Alert archive / Arizona / Flash Flood Warnings in 2011
Flash Flood Warning 47, NWS Tucson, AZ
NWS Tucson, AZ issued this flash flood warning at Aug 17, 2011, 5:15 PM MST for Cochise County, Arizona. It was in force for 90 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
- Aug 17, 2011, 5:15 PM MST (00:15 UTC)
- Expired
- Aug 17, 2011, 6:45 PM MST
- In force
- 90 min
- Issued by
- NWS Tucson, AZ
- Area
- Storm-based polygon
- Flood severity
- None
County Cochise County, AZ
The radar
The Tucson radar (KEMX), 32 km from the middle of the area, began a volume at 00:17 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 |
|---|---|---|---|
| Aug 17, 5:25 PM MST | FLASH FLOOD | Benson, AZ | SPOTTER REPORTED THAT A 6 TO 7 FOOT DEEP WASH WAS FULL AND BEGINNING TO FLOW OVER THE ROAD IN FRONT OF HIS RESIDENCE. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Tuscon, AZ (KTUS), launched 00:00Z, 0.3 hours before the alert went out and 57 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
- 251 J/kg
- Mixed-layer CIN
- -23 J/kg
- Mixed-layer LCL
- 2476 m above ground
- 0-6 km bulk shear
- 19 kt
- 0-1 km storm-relative helicity
- 8 m²/s²
- 0-3 km storm-relative helicity
- 30 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
968 WGUS55 KTWC 180015 FFWTWC AZC003-180145- /O.NEW.KTWC.FF.W.0047.110818T0015Z-110818T0145Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ BULLETIN - EAS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE TUCSON AZ 515 PM MST WED AUG 17 2011 THE NATIONAL WEATHER SERVICE IN TUCSON HAS ISSUED A * FLASH FLOOD WARNING FOR... WEST CENTRAL COCHISE COUNTY IN SOUTHEAST ARIZONA... * UNTIL 645 PM MST * AT 507 PM MST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A THUNDERSTORM PRODUCING VERY HEAVY RAINFALL OVER WEST CENTRAL COCHISE COUNTY...OVER THE CITY OF BENSON. THIS STORM HAS SHOWN VERY LITTLE MOVEMENT. * LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO BENSON PRECAUTIONARY/PREPAREDNESS ACTIONS... EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF WASHES AND STREAMS...URBAN AREAS...HIGHWAYS...STREETS AND UNDERPASSES AS WELL AS OTHER DRAINAGE AREAS AND LOW LYING SPOTS. DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE ROADWAY. THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO CROSS SAFELY. && LAT...LON 3209 11043 3213 11018 3190 11013 3184 11044 $$ ZELL
2 follow-up statements
153 WGUS75 KTWC 180049 FFSTWC FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE TUCSON AZ 549 PM MST WED AUG 17 2011 AZC003-180145- /O.CON.KTWC.FF.W.0047.000000T0000Z-110818T0145Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ COCHISE AZ- 549 PM MST WED AUG 17 2011 ...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 645 PM MST FOR WEST CENTRAL COCHISE COUNTY... AT 545 PM MST...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO INDICATE A THUNDERSTORM PRODUCING VERY HEAVY RAINFALL IN WEST CENTRAL COCHISE COUNTY...FROM THE BENSON AREA...WEST ALONG INTERSTATE 10...TO THE PIMA COUNTY LINE. RADAR RAINFALL ESTIMATES INDICATE THAT BETWEEN ONE AND TWO INCHES OF RAINFALL HAS FALLEN IN THIS AREA. LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO MESCAL. PRECAUTIONARY/PREPAREDNESS ACTIONS... DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE ROADWAY. THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO CROSS SAFELY. MOVE TO HIGHER GROUND. FLOODING IS OCCURRING OR IS IMMINENT. MOST FLOOD RELATED DEATHS OCCUR IN AUTOMOBILES. DO NOT ATTEMPT TO CROSS WATER COVERED BRIDGES... DIPS...OR LOW WATER CROSSINGS. NEVER TRY TO CROSS A FLOWING STREAM... EVEN A SMALL ONE...ON FOOT. TO ESCAPE RISING WATER MOVE UP TO HIGHER GROUND. && LAT...LON 3209 11043 3213 11018 3190 11013 3184 11044 $$ ZELL
688 WGUS75 KTWC 180144 FFSTWC FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE TUCSON AZ 644 PM MST WED AUG 17 2011 AZC003-180153- /O.EXP.KTWC.FF.W.0047.000000T0000Z-110818T0145Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ COCHISE AZ- 644 PM MST WED AUG 17 2011 ...THE FLASH FLOOD WARNING WILL EXPIRE AT 645 PM MST FOR WEST CENTRAL COCHISE COUNTY... AT 642 PM MST...NATIONAL WEATHER SERVICE RADAR INDICATED THAT ONLY LIGHT SHOWERS REMAINED OVER THE WARNING AREA IN THE WEST CENTRAL COCHISE COUNTY. THEREFORE...THE FLASH FLOOD WARNING HAS BEEN ALLOWED TO EXPIRE. LAT...LON 3209 11043 3213 11018 3190 11013 3184 11044 $$ ZELL
The office that day
Everything else NWS Tucson, AZ issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 17, 5:28 PM MST | Severe Thunderstorm Warning | TWC | Cochise | 32 min |
| Aug 18, 11:27 AM MST | Areal Flood Advisory | TWC | Cochise | 78 min |
| Aug 18, 12:34 PM MST | Special Weather Statement | TWC | Graham | 41 min |
| Aug 18, 12:44 PM MST | Special Weather Statement | TWC | Pinal | 46 min |
| Aug 18, 1:03 PM MST | Severe Thunderstorm Warning | TWC | Pinal | 42 min |
| Aug 18, 1:31 PM MST | Severe Thunderstorm Warning | TWC | Cochise, Pima | 44 min |
| Aug 18, 1:34 PM MST | Severe Thunderstorm Warning | TWC | Santa Cruz | 26 min |
| Aug 18, 2:03 PM MST | Severe Thunderstorm Warning | TWC | Santa Cruz | 27 min |
| Aug 18, 2:14 PM MST | Severe Thunderstorm Warning | TWC | Cochise | 46 min |
| Aug 18, 2:15 PM MST | Severe Thunderstorm Warning | TWC | Cochise, Graham | 45 min |
| Aug 18, 2:21 PM MST | Severe Thunderstorm Warning | TWC | Pima | 39 min |
| Aug 18, 3:18 PM MST | Areal Flood Advisory | TWC | Pinal | 3 hr |
| Aug 18, 3:19 PM MST | Areal Flood Advisory | TWC | Pima, Santa Cruz | 116 min |
| Aug 18, 3:29 PM MST | Areal Flood Advisory | TWC | Pima | 2 hr |
| Aug 18, 3:59 PM MST | Severe Thunderstorm Warning | TWC | Pima | 46 min |
| Aug 18, 4:20 PM MST | Flash Flood Warning | TWC | Pima | 85 min |
| Aug 18, 4:39 PM MST | Flash Flood Warning | TWC | Cochise | 81 min |
Nearby
Flash Flood Warnings in Arizona, 2011Every flash flood warning in 2011
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.