Alert archive / Arizona / Severe Thunderstorm Warnings in 2001
Severe Thunderstorm Warning 60, NWS Tucson, AZ
NWS Tucson, AZ issued this severe thunderstorm warning at Oct 7, 2001, 4:38 PM MST for Pinal County, Arizona. It was in force for 37 min. No storm report in the archive falls inside the area while it was in force.
The area
The outline the Iowa Environmental Mesonet reconstructed for it; the warning itself named whole counties.
The facts
- Issued
- Oct 7, 2001, 4:38 PM MST (23:38 UTC)
- Expired
- Oct 7, 2001, 5:15 PM MST
- In force
- 37 min
- Issued by
- NWS Tucson, AZ
- Area
- Whole counties; the outline is the Mesonet’s reconstruction
County Pinal County, AZ
The radar
The Phoenix radar (KIWA), 76 km from the middle of the area, began a volume at 23:38 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, 11.6 hours before the alert went out and 105 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
- 233 J/kg
- Mixed-layer CIN
- -67 J/kg
- Mixed-layer LCL
- 1362 m above ground
- 0-6 km bulk shear
- 27 kt
- 0-1 km storm-relative helicity
- 48 m²/s²
- 0-3 km storm-relative helicity
- 57 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.2
The text
As transmitted, in the capitals the NWS used until 2016.
076 WUUS55 KTWC 072340 SVRTUS AZC021-080015- BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE TUCSON AZ 438 PM MST SUN OCT 7 2001 THE NATIONAL WEATHER SERVICE IN TUCSON HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... SOUTHWESTERN PINAL COUNTY IN ARIZONA * UNTIL 515 PM MST * AT 435 PM MST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED AN AREA OF SEVERE THUNDERSTORMS ABOUT 23 MILES SOUTHWEST OF ELOY OVER NORTHERN PORTIONS OF THE TOHONO OODHAM NATION...MOVING NORTHEAST AT ABOUT 15 MPH. * THE SEVERE THUNDERSTORMS WILL BE NEAR... JACKRABBIT (ABOUT 10 MILES WEST OF FRIENDLY CORNERS) BY 445 PM MST A SEVERE THUNDERSTORM CAN GENERATE DAMAGING WINDS IN EXCESS OF 60 MPH...LARGE HAIL...FREQUENT LIGHTNING...AND VERY HEAVY RAINFALL. LAT...LON 3256 11204 3252 11180 3274 11158 3275 11195
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 Oct 7, 2:00 PM MST, 2 hours 38 minutes earlier.
Area forecast discussion, Oct 7, 2:00 PM MST, 2 hours 38 minutes before
SOUTHEAST ARIZONA FORECAST DISCUSSION NATIONAL WEATHER SERVICE TUCSON AZ 200 PM MST SUN OCT 7 2001 .SYNOPSIS...A STORM SYSTEM MOVING THROUGH ARIZONA WILL KEEP UNSETTLED WEATHER OVER THE THE STATE INTO MONDAY. SHOWERS WILL MOVE ACROSS SOUTHEAST ARIZONA TONIGHT AND DIMINISH MONDAY. EXPECT A DRYING TREND AS A TROUGH SETS UP OVER THE CENTRAL UNITED STATES BY MID WEEK. THIS WILL HELP TO KEEP TEMPERATURES DOWN AND GENERATE BREEZY PERIODS LATER IN THE WEEK. .DISCUSSION...WEAK LOW NOW PUSHING INTO SOUTHERN ARIZONA FROM SOCAL. HEATING HAS HELPED GENERATE ISOLATED CONVECTION THIS AFTERNOON WITH MORE ORGANIZED PRECIPITATION CLOSER TO THE LOW. THIS WILL MOVE THROUGH OVERNIGHT AND SHOWER COVERAGE WILL INCREASE TO SCATTERED ACROSS THE AREA AS IT DOES. LOOKING AT A DIMINISHING CLOUDS AND SHOWERS TREND TOMORROW (IN THE WAKE OF THE WEAKENING IMPULSE)...BUT ISOLATED MOUNTAIN CONVECTION STILL POSSIBLE IN THE AFTERNOON. STILL LOOKING AT SOME KIND OF MEAN LOW POSITION GENERALLY OVER CENTRAL STATES...BUT IT IS UNCLEAR WHETHER THIS WILL BE DOMINANT OR IF WE WILL RESIDE IN A MORE PROTECTED FRONT FLANK OF A DEVELOPING EASTERN PACIFIC RIDGE. AT ANY RATE...WE CAN EXPECT A DRYING TREND WITH TEMPERATURES NEAR SEASONAL NORMALS. PROBABLY SEE GRADIENT WINDS GET UP TO BREEZY LEVELS ACROSS THE AREA WITH WINDY POSSIBLE AT TIMES IN EASTERN PORTIONS. M .TWC...NONE.
Nearby
Severe Thunderstorm Warnings in Arizona, 2001Every severe thunderstorm warning in 2001
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.