Alert archive / Arizona / Severe Thunderstorm Warnings in 2001

Severe Thunderstorm Warning 17, NWS Tucson, AZ

July 13, 2001Cochise County, Arizona

NWS Tucson, AZ issued this severe thunderstorm warning at Jul 13, 2001, 5:27 PM MST for Cochise County, Arizona. It was in force for 48 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
Jul 13, 2001, 5:27 PM MST (00:27 UTC)
Expired
Jul 13, 2001, 6:15 PM MST
In force
48 min
Issued by
NWS Tucson, AZ
Area
Whole counties; the outline is the Mesonet’s reconstruction

County Cochise County, AZ

The nearest sounding before it

Tuscon, AZ (KTUS), launched 00:00Z, 0.5 hours before the alert went out and 74 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.

Skew-T log-pSkew-T log-p diagram, Tuscon, AZ at 00:00Z on 2001-07-14Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 106 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Tuscon, AZ at 00:00Z on 2001-07-14The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -4 square meters per square second.193958Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
106 J/kg
Mixed-layer CIN
-52 J/kg
Mixed-layer LCL
3507 m above ground
0-6 km bulk shear
25 kt
0-1 km storm-relative helicity
-4 m²/s²
0-3 km storm-relative helicity
102 m²/s²
Significant tornado parameter
0.0
Supercell composite
-0.1

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

995 
WUUS55 KTWC 140027
SVRTUS
AZC003-140115-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TUCSON AZ
527 PM MST FRI JUL 13 2001

THE NATIONAL WEATHER SERVICE IN TUCSON HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  WEST CENTRAL COCHISE COUNTY IN ARIZONA

* UNTIL 615 PM MST

* AT 521 PM MST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A 
  SEVERE THUNDERSTORM NEAR TEXAS CANYON ALONG I-10...OR 10 MILES     
  EAST OF BENSON...MOVING NORTHWEST AT 15 MPH.

HAIL...INTENSE RAIN...DAMAGING WINDS IN EXCESS OF 60 MPH...AND NEAR 
ZERO VISIBILITIES IN BLOWING DUST ARE LIKELY WITH THIS STORM. TAKE 
COVER IN A SUBSTANTIAL SHELTER UNTIL THE STORM PASSES.

LAT...LON 3195 10997 3211 10989 3231 11032 3209 11044

PYTLAK

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 Jul 13, 2:50 PM MST, 2 hours 37 minutes earlier.

Area forecast discussion, Jul 13, 2:50 PM MST, 2 hours 37 minutes before
SOUTHEAST ARIZONA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE TUCSON AZ
250 PM MST FRI JUL 13 2001

SYNOPSIS...HIGH PRESSURE TO OUR EAST WILL CONTINUE TO PROVIDE A
MOIST SOUTHERLY FLOW INTO ARIZONA. HOWEVER...A SOMEWHAT DRIER
SOUTHWEST FLOW WILL DEVELOP THIS WEEKEND AS A STORM SYSTEM CROSSES
THE NORTHERN ROCKIES...WHILE HIGH PRESSURE SHIFTS INTO WESTERN NEW
MEXICO.

DISCUSSION...UPPER LOW PRESSURE CIRCULATION OVER NORTHERN BAJA ALONG
WITH A SHARP MOISTURE GRADIENT ACROSS OUR EASTERN ZONES WERE THE
MAIN FEATURES TO FOCUS ON THIS EVENING. LATEST RADAR AND SATELLITE
IMAGERY INDICATED SCATTERED THUNDERSTORMS STRETCHING FROM THE WHITE
MOUNTAINS SOUTH ALONG THE MOUNTAIN RIDGE LINES TO NEAR DOUGLAS.
OTHER STORMS WERE FORMING ACROSS SOUTHWESTERN ARIZONA IN THE
VICINITY OF THE UPPER LOW. THE STORMS WERE STILL RATHER ISOLATED IN
NATURE...BUT MUCH STRONGER AND MORE WIDESPREAD THAN THE PAST FEW
DAYS. THE PRIMARY CONCERN FROM THESE THUNDERSTORMS WILL BE LOCALLY
HEAVY RAINFALL...BUT STORMS DEVELOPING ALONG THE MOISTURE GRADIENT
ACROSS COCHISE...GRAHAM...AND GREENLEE COUNTIES COULD PRODUCE STRONG
DOWNBURST WINDS. DECENT UPWARD VERTICAL MOTION ASSOCIATED WITH THE
LOW PRESSURE SYSTEM OVER NORTHERN BAJA MAY HELP SUSTAIN CONVECTION
THROUGH THE NIGHT TIME HOURS...ESPECIALLY ACROSS CENTRAL AND WESTERN
PIMA COUNTY. OTHERWISE...EXPECT MOST OF THE STORMS TO DISSIPATE BY
MIDNIGHT. LATEST MODELS CONTINUED TO SHOW A DRYING TREND AS A
MODERATE SOUTHWESTERLY FLOW ALOFT SPREADS INTO THE WESTERN ONE-HALF
OF ARIZONA. MRF MODEL WAS STILL SUGGESTING SOME POSSIBLE MOISTURE
SUPPLY LINGERING ACROSS FAR EASTERN ARIZONA FOR A CONTINUED CHANCE
OF AFTERNOON AND EVENING MOUNTAIN THUNDERSTORMS THROUGH NEXT WEEK.

.TWC...NONE.

The office that day

Everything else NWS Tucson, AZ issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jul 14, 1:42 PM MSTSevere Thunderstorm WarningTWCPima48 min
Jul 14, 2:42 PM MSTSevere Thunderstorm WarningTWCGraham, Pima48 min

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.