Alert archive / Texas / Tornado Warnings in 2009
Tornado Warning 21, NWS Houston/Galveston, TX
NWS Houston/Galveston, TX issued this tornado warning at Apr 27, 2009, 4:55 PM CDT for 4 counties in Texas. It was in force for 35 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
- Apr 27, 2009, 4:55 PM CDT (21:55 UTC)
- Expired
- Apr 27, 2009, 5:30 PM CDT
- In force
- 35 min
- Issued by
- NWS Houston/Galveston, TX
- Area
- Storm-based polygon
Counties Austin County, TX, Fort Bend County, TX, Waller County, TX, Wharton County, TX
The radar
The Houston radar (KHGX), 99 km from the middle of the area, began a volume at 21:55 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 |
|---|---|---|---|
| Apr 27, 5:15 PM CDT | FUNNEL CLOUD | 3 Se Orchard, TX | FUNNEL DURATION 1 TO 2 MINUTES |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
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 27, 3:58 PM CDT | Tornado Watch | SPC | 5 hr |
The nearest sounding before it
Corpus Christi, TX (KCRP), launched 12:00Z, 9.9 hours before the alert went out and 247 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
- 1236 J/kg
- Mixed-layer CIN
- -230 J/kg
- Mixed-layer LCL
- 508 m above ground
- 0-6 km bulk shear
- 35 kt
- 0-1 km storm-relative helicity
- 119 m²/s²
- 0-3 km storm-relative helicity
- 258 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.6
The text
As transmitted, in the capitals the NWS used until 2016.
000
WFUS54 KHGX 272155
TORHGX
TXC015-157-473-481-272230-
/O.NEW.KHGX.TO.W.0021.090427T2155Z-090427T2230Z/
BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX
455 PM CDT MON APR 27 2009
THE NATIONAL WEATHER SERVICE IN LEAGUE CITY HAS ISSUED A
* TORNADO WARNING FOR...
SOUTHEASTERN AUSTIN COUNTY IN SOUTHEAST TEXAS...
NORTHWESTERN FORT BEND COUNTY IN SOUTHEAST TEXAS...
SOUTHERN WALLER COUNTY IN SOUTHEAST TEXAS...
NORTHERN WHARTON COUNTY IN SOUTHEAST TEXAS...
* UNTIL 530 PM CDT
* AT 452 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO THIS TORNADO
WAS LOCATED NEAR EAST BERNARD... MOVING NORTHEAST AT 20 MPH.
* LOCATIONS IN THE TORNADO WARNING INCLUDE BUT ARE NOT LIMITED TO
WADSWORTH...WALLIS...SIMONTON...SAN FELIPE...ROSENBERG...
RICHMOND...PECAN GROVE...PATTISON...ORCHARD...FULSHEAR...BROOKSHIRE
AND BEASLEY.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
WHEN A TORNADO WARNING IS ISSUED BASED ON DOPPLER RADAR...IT MEANS
THAT STRONG ROTATION HAS BEEN DETECTED IN THE STORM. A TORNADO MAY
ALREADY BE ON THE GROUND...OR IS EXPECTED TO DEVELOP SHORTLY.
A TORNADO WATCH IS IN EFFECT UNTIL 9 PM CDT FOR THE WARNED AREA.
&&
PLEASE REPORT SEVERE WEATHER TO THE COUNTY SHERIFF...LOCAL POLICE...
OR DEPARTMENT OF PUBLIC SAFETY AND ASK THEM TO RELAY YOUR REPORT TO
THE NATIONAL WEATHER SERVICE.
LAT...LON 2963 9619 2965 9621 2992 9604 2992 9596
2960 9566 2941 9614 2954 9627
TIME...MOT...LOC 2155Z 229DEG 17KT 2954 9612
$$3 follow-up statements
000
WWUS54 KHGX 272206
SVSHGX
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX
506 PM CDT MON APR 27 2009
TXC015-157-473-481-272230-
/O.CON.KHGX.TO.W.0021.000000T0000Z-090427T2230Z/
WALLER TX-AUSTIN TX-FORT BEND TX-WHARTON TX-
506 PM CDT MON APR 27 2009
...A TORNADO WARNING REMAINS IN EFFECT UNTIL 530 PM CDT FOR
WHARTON...FORT BEND...AUSTIN AND WALLER COUNTIES...
AT 503 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
TORNADO. THIS TORNADO WAS LOCATED NEAR EAST BERNARD...OR 14 MILES
EAST OF EAGLE LAKE...AND MOVING NORTHEAST AT 20 MPH.
IN ADDITION TO THE STORM THAT INITIALLY PROMPTED THE
WARNING...ANOTHER STORM WITHIN THE WARNED AREA HAS BEGUN TO ROTATE
NEAR ORCHARD. THIS STORM IS ALSO MOVING NORTHEAST AND IS HEADING
TOWARDS FULSHEAR.
* LOCATIONS IN THE THE TORNADO WARNING INCLUDE BUT ARE NOT LIMITED TO
WADSWORTH...WALLIS...SIMONTON...SAN FELIPE...ROSENBERG...
RICHMOND...PECAN GROVE...PATTISON...ORCHARD...FULSHEAR AND
BROOKSHIRE
PRECAUTIONARY/PREPAREDNESS ACTIONS...
WHEN A TORNADO WARNING IS ISSUED BASED ON DOPPLER RADAR...IT MEANS
THAT STRONG ROTATION HAS BEEN DETECTED IN THE STORM. A TORNADO MAY
ALREADY BE ON THE GROUND...OR IS EXPECTED TO DEVELOP SHORTLY.
&&
PLEASE REPORT SEVERE WEATHER TO THE COUNTY SHERIFF...LOCAL POLICE...
OR DEPARTMENT OF PUBLIC SAFETY AND ASK THEM TO RELAY YOUR REPORT TO
THE NATIONAL WEATHER SERVICE.
LAT...LON 2963 9618 2966 9621 2992 9604 2992 9596
2960 9566 2944 9605 2958 9624
TIME...MOT...LOC 2203Z 229DEG 17KT 2956 9609
$$000
WWUS54 KHGX 272223
SVSHGX
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX
523 PM CDT MON APR 27 2009
TXC015-157-473-272230-
/O.CON.KHGX.TO.W.0021.000000T0000Z-090427T2230Z/
WALLER TX-AUSTIN TX-FORT BEND TX-
523 PM CDT MON APR 27 2009
...A TORNADO WARNING REMAINS IN EFFECT UNTIL 530 PM CDT FOR FORT
BEND...AUSTIN AND WALLER COUNTIES...
AT 521 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
TORNADO. THIS TORNADO WAS LOCATED NEAR WALLIS...OR 12 MILES SOUTH
OF BROOKSHIRE...AND MOVING NORTHEAST AT 20 MPH.
SEVERAL AREAS OF ROTATION ARE PRESENT WITHIN THE WARNED AREA. AT
THIS TIME THE AREA OF GREATEST CONCERN IS BETWEEN ORCHARD AND
FULSHEAR.
* LOCATIONS IN THE THE TORNADO WARNING INCLUDE BUT ARE NOT LIMITED TO
WADSWORTH...SIMONTON...SAN FELIPE...ROSENBERG...RICHMOND...PECAN
GROVE...PATTISON...ORCHARD AND FULSHEAR
PRECAUTIONARY/PREPAREDNESS ACTIONS...
WHEN A TORNADO WARNING IS ISSUED BASED ON DOPPLER RADAR...IT MEANS
THAT STRONG ROTATION HAS BEEN DETECTED IN THE STORM. A TORNADO MAY
ALREADY BE ON THE GROUND...OR IS EXPECTED TO DEVELOP SHORTLY.
&&
PLEASE REPORT SEVERE WEATHER TO THE COUNTY SHERIFF...LOCAL POLICE...
OR DEPARTMENT OF PUBLIC SAFETY AND ASK THEM TO RELAY YOUR REPORT TO
THE NATIONAL WEATHER SERVICE.
LAT...LON 2991 9605 2992 9603 2992 9596 2960 9566
2947 9599 2954 9606 2959 9607 2962 9610
2962 9614 2966 9619 2964 9619 2965 9620
2967 9621
TIME...MOT...LOC 2222Z 229DEG 17KT 2962 9601
$$000
WWUS54 KHGX 272233
SVSHGX
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX
533 PM CDT MON APR 27 2009
TXC015-157-473-272243-
/O.EXP.KHGX.TO.W.0021.000000T0000Z-090427T2230Z/
WALLER TX-AUSTIN TX-FORT BEND TX-
533 PM CDT MON APR 27 2009
...THE TORNADO WARNING FOR FORT BEND...AUSTIN AND WALLER COUNTIES HAS
BEEN ALLOWED TO EXPIRE...
A TORNADO WATCH IS IN EFFECT UNTIL 9 PM CDT FOR THE WARNED AREA.
PLEASE REPORT SEVERE WEATHER TO THE COUNTY SHERIFF...LOCAL POLICE...
OR DEPARTMENT OF PUBLIC SAFETY AND ASK THEM TO RELAY YOUR REPORT TO
THE NATIONAL WEATHER SERVICE.
LAT...LON 2991 9605 2992 9603 2992 9596 2960 9566
2947 9599 2954 9606 2959 9607 2962 9610
2962 9614 2966 9619 2964 9619 2965 9620
2967 9621
TIME...MOT...LOC 2223Z 229DEG 17KT 2962 9601
$$The office that day
Everything else NWS Houston/Galveston, TX issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 27, 1:26 PM CDT | Severe Thunderstorm Warning | HGX | Houston | 44 min |
| Apr 27, 3:47 PM CDT | Flood Watch | HGX | Austin, Brazoria, Brazos, Burleson, Chambers, Colorado and 17 more | 5 hr |
| Apr 27, 3:55 PM CDT | Tornado Warning | HGX | Austin, Washington | 35 min |
| Apr 27, 5:07 PM CDT | Tornado Warning | HGX | Harris, Montgomery | 38 min |
| Apr 27, 5:21 PM CDT | Flash Flood Warning | HGX | Austin, Colorado, Fort Bend, Harris, Montgomery, Waller and 1 more | 3 hr |
| Apr 27, 5:34 PM CDT | Tornado Warning | HGX | Harris, Montgomery | 41 min |
| Apr 27, 5:46 PM CDT | Tornado Warning | HGX | Harris, Montgomery | 44 min |
| Apr 27, 5:52 PM CDT | Severe Thunderstorm Warning | HGX | Brazoria, Fort Bend, Harris | 38 min |
| Apr 27, 5:56 PM CDT | Special Marine Warning | HGX | 94 min | |
| Apr 27, 6:02 PM CDT | Tornado Warning | HGX | Brazoria, Fort Bend, Harris | 28 min |
| Apr 27, 6:27 PM CDT | Severe Thunderstorm Warning | HGX | Brazoria, Chambers, Fort Bend, Galveston, Harris, Liberty and 1 more | 63 min |
| Apr 27, 6:31 PM CDT | Special Marine Warning | HGX | 89 min |
Nearby
Tornado Warnings in Texas, 2009Every tornado warning in 2009Tornadoes in 2009
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.