Alert archive / Arizona / Severe Thunderstorm Warnings in 1997
Severe Thunderstorm Warning 3, NWS Tucson, AZ
NWS Tucson, AZ issued this severe thunderstorm warning at May 19, 1997, 11:59 AM MST for Pinal County, Arizona. It was in force for 46 min. No storm report in the archive falls inside the area while it was in force.
The area
The counties it named.
The facts
- Issued
- May 19, 1997, 11:59 AM MST (18:59 UTC)
- Expired
- May 19, 1997, 12:45 PM MST
- In force
- 46 min
- Issued by
- NWS Tucson, AZ
- Area
- Whole counties
County Pinal County, AZ
The nearest sounding before it
Tuscon, AZ (KTUS), launched 12:00Z, 7.0 hours before the alert went out and 92 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
- 295 J/kg
- Mixed-layer CIN
- -196 J/kg
- Mixed-layer LCL
- 2139 m above ground
- 0-6 km bulk shear
- 14 kt
- 0-1 km storm-relative helicity
- 5 m²/s²
- 0-3 km storm-relative helicity
- 12 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
725 WUUS1 KTUS 191902 RRA SVRTUS AZC021-191945- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE TUCSON AZ 1159 AM MST MON MAY 19 1997 THE NATIONAL WEATHER SERVICE IN TUCSON AZ HAS ISSUED A SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 1245 PM MST FOR PEOPLE IN THE FOLLOWING LOCATION... IN SOUTH CENTRAL ARIZONA ...SOUTHEASTERN PINAL COUNTY AT 1153 AM MST...DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM IN THE VICINITY OF ORACLE MOVING NORTHEAST AT 10 MPH. SOME LOCATIONS IN THE PATH OF THIS STORM ARE... SAN MANUEL BY 1211 PM MST THIS STORM MAY CONTAIN LARGE HAIL AND STRONG WINDS IN EXCESS OF 58 MPH.
What forecasters said that day
The local office's own words before this severe thunderstorm 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 severe thunderstorm warning went out at May 19, 9:15 AM MST, 2 hours 44 minutes earlier.
Area forecast discussion, May 19, 9:15 AM MST, 2 hours 44 minutes before
SOUTHEAST ARIZONA FORECAST DISCUSSION NATIONAL WEATHER SERVICE TUCSON AZ 900 AM MST MON MAY 19 1997 WATER VAPOR SHOWS DISTURBANCE MOVING NWD THROUGH PHX CWA. LOTS OF EARLY MORNING LIGHTNING ASSOCIATED WITH THIS FEATURE. OTHER VORTICITY MAXES SEEN IN CENTRAL CA/SWRN NV AND NRN BAJA. HIGH IMAGER PW VALUES PUSHING NWD THROUGH WRN AZ. SURFACE DEW POINTS REFLECT HIGHER VALUES N AND W OF TUS. DIURNAL WINDS MAY ADVECT MORE MOISTURE INTO TUS. IMAGER LIS ALSO SHOWING MOST UNSTABLE ATMOSPHERE OVER WRN AZ. FOR TUS CWA...WITH BAJA VORTICITY MAX MOVING NEWD ACTIVITY SHOULD BE FOCUSED FROM TUS EWD TODAY. 12Z TUS SOUNDING SHOWING A FEW DEGREES COOLING. BUT AMOUNT OF HEATING WILL STILL DEPEND ON HOW SOON THE DEBRIS CLOUDS DISSIPATE. TUS 222 TUS...NONE
The office that day
Everything else NWS Tucson, AZ issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 19, 12:53 PM MST | Severe Thunderstorm Warning | TWC | Pinal | 47 min |
| May 19, 1:36 PM MST | Severe Thunderstorm Warning | TWC | Pinal | 29 min |
| May 19, 2:12 PM MST | Flash Flood Warning | TWC | Pinal | 93 min |
| May 19, 2:46 PM MST | Flash Flood Warning | TWC | Pinal | 64 min |
| May 19, 2:46 PM MST | Severe Thunderstorm Warning | TWC | Pinal | 64 min |
Nearby
Severe Thunderstorm Warnings in Arizona, 1997Every severe thunderstorm warning in 1997
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.