Alert archive / Alabama / Severe Thunderstorm Warnings in 1987
Severe Thunderstorm Warning 32, NWS Mobile, AL
NWS Mobile, AL issued this severe thunderstorm warning at Jul 1, 1987, 3:21 PM CDT for Mobile County, Alabama. It was in force for 54 min.
The area
The counties it named.
The facts
- Issued
- Jul 1, 1987, 3:21 PM CDT (20:21 UTC)
- Expired
- Jul 1, 1987, 4:15 PM CDT
- In force
- 54 min
- Issued by
- NWS Mobile, AL
- Area
- Whole counties
County Mobile County, AL
The radar
The WSR-88D network and its archive begin in 1991, so there is no radar volume for this alert.
The nearest sounding before it
Eglin AFB/Valpar, FL (KVPS), launched 12:00Z, 8.4 hours before the alert went out and 164 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
- 1393 J/kg
- Mixed-layer CIN
- -5 J/kg
- Mixed-layer LCL
- 613 m above ground
- 0-6 km bulk shear
- 6 kt
- 0-1 km storm-relative helicity
- 11 m²/s²
- 0-3 km storm-relative helicity
- -5 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000
TTAA00 KMOB 012021
SVRMOB
ALC097-012115-
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOBILE AL
321 PM CDT WED JUL 1 1987
THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM WARNING
EFFECTIVE UNTIL 415 PM CDT FOR PEOPLE IN THE FOLLOWING COUNTY...
IN SOUTH ALABAMA
...NORTHERN MOBILE
AT 320 PM CDT RADAR AT MOBILE INDICATED A SEVERE THUNDERSTORM NEAR
SEMMES, ALABAMA.
WHEN THUNDERSTOR*MS ARE OCCURRING...PEOPLE SHOULD MOVE INSIDE A
STRONG BUILDING. DO NOT STAND BY WINDOWS. DON'T USE TELEPHONES
OR ELECTRICAL APPLIANCES UNLESS IN AN EMERGENCY UNTIL THE STORM
HAS PASSED. MOTORISTS SHOULD NOT DRIVE INTO LOW WATER CROSSINGS.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.
In the hours before
Special weather statement, Jul 1, 10:35 AM CDT, 4 hours 46 minutes before
SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE PENSACOLA FL 1035 AM CDT WED JUL 1
Special weather statement, Jul 1, 10:42 AM CDT, 4 hours 39 minutes before
SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE PENSACOLA FL 1035 AM CDT WED JUL 1 1987 THUNDERSTORMS IN LINES AND CLUSTERS WERE DEVELOPING OVER THE WESTERN FLORIDA PANHANDLE FROM PENSACOLA TO PANAMA CITY. AT 1030 AM CDT...RADAR INDICATED SHOWERS AND THUNDERSTORMS DEVELOPING RAPIDLY IN NORTHWEST FLORIDA OVER ESCAMBIA...SANTA ROSA...AND OKALOOSA COUNTIES. THUNDERSTORMS WERE ALSO NUMEROUS IN SOUTHWEST ALABAMA. THESE THUNDERSTORMS ARE PRODUCING VERY HEAVY RAIN AND WILL CAUSE FLOODING OF STREETS AND POOR DRAINAGE AREAS. MOTORISTS ARE ADVISED TO REDUCE SPEED IN HEAVY RAIN AREAS AND ARE URGED TO AVOID AREAS OF STANDING WATER. THE THUNDERSTORMS WERE MOVING NORTHWAWRD 6 TO 10 MILES AN HOUR.
Special weather statement, Jul 1, 10:49 AM CDT, 4 hours 32 minutes before
SHORT-RANGE WEATHER SUMMARY NATIONAL WEATHER SERVICE MOBILE AL 1050 AM CDT WED JUL 1 1987 ...THUNDERSTORMS DEVELOPING OVER MUCH OF SOUTHEAST MISSISSIPPI AND SOUTHWEST ALABAMA...MAY PRODUCE SOME HEAVY RAINFALL... WEATHER SERVICE RADARS AT 1045 AM SHOWED THUNDERSTORMS DEVELOPING IN CLUSTERS AND SHORT LINES FROM 20 MILES SOUTH OF THE ALABAMA COAST INLAND OVER MOST OF SOUTHWEST ALABAMA. ALSO A FEW CLUSTERS WERE DEVELOPING OVER THE COASTAL MISSISSIPPI COUNTIES. THESE THUNDERSTORMS WERE MOVING TOWARD THE NORTH-NORTHEAST AT 15 MPH. THE THUNDERSTORMS WILL PRODUCE DANGEROUS LIGHTNING...GUSTY WINDS AND HEAVY RAINFALL THAT MAY CAUSE FLOODING OF STREETS AND ROADS. THOSE STORMS LOCATjED IN THE COASTAL WATERS MAY PRODUCE WATERSPOUTS. RESIDENTS AND MOTORISTS SHOULD BE AWARE OF THESE THUNDERSTORMS. THEY WILL INCREASE IN COVERAGE AND INTENSITY DURING THE AFTERNOON.
Special weather statement, Jul 1, 11:39 AM CDT, 3 hours 42 minutes before
SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE PENSACOLA FL 1140 AM CDT WED JUL 1 1987 AT 1130 AM CDT...NUMEROUS THUNDERSTORMS WERE OCCURRING IN LARGE CLUSTERS OVER THE PANHANDLE COUNTIES OF ESCAMBIA...SANTA ROSA... OKALOOSA...AND WALTON. THESE STORMS WERE PRODUCING VERY HEAVY RAINFALL AND FREQUENT LIGHTNING STRIKES. MOVEMENTS WERE NORTHWARD 8 TO 10 MILES AN HOUR. AN ESCAMBIA COUNTY DEPUTY REPORTED A SHORT LIVED FUNNEL CLOUD NEAR THE BRENT LANE AND PALAFOX INTERSECTION IN PENSACOLA AROUND 11 AM. MOTORISTS SHOULD REDUCE SPEED AND USE LOW BEAM HEADLIGHTS AND AVOID STANDING WATER OF UNKNOWN DEPTH. RESIDENTS SHOULD PRACTICE LIGHTNING SAFETY RULES WHILE THE STORMS ARE IN PROGRESS. STAY TUNED FOR LATER STATEMENTS OR WARNINGS.
Special weather statement, Jul 1, 3:21 PM CDT, 0 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE MOBILE AL 320 PM CDT WED JUL 01 1987 AT 315 PM CDT THE NATIONAL WEATHER SERVICE RADAR AT MOBILE INDICATED A VERY HEAVY THUNDERSTORM JUST NORTH OF THE MOBILE AIRPORT NEAR SEMMES, ALABAMA. THE STORM WAS MOVING TO THE NORTHEAST AT 20 MILES AN HOUR. PERSONS IN OR NEAR THIS STORM MAY EXPERIENCE BRIEF FLOODING OF ROADWAYS FROM THE HEAVY RAINS...FREQUENT LIGHTNING STRIKES AND VERY GUSTY WINDS. ADDIT#IONAL STATEMENTS WILL BE ISSUED AS NEEDED.
The office that day
Everything else NWS Mobile, AL issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 1, 2:04 PM CDT | Severe Thunderstorm Warning | MOB | Autauga, Montgomery | 56 min |
Nearby
Severe Thunderstorm Warnings in Alabama, 1987Every severe thunderstorm warning in 1987
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.