Alert archive / Arizona / Flash Flood Warnings in 2021
Flash Flood Warning 46, NWS Tucson, AZ
NWS Tucson, AZ issued this flash flood warning at Jul 18, 2021, 5:37 PM MST for Cochise County, Graham County, Greenlee County, Arizona. It was in force for 3 hr. No storm report in the archive falls inside the area while it was in force.
The area
The outline as issued.
The facts
- Issued
- Jul 18, 2021, 5:37 PM MST (00:37 UTC)
- Expired
- Jul 18, 2021, 8:45 PM MST
- In force
- 3 hr
- Issued by
- NWS Tucson, AZ
- Area
- Storm-based polygon
- Damage threat
- Considerable
- Flood severity
- None
Counties Cochise County, AZ, Graham County, AZ, Greenlee County, AZ
The radar
The Tucson radar (KEMX), 153 km from the middle of the area, began a volume at 00:41 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 nearest sounding before it
Santa Teresa, NM (KEPZ), launched 00:00Z, 0.6 hours before the alert went out and 238 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
- 66 J/kg
- Mixed-layer CIN
- -169 J/kg
- Mixed-layer LCL
- 1705 m above ground
- 0-6 km bulk shear
- 22 kt
- 0-1 km storm-relative helicity
- 30 m²/s²
- 0-3 km storm-relative helicity
- 85 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
139
WGUS55 KTWC 190037
FFWTWC
AZC003-009-011-190345-
/O.NEW.KTWC.FF.W.0046.210719T0037Z-210719T0345Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Tucson AZ
537 PM MST Sun Jul 18 2021
The National Weather Service in Tucson has issued a
* Flash Flood Warning for...
Northeastern Cochise County in southeastern Arizona...
Southeastern Graham County in southeastern Arizona...
Southeastern Greenlee County in southeastern Arizona...
* Until 845 PM MST.
* At 537 PM MST, Doppler radar indicated thunderstorms producing
heavy rain across the warned area. Between 1 and 2.5 inches of
rain have fallen. Additional rainfall amounts up to 1 inch are
possible in the warned area. Flash flooding is ongoing or expected
to begin shortly.
HAZARD...Life threatening flash flooding. Thunderstorms
producing flash flooding.
SOURCE...Radar.
IMPACT...Life threatening flash flooding of creeks and streams,
urban areas, highways, streets and underpasses.
* Some locations that will experience flash flooding include...
mainly rural areas of Northeastern Cochise, Southeastern Graham
and Southeastern Greenlee Counties
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
Be aware of your surroundings and do not drive on flooded roads.
Please report observed flooding to local emergency services or law
enforcement and request they pass this information to the National
Weather Service when you can do so safely.
&&
LAT...LON 3247 10930 3254 10910 3254 10905 3249 10905
3243 10905 3234 10905 3232 10913 3234 10924
FLASH FLOOD...RADAR INDICATED
FLASH FLOOD DAMAGE THREAT...CONSIDERABLE
$$
AH2 follow-up statements
422
WGUS75 KTWC 190226
FFSTWC
Flash Flood Statement
National Weather Service Tucson AZ
726 PM MST Sun Jul 18 2021
AZC003-009-011-190345-
/O.CON.KTWC.FF.W.0046.000000T0000Z-210719T0345Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Cochise AZ-Graham AZ-Greenlee AZ-
726 PM MST Sun Jul 18 2021
...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 845 PM MST THIS
EVENING FOR NORTHEASTERN COCHISE, SOUTHEASTERN GRAHAM AND
SOUTHEASTERN GREENLEE COUNTIES...
At 726 PM MST, Doppler radar indicated thunderstorms producing heavy
rain across the warned area. Between 1 and 2.5 inches of rain have
fallen. Flash flooding is ongoing or expected to begin shortly.
HAZARD...Life threatening flash flooding. Thunderstorms producing
flash flooding.
SOURCE...Radar.
IMPACT...Life threatening flash flooding of creeks and streams,
urban areas, highways, streets and underpasses.
Some locations that will experience flash flooding include...
mainly rural areas of Northeastern Cochise, Southeastern Graham
and Southeastern Greenlee Counties
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
Be aware of your surroundings and do not drive on flooded roads.
Please report observed flooding to local emergency services or law
enforcement and request they pass this information to the National
Weather Service when you can do so safely.
&&
LAT...LON 3247 10930 3254 10910 3254 10905 3249 10905
3243 10905 3234 10905 3232 10913 3234 10924
FLASH FLOOD...RADAR INDICATED
FLASH FLOOD DAMAGE THREAT...CONSIDERABLE
$$
AH444
WGUS75 KTWC 190338
FFSTWC
Flash Flood Statement
National Weather Service Tucson AZ
838 PM MST Sun Jul 18 2021
AZC003-009-011-190348-
/O.EXP.KTWC.FF.W.0046.000000T0000Z-210719T0345Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Cochise AZ-Graham AZ-Greenlee AZ-
838 PM MST Sun Jul 18 2021
...FLASH FLOOD WARNING WILL EXPIRE AT 845 PM MST THIS EVENING FOR
NORTHEASTERN COCHISE, SOUTHEASTERN GRAHAM AND SOUTHEASTERN GREENLEE
COUNTIES...
The heavy rain has ended. Flooding is no longer expected to pose a
threat. Please continue to heed remaining road closures.
A Flash Flood Watch remains in effect until 1200 AM MST for a
portion of Southeast Arizona.
LAT...LON 3247 10930 3254 10910 3254 10905 3249 10905
3243 10905 3234 10905 3232 10913 3234 10924
$$
KRGThe office that day
Everything else NWS Tucson, AZ issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 18, 5:06 PM MST | Special Weather Statement | TWC | 39 min | |
| Jul 18, 5:10 PM MST | Special Weather Statement | TWC | Cochise | 35 min |
| Jul 18, 5:27 PM MST | Severe Thunderstorm Warning | TWC | Cochise, Graham | 48 min |
| Jul 18, 5:30 PM MST | Flash Flood Warning | TWC | Cochise | 3 hr |
| Jul 18, 5:42 PM MST | Areal Flood Advisory | TWC | Cochise, Santa Cruz | 3 hr |
| Jul 18, 5:46 PM MST | Special Weather Statement | TWC | 44 min | |
| Jul 18, 6:01 PM MST | Special Weather Statement | TWC | Cochise | 59 min |
| Jul 18, 6:02 PM MST | Severe Thunderstorm Warning | TWC | Cochise, Santa Cruz | 43 min |
| Jul 18, 6:06 PM MST | Flash Flood Warning | TWC | Cochise | 2 hr |
| Jul 18, 6:11 PM MST | Areal Flood Advisory | TWC | Santa Cruz | 3 hr |
| Jul 18, 6:12 PM MST | Severe Thunderstorm Warning | TWC | Cochise, Graham | 48 min |
| Jul 18, 6:24 PM MST | Severe Thunderstorm Warning | TWC | Cochise, Pima | 36 min |
| Jul 18, 6:33 PM MST | Flash Flood Warning | TWC | Cochise, Graham | 3 hr |
| Jul 18, 6:39 PM MST | Special Weather Statement | TWC | 66 min | |
| Jul 18, 6:43 PM MST | Areal Flood Advisory | TWC | Cochise, Graham, Pima | 3 hr |
| Jul 18, 7:00 PM MST | Flash Flood Warning | TWC | Cochise, Pima | 3 hr |
| Jul 18, 7:07 PM MST | Severe Thunderstorm Warning | TWC | Cochise, Pima | 38 min |
| Jul 18, 7:23 PM MST | Areal Flood Advisory | TWC | Cochise, Pima, Santa Cruz | 3 hr |
| Jul 18, 7:29 PM MST | Severe Thunderstorm Warning | TWC | Pima | 61 min |
| Jul 18, 7:36 PM MST | Special Weather Statement | TWC | Cochise | 39 min |
| Jul 18, 7:45 PM MST | Areal Flood Advisory | TWC | Cochise | 3 hr |
| Jul 18, 7:51 PM MST | Special Weather Statement | TWC | 39 min | |
| Jul 18, 8:20 PM MST | Flash Flood Warning | TWC | Pima | 3 hr |
| Jul 18, 9:30 PM MST | Flash Flood Warning | TWC | Pima | 3 hr |
| Jul 19, 3:23 PM MST | Special Weather Statement | TWC | Greenlee | 22 min |
| Jul 19, 4:03 PM MST | Areal Flood Advisory | TWC | Greenlee | 3 hr |
| Jul 19, 4:06 PM MST | Severe Thunderstorm Warning | TWC | Graham, Greenlee | 39 min |
Nearby
Flash Flood Warnings in Arizona, 2021Every flash flood warning in 2021
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.