Alert archive / Arizona / Areal Flood Warnings in 2018
Areal Flood Warning 2, NWS Tucson, AZ
NWS Tucson, AZ issued this areal flood warning at Aug 13, 2018, 12:00 AM MST for Pima County, Arizona. It was in force for 15 hr. No storm report in the archive falls inside the area while it was in force.
The area
The counties it named.
The facts
- Issued
- Aug 13, 2018, 12:00 AM MST (07:00 UTC)
- Expired
- Aug 13, 2018, 2:45 PM MST
- In force
- 15 hr
- Issued by
- NWS Tucson, AZ
- Area
- Storm-based polygon
- Flood severity
- None
County Pima County, AZ
The radar
The Tucson radar (KEMX), 112 km from the middle of the area, began a volume at 07:01 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 (KDMA), launched 00:00Z, 7.0 hours before the alert went out and 84 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
- 289 J/kg
- Mixed-layer CIN
- -66 J/kg
- Mixed-layer LCL
- 2698 m above ground
- 0-6 km bulk shear
- 18 kt
- 0-1 km storm-relative helicity
- -10 m²/s²
- 0-3 km storm-relative helicity
- 16 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- -0.1
What forecasters said that day
The local office's own words before this areal flood warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Tucson, AZ wrote its last area forecast discussion before this areal flood warning went out at Aug 12, 9:46 PM MST, 2 hours 14 minutes earlier.
Area forecast discussion, Aug 12, 9:46 PM MST, 2 hours 14 minutes before
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Special weather statement, Aug 12, 6:59 PM MST, 5 hours 1 minute before
Special Weather Statement
National Weather Service Tucson AZ
659 PM MST SUN AUG 12 2018
AZZ503-504-507-513-130300-
Upper San Pedro River Valley including Sierra
Vista/Benson-Dragoon/Mule/Huachuca and Santa Rita Mountains including
Bisbee/Canelo Hills/Madera Canyon-Upper Santa Cruz River and Altar
Valleys including Nogales-Tucson Metro Area including Tucson/Green
Valley/Marana/Vail-
659 PM MST SUN AUG 12 2018
...SIGNIFICANT WEATHER ADVISORY FOR SOUTHEASTERN PIMA AND SANTA CRUZ
COUNTIES UNTIL 800 PM MST...
At 657 PM MST, Doppler radar was tracking strong thunderstorms along
a line extending from southeast of Green Valley to near the Sonoita
and Patagonia areas. Movement was southwest at 20 mph.
Winds in excess of 40 mph and blowing dust will be possible with
these storms, with heavy rain following the blowing dust.
Locations impacted include...
Nogales, Rio Rico, Tubac, Tumacacori-Carmen, Patagonia, Amado, Pena
Blanca Lake, Tumacacori, Sonoita, Lochiel, Kino Springs, Madera
Canyon, Patagonia Lake, Arivaca Junction and Elgin.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Heavy rainfall is also occurring with these storms, and may lead to
localized flooding. Do not drive your vehicle through flooded
roadways.
&&
LAT...LON 3166 11135 3186 11086 3169 11064 3144 11052
3133 11062 3133 11105
TIME...MOT...LOC 0157Z 035DEG 16KT 3180 11093 3155 11067
MeyerLocal storm report, Aug 12, 7:29 PM MST, 4 hours 31 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TUCSON AZ
729 PM MST SUN AUG 12 2018
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0655 PM DUST STORM 7 SSW AVRA VALLEY 32.35N 111.37W
08/12/2018 PIMA AZ TRAINED SPOTTER
SPOTTER REPORTED 1/2 MILE VISIBILITY IN
DUST.
&&Special weather statement, Aug 12, 7:45 PM MST, 4 hours 15 minutes before
Special Weather Statement
National Weather Service Tucson AZ
745 PM MST SUN AUG 12 2018
AZZ501>504-515-130345-
Tohono O'odham Nation including Sells-Western Pima County Including
Ajo/Organ Pipe Cactus National Monument-Upper Santa Cruz River and
Altar Valleys including Nogales-Baboquivari Mountains including Kitt
Peak-Tucson Metro Area including Tucson/Green Valley/Marana/Vail-
745 PM MST SUN AUG 12 2018
...SIGNIFICANT WEATHER ADVISORY FOR NORTHWESTERN PIMA AND
SOUTHWESTERN PINAL COUNTIES UNTIL 845 PM MST...
At 742 PM MST, Doppler radar was tracking strong thunderstorms along
a line extending from 25 miles east of Ajo to 6 miles southwest of
Santa Rosa to 9 miles northeast of Sells to near Three Points.
Movement was west and southwest at 20 mph.
Winds in excess of 40 mph and blowing dust will be possible with
these storms. The dust will be followed by areas of heavy rain.
Locations impacted include...
Sells, Ajo, Three Points, Kitt Peak, Santa Rosa, Santa Cruz, San
Luis, Kuakatch, Pisinemo, Pan Tak, Covered Wells, Big Fields,
Gunsight, Fresnal Canyon, San Isidro, Vaya Chin and Santa Rosa Ranch.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Heavy rainfall is also occurring with these storms, and may lead to
localized flooding. Do not drive your vehicle through flooded
roadways.
&&
A Severe Thunderstorm Watch remains in effect until 1100 PM MST for
areas immediately north of the advisory area.
LAT...LON 3249 11301 3251 11293 3251 11221 3265 11220
3267 11211 3228 11174 3206 11113 3176 11160
3201 11261
TIME...MOT...LOC 0242Z 065DEG 19KT 3254 11225 3224 11209 3205 11181
3199 11132
MeyerSpecial weather statement, Aug 12, 9:06 PM MST, 2 hours 54 minutes before
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</html>The office that day
Everything else NWS Tucson, AZ issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 12, 5:05 PM MST | Severe Thunderstorm Warning | TWC | Pinal | 55 min |
| Aug 12, 5:42 PM MST | Dust Storm Warning | TWC | Pima, Pinal | 93 min |
| Aug 12, 5:57 PM MST | Special Weather Statement | TWC | Santa Cruz | 48 min |
| Aug 12, 5:58 PM MST | Severe Thunderstorm Warning | TWC | Pima, Pinal | 52 min |
| Aug 12, 6:38 PM MST | Severe Thunderstorm Warning | TWC | Pima | 52 min |
| Aug 12, 6:59 PM MST | Special Weather Statement | TWC | Santa Cruz | 61 min |
| Aug 12, 7:07 PM MST | Severe Thunderstorm Warning | TWC | Pima, Pinal | 38 min |
| Aug 12, 7:09 PM MST | Areal Flood Warning | TWC | Pima | 39 min |
| Aug 12, 7:45 PM MST | Special Weather Statement | TWC | Pima | 60 min |
| Aug 12, 8:35 PM MST | Dust Storm Advisory | TWC | Pima | 55 min |
| Aug 12, 8:44 PM MST | Severe Thunderstorm Warning | TWC | Pima | 46 min |
| Aug 12, 9:06 PM MST | Special Weather Statement | TWC | 39 min |
Nearby
Areal Flood Warnings in Arizona, 2018Every areal flood warning in 2018
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.