Alert archive / Arizona / Special Weather Statements in 2018
Special Weather Statement, NWS Tucson, AZ
NWS Tucson, AZ issued this special weather statement at Aug 1, 2018, 9:21 PM MST for Pima County, Arizona. It was in force for 54 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
- Aug 1, 2018, 9:21 PM MST (04:21 UTC)
- Expired
- Aug 1, 2018, 10:15 PM MST
- In force
- 54 min
- Issued by
- NWS Tucson, AZ
County Pima County, AZ
The radar
The Tucson radar (KEMX), 98 km from the middle of the area, began a volume at 04:23 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, 4.4 hours before the alert went out and 61 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 0 m above ground
- 0-6 km bulk shear
- 5 kt
- 0-1 km storm-relative helicity
- 9 m²/s²
- 0-3 km storm-relative helicity
- -2 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
258 WWUS85 KTWC 020421 SPSTWC Special Weather Statement National Weather Service Tucson AZ 921 PM MST WED AUG 1 2018 AZZ502-504-020515- Tohono O'odham Nation including Sells-Tucson Metro Area including Tucson/Green Valley/Marana/Vail- 921 PM MST WED AUG 1 2018 ...SIGNIFICANT WEATHER ADVISORY FOR NORTH CENTRAL PIMA COUNTY UNTIL 1015 PM MST... At 919 PM MST, Doppler radar was tracking an area of strong thunderstorms from Avra Valley to the Silver Bell area, moving west at 10 to 15 mph. Wind gusts to 45 mph will be possible with these storms, along with heavy rainfall. Locations impacted include... Avra Valley, Silver Bell, Queens Well and Picture Rocks. PRECAUTIONARY/PREPAREDNESS ACTIONS... Heavy rainfall is also occurring with this storm, and may lead to localized flooding. Do not drive your vehicle through flooded roadways. && LAT...LON 3250 11127 3221 11128 3219 11176 3250 11192 TIME...MOT...LOC 0419Z 095DEG 14KT 3240 11157 $$ Meyer
The office that day
Everything else NWS Tucson, AZ issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 1, 5:00 PM MST | Special Weather Statement | TWC | Graham | 30 min |
| Aug 1, 5:41 PM MST | Special Weather Statement | TWC | Santa Cruz | 34 min |
| Aug 1, 5:59 PM MST | Special Weather Statement | TWC | 46 min | |
| Aug 1, 6:30 PM MST | Special Weather Statement | TWC | Santa Cruz | 30 min |
| Aug 1, 7:19 PM MST | Special Weather Statement | TWC | 41 min | |
| Aug 1, 7:27 PM MST | Severe Thunderstorm Warning | TWC | Pima | 48 min |
| Aug 1, 7:59 PM MST | Severe Thunderstorm Warning | TWC | Pima, Pinal | 46 min |
| Aug 1, 8:14 PM MST | Severe Thunderstorm Warning | TWC | Pima | 46 min |
| Aug 1, 8:25 PM MST | Areal Flood Advisory | TWC | Pima, Pinal | 110 min |
| Aug 1, 8:44 PM MST | Flash Flood Warning | TWC | Pima, Pinal | 2 hr |
| Aug 1, 9:17 PM MST | Flash Flood Warning | TWC | Pima | 118 min |
| Aug 2, 11:40 AM MST | Special Weather Statement | TWC | Santa Cruz | 35 min |
| Aug 2, 12:20 PM MST | Special Weather Statement | TWC | Santa Cruz | 25 min |
| Aug 2, 2:48 PM MST | Special Weather Statement | TWC | Pima | 42 min |
| Aug 2, 3:04 PM MST | Special Weather Statement | TWC | Pima | 41 min |
| Aug 2, 3:08 PM MST | Special Weather Statement | TWC | Pima | 52 min |
| Aug 2, 4:05 PM MST | Special Weather Statement | TWC | Pima | 40 min |
| Aug 2, 4:12 PM MST | Severe Thunderstorm Warning | TWC | Pima | 48 min |
| Aug 2, 4:38 PM MST | Severe Thunderstorm Warning | TWC | Pima | 37 min |
Nearby
Special Weather Statements in Arizona, 2018Every special weather statement 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.