3071 9712
TIME...MOT...LOC 0851Z 280DEG 45KT 3097 9763

Local storm report, Apr 10, 4:04 AM CDT, 19 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE FORT WORTH TX
404 AM CDT THU APR 10 2008

..TIME..    ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE..    ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0403 AM     TSTM WND GST     MCKINNEY                33.20N  96.65W
04/10/2008  E65 MPH          COLLIN             TX   AMATEUR RADIO

            65MPH WIND IN MCKINNEY ALSO HALF INCH HAIL

Local storm report, Apr 10, 4:06 AM CDT, 17 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE FORT WORTH TX
406 AM CDT THU APR 10 2008

..TIME..    ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE..    ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0404 AM     TSTM WND DMG     5 N STEPHENVILLE        32.29N  98.22W
04/10/2008                   ERATH              TX   LAW ENFORCEMENT

            STRUCTURAL DAMAGE REPORTED 5 MILES NORTH OF STEPHENVILLE
            ALONG 108 AND 426. ALSO NUMEROUS TREES DOWN ACROSS THE
            COUNTY

Local storm report, Apr 10, 4:18 AM CDT, 5 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE FORT WORTH TX
418 AM CDT THU APR 10 2008

..TIME..    ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE..    ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0417 AM     TSTM WND GST     MCKINNEY                33.20N  96.65W
04/10/2008  E87 MPH          COLLIN             TX   AMATEUR RADIO

            EAST SIDE OF MCKINNEY

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 9, 7:13 PM CDT	Tornado Warning	FWD	Jack, Wise	47 min
Apr 9, 7:14 PM CDT	Special Weather Statement	FWD	Fannin	31 min
Apr 9, 7:33 PM CDT	Special Weather Statement	FWD	Cooke, Denton	27 min
Apr 9, 7:48 PM CDT	Tornado Warning	FWD	Denton, Wise	42 min
Apr 9, 8:22 PM CDT	Tornado Warning	FWD	Cooke, Denton	38 min
Apr 9, 8:57 PM CDT	Tornado Warning	FWD	Cooke, Grayson	53 min
Apr 9, 9:35 PM CDT	Flash Flood Warning	FWD	Cooke, Grayson	115 min
Apr 10, 1:00 AM CDT	Severe Thunderstorm Warning	FWD	Stephens	60 min
Apr 10, 1:19 AM CDT	Severe Thunderstorm Warning	FWD	Young	56 min
Apr 10, 1:29 AM CDT	Wind Advisory	FWD	Anderson, Bell, Bosque, Collin, Comanche, Cooke and 40 more	18 hr
Apr 10, 1:39 AM CDT	Severe Thunderstorm Warning	FWD	Eastland	53 min
Apr 10, 2:00 AM CDT	Severe Thunderstorm Warning	FWD	Comanche	46 min
Apr 10, 2:10 AM CDT	River Flood Warning	FWD	Denton	32 hr
Apr 10, 2:10 AM CDT	River Flood Warning	FWD	Dallas	43 hr
Apr 10, 2:11 AM CDT	Special Weather Statement	FWD	Jack	34 min
Apr 10, 2:14 AM CDT	Severe Thunderstorm Warning	FWD	Palo Pinto	46 min
Apr 10, 2:21 AM CDT	Severe Thunderstorm Warning	FWD	Erath	39 min
Apr 10, 2:25 AM CDT	Special Weather Statement	FWD	Cooke	35 min
Apr 10, 2:28 AM CDT	Tornado Warning	FWD	Erath	25 min
Apr 10, 2:35 AM CDT	Flash Flood Warning	FWD	Cooke	4 hr
Apr 10, 2:36 AM CDT	Severe Thunderstorm Warning	FWD	Parker	39 min
Apr 10, 2:41 AM CDT	Severe Thunderstorm Warning	FWD	Hood, Somervell	39 min
Apr 10, 2:47 AM CDT	Severe Thunderstorm Warning	FWD	Bosque, Hamilton	43 min
Apr 10, 3:00 AM CDT	Tornado Warning	FWD	Somervell	15 min
Apr 10, 3:03 AM CDT	Severe Thunderstorm Warning	FWD	Johnson, Parker, Tarrant	57 min
Apr 10, 3:06 AM CDT	Severe Thunderstorm Warning	FWD	Lampasas	39 min
Apr 10, 3:10 AM CDT	Tornado Warning	FWD	Johnson	35 min
Apr 10, 3:16 AM CDT	Severe Thunderstorm Warning	FWD	Denton, Wise	44 min
Apr 10, 3:18 AM CDT	Severe Thunderstorm Warning	FWD	Hill	57 min
Apr 10, 3:26 AM CDT	Severe Thunderstorm Warning	FWD	Dallas, Ellis	64 min
Apr 10, 3:32 AM CDT	Tornado Warning	FWD	Ellis, Johnson, Tarrant	28 min
Apr 10, 3:39 AM CDT	Tornado Warning	FWD	Collin, Dallas	36 min
Apr 10, 3:42 AM CDT	Severe Thunderstorm Warning	FWD	Collin	63 min
Apr 10, 3:51 AM CDT	Special Weather Statement	FWD	Bell	24 min
Apr 10, 3:56 AM CDT	Tornado Warning	FWD	Bell, Falls, Milam	49 min
Apr 10, 3:59 AM CDT	Severe Thunderstorm Warning	FWD	Grayson	31 min
Apr 10, 4:04 AM CDT	Severe Thunderstorm Warning	FWD	Bell, Falls, Hill, Limestone, McLennan	56 min
Apr 10, 4:08 AM CDT	Severe Thunderstorm Warning	FWD	Kaufman, Rockwall	67 min
Apr 10, 4:15 AM CDT	Severe Thunderstorm Warning	FWD	Fannin, Hunt	60 min
Apr 10, 4:16 AM CDT	Tornado Warning	FWD	Bell, Falls	44 min
Apr 10, 4:48 AM CDT	Severe Thunderstorm Warning	FWD	Anderson, Freestone	72 min
Apr 10, 4:51 AM CDT	Severe Thunderstorm Warning	FWD	Delta, Hopkins, Lamar	54 min
Apr 10, 4:58 AM CDT	Severe Thunderstorm Warning	FWD	Limestone	47 min
Apr 10, 5:00 AM CDT	River Flood Warning	FWD	Wise	52 hr
Apr 10, 5:12 AM CDT	Severe Thunderstorm Warning	FWD	Rains, Van Zandt	63 min
Apr 10, 5:22 AM CDT	Tornado Warning	FWD	Anderson, Freestone	38 min
Apr 10, 5:23 AM CDT	Severe Thunderstorm Warning	FWD	Henderson	52 min
Apr 10, 5:46 AM CDT	Severe Thunderstorm Warning	FWD	Hopkins	29 min
Apr 10, 5:59 AM CDT	River Flood Warning	FWD	Dallas	91 min
Apr 10, 6:19 AM CDT	Special Weather Statement	FWD	Milam, Robertson	26 min
Apr 10, 6:24 AM CDT	Special Weather Statement	FWD	Henderson	36 min
Apr 10, 6:34 AM CDT	Severe Thunderstorm Warning	FWD	Falls, Limestone, Robertson	30 min
Apr 10, 9:53 AM CDT	River Flood Warning	FWD	Hunt	34 hr

Nearby

Severe Thunderstorm Warnings in Texas, 2008 Every severe thunderstorm warning in 2008

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.