Alert archive / Arizona / Flash Flood Warnings in 2011
Flash Flood Warning 18, NWS Tucson, AZ
NWS Tucson, AZ issued this flash flood warning at Jul 23, 2011, 4:18 PM MST for Pima County, Arizona. It was in force for 117 min. 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 23, 2011, 4:18 PM MST (23:18 UTC)
- Expired
- Jul 23, 2011, 6:15 PM MST
- In force
- 117 min
- Issued by
- NWS Tucson, AZ
- Area
- Storm-based polygon
- Flood severity
- None
County Pima County, AZ
The radar
The Tucson radar (KEMX), 33 km from the middle of the area, began a volume at 23:21 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
Tuscon, AZ (KTUS), launched 12:00Z, 11.3 hours before the alert went out and 15 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
- 907 J/kg
- Mixed-layer CIN
- -94 J/kg
- Mixed-layer LCL
- 1278 m above ground
- 0-6 km bulk shear
- 5 kt
- 0-1 km storm-relative helicity
- -7 m²/s²
- 0-3 km storm-relative helicity
- 8 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
883 WGUS55 KTWC 232318 FFWTWC AZC019-240115- /O.NEW.KTWC.FF.W.0018.110723T2318Z-110724T0115Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ BULLETIN - EAS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE TUCSON AZ 418 PM MST SAT JUL 23 2011 THE NATIONAL WEATHER SERVICE IN TUCSON HAS ISSUED A * FLASH FLOOD WARNING FOR... EAST CENTRAL PIMA COUNTY IN SOUTH CENTRAL ARIZONA... * UNTIL 615 PM MST * AT 407 PM MST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED FLASH FLOODING FROM A THUNDERSTORM BETWEEN TUCSON INTERNATIONAL AIRPORT AND SAHUARITA. AUTOMATED GAUGE REPORTS INDICATE BETWEEN 1.00 AND 1.50 INCHES OF RAINFALL IN PAST HOUR NEAR THE FRANCO WASH AND SWAN ROAD. * THE STORM PRODUCING FLASH FLOODING WILL OTHERWISE REMAIN OVER MAINLY RURAL AREAS OF THE INDICATED COUNTY. 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 3213 11101 3210 11082 3190 11082 3193 11102 $$ SHOEMAKER
3 follow-up statements
767 WGUS75 KTWC 232359 FFSTWC FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE TUCSON AZ 459 PM MST SAT JUL 23 2011 AZC019-240115- /O.CON.KTWC.FF.W.0018.000000T0000Z-110724T0115Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ PIMA AZ- 459 PM MST SAT JUL 23 2011 ...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 615 PM MST FOR EAST CENTRAL PIMA COUNTY... AT 449 PM MST...NATIONAL WEATHER SERVICE RADAR AND GAUGE REPORTS INDICATE THAT FROM 1.00 TO 1.50 INCHES OF RAIN HAS OCCURED IN LESS THAN AN HOURS TIME IN AN AREA SOUTH OF TUCSON INTERNATIONAL AIRPORT BETWEEN INTERSTATE 19 AND HOUGHTON ROAD. FLOODING OF WASHES AND LOW WATER CROSSINGS WILL OCCUR. PRECAUTIONARY/PREPAREDNESS ACTIONS... DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE ROADWAY. THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO CROSS SAFELY. MOVE TO HIGHER GROUND. IN HILLY TERRAIN THERE ARE HUNDREDS OF LOW WATER CROSSINGS WHICH ARE POTENTIALLY DANGEROUS IN HEAVY RAIN. DO NOT ATTEMPT TO TRAVEL ACROSS FLOODED ROADS. FIND ALTERNATE ROUTES. IT TAKES ONLY A FEW INCHES OF SWIFTLY FLOWING WATER TO CARRY VEHICLES AWAY. && LAT...LON 3213 11101 3210 11082 3190 11082 3193 11102 $$ SHOEMAKER
163 WGUS75 KTWC 240035 FFSTWC FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE TUCSON AZ 535 PM MST SAT JUL 23 2011 AZC019-240115- /O.CON.KTWC.FF.W.0018.000000T0000Z-110724T0115Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ PIMA AZ- 535 PM MST SAT JUL 23 2011 ...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 615 PM MST FOR EAST CENTRAL PIMA COUNTY... RAINFALL CONTINUED TO DIMINISH ACROSS THE WARNED AREA THIS EVENING. HOWEVER...EARLIER RAINFALL IN EXCESS OF 1 INCH WILL CONTINUE TO CAUSE RUNOFF PROBLEMS IN TERMS OF FLOODED WASHES AND SMALL STREAMS AS WELL AS PONDING ON ROADWAYS. THE WARNING WILL LIKELY BE ALLOWED TO EXPIRE ON TIME AT 615 PM MST. LAT...LON 3213 11101 3210 11082 3190 11082 3193 11102 $$
237 WGUS75 KTWC 240112 FFSTWC FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE TUCSON AZ 612 PM MST SAT JUL 23 2011 AZC019-240121- /O.EXP.KTWC.FF.W.0018.000000T0000Z-110724T0115Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ PIMA AZ- 612 PM MST SAT JUL 23 2011 ...THE FLASH FLOOD WARNING WILL EXPIRE AT 615 PM MST FOR EAST CENTRAL PIMA COUNTY... RADAR SHOWED A FEW SHOWERS THAT MAY PASS THROUGH THE AREA YET THIS EVENING. HOWEVER...THE HEAVY RAINFALL HAD ENDED AND THE WARNING WILL EXPIRE ON TIME AT 615 PM MST. LAT...LON 3213 11101 3210 11082 3190 11082 3193 11102 $$
The office that day
Everything else NWS Tucson, AZ issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 22, 6:42 PM MST | Severe Thunderstorm Warning | TWC | Pima | 33 min |
| Jul 23, 2:52 PM MST | Areal Flood Advisory | TWC | Pima, Santa Cruz | 3 hr |
| Jul 23, 3:45 PM MST | Severe Thunderstorm Warning | TWC | Cochise | 30 min |
| Jul 23, 3:50 PM MST | Severe Thunderstorm Warning | TWC | Pima | 40 min |
| Jul 23, 4:00 PM MST | Severe Thunderstorm Warning | TWC | Cochise | 45 min |
| Jul 23, 4:23 PM MST | Severe Thunderstorm Warning | TWC | Pima, Pinal | 37 min |
| Jul 23, 4:32 PM MST | Flash Flood Warning | TWC | Cochise | 118 min |
| Jul 23, 4:38 PM MST | Severe Thunderstorm Warning | TWC | Cochise | 37 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.