Alert archive / Texas / Flash Flood Warnings in 2020
Flash Flood Warning 21, NWS Fort Worth, TX
NWS Fort Worth, TX issued this flash flood warning at Sep 1, 2020, 1:14 PM CDT for 4 counties in Texas. It was in force for 6 hr. 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
- Sep 1, 2020, 1:14 PM CDT (18:14 UTC)
- Expired
- Sep 1, 2020, 7:15 PM CDT
- In force
- 6 hr
- Issued by
- NWS Fort Worth, TX
- Area
- Storm-based polygon
- Flood severity
- None
Counties Collin County, TX, Cooke County, TX, Denton County, TX, Grayson County, TX
The radar
The Dallas/Ft Worth radar (KFWS), 104 km from the middle of the area, began a volume at 18:14 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 |
|---|---|---|---|
| Sep 1, 3:00 PM CDT | FLASH FLOOD | 1 Wsw Denton, TX | PHOTOS OF AT LEAST 1 FOOT OF WATER COVERING STREETS NEAR UNT IN SOUTHWEST DENTON. VEHICLES BECOMING STUCK ON FLOODED ROADS. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Fort Worth, TX (KFWD), launched 12:00Z, 6.2 hours before the alert went out and 77 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
- 1346 J/kg
- Mixed-layer CIN
- -56 J/kg
- Mixed-layer LCL
- 919 m above ground
- 0-6 km bulk shear
- 26 kt
- 0-1 km storm-relative helicity
- 170 m²/s²
- 0-3 km storm-relative helicity
- 159 m²/s²
- Significant tornado parameter
- 0.8
- Supercell composite
- 7.9
The text
As transmitted.
159
WGUS54 KFWD 011814
FFWFWD
TXC085-097-121-181-012115-
/O.NEW.KFWD.FF.W.0021.200901T1814Z-200901T2115Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Fort Worth TX
114 PM CDT Tue Sep 1 2020
The National Weather Service in Fort Worth has issued a
* Flash Flood Warning for...
Northwestern Collin County in north central Texas...
Southeastern Cooke County in north central Texas...
Northern Denton County in north central Texas...
Southwestern Grayson County in north central Texas...
* Until 415 PM CDT.
* At 114 PM CDT, emergency management reported flooding due to
thunderstorms in Southwest Grayson County. Additional heavy rain
moving into areas that received between 2 and 4 inches of rain
earlier today will receive another 1 to 3 inches of rain shortly.
Flash flooding is ongoing or expected to begin shortly.
HAZARD...Flash flooding caused by thunderstorms.
SOURCE...Emergency management and doppler radar.
IMPACT...Flooding of small creeks and streams, urban areas,
highways, streets, and underpasses as well as other
poor drainage and low lying areas.
* Some locations that will experience flash flooding include...
Denton, Sherman, Sanger, Whitesboro, Celina, Krum, Pilot Point,
Van Alstyne, Howe, Aubrey, Northlake, Krugerville, Collinsville,
Cross Roads, Gunter, Dorchester, Ray Roberts Park Isle Du Bois,
Ray Roberts Park Johnson Branch, Lake Kiowa and Oak Point.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
Stay away or be swept away. River banks and culverts can become
unstable and unsafe.
&&
LAT...LON 3367 9694 3367 9658 3340 9659 3340 9660
3325 9684 3308 9739 3342 9738
FLASH FLOOD...OBSERVED
$$
Bonnette2 follow-up statements
308
WGUS54 KFWD 012056
FFWFWD
TXC085-097-121-181-020015-
/O.EXT.KFWD.FF.W.0021.000000T0000Z-200902T0015Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Fort Worth TX
356 PM CDT Tue Sep 1 2020
The National Weather Service in Fort Worth has extended the
* Flash Flood Warning for...
Northwestern Collin County in north central Texas...
Southeastern Cooke County in north central Texas...
Northern Denton County in north central Texas...
Southwestern Grayson County in north central Texas...
* Until 715 PM CDT.
* At 356 PM CDT, emergency management in Grayson County reported
flooding due to thunderstorms producing heavy rain. Also, numerous
reports of flooded streets in the Denton area have been received.
Between 2 and 4 inches of rain have fallen with some isolated
amounts as high as 5 inches near Krum and Sanger.
HAZARD...Flash flooding caused by thunderstorms.
SOURCE...Emergency management.
IMPACT...Flooding of small creeks and streams, urban areas,
highways, streets, and underpasses as well as other
poor drainage and low lying areas.
* Some locations that will experience flash flooding include...
Denton, Sherman, Sanger, Whitesboro, Celina, Krum, Pilot Point,
Van Alstyne, Howe, Aubrey, Northlake, Krugerville, Collinsville,
Cross Roads, Gunter, Dorchester, Ray Roberts Park Isle Du Bois,
Ray Roberts Park Johnson Branch, Lake Kiowa and Oak Point.
Additional rainfall amounts of up to 2 inches are possible in the
warned area through 7 PM.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
Excessive runoff from heavy rainfall will cause flooding of small
creeks and streams, urban areas, highways, streets, and underpasses
as well as other drainage areas and low lying spots.
Stay away or be swept away. River banks and culverts can become
unstable and unsafe.
&&
LAT...LON 3367 9694 3367 9658 3340 9659 3340 9660
3325 9684 3308 9739 3342 9738
FLASH FLOOD...OBSERVED
$$
Stalley064
WGUS74 KFWD 020017
FFSFWD
Flash Flood Statement
National Weather Service Fort Worth TX
717 PM CDT Tue Sep 1 2020
TXC085-097-181-020027-
/O.EXP.KFWD.FF.W.0021.000000T0000Z-200902T0015Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Collin TX-Cooke TX-Grayson TX-
717 PM CDT Tue Sep 1 2020
...FLASH FLOOD WARNING HAS EXPIRED FOR NORTHWESTERN COLLIN,
SOUTHEASTERN COOKE, NORTHERN DENTON AND SOUTHWESTERN GRAYSON
COUNTIES...
The heaviest rain has ended, but nuisance flooding of low lying
and/or poor drainage areas may continue for a few hours until the
water has had a chance to recede. Please continue to avoid flooded
areas and heed all road closures.
A Flash Flood Watch remains in effect until 700 AM CDT Thursday for
the area.
LAT...LON 3367 9694 3367 9658 3340 9659 3340 9660
3325 9684 3308 9739 3342 9738
$$
StalleyThe office that day
Everything else NWS Fort Worth, TX issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 31, 7:06 PM CDT | Flash Flood Watch | FWD | Bell, Bosque, Collin, Comanche, Cooke, Coryell and 37 more | 60 hr |
| Sep 1, 9:02 AM CDT | Areal Flood Advisory | FWD | Cooke, Fannin, Grayson, Montague | 3 hr |
| Sep 1, 11:23 AM CDT | Areal Flood Advisory | FWD | Collin, Denton, Wise | 6 hr |
| Sep 1, 12:04 PM CDT | Areal Flood Advisory | FWD | Cooke, Grayson | 3 hr |
| Sep 1, 2:22 PM CDT | Special Weather Statement | FWD | Parker | 38 min |
| Sep 1, 2:36 PM CDT | Special Weather Statement | FWD | Eastland | 39 min |
| Sep 1, 2:50 PM CDT | Special Weather Statement | FWD | Young | 40 min |
| Sep 1, 2:58 PM CDT | Severe Thunderstorm Warning | FWD | Jack | 62 min |
| Sep 1, 3:03 PM CDT | Tornado Warning | FWD | Jack | 25 min |
| Sep 1, 3:15 PM CDT | Severe Thunderstorm Warning | FWD | Jack, Palo Pinto, Young | 60 min |
| Sep 1, 3:33 PM CDT | Severe Thunderstorm Warning | FWD | Stephens, Young | 57 min |
| Sep 1, 3:54 PM CDT | Severe Thunderstorm Warning | FWD | Stephens | 36 min |
| Sep 1, 4:32 PM CDT | Areal Flood Advisory | FWD | Jack, Palo Pinto, Parker | 3 hr |
| Sep 1, 4:49 PM CDT | Flash Flood Warning | FWD | Denton | 2 hr |
| Sep 1, 4:54 PM CDT | River Flood Warning | FWD | Denton | 43 hr |
| Sep 1, 5:23 PM CDT | Areal Flood Advisory | FWD | Wise | 3 hr |
| Sep 1, 5:40 PM CDT | Special Weather Statement | FWD | Somervell | 50 min |
| Sep 1, 6:05 PM CDT | Areal Flood Advisory | FWD | Tarrant | 3 hr |
| Sep 1, 6:19 PM CDT | Special Weather Statement | FWD | Johnson | 56 min |
| Sep 1, 6:25 PM CDT | Special Weather Statement | FWD | Dallas | 65 min |
Nearby
Flash Flood Warnings in Texas, 2020Every flash flood warning in 2020
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.